S103. A.2. PROCEEDINGS OF THE COTTESWOLD NATURALISTS’ CLUB. VOLUME Il. GLOUCESTER : PRINTED BY N. PERBINS, WESTGATE STREET. 1860. CONTENTS OF VOL. JT. President’s Annual Address for 1854 On Hand Bricks from the Island of Herm. By W. V._ Guise, Esq. b? aie Notes on British Ferns. By Professor BucKMAN A description of some new species of Echinodermata from the Lias and Oolites. By THomas WRIGHT, Esq., M.D., (with figures) : ‘ Upon a new species of iY arte soya upon “the Coast of Herm. By W.V. GuisE, Esq., F.L.S., F.G.S. President’s Address, 1855 =e Notes on the Natural History of the Baices of Gloucester. By ' Professor BUCKMAN On Fossil Echinodermata from the Island of Malta (with eased: By Tuomas Wricat, Esq., M.D., F. G.S., F.R.S.E. On Perna Quadrata. By Joun Lycexrt, Esq. : On a new genus of Fossil Cidaride, with a synopsis of the species included therein. By Tuomas WricuT, Esq., M.D. On some new species of Hemipedina from the Oolites. By Tuomas Wricut, M.D., F.R.S.E., F.G.S. Note on the Subgenus Limea, Bronn. By Jonu LYCETT, Sik Remarks on the Inferior Oolite and Lias in parts of Northamptonshire compared with the same formations in Gloucestershire. By the Rev. P. B. Bronx, M.A., F.G.S. Notes on the Genus Quenstedtia. By JoHn LyceTt, Esq. .-- President’s Address, 1856... “8 as Inundations in Ancient Corinium. By Professor BuckKM4N .. Annual Address, 1857. By Professor BucKMAN .. a6 Brief Notes on Cirencester High Cross (with plate). By CHARLES Poo.ey, Esq. x a ifs xii Viii xiv iv List of Birds seen in Siddington, Gloucestershire. By EDWARD Bow ty, Esq. + ee President’s Address, 1858 an Notes on Bisley Cross (with plate) ; a a Communication on Friar Bacon. By CHARLES PooLEY, Esq. se 56 Notice of some Rare Bats from the neighbourhood of Gloucester and Cheltenham. By W. V. Guisz, Esq., F.L.S., F.G.S. Remarks on the Lias of Barrow, in Leicestershire, compared with the Lower Part of that formation in Gloucestershire, Worcestershire, and Warwickshire. By the Rev. P. B. BRODIE ais . ee ee On the Sands intermediate the Inferior Oolite aa Lias of the Cotteswold Hills compared with a similar deposit upon the Coast of Yorkshire. By Jonn LycetTt, Esq. ie On the discovery of Cnicus Tuberosus at Avebury, Wilts. By Professor BucKMAN, F.L.S., kc... ae 3 Note on the presence of the Fossil Genus Isodonta, Buv in the English Jurassic Rocks. By Joun Lycert, Esq. On some sections of the Upper Lias recently exposed at Nailsworth, Gloucestershire. By Joun Lycett, Esq. President’s Address, 1859 _ «.. sre os vis Notes on the Inferior Oolite Beds in the neighbourhood of Bath. By W. V. Guisz, Esq., F.L.S., F.G.S. President’s Address, 1860 .. a On Rhynchonella Acuta and its affinities. By Joun Jones viii xi 139 142 xii 141 An Address to the Cotteswold Club, delivered on January the 31st, 1854, By T. Barwicx Luoyp Baker, Esa., President. Hight Summers, my friends, I think I may say of enjoyment, and we will hope of improvement, to all of us, have now passed over our Cotteswold Club, and again at our Winter Meeting it is my task to lay before you a slight reminiscence of what we, as a club, have seen and done in the last two years. Such a retrospect is usually made annually ; but a circumstance occurred last year which, alas, threw us out of our usual course. I need not call on those comparatively few who stood, in July, 1846, on Birdlip hill, around Sir Thomas Tanered, who had called us together, and at his suggestion formed the plan of those plea- ~ gant rambles which, under his guidance, have given us for now nearly eight years some of the most satisfactory and enjoyable days we have spent—l need not, I say, call on those few, but I appeal to all who have since joined our gatherings, and have seen how his love of science and his constant good nature and attention to all have, up to last year held our club together—to say whether the loss of such a man was not sufficient to throw us out of our usual course, and excuse any breach of our regular routine. True, he did not leave us without finding a successor. True, that that successor has supplied the place right well—and truly grateful are we to him for the zeal and kindness and attention he has shewn to us, yet I think that even Professor Buckman will be one of the first to join us in regretting the absence of Sir Thomas Tancred. But let us lose no time in vain regrets, as we have much to do. On February the 10th it had been arranged that the Club should meet at Bristol. Many of us came down on the previous evening, and greatly enjoyed some hours spent at the house of Mr. King, the celebrated optician, in seeing a most interesting collection of _ Diatomacex and Desmidex, prepared by Thwaites, and beautifully shewn by one of the finest and most complete microscopes ever made for the reception of Ross’s object glasses. The interest of these, and of many other curious instruments—among them the then new stereoscope—was much heightened by the kindness and the happy explanations of Mr. King himself, and it was late ere we returned to our inn. The next day, after breakfast, we proceeded, under Mr. King’s guidance, to a most curious old house, now a bookseller’s, but formerly the residence of that princely merchant of Bristol, Canynge, the re-founder of that architectural gem of the old city, the church of St. Mary de Redcliffe, where we afterwards saw his tomb. The back part of the present shop was formerly a Chapel, or Oratory, and remains if unimproved, at least unspoiled; the floor, and a gallery half way up the walls appear untouched since A 2 Canynge’s day, as does the very small room behind it, which was probably the ordinary abode of the great merchant. Thence we went to the Cathedral with its fine Norman Chapter room, the Mayor’s Chapel with its encaustic tiles and gorgeous blazonries, and the newly decorated Merchants’ Hall, and then spent an enjoyable hour or two—all too short, in the Park Street Institution. Being here joined by several other Members of the Club, amongst whom, one of the principal was, alas, our deeply lamented friend Strickland, who brought with him his friend Mr. W. Saunders, a geologist of repute, and well acquainted with the coun- try, we agreed, though our winter meetings are usually confined to the house—yet, as the day was fine, that we would explore the Gorge of the Avon, through whose magnificent cliffs of mountain limestone the river has apparently forced its way, presenting a series of geological phenomena, scarcely equalled for interest and grandeur. The varied arrangement of geological beds in this immediate vicinity, independently of the physical changes and contortions to which they have been subjected, renders the examination of the geology of the district highly instructive. Here we see the Mountain Limestone and Mill- stone Grit, at high angles of inclination, bringing up the Coal Measures, which are succeeded by the New Red Sandstone series and the Lias; and, at a distance of three or four miles, Dundry Hill presents its out-lying mass of inferior oolite. The latter indeed we did not reach, but returned from a longer ramble than our winter meeting usually permits, well satisfied though we made no greater discoveries to svience than a Conularia in situ at the base of one of the cliffs quarried for road stone, which, so far as any then present knew, had never before been observed in that formation. If, however, we had done nothing to instruct or enlighten the learned of the land, it was something not to be despised, if we had in any degree enlightened ourselves by leading our own minds to thoughts connected with the great truths of nature. At least so thought simplehearted naturalists like— Strickland. After dinner Mr. Jones produced his drawings of the hierogly- phics on the mummy presented by E. Hopkinson, Esq. to the Literary and Scientific Society at Gloucester. But Mr. Jones found that he had it not all to himself, for Mr. D. W. Nash, an active member of the Syro-Egyptian Society, having come to dine with us, a discussion on the interpretation of the heiroglyphs ensued ; which had the effect of shewing to those ignorant of the matter, like myself, how very nearly two men who have separately studied even so abstruse a science as that of Egyptian hieroglyphs, may bring their interpretations to the same point. On Tuesday, May 4, 1852, the Club met at Cheltenham, and, after breakfasting at the Lamb, proceeded, under the excellent guidance of Dr. Wright, for Southam, whence, ascending the hill to the Rising Sun, we turned to the right over the down of Cleeve > 3 Cloud, stopping a few minutes to look at one of the finest views in the upper part of the vale of Gloucester—wanting, indeed, the variety afforded by the broad estuary of the Severn, as seen from the hills nearer Bristol; but shewing most grandly the beauties of the upper part of the vale, with the Malvern and Abberley hills on the one side and Bredon on the other. After a walk over the down, we reached the quarries above Postlip, but I fear that our Geologists found but little encourage- ment from a most unfossiliferous bed of freestone; while at Postlip itself we should have much more enjoyed the sight of a fine old mansion, (though now somewhat dilapidated and used as a farm house,) had we not been previously somewhat saddened by the sight of a once beautiful though small chapel, converted into a cow-shed. All the information we could get, was that “It hadn’t been used asa chapel for twenty years, and, for aught they could tell, not for fifty.’ Thrice the latter period would probably have been nearer the mark. ' Here we called a council of war, and agreed to form sections. The one party continuing their geological examination of Cleeve Hill, on the summit of which they lighted on a somewhat peculiar bed of sand, while others walked on to Sudeley Castle, where, though from the absence of the kind and hospitable owner we were prevented from seeing the interior of the house, the exterior well repaid our walk. After dinner was read,—alas, in Mr. Buckman’s absence,—his interesting notice of a new sepiostarium, obtained from the Lias Clays, at Cheltenham, remarkable as being so nearly allied to the true sepias of our present seas: thus differing widely from the Belemno-sepias, or Belemnites, which are so abundant in the Lias. The present individual possessed a very perfect ink bag, which, with its tube, measuring about four’inches, was full of the fossilized pigment, mineral sepia, from which drawings, illustra- tive of the specimen, had been made by Professor Buckman. On the 22nd of June, we met at Fairford, ina great measure for the purpose of examining that most interesting collection of the corals found in that neighbourhood, by Miss Slatter, whose researches may yet throw a new light on the stratigraphical dis- tribution of the rocks around Fairford. But the subject of corals is one which is wont to give rise to such long though highly interesting discussions, that, as we have plenty of work for this evening, the corals shall be left to their rest. We next went to the church, whose magnificent windows of painted glass were most ably illustrated and explained by Mr. J. D. Thomas Niblet, whose long study of the subject makes us wish much that we had a more fully published account of the church from his pen and pencil. So thoroughly, indeed, is he “ at home” here, that at one period the only direction by which a letter could find him was—J. D. Thos. Niblet, Esq., West Window, Fairford ~ Church. The site of the Fairford Saxon graves, situated about one mile A2 4 from the town, was our next point; but, as the investigations under Mr. Wylie have long been discontinued, there was but little visible evidence of those resting places of about one hundred bodies of our Saxon forefathers, whose remains, corporeal and ornamental, furnished Mr. Wylie with such curious evidence of the manners and customs, arts and manufactures, of the ancient Saxon race, as he has given us in his interesting volume, entitled Saxon Graves. A few beads, from a cottager, furnished us with a souvenir of the Saxon; some of pottery inlaid with strips of glass or enamel, others of amber. We know not whether this gum was supposed to possess any extraordinary charm, but it appears to have been much cherished by the Saxons, and the number of heads of this description found at Fairford would fill two or three pint measures. On August 8rd we met in Gloucester and took the rail to Chepstow; a more scientific party may have occasionally met to- gether, but not often a party more thoroughly disposed to enjoy an exquisite day amongst exquisite scenery. We started from Chepstow on a coach under the guidance of my excellent trooper, Jem Dobbs, of the White Hart, who drove us to within a short distance of the summit of the Windcliffe, whence we saw at our feet such meanderings of the Wye, that a cannon-ball would cross the river four times in its course to Chepstow Castle ; while, if we raised the eye above the rock and wood:of the opposite bank, it met the full range of the Cotteswold hills in the distance. Descend- ing to the Moss Cottage, where we again found our vehicle, which descent was performed by some vid the path with steps leading from the right of the summit, (where by the way we found the Asplenium trichomanes, growing in unusual Juxuriance and beauty), and by others, more adventurous, who determined to find or make a way to the left, (by that extraordinary providence which the Musselman believes to attach to certain classes none were killed: Jem Dobbs still points out the scar of rock which one came down)—by right or left all finally arrived at the bottom and proceeded to Tintern. I will not attempt to give any ideas of my own of this exquisite Abbey, but, as I in right of my office as President, claim the right of plagiarizing to any extent from the ideas of any of our mem- bers, a privilege of which I avail myself largely, often without acknowledging it, I will read Professor Buckman’s ideas of it as slightly better than any I could give of my own. An examination of its details must leave the following impres- sions upon a thoughtful mind :— 1st, The great economy of materials, every part being nicely adjusted to the work it had to do. 2nd, The complete absence of constructive ornament, its carv- ings are merely for the ornamentation of some useful and necessary part of the structure, and in no instance is anything unnecessa- rily obtruded so as to display ornament. - 3rd, The ornamentation has been so nicely balanced, that the 5 whole structure strikes one as perfection ; presenting an unity of purpose which precludes the idea of what the Artist calls spotti- ness. 4th, The work has been executed with such exactitude and freedom of hand as seen in the capitals and bases of columns, in the window mullions, and the bosses of the groined roof, as. at once must give us a lofty idea of the mechanical skill and the deep heartfelt emotions with which the artificer, no less than the de- _ signer of a sacred pile, were both actuated in past times. The neighbourhood of Tintern is exceedingly rich in native plants ; amongst which the Campanula latifolia, Hypericum andro- semum, H. montanum, and Euphorbia platyphylla are remark- able. The geology of the Wye is of great interest, in the masses of old red sandstone conglomerate, standing out boldly on the banks of the stream, supporting the superincumbent mountain limestone. Returning to Chepstow Castle, we spent an hour among its picturesque ruins, (observing, amongst other plants, that death- like parasite the Orobanche hedera, or Ivy broomrape, growing from the roots of the Ivy,) and then returned to the White Hart, after examining and admiring the beautiful mechanical con- struction, though in no degree whatever admiring the picturesque beauty of that singularly hideous contrivance, the new railroad tubular bridge. On the 14th of September we met at Gloucester, and proceeded in my break, which has gradually become dignified by the name of the Club Omnibus, to Huntley. Here we divided, and while some ascended May Hill, and enjoyed the glorious view we had before seen and attempted to describe, others strolled through the Silurian quarries of Longhope. But, alas, there was a cloud on this meeting, which not the view from May Hill, nor the interest of the Longhope quarries could brighten. We were here to take leave of him who had first called us together, who first suggested the idea of the Club, and by his constant attention had hitherto held us together, and endeared himself personally to every member. We will say no more than to be thankful for two things. First, that we have had several letters from him, speaking with delight of his new home, where we will sincerely wish him every happiness ; and secondly, for ourselves, that his place is filled by a successor in every way so desirable as Professor Buckman. Our Winter Meeting took place on January 31st, just twelve months ago, at the house of your unworthy President, and glad indeed would the said President be to think that the day at Hardwicke afforded nearly as much pleasure to the members as their visit gave him. _ We took a short walk, spite of wet and dirt, to the Reformatory School, which has since then obtained an amount of public noto- riety little anticipated; in which, by the way, I have managed somehow, unintentionally, to obtain for my own name the credit 6 due to that of Mr. Bengough, as effectually as I am in the habit of stating Mr. Jones’s or Mr. Buckman’s ideas in an address, and passing them off as my own. As I am, by the way, addressing a Club composed principally of Gloucestershire men, I may perhaps be pardoned if I indulge in a little quiet county boasting; as it is not, I think, foreign to the purpose of our Club to notice the deeds of good men of our county. Hence we find that fifty years ago the gaols throughout the world were in a state that nowadays we cannot read of without much pain. Ido not speak of the temperature being three de- grees too hot or too cold, or the gruel too thick or too thin, but I speak of the days when sprigs of rue were laid round the prison- er in the dock; a custom still continued in many places for custom’s sake, but then used in the hope of preventing those in court from catching the gaol fever, which arose from the filth, starvation, and misery, to which the prisoners were exposed, nay, on one occasion, chronicled as the Black Assizes, at Oxford, in 1577: Baker's Chronicle, informs us that “all who were present died within forty hours: the Lord Chief Baron, the Sheriff, and about three hundred more.” Howard, to whose name be all honour, drew public attention to the dreadful state of the matter, but it was reserved for a Glou- cestershire Magistrate, Sir G. O. Paul, to invent a system which should remedy the evil. This system was first carried out in Gloucester gaol; thence it was taken to America, and, they said, greatly improved upon. It was tried in all parts of the world and improved upon everywhere, till at last, after fifty years considera- tion of the subject by all the world, after it had been improved upon till it was greatly altered from the original plan, the last great crowning improvement has been, to bring it back to nearly what Sir G. Paul first made it. This, Gentlemen, I hold to be a triumph gained for Gloucester- shire, by our excellent old Chairman, worthy of the notice of a Club who take an interest in all matters connected with the county. And perhaps it may be not without interest to remark that we do not appear to be retrograding, but that, as by Sir G. Paul's labours, who followed out the triumphs of Howard, Glou- cestershire was the first county that possessed a good gaol, so by the energy of Mr. Bengough, who has followed out the system of poor Captain Brenton, Gloucestershire is the first county that has made adequate provision for the cure of its juvenile offenders. Forgive me, Gentlemen, if I have said too much on this point, but the kindness with which you have frequently allowed me to digress has perhaps spoiled me. From the School we walked over Acklow (or rather, I suspect, Oakleigh,) hill, to the lias quarry of Elmore, where the insect limestone was said to be opened to large extent; but, if I remem- ber right it was in the south western pit where Mr. Brodie found the true bed. Our dinner was marked by two circumstances—First, the 7 alarming announcement that, instead of our usual subscription of from one shilling to three and sixpence a. year, a call was now to be made, amounting to fifteen shillings. "When, however, it was remembered that we had paid no subscription the previous winter, we were somewhat pacified. When we thought of Dr. Wright’s most valuable papers, which he had read, and the exquisite speci- mens he had produced to us of the Pteroceras Wrightii, and the Echinoderms, of which copies were promised us, we were recon- ciled; but it was not till the work was actually produced, on May 8rd, and we were able to estimate the credit accruing to our Club from the production of a work so valuable in its letter-press, and so beautifully illustrated, as Dr. Wright’s care has rendered it, that we were quite happy. The second, and more important, as well as more agreeable feature of the day was, that amongst our visitors was the Rev F. Symonds, of Pendock, a member of the Woolhope Naturalists’ Club, and President of that newly established at Malvern ; both clubs, we believe we may venture to say, formed on our model. If nothing had been seen or done on this day further than to make arrangements for the meeting of our Club, which took place on the 7th of June, and which laid the foundation, we trust, for many future annual meetings—that alone would have been sufli- cient to mark the day in the annals of our Club. On May the 2nd, the Club commenced its summer rambles for 1853, at Gloucester, whence we proceeded by steamer down the canal to Sharpness. The weather certainly did not favour us, but it gave us a proof that the interest in the study of nature is not so dependent upon mere weather as many might suppose. It poured the whole day! We went in the cabin of the steamer all the way to Sharpness—we sat in the kitchen of the cottage nearly all the time we were there—and we returned in the cabin of the steamer. Yet interesting discussions filled up the greater part of the time; and particularly Mr. Buckman having crept out into the garden for a few minutes, under an umbrella, had col- lected a number of varieties of the common Primrose, which afforded us, from simple elements, and in simple language, a lecture such as Professor Buckman can give, revealing in a simple form some of the great truths of the physiology of the vegetable kingdom. On the 7th of June was our great field day, on which we were to appear, I may say, in the very respectable position of fathers and grandfathers to the Clubs of Woolhope and Malvern. And well did the day turn out, to realize our best hopes, though, alas, a sad shadow is now thrown on our remembrance of it. We of the Cotswold Club met at Gloucester, and, after break- fast, proceeded in the Club Omnibus to near Eastnor, where alighting and walking to the Valley of the White-leaved Oak, — (alas, the name is merely traditionary, no white-leaved oak now existing)—we met Mr. Symonds and many members of the Malvern Club, and Mr. Lewis, the President, with a considerable 8 number of the Woolhope Club. Proceeding along the ridge of of that most interesting line, known as the Malvern Range, for some distance under the guidance of our lamented friend Strick- land, it will long live in the recollection of those who enjoyed it, that he proposed a half hour’s halt on one of the peaks, and, while we lay on the greensward around him, gave us such a brief but comprehensive lecture as few save Strickland could give, on the vast and extraordinary disruptions which, as far as human proof could shew, had caused the features of the exquisite land- scape now spread at our feet: shewing how and at what period that wondrous cliff on which we stood was reared, which though now, from the washing away of its apex, stands but a few hundred feet in height, must at one time, in all probability have towered two miles in height above the Worcestershire vale, now stretched at our feet; while the latter, probably in those days and long after, was a broad arm of the sea, separating England from Wales. Deeply as we lament our loss of such a man, endeared to most of us as a friend, as much as admired by all as one of the most eminent naturalists of the day, I cannot but for my own part re- joice that the last recollection we have of him was one so truly characteristic. Proceeding through Lord Somers’s Park, where we examined some of the Silurian beds, to the inn at Eastnor, (not having time, alas, to make a digression even to see the mistletoe in the oak, a short distance from the end of the ridgeway drive), we reached the inn, and dined, to the number of sixty members of the three Clubs ; the principal feature of the evening being, I think, the appointment of a committee who undertook to draw up for us a Flora of Worcestershire, Gloucestershire, and Herefordshire. We trust that this may not be lost sight of. A most interesting paper on fishes of his county, was read by Mr. Whateley, and one by Mr. Lees, on the Malvern flora, and one by Mr. Davies, of Tewkesbury, on the natural history of the swallow. On July 16, we again attempted the visit to Sharpness, the pleasure of which, if not altogether lost, had been sadly diminished by the rain; and this time we were more successful. After breakfasting at the Spread Eagle, at Gloucester, we embarked in the Waye steamer, which took us down the canal to Frampton bridge ; from whence we walked accross to Fretherne Cliff, and returning to the canal proceeded by steamer again to near Pur- ton Cliff, where the Lias and Silurian Strata appear in close proximity, From hence we walked by the grand works of the Basin at the mouth of the Gloucester and Berkeley Canal to Sharpness Point, a small pleasure ground of Lord Fitzhardinge’s, which juts out boldly into the Severn, affording an exquisite view of the lower part of the estuary down to Bristol and Chepstow. On August 16, we made a new experiment in our Club, and, emboldened by our previous success, we ventured to invite a large party of Ladies to our meeting at Cirencester. Alas! the weather was less propitious than our fair guests, The latter came in con- 9 siderable numbers, but the rain poured down without ceasing. Delightful walks through the Park had been proposed, but were clearly out of the question. Never mind. If people are blessed with good humour, and a determination to make the best of circumstances, they are not easily defeated. We went to the Church, where the kind Rector, Mr. Powell, occupied us well and profitably in shewing and explaining to us the highly interesting features of the building, which he has partially restored with excellent taste. We then put ourselves under the guidance of Professor Buck- man, to see the pavements discovered in the town, which he has so ably illustrated in his “ Coriniwm,”’ and which we trust will ere long be placed in a building now in actual course of erection, under the care of Lord Bathurst, (who, I am sure, will forgive the impatience with which the work is looked upon,) which will add a feature of so great interest to the town. After seeing these, however, a couple of hours still remained to dinner, and the rain continued. We went to the Museum. Perhaps we may be forgiven if we say that the room had not the appearance of light and gaiety most captivating to Ladies. Nevertheless, Dr. Wright, who understands his subject so truly as to be never at a loss, taking his subject from a small collection of echinoderms, but branching from thence into the general principles of fossil zoology, gave us an off-hand but most interest- -ing lecture, which, with a reply by Mr. Buckman, allowed us scant time to return to prepare for dinner. After dinner the time was spent very agreeably, by examining a large variety of drawings and specimens, and listening to a very interesting discussion on the habits of the Hedge-hog. On Sept. 20, the Club met to breakfast at Painswick House, by the invitation of our hospitable member, Wm. Henry Hyett, Esq. Mr. Gyde exhibited after breakfast a most perfect camera, for taking photographs, I think in less than five seconds. We then walked through the gardens to a beautiful collection of Ferns, which were flourishing as they are rarely seen to do in a newly planted collection, and returning to the house examined the stained woods for the successful preparation of which Mr. Hyett has long been celebrated, together with some trunks of trees, now in the progress of absorption. The process is inte- resting, independently of the staining of the wood, as presenting several new and curious features in vegetable physiology. One party then went to examine the Quarries near the Horse- pools, while the remainder walked over Painswick Beacon, passing the spot on which it is recorded that the unhappy Charles stood with his sons, watching his army retiring from Gloucester, till the eldest being tired, begged him to go home, and the monarch made the sad but memorable reply, “ My Sons, we have no home to go to!” Leaving the grand encampment which crowns the summit, we proceeded to Pinknash Park, the seat of James Ackers, Esq. 10 where, in seeing his very curious and beautiful mansion, eating his excellent luncheon, and seeing his magnificent Hereford cattle, scarce time or appetite were left for the dinner at Pains- wick. Forgive me, Gentlemen, that I have detained you so long, but as you have, alas, been shewn in the pecuniary affairs of the Club, when we miss the payment of one year the next is likely to fall heavy, so not having bored you with an address this day twelvemonth, you must now grumble as little as you can at a heavier infliction this year. If, however, I have not spared you, I think you will forgive a record of Meetings which, I may venture to say, have occasioned so much enjoyment as those of the Cotteswold Club. Ee On Hand-bricks, from the Island of Herm, By W. V. Guisz, Esa., F.G.S. In the course of a ramble amongst the Channel Islands, last summer, my attention was attracted by the unusual abundance of those “ cairns” of stones, known by the name of “ Cromlechs,” which, in the little Islet of Herm, in particular, meet the eye everywhere, in the vallies as well as upon the eminences, and which, to the least poetical observer, lead the mind back to periods of dim and remote antiquity, when it might well seem that the vast Cyclopean masses around were “ Rear’d by the hands of giants, In god-like days of old.” The exploring pick of the patient antiquary, however, speedily dispels these imaginings, and dreams of white-robed priests, and altars streaming with the blood of human victims, vanish before the cold realities of Truth, and the supposed temple, or altar, turns out, in every case which has been satisfactorily investigated, to be a place of burial, a vault or catacomb, which has, in most instances, been not merely the sepulchral chamber of an indivi- dual, but has been evidently used for the purpose of interment of many successive generations. A vast proportion of those now visible (for many have been destroyed and all vestiges of them removed during the last century) have been explored by that able and indefatigable anti- quary, Mr. C. F. Lukis, of Guernsey, whose papers, scattered through the earlier volumes of the Archeological Journal, have thrown so much light upon this obscure subject. In his Museum I first observed the baked clay clumps, or “ Hand-bricks,’’ as he ealls them, which I have the pleasure of laying upon the table this evening ; and during a short visit afterwards to the Islands of Herm I had an opportunity of investigating an almost inexhaus- tible hoard of the same singular objects, stored up in a manner and to an extent which would appear to defy the ingenuity of the most speculative mind to account for. The site of this deposit in the Islands of Herm, is a sea-cliff of sand, about 40 feet in height, resting upon solid rock, the spurs of which projecting below, prevent the encroachments of the sea. The sole outward indication of the buried hoard is to be found in the appearance upon the surface of the cliff of extraordinary quantities of limpet shells, scattered in profusion over the sand, and which, taking their presence as a standard of measurement, would seem to manifest an extension of the deposit to the distance of nearly a quarter of a mile. It was the presence of these shells in such unusual abundance which first drew the attention to the spot of an intelligent fisherman, who had been employed by Mr. Lukis, in assisting him in his researches, who, connecting these shells with those found in such remarkable profusion in the 12 cromlechs which he had seen opened, was led to make excavations which resulted in the discovery of the vast storehouse of curious objects similar to those now before us. The soft and yielding nature of the sandy cliff offers but little resistance to the pick and spade, and at the distance of little more than three feet from the surface, are found the baked clay clumps, to which have been given the name of “ Hand-bricks,” because, as will at once be observable upon inspection, they have been formed by simply moulding in the grasp a handful of kneaded clay, and then stamping the ends upon flat boards or stones, in which state they have been fired ; and their surface still bears the imprint of the cuticle and fingers which were employed in their manufacture. They are found, not lying indiscriminately, but packed together with evident order, care, and arrangement, lying transversely over and across one another, and, at intervals, as if to support the weight and pressure, are placed a sort of rude flat bricks, shaped as if formed without a regular mould, but merely pressed together with boards; the length I was not able to ascertain, having failed in procuring a perfect example, but probably 14 or 16 inches. Associated with these is a great abundance of broken pottery, both baked and unbaked, mostly coarse and of the rudest manu- facture, but here and there portions occur which bear marks of the wheel, and of more careful elaboration. J have unfortunatel lost the only specimen illustrative of this fact which I possessed, but it was apparently sun-dried, and of finer clay than any of the examples now before us. Limpet shells innumerable are profusely distributed throughout the deposit, which, from age, have parted with their animal matter, and adhere more or less to the tongue. The accompanying stone* was disinterred at the same time; to which I draw attention, as it will be seen, upon examination, that _ it is not in its normal condition, but bears marks, in its bevelled edge and smooth surface, of having been subjected to friction, and made use of probably as a muller, in the manufacture of the clay for the accompanying pottery. The old fisherman who was my guide attributed the fabrication of the “ Hand-bricks”’ to the Druids, who, like other representa- tives of unknown powers, are occasionally made responsible for facts which cannot be referred to any known origin. Amongst ourselves, Julius Cesar and “ Old Scratch” divide the honour of similar ascriptions. Mr. Lukis, however, informs me that the period to which they may most probably be referred is the Romano-British or Gaulish, but that this point is doubtful and requires further elucidation. It seems possible, indeed, looking to the isolated situation of these islands, that their inhabitants may have remained in a rude and barbarous condition, and have retained their primitive habits, uses, and customs, for a considerable period after the tribes in- * The Stone here referred to, together with specimens of the Hand-bricks and Pottery, were laid upon the table at the time this paper was read, and are now deposited in the Museum of the Royal Agricultural College, at Cirencester. 13 habiting the neighbouring continent may have been converted to a more civilized mode of life. Thus it may not be impossible that the ancient processes of manufacture, together with religious rites and modes of interment, may have come down to a much later date than even the Roman occupation of the adjoining continent. We see instances in point now, amongst the barbarous tribes of the Polynesian Islands, who, in spite of steam navigation, and continual intercourse with more civilized nations, still cling to their axes of jade and arrows tipt with bone; and I have read, that, within the last century, Pagan rites were celebrated upon the Isle de Batz, and other islands upon the northern coast of Brittany. The purpose served by these “Hand-bricks” would seem to be explained in some measure by their association with the broken pottery, which goes to substantiate the supposition that they were in some way used in the process of its manufacture, possibly as a sort of rude furnace, which would have afforded a means of economising wood, which is, and always must have been, scarce upon those rocky islets. Mr. Lukis informs me that similar substances, that is “ Hand- bricks” and “ Pottery,” have been found associated in Lincoln- shire and in Romney Marsh—in the former place, it is said in company with Roman fictile vessels. In Herm, he states, that one fragment of true Samian ware was discovered in 1841. All this would seem to point to the Romano-British period, were it not that these same “ Hand-bricks” have been found within more than one cromlech, associated only with stone implements of the rudest description. One such is mentioned by Mr. Lukis in his second paper on the Primeval Antiquities of the Channel Islands, in the 1st vol. of the Archeological Journal. The cromlech re- ferred to was opened by him on the plain of L’Ancresse, in the northern part of Guernsey, in which he states, “He found many pieces of clay, of a peculiar form, from three to six inches in length, made by rolling a piece of clay in the hand, and striking each end against a board, and still bearing the mark of the inside of the fingers and impression of the skin of the maker.” “ With these,” he adds, “were found no vestiges of any metal,” “and the many rude stone implements found with them made it evident there were none then in use.” Hence arise doubts which can only be solved by further investi- gation; and when last I heard from Mr. Lukis, he informed me that he was about shortly to undertake the exploration of a hitherto undisturbed cromlech, in the hopes of finding further evidences to elucidate this intricate subject. In conclusion, I have only to state that I am mainly indebted to Mr. Lukis, and to his published Papers, for any information I may have been able to lay before you this evening, which, under ordinary circumstances, I should hardly have ventured to attempt ; but, as we number amongst us many who are interested in Archeological pursuits, I trust that the novel and peculiar nature 14 of the substances which form the subject of my communication this evening, may be held in some measure to justify me in bringing under your notice a matter, which, though not included within the range of Natural History, yet possesses in itself claims upon the attention and sympathy of the enquiring mind, which can hardly fail to meet with due appreciation amongst the Mem- bers of the Cotteswold Club. W. VY. G. Notes on British Ferns. By James Buckman, F.G.S., F.L.S., Professor of Geology and Botany, in the Royal Agricultural College. A slight acquaintance with plants will shew us that while there are very many that ornament the earth with those showy or curi- ous parts which we term flowers, there are others which do not flower, or at least in the same way, and the differences of these two groups may be summed up in the following manner : 1st, Flowering Plants. Bearing leaves whose modifications form other leaves which are called “floral envelopes”’ (Calyx and Corolla); further change makes (Stamens and Pistils) the latter of which contains the germ and produces seed by its maturation. 2nd, Non-Hlowering Plants, in which is no Calyx or Corolla, and whose sexual organs, if they possess them, are concealed. In the first or higher class of plants detached cells are produced by the Stamen, and known as Pollen ; the contents of the Pollen cell are received into a reservoir of the germ, now full of a saccharine formative fluid, upon which they live and propagate new cells, which become united into different shapes, and covered with varied en- velopes, and so compounded they separate from the parent plant, and in this state are called seeds, the plumule of which consists of young leaves. Seeds, therefore, may be viewed as separable buds, protected in various ways, and wrapped up in the most convenient form. In the Non-flowering plants there are also separable cells deve- loped, but here they are not sown in a sugary pabulum like pollen, but, when separated from the plant, they appear to have the power of reproducing other cells, each of which, in the lower tribes, becomes an independent plant, whilst in the higher the cells do not separate, but make up organs by aggregation, until a distinct organ is set apart for the production of the separable cell, which, 15 in these, is the seed. Hence the reproduction, as shewn in the two great divisions of plants, may be thus summed up: In Flowering Plants. In Non-Flowering Plants. A separable cell is formed. ‘‘ Pollen,” A separable cell becomes the future which is sown in the Pistil, and pro- | Plant, without mediate gestation— duces the embryo of a plant, “Seed,” | warmth, moisture, and surrounding corresponding with the higher orders | media—thus analogous to the produc- of animal life, in which the egg is | tion of animals from eggs. hatched in the parent. : Now it is to the non-flowering plants that the Ferns belong, and inasmuch as they have leafy appendages, whilst the Fungi have not; we hence form two groups of non-flowering plants, or, ACOTYLEDONS. a. Plants without leaves, sometimes forming a kind of crust or Thallus (Thallogens)—Fungi, Lichens, &e. b. Plants with leaves, whose parts modify to produce spores, seed, (Acrogens)—Mosses and Ferns. Native Ferns present the following parts :— A root, more or less fibrous, sometimes springing from an underground stem, Rhizome; this is the true stem of the plant, the which, growing upright, constitutes the tree fern of the tropics. Leaves (Fronds of the Botanist), consisting of a leaf-stem (Stipes), which sending out fibres right and left, covered by ex- pansions of the bark, constitutes the green leaf-matter. The frond may be entire as in the Hartstongue, simply winged as in the common Polypody and Hard Fern, or doubly winged as in the Lady Fern ; the first divisions being termed pinne, the smaller ones pinnule. Fronds of Ferns are distinguished from the leaves of. flowering plants, 1st, by an involute method of growth, the young leaf being rolled over like a shepherd’s crook or pastoral staff. In the compound fronds estivation proceeds as follows :—The frond gradually unfolds lengthwise. Then the pinne unroll. The pinnule follow, and the more or less divided leaf is exposed to view. 2nd, The ramifications of its woody fibre, forming “ leaf veins,” are always in a bifwrcate or fork-veined form. Seeds are the result of the gradual separation of a cell destined for reproduction, and which are thus produced :—1st, The Capsule, which, in some examples, as the Shield Fern, consists of a mem- branous case having a row of cells involuted around it, forming a spring to liberate the sporules. Or the pinnule are metamor- phosed into seed cases, as in the Royal Fern. Bunches of the former are called Sori—the cases of the latter Theca. The number of seeds produced on a single Fern may be esti- mated by the following calculation, arrived at from an examination of the Aspidium Filix Mas, Male or Shield Fern. 16 A capsule contains 20 cells, sporules. A sori consists of 40 capsules. Each pinnule has 6 sori. There are 22 pinnule to each pinne. There are 40 pinne to each frond. There are 8 fronds to each root. Hence 20 X 40 x 6 X 22 X 40 X 8 = 33,792,000. The necessity for the production of so many seeds is explained when we consider that ferns cannot grow everywhere; hence the casualties to which they are liable are amply provided for. The clusters of capsules, in most instances, begin forming be- neath the epidermis, and attach to the nervures on the under side of the frond, the epidermis remaining as a protective covering until the seeds are ripe, when it dries up. The form and disposi- tion of this membrane, which is analogous to the Calyx, differs in different genera and species; it is called an Involucre or Indusiwm. In as far as British Ferns are concerned, we may divide them into genera, depending upon the presence or absence, the disposi- tion, and form of the parts heretofore described. The species being dependent, for the most part, upon the form of the divisions of the frond. The following is a List of the Genera of the British Ferns. 1. Ceterach. 2. Polypodium. . Woodsia. 1. Sori nude. That is, not covered by an Indusium. 3 4, Aspidium. 5. Cystopteris. 6. Aspleniwm. 7. Scolopendrium. 8. Péeris. 9. Cryptogramma. 10. Blechnum. . Adiantum. i . Trichomenes. 1 3. Thecze (Seed vessels) Open (1 18. Hymenophyllum. 1 1 ci cases at the edges of the leaves. Thecx, closed capsules, split- ting by a pore. . Osmunda. . Ophioglossum. 2. Sori, covered by an Indu- sium. 1 2 3 4. Botrychiwm. 5 6 Edwin Baily, Printer, Cirencester. 0b. 2. PULL. la_f, (dans Edwardsn Wreght 2. wc , Bouchardu 5 8.a_c, Hemteidaris minor Agassiz 4.0, Pedina Bakeri Wright D6, , Etheridgiz ‘ 17 Contributions to the Paleontology of Gloucestershire :—A descrip- tion, with Figures, of some new Species of Echinodermata from the Lnas and Oolites. By THomas Wricut, M.D. &c., Pro- at the Natural Sciences in the Cheltenham Grammar chool. Reap 47TH May 1852. Cidaris Edwardsu, Wright. PI. I. fig. 1, af. Test crushed, the form therefore unknown. Ambulacral areas narrow, with two rows of small perforated tubercles, and smaller perforated ones interspersed amongst them ; interam- bulacral areas about four times the width of the ambulacral, having two rows of large tubereles with confluent areolas ; the primary spines long, with a compound structure; the secondary spines short with blunt apices, the surfaces of both sculptured with delicate longitudinal lines ; mouth armed with powerful jaws, each with three prominent tricarinated ridges. Upper part of the test and ovarial disc unknown. Deseription.—It is much to be regretted that no other speci- men of this noble Urchin but the one before us has been ob- tained from the Lias of Gloucestershire, and as the specimen exhibits only the lower half of the test, many points of its ana- tomy remain unknown; enough of its structure, however, is shown to enable us to point out some important affinities and differences in this rare species. The narrow ambulacral areas are provided with two rows of small perforated tubercles, amongst which smaller tubercles are irregularly scattered; these tubercles all support short stout spines with a minutely sculptured surface, and which are abun- dantly preserved in situ on the specimen. The wide poriferous avenues are occupied with large oblong pedal pores with very thin partition-walls between them, a circumstance which forms a good diagnostic character between C. Edwardsii and C. Fowleri, which it very much resembles in many points of structure, the pores in C. Fowleri being small and separated by thick partition- walls. The interambulacral areas are four times the width of the ambulacral, and are occupied by two rows of large tubercles set closely together in a vertical direction, so that the areolas above and below are quite confluent throughout. VOL. Il. ie c 18 Dr. T. Wright on new Species of Echinodermata The imperfect condition of the shell prevents us from ascer- taining the precise number of these tubercles there were in each row, but judging from the number (eight) contained in an im- perfect column, we suppose there could not have been less than from twelve to fourteen; they increase gradually in size from the mouth upwards, and are of a moderate magnitude when compared with the shell they adorn. The areolas are small and not prominent, and the tubercles are deeply perforated. The space between the two rows of tubercles is wide and filled with close-set miliary tubercles, most of which are raised on eleva- tions, and have their summits perforated; these all support small spines, which are well preserved in situ in our specimen. The spines are of two kinds—those articulated with the large tubercles (the primaries), and those articulated with the small tu- bercles (the secondaries). The primary spines exhibit a peculiar structure: the head is large, increasing gradually in diameter from the articulating cavity to the circular band ; the rim of the acetabulum is coarsely and deeply crenulated, and the raised band is prominent, narrow, and finely milled ; the neck tapers gradually from the band to the point where it joms the stem, which has the same structure as the head, and its surface is delicately sculp- tured with fine longitudinal lines; the stem is united to the neck by an oblique harmonia suture. The structure of this part of the spine differs from that of the head and neck; in the spines denuded of their external layer, it has a horny semi- transparent appearance ; in those in which this layer is pre- sent the surface is sculptured with longitudinal lines of micro- scopic delicacy, and there are numerous small processes, having their points directed forwards, arranged with some regularity in rows. The stem is circular or slightly compressed; but as none of the spines are complete, a part having been broken off, we are unable to ascertain their length. The secondary ‘spines are very uniform in size and structure, and are abun- dantly preserved in situ; they measure from ths to ,>ths of an inch in length and are round, and have their surface orna- mented with fine longitudinal limes. The mouth is armed with a powerful dental apparatus: three of the jaws are very promi- nent; the external surface of each is strengthened by three pro- minent ridges; the teeth are large, but are fractured. As the under surface of the test only is shown, we are unable to describe the ovarial dise and the dorsal surface thereof. Affinities and differences—This Urchin belongs to the same group as C. Fowlert and C. maxima, Goldf. It resembles the former in the form and structure of both areas, and in the gra- dual development of the primary tubercles from the mouth upwards. It is distinguished from that species, however, by the from the Lias and Oolites. 19 greater size and uniform perforation of the miliary tubercles, but above all by the form and structure of the primary spines. Having ascertained that our conjecture * relative to the spines of C. Fowleri is correct, from having seen a specimen recently found with some spines attached to it, we can speak positively upon this point. Locality and stratigraphical range—Found by Mr. G. E. Gavey, C.E., in the upper shale beds of the Lower Lias at Mickleton Tunnel near Chipping Campden. It was associated with Pentacrinus Goldfussii, Wright, Ophioderma Gaveyi, Wright, Uraster Gaveyi, Forbes, and Ammonites planicosta, Sow. History.—Isolated plates of this species have been found in beds of the same geological horizon in other localities of the county of Gloucester, but the specimen before us is the only one from which the anatomy of the Urchin could be made out. We dedicate this species to Prof. Milne-Edwards, of the Museum of Natural History at the Jardin des Plantes, Paris, as a tribute of gratitude for the pleasure and profit derived from the study of his admirable monograph on British Fossil Corals. Cidaris Bouchardii, Wright. PI. I. fig. 2, a-c. Test circular, depressed ; ambulacral areas narrow and flexuous ; interambulacral areas with two rows of primary tubercles, 5-6 in each row ; the areolas of the small mammillary eminences deeply excavated, and surrounded by an elevated ridge, on which a distinct circle of granules for each areolar space is disposed. Dimensions of the largest specimen. Height 33ths of an inch, transverse diameter 1 inch and j5ths. Dimensions of a moderate-sized specimen. Height 14ths of an inch, transverse diameter 1 inch and ,%ths. Description.—It was for some time doubted whether the young forms of this Urchin were not the C. elegans, Goldf., but a com- parison of several individuals of our fossil with a typical spe- cimen of Goldfuss’s species, kindly sent us by our friend Dr. Roemer of Bonn, which he had identified with the original C. elegans in the Bonn Museum now under his care, has con- vinced us of their distinctness. The test of our Urchin is circular and much depressed from the great flattening of both poles ; the ambulacral areas are narrow and slightly flexuous, and have two rows of small marginal granules set nearly op- posite to each other throughout the areas. The poriferous avenues are much depressed, and the pairs of pedal pores are * Annals of Nat. Hist. Oct. 1851. c2 20 Dr. T. Wright on new Species of Echinodermata disposed in a single file. The interambulacral areas are about five times the width of the ambulacral, and have two rows of primary tubercles of moderate size, with from five to six in each row. The mammillary eminences on which the tubercles are supported are surrounded by areolas deeply excavated out of the substance of the test plates ; the margin bounding the areolas is raised into a ridge on which a distinct row of close-set granules is disposed, so that each tubercle is thereby separated from its fellow; the elevation of the marginal ridges produces a zigzag depression down the centre of the areas, which is covered with a small close-set granulation. The mouth-opening is small and circular, and lies in a slight depression; the apical dise is absent in all the specimens that have yet been found. The crenulations on the mamme are small, but distinct, and the tubercles are of moderate size and not deeply perforated. Affinities and differences.—This Urchin has many affinities with C. coronata, Goldf., and C. propinqua, Minst., and has been cata- logued as the former by some authors ; it is therefore important that we should point out the diagnostic characters by which it is distinguished from them. In both these corallian forms the am- bulacral areas have four rows of granules, whilst in C. Bouchardi there are only two rows. From C. propinqua and C. coronata it is further distinguished by having more rows of primary tubercles in the interambulacral areas, in having the areolas smaller and more deeply sunk, the tubercles proportionately smaller, and the marginal circle of granules smaller and set closer together. With C. marginata, Goldf., it has some affinity in the excavated style of its areolar spaces, but it is distinguished from this beautiful form in having the tubercles smaller and more numerous. In C. marginata the ambulacral areas moreover are broader and more prominent, and they support four rows of small granules, whilst in C. Bouchardii there are only two. With C. elegans,Goldf., it has no resemblance whatever ; it belongs there- fore to a different group of Cidarites than these foreign corallian forms. From C. Fowleri, nobis, it is distinguished by having narrower and more deeply concealed poriferous avenues, fewer . primary tubercles in the interambulacral areas, and deeper exca- vated areolar spaces with a more elevated marginal rim around them: these characters serve to distinguish C. Fowleri from C. Bouchardii at a glance, and the same diagnostic traits separate it from C. Edwardsii, nobis. Locality and stratigraphical range.—We have found this spe- cies in the Pea-grit of the Inferior Oolite of Crickley, Leck- hampton, and Birdlip Hills, Gloucestershire, but have never met with any traces of it in the Upper Ragstone beds so rich in Urchin forms. Some separate plates collected from the Bradford from the Lias and Oolites. 21 clay near the Tetbury Road Station, Great Western Railway, closely resemble this form ; but as no entire specimen, that we are aware of, has been found, it is impossible to state whether it has a wider range in the higher beds of the lower division of the Oolites or not. We dedicate this species to our friend M. Bouchard Chantereaux of Boulogne, to whom we are indebted for some beautiful and rare specimens of Echinoderms and other fossils from the rocks of the Boulonnais, most kindly contributed by him to aid us in the composition of these memoirs. Hemicidaris minor, Agassiz. PI. I. fig. 3, a-c. Syn. Hemicidaris minor, Agassiz, Catalogus Systematicus, p. 9; Agassiz and Desor’s Catalogue raisonné des Echinides, Annales des Sci. Nat. tom. vi. p. 339. Acrosalenia rarispina, M‘Coy, Aun. of Nat. Hist. 2nd Series, vol. ii. p- 411. Test hemispherical above, flat at the base; ambulacral areas slightly flexuous, not prominent, with six large tubercles at their base, and four rows of small unequal-sized granules in the middle, diminishing to two rows in the upper part of the areas ; interambulacral areas three times the width of the am- bulacral, with three primary tubercles on the upper surface and three smaller ones at the base ; the wide intertubercular spaces are covered with small distinct nearly equal-sized gra- nules, which form complete circles around the margins of the areolas of the primary tubercles ; the apical disc is of mode- rate size, and its ovarial plates are covered with a delicate gra- nulation; base flat, mouth-opening large and decagonal ; pores arranged in the avenues in a single file throughout. Height ,6,ths of an inch, transverse diameter Zyths of an inch. Description.—This beautiful little Urchin was first discovered in the étage Bathonien of Langrune, Calvados, the true equiva- lent of the Great Oolite of English geologists; it was entered in M. Agassiz’s ‘ Catalogus Systematicus*’ as Hemicidaris minor, from specimens sent to him by M. Michelin ; it afterwards found a place in the ‘ Catalogue raisonné des Echinides’ of Agassiz and Desor, accompanied with this remark : “ Se distingue entre tous les Hemicidaris par les tubercules trés espacés, dont il n’y a que deux ou trois dans une rangée.—Terrain Jurassique de France.— Michelin.” Professor M‘Coy, in his paper “On some new Me- sozoic Radiata+,” afterwards described this Urchin under the * Catalogus Systematicus Ectyporum Echinoderm. Foss. Mus. Neoco- mensis, 1840. : . °: + Annals of Natural History, Qnd Series, vol. ii. p. 411. 22 Dr. T. Wright on new Species of Echinodermata name Acrosalenia rarispina, giving the Great Oolite of Minchin- hampton for its locality. As that gentleman has kindly favoured us with pen-and-ink sketches of the species described as new in that paper, we have no difficulty in deciding on the identity of his specimen. Moreover we have ascertained the collection from whence it originally came. The error committed by this learned author in the genus must have arisen from the disc in his spe- cimen having been covered with “adhering siliceous matrix,” and from his having overlooked the very remarkable character pointed out by Agassiz, “les tubercules trés espacés.” We have been fortunate to receive a typical specimen of the original spe- cies from the Great Oolite of Langrune, through the kindness of our friend Professor Deslongchamps ; we have compared the French Urchin with specimens obtained from the same locality as that from whence Prof. M‘Coy’s was collected, and there is not a shadow of a doubt about their perfect identity. We have figured in detail this beautiful and singular form, to prevent the possibility of mistakes occurring about it in future. This pretty little Hemicidaris is very distinct from all others of the group to which it belongs: the test is nearly hemispherical, and the few primary tubercles stand prominently at great di- stances apart from the surface of the test. The narrow ambulacral areas are slightly flexuous above, and have from four to six large perforated tubercles at their base only, the sides and upper part of the areas having first four, and then two rows of small imper- forate granules upon their surface about equal in size to the gra- nulation which covers other parts of the test. The poriferous avenues are cepressed, and the pedal pores are disposed in pairs throughout. The interambulacral areas depart considerably from the typical structure of this portion of the test in other Echinide ; they are three times the width of the ambulacra, and have at their base three large primary tubercles, two on one side and one on the other, with a smaller tubercle above the single large one ; on the sides and upper part of the areas there are only three primary tubercles, two on one side and one on the other, making only three pairs of primary tubercles in the interambulacral areas, those of the base being closely set together, and those on the sides at great distances apart ; the tubercles are large and hemi- spherical and only slightly perforated ; the mammillary eminences which support them are small and ring-like with faintly marked crenulations, and the areolas are rather wide and only slightly grooved, so that the tubercles project prominently and abruptly from the surface of the test. The margin of the areolas is en- circled by a row of granules rather larger than those which cover the rest of the intertubercular surface of the plates; here the granules are close-set and disposed without much regularity. Vol.2. PLL” Hithay ha deeeenee Wy Printed by Hullnandel & Walton. , Acrosalenia crinifera Wreght Diadema. Davidsoni : WwW, Moorei ' , Polyeyphus Deslongchampsei ; DAD, Nuceleolites Woodwardi1 , Michelin v hy from the Lias and Oolites. 23 The apical disc is of moderate size and slightly prominent ; the five ovarial plates are large and of a heptagonal form, the ocular plates are small and heart-shaped, and the surface of both is covered with a close-set delicate granulation ; the anal opening is nearly central and circular; the base is flat; the mouth- opening is large and widely decagonal from the great span of the ambulacral arches, and the comparative smallness of those of the interambulacra. The spines are as yet unknown. Affinities and differences.—This remarkable little Urchin is so entirely different from its congeners, that it is impossible to mistake it for any other of the group to which it belongs. The presence of tubercles at the base of the ambulacral areas only, and of granules on the sides of these spaces, associate it with H. diademata, but the small number of the primary tubercles on the interambulacra, added to the great distance at which they are placed apart, serve to distinguish it from the young of that spe- cies; in fact, these characters alone are perfectly diagnostic of H. minor among all other forms of Hemicidaris. Locality and stratigraphical range.—It was first found in the “ Grand Oolite” of Langrune, Calvados, from whence the beau- tiful specimen before us was obtained, and kindly sent by Pro- fessor Deslongchamps of Caen. We take the present opportunity of recording our grateful acknowledgements to that emment na- turalist for his kindness and courtesy, not only in contributing specimens to our cabinet for comparison and reference, but likewise for communicating many rare species of oolitic Echi- nidz which served as the types of several of M. Agassiz’s spe- cies, and which specimens have been of much service in clear- ing up doubts as to the identity of some other English forms. H. minor was collected in this country by W. Walton, Esq., from the Great Oolite of Hampton near Bath. History. First named by M. Agassiz from specimens in M. Michelin’s cabinet ; afterwards described as Acrosalenia rari- spina by Prof. M‘Coy from specimens in the Cambridge Museum, which came from Mr. Walton’s series collected near Bath ; it has never yet been found either by Mr. Lycett or ourselves in the Great Oolite of Minchinhampton. Acrosalenia crinifera, Wright. PI. II. fig. 1, a—d. Syn. Echinus minutus, Buckman, Geology of Cheltenham, 2nd ed. . 95. Cidarites criniferus, Quenstedt, Handbuch der Petrefactenkunde, tab. 49. fig: 32. p. 574. Test circular, depressed ; ambulacral areas narrow, with two rows of microscopic tubercles placed at some distance apart on each 24 Dr. T. Wright on new Species of Echinodermata side of the areas, those of the right side alternating with those of the left ; interambulacral areas with two rows of primary tubercles, 9-10 in each row, so disposed that the test appears to possess only ten rows of primary tubercles nearly equidistant from each other ; spines long, numerous and hair-like. Height ,5,ths of an inch, transverse diameter z%ths of an inch. Description.—This singular little Urchin has been long known to collectors, and has been often a puzzle to them, for although a few specimens have been collected in a tolerable state of pre- servation, still for the most part the test is much injured by pyrites ; under the most favourable circumstances, it requires a good lens and much patient study to make out the details of its structure. It was first found in the black shales of the lower Lias near this town, and recently, with its hair-like spines at- tached to the test, from the same bed near Gloucester, when ex- cavating the new docks of that city ; it was there associated with Ammonites oxynotus, Quenst. It is difficult to say whether this tiny Urchin is a Hemicidaris or an Acrosalenia, and the absence of the apical disc leaves the question unsolved ; we incline to the opinion that it is an Acrosalenia from the structure of the am- bulacral areas, the shape, length and development of the spines when compared with the diameter of the test, the spines being more than four times the diameter of the latter ; be this however as it may, it is neither an Echinus nor a Cidaris, as previous authors have supposed. The ambulacral areas are narrow, with two rows of small marginal tubercles not much larger than the common granulation of the test; these tubercles are placed im each row at some distance apart, and the tubercles of the one side alternate with those of the opposite side ; between these rows of tubercles the surface of the plates is adorned with a delicate granulation, which is arranged into a zigzag line; the tubercles are very uniform in size and distribution throughout the areas, and do not increase at the base thereof, as is the case in the ge- nus Hemicidaris. The interambulacral areas are wide, and have two rows of primary tubercles, from 9-10 in each row; their mammillary eminences have well-defined areolas, the summits of the mamme are deeply crenulated, and the tubercles are small and widely perforated ; the areolas are confluent above and be- low ; between the two rows of tubercles an elevated band extends from the mouth to the apical disc, composed of from 4—6 rows of unequal-sized granules. When viewed at the equator with the naked eye, this Urchin appears to possess only ten rows of tubercles placed nearly equidistant from each other ; but when examined with an inch object-glass under the microscope its true structure is disclosed,—the narrowness of the ambulacral — ST from the Lias and Oolites. 25 areas, the closeness and smallness of their rows of tubercles, the granular band down the centre of the interambulacra, and the unequal size of its component tubercles, alike contribute to make the deception almost complete. The most remarkable parts of the structure of this tiny fossil are the spines, which in some crushed specimens are preserved in situ; they are long, delicate and hair-like, and have large articular heads; these spines look like so many bristles laid down in all directions upon some slabs of the Lias shales ; in a crushed test of four-tenths of an inch in diameter the spines measured an inch and a half in length. Affinities and differences.—The only Cidarites for which A. cri- nifera is likely to be mistaken are Diadema Moorei and Pedina Etheridgii ; from the former it is easily distinguished by the nar- rowness of the ambulacral areas and the smallness of the tubercles thereof ; from the latter it differs in the comparative smallness of its ambulacral areas, and above all in having the mammillary eminences of its tubercles deeply crenulated, a character which is absent in all the Pedinas we know; at present we know of no other Urchin in the Lias for which it can be mistaken. Locality and stratigraphical range.—A. crinifera has been found only in the lower shales of the lower Lias near Lans- downe, Cheltenham, and in the same stratum near Gloucester ; it is associated wtth Turrilites Valdani, D’Orbig., and Ammonites oxynotus, Quenstedt. It has been collected by Prof. Quenstedt in the lowest schist of the “ Posidonienschiefer von Pliensbach bei Boll” in Wiirtemberg. We have before us now two slabs of this curious bed ; one surface of the slab is covered over with the long hair-like spines strewed about in all directions, with here and there the crushed test of one of these Urchins with its spines attached and in sitw. History.—Described by Mr. Buckman under the name Echinus minutus, but previously noticed by M. Quenstedt in his work on the Fleetzgebirge of Wiirtemberg ; it has been recently figured by him in his ‘ Handbuch der Petrefactenkunde,’ under the name Cidarites criniferus. Diadema Davidsoni, Wright. PI. II. fig. 2, a-e. Test depressed, circular; tubercles elevated upon prominent mammillary eminences; pores in a single file throughout; a few small secondary tubercles in the interambulacra ; the pri- mary ambulacral tubercles nearly as large as those of the interambulacra. Height ,%ths of an inch, transverse diameter 1 inch and {6 ths. Description.—This beautiful Urchin has a regular circular 26 Dr. T. Wright on new Species of Echinodermata test, not at all inclined to the pentagonal form of many of its oolitic congeners. The ambulacral areas are three-fourths the width of the interambulacral areas, and are nearly of a uniform width throughout, tapering slightly and gracefully wards to- wards their superior third; the contraction assumes the form of a gentle curve slightly inclined towards the centre. The double row of tubercles gradually increases in size from the mouth to the equator, where three pairs are about the same size ; from this point upwards they gradually decrease, and terminate in two pairs of minute rudimentary tubercles at the disc. A single row of granules, arranged in a zigzag form, separates the primary tubercles from each other, a larger granule marking each of the angles. There is no granulation or other sculpture be- tween the mammillary eminences of the tubercles and the pori- riferous avenues. There are from twelve to thirteen pairs of tubercles in each area. The interambulacral areas are nearly ;‘sths of an inch in width, and 4th wider than the ambulacral areas; they retain their width uniformly throughout, and are occupied by two rows of primary tubercles, nine to ten in a row, the mammillary eminences of which are large and prominent, and separated from each other by two rows of small granules which extend only a short distance beyond the equator ; the remaining space between their termination and the dise being destitute of sculpture, where likewise the areas are slightly de- pressed ; and a single row of granules rises on the external side of the tubercles, with here and there a secondary tubercle towards the basal portion of the test. The poriferous avenues are very narrow: the pedal pores are arranged in a single file, only three or four additional pairs being introduced in the increased spaces around the circumference of the mouth. The tubercles of both areas are of moderate size, but exceedingly prominent, in consequence of being elevated upon large. mammillary eminences, the apices of which are deeply cre- nulated. The tubercles of the ambulacral areas at the equator are not much less than those of the interambulacral areas, but upon the upper surface of the test they become much smaller and more numerous, The mouth is decagonal and of moderate size: the arches over the bases of the ambulacral areas are about one-third greater in span than those across the interambulacra. The disc is absent in all the specimens, four in number, that we have seen. Affinities and differences.—This species resembles Cidarites (Diadema) mamillanus, Roemer, in the prominence of the tuber- cles and depression of the test ; but Roemer’s figure* is so indi- Ms Versteinerungen des Norddeutschen Oolithen Gebirges, pl. 2. fig. 1. Srom the Lias and Oolites. 27 stinct and devoid of details, that it is impossible to institute a strict comparison between our Urchin and the one figured by him. The difference between D. Davidsoni and D. subangulare is so marked that it is impossible to mistake them—the penta- gonal outline, large tubercles, wide granulated space between the primary tubercles of both areas, with the pores arranged in double files on the upper surface of the test, form a group of characters which distinguish D. subangulare from our Urchin. From D. pseudodiadema it is distinguished by the tubercles in D. Davidsoni of the ambulacral equalling in size those of the interambulacral areas, whilst in that species they are unequal. The rudimentary condition of the secondary tubercles in our species forms a striking contrast to the size they attain in D. pseudodiadema. The naked condition of the central parts of the interambulacral areas connects it with D. subnudum, Ag., of the Chalk, and the neatness of its outline allies it with other cre- taceous forms. Locality and stratigraphical.range-—We have collected this species in the clays of the Coral rag near Calne, Wilts; it is a very rare Urchin, as we only know four specimens of it. We dedicate this species to our friend Thomas Davidson, Esq., whose learned monographs on the Brachiopoda have earned him the gratitude of all paleontologists. We take this opportunity likewise of recording our deep obligations to Mr. Davidson for many friendly acts of assistance given during the preparation of these memoirs, by which we have been enabled to compare a con- siderable number of foreign Echimide with those of our own island, and thereby have been enabled to obtain a better know- ledge of the affinities existing among the Echinoderms of the European Oolitic fauna. Diadema Moorei, Wright. PI. II. fig. 3, a—d. Test circular, depressed ; ambulacral tubercles smaller than those of the interambulacral areas ; plates of the test covered with a small wide-set prominent granulation ; mouth large and deca- gonal; anal opening large ; apical disc of moderate size. Height ,°,ths of an inch, transverse diameter 42ths of an inch. Description.—There is much difficulty in distinguishing some of the smaller Diademas from each other, inasmuch as the young condition of many of the larger species so closely resembles the adult state of others, that it is only after one obtains a number of individuals of different species in their various phases of growth, that the naturalist feels himself upon sure ground when he endeavours to distinguish the affinities and differences that exist among them. ~ 28 ‘Dr. T. Wright on new Species of Echinodermata After a diligent search for Urchins in the Lias of Glouces- tershire, we have succeeded in collecting only a very few examples of this group from these rocks. In addition to those found here, our friend Mr. Moore of Ilminster kindly presented us with a few specimens which he collected from the Upper Lias near Ilminster, and from these collective materials the species under consider- ation was discovered. Diadema Moorei has a circular outline slightly inclining to a pentagonal contour ; it is much depressed at the upper surface and is flattened at the base. The ambu- lacral areas are very narrow, being less than one-third the width of the interambulacral ; their margins are occupied by two rows of tubercles about eight in each row, which, at the base and up to the equator, are nearly as large as those of the interambulacra ; but from that region to the apex of the area they rapidly dimi- nish in size, and are here very disproportionate in magnitude to them ; a zigzag line of single granulation separates the two rows of tubercles from each other. The interambulacral areas are wide and well developed, and have two rows of tubercles, from 8-9 in each row, which occupy the centre of the plates; the areolas of the tubercles on the upper surface are surrounded with a circle of granules which separates them from each other, but those of the base are confluent above and below. The inter- tubercular surface at the base of the test has a number of gra- nules scattered over it, whilst on the upper surface, the plates are destitute of any other ornament beyond the faint circles that surround the tubercles. The pedal pores are arranged in pairs in a single file; the avenues are, however, rather flexuous be- low; the basal tubercles of both areas are nearly alike in size, but on the dorsal surface those of the ambulacra dwindle into large granules, whilst those of the interambulacra maintain their size up to the last pair, which are small near the margin of the disc. The mouth-opening is large, and its margin is divided into ten nearly equal-sized lobes. The apical disc is partly pre- served in the specimen here figured ; it consists of five large ovarial plates of a heptagonal form ; two of the sides unite with the in- terambulacral plates, two with the ocular, two with the adjoin- ing ovarials, and the single surface contributes to form the boundary of the anal opening, which is of moderate size; the five ocular plates are small and heart-shaped, their apex is di- rected towards the anal opening, and their base to the area ; the madreporiform tubercle is slightly elevated on the single ovarial plate, and the surface of the discal plates is almost destitute of sculpture or granulation. Affinities and differences.— D. Moorei resembles D. depressum, Ag., in the depression of its upper surface and the flatness of its base, likewise in having the tubercles of both areas of nearly a — = from the Lias and Oolites. 29 uniform size around the base; but it is readily distinguished from D. depressum by the number and greater development of the tubercles of the ambulacra, which maintain their size throughout ; whilst in D. Moorei the ambulacral tubercles are fewer in num- ber and rudimentary in size in all the upper part of the areas. The contour of the test moreover does not assume the penta- gonal outline of D. depressum, nor has the upper surface of the interambulacral areas the median depression seen on the test of the latter. The mouth-opening is larger, and the decagonal lobes are more equal in size in D. Mooret than in D. depressum. Locality and stratigraphical range-—We have collected D. Moorei in the Upper Lias of Gloucestershire. Mr. Moore found it in the same stratum near Ilminster with Ammonites communis and A. serpentinus. Professor Deslongchamps has communicated a specimen of this Urchin which he found in the Lias supérieure of May, Calvados, associated with Leptena Davidsoni and The- cidea Bouchardii and several other species. We dedicate this species to Mr. Moore, of Ilminster, whose assiduous researches have brought to light so many interesting forms from the Upper Liassic beds of Somersetshire. Genus Pepina, Agassiz. As this genus was incorrectly defined in our memoir on the Cidaridee, it having been there stated that the mammillary emi- nences were “ crenulated like those of Diadema,” we take this opportunity of correcting the error, and giving a definition more in accordance with our present knowledge. Test thin, circular, more or less depressed ; primary tubercles small and perforated ; mammillary eminences with smooth ring- like summits without crenulations ; pores in general disposed in triple oblique pairs; mouth small and slightly decagonal, mar- gin not much notched; ovarial disc small and not prominent ; ambulacral areas with one, two, or more rows of small tuber- cles ; interambulacral areas sometimes with two rows only, some- times with two rows and additional secondary rows of tubercles more or less complete. This genus is extinct, and is found in the oolitic cretaceous rocks. Pedina Bakeri, Wright. PI. 1. fig. 4, a-c. Test circular, depressed ; ambulacral areas narrow, with one row of small tubercles disposed in a slightly zigzag line down the centre of the areas ; interambulacral areas broad, with two rows of primary tubercles raised on prominent mammillary emi- 30 Dr. T. Wright on new Species of Echinodermata nences in the centre of the plates; the margins of the areolas surrounded with circles of small granules ; no second- ary tubercles. Height {ths of an inch, transverse diameter }3ths of an inch. Description.—This Pedina presents a different form from its other congeners: the test is circular and depressed ; the ambu- lacral areas are narrow, about one-third the width of the inter- ambulacra; the usual double row of tubercles in this region is reduced to one row, the tubercles of which are disposed alter- nately on the right and left sides of the areas, thereby forming a single zigzag line down the centre thereof; the tubercles at the equator and on the upper surface are small, but there are two or three of a larger size at the base of the areas ; a few gra- nules form imperfect crescents round their narrow areolas. The interambulacral areas are nearly three times the width of the ambulacra ; they are adorned with five pairs of primary tuber- cles of nearly a uniform size throughout, which are raised on prominent mammillary eminences, the summits of which are smooth, ring-like and without crenulations ; circles of small gra- nules bound the areolar spaces ; there are no secondary tubercles, nor any sculpture upon the intertubercular surface of the plates, so that down the centre of the areas there is a smooth valley between the primary tubercles. The apical disc is well preserved in our specimen ; the ovarial plates are of an irregular octagonal form and of moderate size, they are covered with a few granules scattered irregularly over their surface ; the ocular plates are of a rhomboidal form and have large eye-holes. The base of the specimen is covered up with hard rock, so that it is impossible to expose the mouth-opening without endangering the specimen. Affinities and differences.—The Pedine have been so imper- fectly described by M. Agassiz in his ‘ Descriptions des Echi- nodermes fossiles de la Suisse,’ that there is much difficulty in making out the species figured and described in that monograph. When it is recollected how limited were the materials at Agassiz’s command when he published that valuable contribution to Paleontology, and how delicate the test of this genus is, we can readily understand how so many different forms of the same Urchin came to be described and named as distinct species. After a careful examination of many specimens, we confess that Pedina aspera, rotata, ornata and sublevis, Agass., appear to us to be so many different forms of one and the same species. We have before us likewise the original type specimen of P. granu- losa, Ag., which has been kindly communicated by Professor Des- longchamps. An examination of that Urchin has convinced us from the Lias and Oolites. 31 that it is only a larger individual of P. aspera, as we find it in the Inferior Oolite, and is identical with the fossil which we have described as P. rotata. Ona further examination of this specimen, M. Agassiz, it would appear, had arrived at a similar conclusion, for on the ticket which accompanies it is the follow- ing remark in his handwriting :—“ Pedina granulosa, Ag. C’est sous ce nom que cette espéce est citée dans mon catalogue ; ce- pendant il se pourrait qu’elle ne fut qu’une variété un peu enflée de mon P. aspera.”’ This species was collected by Prof. Deslong- champs from the Great Oolite of Ranville. We have likewise before us a portion of Pedina collected from the Oxford clay of the Boulonnais by M. Bouchard-Chantereaux, and marked by that eminent paleontologist, who kindly sent us the specimen, “trés rare. J’en ai encore trouvé que trois morceaux de cette espéce.” It so nearly resembles the Ranville Urchin that we have no doubt of their identity. By the extreme kindness of M. Michelin and M. de Loriére, we have before us specimens of P. Gervillii, Ag., from the Kellovien étage of Chauffour, depart- ment of the Sarthe, which are identical with Pedina aspera or rotata, collected by us from the upper beds of the Inferior Oolite of Gloucestershire. In fact the French and English specimens are so entirely alike, that we should mistake the one for the other had we not previously marked them. It would appear from these remarks, that whether we retain the specific name rotata or aspera for this widely distributed Urchin, we must at least cancel the other names which have been given to various forms of the same, as we have now before us well-preserved specimens from the Inferior Oolite, Gloucestershire, the Great Oolite, Ranville, Cal- vados, the Oxford clay near Boulogne, Pas de Calais, the Kello- vien of Chauffour, Sarthe. [Since these sheets were sent to press, the Rev. A. W. Gries- bach has communicated a Pedina, collected by him in the Corn- brash at Rushden, Northamptonshire; as this fossil is in a good state of preservation, we have been able to make a careful ‘comparison of it with a fine P. aspera now before us, and there can be no doubt of their identity. The discovery of this Urchin in the Cornbrash is another link in the chain of evidence showing the wide stratigraphical range of this form in the Oolitic seas.] P. Bakeri differs so entirely from the forms named in the pre- ceeding remarks, that it is impossible to mistake it for either of them; its diagnostic characters consist of the size and small number of the primary tubercles, the absence of secondary tubercles, the scanty granulation on the interambulacral areas, the narrowness of the ambulacra, and the single row of tubercles thereon. We have only met with the small but tolerably per- fect specimen of this species figured (Pl. I. fig. 4, a—c). 32 Dr. T. Wright on new Species of Echinodermata Locality and stratigraphical range-—We collected this rare form of Pedina from the Pea-grit of Crickley Hill, and have seen fragments of its test in the same bed at Leckhampton, but never in any other locality. We dedicate this species to our friend T. Barwick L. Baker, Esq., of Hardwicke Court, the President of the Cotteswold Natu- ralists’ Club, for the warm interest he takes in the progress of the Paleontology of Gloucestershire. Pedina Etheridgii, Wright. PI. I. fig. 5, a—d. Test circular, depressed ; ambulacral areas with from six to eight small perforate tubercles at their base, and a double row of small granules on their upper surface; the interambulacral areas with primary tubercles only, the areolas of which are surrounded with regular circles of granules; pedal pores not. numerous, arranged in nearly a single file with a slight ele- vation between the two pores of each pair; apical disc large ; ovarial plates leaf-like ; mouth-opening small. Height ;3,ths of an inch, transverse diameter 2ths of an inch. Description.—This pretty little Urchin has a circular outline in the young state, which in larger specimens inclines towards a pentagonal form; the base is flattened, and the upper surface of the test is much depressed. The ambulacral areas are narrow, and have from six to eight small perforated tubercles at their base, and a double row of from twelve to fourteen minute imper- forate granules in each row on their upper surface, which in figure and size resemble those covering the other parts of the test ; between the pedal pores of each pair is a small elevation ; these collectively form a prominent moniliform line which ex- tends from the margin of the disc to the mouth-opening; the pores are disposed in nearly a single file, and do not form the triple oblique pairs which we observe in the larger Pedine. The interambulacral areas are about twice the width of the ambu- lacra ; the rows of primary tubercles occupying the centre of the plates have seven tubercles in each row, they are small in size and are rendered prominent from being raised upon uncrenu- lated mammillary eminences, the bases of which are sharply de- fined and surrounded by complete circles of moderately sized and regularly arranged granules; the regular disposition of these granulations gives an air of decoration to this little species not observed among other congeneric forms; the entire absence of secondary tubercles from the areas renders the decoration more complete. The apical disc is large ; the ovarial plates are widely rhomboidal, the oculars are small and heart-shaped, and the sur- from the Lias and Oolites. 33 face of both is covered with minute granules nearly as large as those which adorn the other parts of the test. The madrepori- form tubercle makes a distinct elevation on the surface of the single plate, and the anal aperture is transversely oblong; the base is flat, the mouth-opening is small, and its margin is divided into ten nearly equal-sized lobes ; the spines are unknown. Affinities and differences.—In its general outline and depressed upper surface, with the pedal pores in nearly a single file, this little Urchin resembles a Diadema ; from that group however it is distinguished by the rudimentary condition of the ambulacral tubercles, and the absence of crenulations from the summits of the mammillary eminences. It is distinguished from P. Bakeri by having small primary tubercles set more closely together, and in having a greater number in each row. From P. aspera it is known by having the upper surface more depressed, the pedal pores separated by a moniliform line of granules, and in the absence of secondary tubercles. It has a strong resemblance at a first glance to Diadema Moorei, but an examination with the lens at once discloses the points of difference, which are these :— the ambulacral areas in Pedina Etheridgu have imperforate gra- nules on their upper parts, whilst in Diadema Moorei there are perforated tubercles; the moniliform line between the pedal pores in P. Etheridgit is absent in D. Moorei; the mouth- opening is likewise much smaller in P. Etheridgii than it is in D. Moorei. Locality and stratigraphical range-—P. Etheridgii has been collected from the marlstone of Bredon Hill, Gloucestershire. Mr. Moore found it in the Upper Lias of Ilminster, and we have collected several specimens from the Pea-grit (Inferior Oolite) of Crickley and Leckhampton Hills, but have never seen a trace of this species in any of the upper beds ; it seems there- fore to have a limited vertical range betaveen the marlstone and the basement-beds of the Inferior Oolite, and is one of the few species which lived in the Liassic and Oolitic seas. We dedicate this species to our friend Mr. Etheridge, of the Bristol Museum, who has kindly assisted us in comparing our specimens with the fine series of Echinoderms under his care, and has likewise otherwise aided us in the most friendly manner in working out the subjects of these memoirs. Genus Potycyruvus, Agassiz. Small Urchins having a subglobular form ; the upper surface of the test is covered with numerous small imperforate tubercles of a very uniform size; the base and basal angle are furnished with several tubercles of a size disproportionately large when com- pared with those of the upper surface ; the pedal pores are dis. VOL. II. D 34 Dr. T. Wright on new Species of Echinodermata posed in a triple oblique series of pairs ; the mouth is large and pentagonal ; the anal plates form a narrow prominent ring at the vertex, and the interambulacral areas are in general divided by a median depression. Polycyphus nodulosus, Minster. Syn. Echinus nodulosus, Goldfuss, Petrefact. Ger. tab. 40. fig. 16 ; Agassiz, Cat. Syst. p. 12. Arbacia nodulosa, Agass. Prodrom. Polycyphus nodulosus, Agass. & Desor’s Cat. raisonné, Ann. Scien. Nat. tome vi. p. 361. Test hemispherical ; ambulacral areas a little more prominent than the interambulacral areas ; ambulacra with from four to five rows, and interambulacra with from twelve to fourteen rows of small tubercles disposed in nearly parallel lines ; bases of the ambulacra with twelve, those of the interambulacra with sixteen larger tubercles. Height 7,ths of an inch, diameter 33ths of an inch. This pretty little Urchin was first described by Prof. Goldfuss from specimens named by Count Miinster from the Oolites of Baireuth ; the hemispherical test exhibits a disposition to assume a subpentagonal circumference from the greater prominence of the ambulacral areas; the surface of the test is divided into fifteen nearly equal lobes by the ten poriferous avenues, and the five depressions which divide the interambulacra down their mesial lines ; these lobular divisions are more defined in young and small specimens than in large and old ones; the ambulacral areas are one half the width of the imterambulacral, and have nine large tubercles at their base, and four or five rows of small tubercles at their widest part, which gradually diminish to three, two and one as we approach the apex of the area ; the interam- bulacral areas are twice the width of the ambulacral, they have about twenty-four large tubercles at their base, and about twelve rows of small tubercles at their widest part, which gradually diminish by the disappearance of the external rows to ten, eight, six, four and two, as we trace the rows from the equator to the apex of the areas; the tubercles on the sides and upper surface of the test are nearly of a uniform size, they are arranged in rows, the tubercles are opposite each other and do not alternate as in some other genera. The interambulacral areas are each di- vided by a slightly depressed line into two lobes ; these are sepa- rated from the ambulaeral areas by straight narrow poriferous avenues, so that the test of this beautiful Urchin appears to con- sist of fifteen nearly equal lobes, those of the ambulacra being the most prominent and best defined, in consequence of the from the Lias and Oolites. 35 depth of the poriferous avenues being greater than the suleus which divides the interambulacra. The mouth is large and decagonal, and lies in a concave depression in the base, surrounded by the larger tubercles which occupy this region of the test. The ovarial plates are small, and form a rather prominent ring around the anal open- ing; the eye-plates are small, but in some of the foreign indivi- duals now before me the eye-holes are very distinct. Affinities and differences.—This Urchin resembles Arbacia Forbesii, but may be distinguished from that species by having the ambulacral areas proportionately wider, the tubercles larger and opposite to each other, and the poriferous avenues having the pedal holes in triple oblique pairs; it belongs moreover to a newer rock of the Oolitic series. Locality and stratigraphical range-—We know only one English specimen of this species, which was found in the Cornbrash by Mr. Buy near Sutton Benger, Wilts; on the continent it occurs in the Baireuthian Jurakalke, where it was found by Count Min- ster. It has been collected from the Great Oolite of Langrune by Prof. Deslongchamps and M. Tesson, and from the Calcaire a polypiers at Ranville by M. Michelin. We beg to record to each of these gentlemen our best thanks for the beautiful series of type specimens of this Urchin with which they have so liberally supplied us. History.—Figured and described for the first time by Gold- fuss. We are not aware that any detailed description of the spe- cies has been given before, with the exception of the very brief one contained in the ‘ Petrefacta Germaniz.’ Polycyphus Deslongchampsii, Wright. PI. I. fig. 4, a-e. Test hemispherical, circumference circular ; ambulacral areas with two rows of larger and two rows of smaller tubercles ; interambulacral areas with two rows of larger and several rows of smaller tubercles ; the small tubercles in both areas often degenerating into mere granulations ; basal tubercles large and prominent. Height ,/,ths of an inch, transverse diameter 15ths of an inch. Description —Amongst the many beautiful forms of Urchin structure, this pretty little species will bear comparison for neat- ness and symmetry with any of the family to which it belongs. We found the first specimen about eighteen months ago, and since then have added an interesting series to our collection. It must be a rare form, as only two or three specimens have been obtained besides those collected by ourselves. - The ambulacral areas are one half the width of the interambulacral, and have one row of D2 36 Dr. T. Wright on new Species of Echinodermata tubercles on each side of the margins of the area, between these are several rows of small granulations arranged without much order; at the base of the area ten larger tubercles are disposed in pairs, the tubercles on the right side alternating with those on the left; the interambulacral areas are about twice the width of the ambulacral ; a single row of tubercles occupies the centre of each of the two columns of plates, and numerous smaller tubercles degenerating into mere granules cluster around the base of the large tubercles; a second row of tubercles extends upwards from the basal angle towards the equator, where it ter- minates ; the basal tubercles consisting of about six pair occupy all the base of the area—they are about the same size as those of the ambulacra, but are arranged somewhat less regularly. The median depression in the centre of the interambulacra is very well marked in this species, so that the test has the appear- ance of being divided into fifteen lobes. The anal plates form a promment narrow ring around the oblong anal opening, and the eye-plates are closely soldered to them ; the eye-holes are very distinct mm most of our specimens. The mouth-openmg is of moderate size, and is slightly decagonal; the poriferous avenues lie in considerable depressions of the test, which throws the am- bulacral areas into prominent relief from the interambulacra. Affinities and differences—The marginal rows of tubercles on the ambulacra, and the central rows of tubercles on the plate columns of the mterambulacral areas serve to distinguish this species from P.nodulosus. It has a considerable resemblance to the young forms of Kchinus germinans, but the regularity of the rows of tubercles on the sides and upper surface of the test, and the size and arrangement of those at the base afford good diagnostic characters by which it may be easily distinguished from that common form ; the same group of characters serves to distinguish it from Arbacia Forbesii. Locality and stratigraphical range.—We have only found this species in the Pea-grit of Crickley Hill; all the other specimens that were collected by Mr. Gibbs of the Geological Survey, were found in the same bed of this locality. We dedicate this fossil to Professor Deslongchamps of Caen, to whom palzontology is indebted for many important contribu- tions to the Oolitic fauna published in the ‘ Mémoires de la Société Linnéenne de Normandie.’ Nucleolites Woodwardu, Wright, 1852. PI. IL. fig. 5, a-e. Test subquadrate, sides tumid, dorsal surface flatly convex, anal valley deep, narrow and spear-shaped, extending from the apical dise to the posterior border ; ambulacral areas narrowly from the Lias and Oolites. 37 lanceolate ; posterior lobes short and truncated ; base flat ; antero-interambulacra and postero-interambulacra _ slightly swollen at their base; the single ambulacrum scarcely pro- duced ; mouth-opening pentagonal, situated anteriorly ; apical disc small and nearly central. Height ,5,ths of an inch, antero-posterior diameter 1 inch and ’ 5th, transverse diameter 1 inch and ;%,ths; the larger speci- mens are so much deformed by pressure that their proportional dimensions cannot be accurately given. Description —Some individuals of this species were formerly considered by us to be only varieties of Nucleolites orbicularis, Phil., but a better knowledge of the structure of this Urchin, derived from the study of a series which we collected last summer and have carefully compared with good typical examples of N. or- bicularis, leaves no doubt about the distinctness of N. Woodwardii from that Cornbrash form. The test is thin and not often suffi- ciently well preserved for determining the species; the one which we have figured is a small but a very perfect specimen, it has a subquadrate outline and is 4th of an inch broader than it is in the antero-posterior diameter ; it is slightly narrower anteriorly than posteriorly, and (which is more apparent when it rests upon its dorsal surface) the posterior margin is seen to be broadly truncated ; the sides are tumid, sometimes irregularly so, and the test is higher across the apices of the postero-lateral ambu- lacra than at any other point ; the tumidity of the sides produces a greater flatness of the dorsal surface than we observe in any other of the small Nucleolites of the Oolitic rocks; the ambu- lacral areas are nearly all of the same width, they have a narrow graceful lanceolate form, from the mouth to about midway between the margin and the apical disc, they are nearly of equal width ; at this point the pores gradually change their form, and are slightly separated apart for a short distance, and begin again to converge as they approach the disc ; the internal row are circular, the external in the form of oblique slits, the widest part of which is outwards, the circles are formed by notches in the upper and under sides of the small ambulacral plates, and the oblique slits by uncalcified portions of the margins of the same-plates ; from the termination of the petaloid portion of the ambulacral areas to the mouth, the pores are small and set wider apart, whilst the diameter of the areas remains about the same; near the mouth-opening they are again more closely crowded together, and terminate in arches the convexity of which look towards that aperture ; the interambulacral areas are of unequal width ; the anterior pair are the narrowest, the posterior pair are wider than the anterior, and the single interambulacrum ia the widest ; 38 Dr. T. Wright on new Species of Echinodermata the anal valley is a long narrow depression extending from the apical disc to the margin, it has perpendicular sides and a small anal opening, the base is flat and only slightly depressed at the mouth ; the anterior and posterior pairs of interambulacra are moderately convex in this region, and the basal portion of the single interambulacrum is very slightly produced ; the mouth- opening is excentral, nearer the anterior margin, it has a pen- tagonal form with five rudimentary lobes. The surface of the test is covered with microscopic tubercles requiring a good lens to distinguish them ; these bodies are only a little larger at the base of the test; the apical disc is small and nearly central, its elements are so closely soldered together that its general form can alone be distinguished; the eyeholes are situated at the apices of the ambulacra, and the ovarial holes further outwards and between them, whilst the madreporiform tubercle occupies the centre of the disc; the test is very thin and often deformed, its upper surface having sometimes an irregular appearance. The beauty and regularity of the specimen figured forms an ex- ception to all the others we possess of this species. Affinities and differences.—Nucleolites Woodwardit most nearly resembles N. orbicularis, and is the only one among its Oolitic congeners for which it could be mistaken. The following cha- racters are diagnostic of N. Woodwardii. The tumidity of the sides and flatness of the dorsal surface, both of which are absent in N. orbicularis. In our species the base is flat and the mter- ambulacra are slightly produced, whilst in N. orbicularis the base is concave and the interambulacra are convex and prominent. In N. Woodwardii the anal valley is narrow, whilst in N. orbicularis it is wide ; the general outline of our species is subquadrate, that of the N. orbicularis is circular ; the petaloid arrangement of the ambulacral areas extends downwards nearer to the margin in N. orbicularis than in N. Woodwardii ; the narrowness of the anal valley in our species establishes an affinity between it and Clypeus altus, M‘Coy ; but the flatness of the base and the depression of the dorsal surface in N. Woodwardii, make a wide distinction be- tween it and that species, which has a high convex dorsal surface and extremely prominent basal interambulacra, with a greatly pro- duced interambulacrum ; it differs from N. Hugii in having the anal valley extended from the disc to the posterior margin, whilst in that species a portion of the test intervenes between the dise and the valley; the difference between N. Woodwardii and N. scu- tatus and N. clunicularis is so great, that it is scarcely possible that N. Woodwardii can be mistaken for either of these forms. Locality and stratigraphical range.—We have collected this Urchin from the Great Oolite near Cirencester and at Salperton Tunnel, Great Western Railway, and from beds of the same age from the Lias and Oolites. 39 near Pewsdown, Gloucestershire, and near Burford, Oxon; it has likewise been found near Minchinhampton : as far as we know, it appears to be a Great Oolite species. We dedicate this species to our friend Mr. S. P. Woodward, of the British Museum, to whose kindness we are much indebted for the privilege of comparing our specimens with the magnificent series of Echinodermata under his care, and which he has ren- dered so valuable for reference by a systematic classification and a correct nomenclature. Nuceleolites Michelini, Wright. Pl. II. fig. 6, a-c. Test circular or oblong, discoidal and much depressed, posterior border produced, traneated and slightly deflected in old in- dividuals; ambulacral areas narrowly lanceolate ; pedal pores closely set together, vertex and apical disc nearly central ; anterior half of the dorsal surface convex, posterior half much declined from the vertex to the posterior border ; anal valley narrow above, diverging below, extending from the apical disc to the border; base flat, slightly concave ; mouth excentral, margin with five small lobes ; postero-lateral interambulacral areas slightly tumid at the base. Height =%,ths of an inch, antero-posterior diameter 3 inches and ;%;ths, transverse diameter 2 inches and -2,ths of an inch. Description.—The outline of this Urchin varies in different individuals, and it likewise varied at different periods of life in the same individual ; its most typical form is oblong, convex an- teriorly, produced and truncated posteriorly, and swollen out in the region of the postero-lateral interambulacra ; in others the circumference is nearly circular, and in some it is transversely oval ; the first form is we think characteristic of adult life, as the production and truncation of the single interambulacrum were markedly shown in the only two large specimens of this rare species which we have seen 5 in all the test is very flat, the ante- rior half is gently and nearly equally convex, the posterior half is sloping and much declined in the direction of the posterior border. The ambulacral areas are narrow, the anterior one most so; the antero-lateral and postero-laterals are about the same width, they have a lanceolate form, and are composed of very narrow plates ; about =%;ths of an inch above the margin, the pores slightly diverge from each other, and continue apart until they approach the api al disc ; the distance between the rows a, pores in this species is less than in any other Nucleolite of the same size we know, and forms one of the characters by which it is distinguished from its congeners ; the ambulacral areas are likewise slightly elevated above the general surface of the test in 40 Dr. T. Wright on new Species of Echinodermata all the specimens we have examined ; the interambulacral areas are of unequal width, the antero-lateral pair are the narrowest, they are however about nine times the width of the anterior single ambulacral area ; the postero-lateral pair are ;3,ths of an inch wider than the antero-laterals, and the single interam- bulacrum is about the same width as the latter. The anal valley extends from the apical disc to the posterior border; it is very narrow, with deep perpendicular sides above, which become shal- low and expanded below ; the postero-lateral interambulacra are swollen out at the margin; the single interambulacrum is considerably produced, and its posterior border is broadly trun- cated and slightly deflected, within which the expanded sides of the anal valley are excavated. The base is nearly flat, the eleva- tions are due to the prominence of the postero-lateral interam- bulacra, and to the deflection of the smgle interambulacrum. The mouth is excentral, nearer the anterior margin, and the oral lobes are small; the apical disc was of moderate size, judging from the space it occupied, but it is absent in all our specimens ; the surface of the test was covered with very minute tubercles, which in the examples before us are nearly all effaced. Affinities and differences.—N. Michelini in its oblong form, truncated posterior margin, and narrow anal valley resembles N. Solodurinus, but it is readily distinguished from it by the form, narrowness, and structure of the ambulacral areas; in N. Solodurinus they are expanded and petaloid, and in N. Miche- lint they are narrow and lanceolate ; the pores at no point are at any great distance apart; the anal valley in both species ex- tends from the apical disc to the margin, but it is more expanded below and deeper above in N. Michelini than in N. Solodu- rinus. We have before us Clypeus angustiporus, Agass., from a coarse Oolitic rock (Bradfordien?) near Metz, collected by M. Terquem, and kindly sent us by M. de Loriére; from this species N. Michelini differs in many particulars; in the French Urchin the apical disc is excentral, the anal valley is wide above and not much expanded below, the ambulacral areas are narrow, and the test gradually declines from the vertex to the anterior border, which forms a rather acute angle ; the base is undulated, and the mouth-opening is nearly central ; these characters clearly distinguish our Urchin from it. N. Michelini differs so widely from all the various varieties of N. sinuatus with which we are ae- quainted, that it cannot possibly be mistaken for either of them, if any care be taken when a comparison is made between them. Locality and stratigraphical range.—We have collected this species only from the Freestone beds of the Inferior Oolite of Wallsquarry and Nailsworth ; the specimen figured was cut out of the centre of a block of building stone ; the oolitic grains are Vol.2 PUI. Wy “a Aw 4 Prmted by Hidlmandel & Walton WHBaily & Sime in = as 7 ae Sar ora Pp Org Roars eH O WwOics a cy g 3 3 mS = | Q9 *R Ss Ff QB 8 Oe Phy Shes & 8 Hed 5 from the Lias and Oolites. 41 imbedded in the plates of the test, and have in some measure injured the surface. We dedicate this species to M. Michelin of Paris, the distin- guished author of the ‘Iconographie Zoophytologique,’ as a tribute of gratitude for the valuable collection of Echinoderms he liberally and generously sent us from his unrivalled cabinet, to facilitate our studies of these beautiful forms of ancient life. Nucleolites scutatus, Lamarck. Since the publication of our memoir on the CassipuLipz# of the Oolites *, we have received from Professor Deslongchamps and M. Tesson a series of type specimens of Nucleolites scutatus from the Coral Rag of Trouville, Calvados, which we have com- pared with Nucleolites dimidiatus, Phillips, described in that me- moir; from this comparison it is certain, that our Wiltshire and the Yorkshire Nucleolite, figured by Professor Phillips as NV. dimi- diatus, is the true N. scutatus of Lamarck. This circumstance affords another example of the great importance of comparing all our British Oolitic fossils with those collected from the Jurassic strata of the continent of Europe, before assigning them a position in our catalogues of species. Ophioderma Gaveyi, Wright, 1852. PI. III. fig. 1 a—e. Diagnosis.—Disc large, upper surface not exposed, under surface with five pairs of heartshaped plates, above which the five rays pass ; the median scutal plates of the rays form a ridge in the centre of each pair of plates; the mouth-opening is sur- rounded with five pairs of very prominent toothlike processes ; the rays are slender and gently tapering; the central scutal plates on the dorsal and ventral surfaces of the rays are narrow, those on the ventral surface resemble the bodies of small vertebree deprived of their neural elements. Transverse diameter of the body-dise 1 inch and ;4ths, trans- verse diameter of the rays at their junction with the disc nearly 7>ths of an inch. Description—This Sea-star must have been rather abundant in the Liasic sea; we have seen many fine specimens of it, and numerous fragments of others in the locality where it was col- lected. The body-dise is large and pentagonal, it is composed underneath of ten thin, delicate triangular plates arranged in pairs, each pair forming a heartshaped shield, having an elevated rugose carina down its centre, formed by the’median element of the ventral scutal plates which protrudes between each of the two plates forming a pair ; the five shields are otherwise smooth * Annals of Natural History, vol. ix. 42 Dr. T. Wright on new Species of Echinodermata on their under surface, and were united together in the living state by a membrane, but in the specimen before us they are quite separate from each other ; at the apex of each of the ten triangular plates a sharp toothlike process projects downwards, which together form an imposing dental circle around the mouth- opening. The rays are long, slender, and gently tapering ; we have not been able to measure the absolute length of one, as those which we have met with were always fractured ; the dorsal median pieces of the rays are hexagonal and elongated trans- versely, the ventral median pieces are elongated in the direction of the length of the ray, and resemble the bodies of small ver- tebree which had been deprived of their neural arches ; the mar- ginal plates are rounded and finely imbricated, their outward free border is toothed with five or six pectinated processes, which in the living state supported as many spies; the remains of these are sometimes seen attached to their supports; the lateral scutal plates clasp the rays firmly and securely, and over- lap the median pieces both above and below. Affinities and differences—This elegant Sea-star somewhat resembles in its: general contour Ophioderma Milleri, but it is distinguished from that marlstone species by having a propor- tionately larger body-disc, with more slender and more tapering rays: in the form and structure of the scutal elements of the rays themselves there is likewise a difference, those in O. Milleri are of a more elongated and regular form, whilst in O. Gaveyi they are shorter, more ridgy and vertebrate-like ; the ten trian- gular ventral discal plates are smaller in O. Milleri than in O. Gaveyi; they want likewise, in the figures given by Mr. Charles- worth in the London Geological Journal, the toothlike spines at their apices which are so characteristic of our Ophiura. Locality and stratigraphical range-—This Sea-star was col- lected by Mr. Gavey from the upper shales of the Lower Lias at Mickleton Tunnel near Chippmg Campden, Gloucestershire, whilst making the Oxford, Worcester and Wolverhampton Rail- way; and we have found some fragments of a Sea-star much resembling in structure this species in a Liasic bed of the same horizon at Hewlitt’s Hill near Cheltenham, during the excavation of the new reservoir of the Water Works Company of that town. We dedicate this species to our friend Mr. G. E. Gavey, whose careful and minute investigation of the beds exposed in the sec- tion which he has so well described*, added to the discovery of new forms of Radiata and Mollusca in the same, has enriched our knowledge of the Liasic fauna of Gloucestershire. * Railway Cuttings at Mickleton Tunnel and Aston Magna, by G. E. Gavey, Quart. Journ. Geol. Soc. February 7, 1853. from the Laas and Oolites. 43 Ophioderma Griesbachii, Wright. PI. III. fig. 2 a, 6. Diagnosis.—Body-dise small, upper surface not exposed, under surface irregularly subpentagonal, formed of five pairs of heart- shaped plates ; rays long, slender, and awl-shaped, prolonged beneath into the centre of the body-disc ; inferior surface with median vertebrate-like elements, and lateral scutal plates in the form of oblique pyramidal pieces, which clasp the sides of the rays in an imbricated manner, and support at their ter- minal points short stout spmes ; mouth subpentagonal, sur- rounded by ten blunt spinous processes, formed by the deve- lopment of the first lateral scutal plates of the rays, where they join each other around the mouth. Diameter of the body-dise ths of an inch, length of the rays from the mouth-margin to their apex }4ths of an inch. Description.—This beautiful Brittle-star of the Oolitic sea was discovered by our friend the Rev. A. W. Griesbach, of Wollaston, and we owe to his kindness and liberality the series of exquisite specimens before us, by which we have been enabled to complete the description of this new fossil. The body-dise is small, con- sisting of five pairs of heart-shaped plates ; the union between the separate elements of the disc was very intimate, as it is only at one or two points that a suture is exhibited ; so close is the union, that in other specimens the body-dise seems to be formed of a single circular-element ; each pair of plates has a heart-shaped form, and the ray corresponding thereto stands out in bold relief from the under surface of the disc. In none of the specimens found is the upper surface of the disc exposed, and we know not with certainty what kind of ornamentation adorned its dorsal surface ; at one part, however, where a portion of one of the plates is weathered, we think we detected with our inch object-glass under the microscope, a series of small imbri- eated scales resting on the rock surface; the rays are long, slender, and gently tapering ; their under surface, the only one exposed, exhibits, Ist, a central element having an elongated form, which resembles the body of a fish’s vertebrz in miniature ; 2nd, lateral elements more largely developed, consisting of tri- angular plates of a pyramidal form slightly twisted round, by which arrangement the apices of the pyramids are made to clasp each other, and thereby produce a regular imbricated structure ; the points of the lateral plates support small, short, stout spines, which are only seen in one of the rays of the three specimens before us. Where the base of the ray crosses the under surface of the body-dise it is firmly attached thereto, and as they ap- proach the centre, each of the lateral plates of the rays becomes greatly developed, and form by their union five channels, which dd: Dr. T. Wright on new Species of Echinodermata extend into the mouth ; this opening is in the centre of the disc, and has a subpentagonal form; it is of a moderate size, and is surrounded by ten stout spines formed by the development of the first lateral plates, which are much expanded and terminate at the oral border in short stout spinous processes; the lateral plates from the adjoming rays are here united together, so that two spines from the lateral plates of different rays are closely approximated, and the five rays are thereby united together round the mouth-opening like five Gothic arches, so that the mouth with its channels, formed by these arches, resembles a miniature starfish in the centre of the disc; the five pairs of spines may have served as jaws. Affinities and differences.—Our knowledge of fossil Ophiuride is unfortunately so limited, and the details of those forms known are so meagre, that there is much difficulty in making a comparison between the extinct genera of this family. In our description of Ophioderma Gaveyi a diagnosis has been attempted between it and O. Milleri, Phil., both of these being Liasic spe- cies. The other forms hitherto published are those figured by Goldfuss, namely the Ophiura prisca, Miinster, from the Muschel- kalk of Baireuth; the Ophiura loricata, Goldf., from the Muschel- kalk of Wiirtemberg; the Ophiwra speciosa and O. carinata, Miinster, from the Lithographic slates of Solenhofen ; of these Goldfuss’s figures are excellent, and leave nothing to be desired, as that able natural-history artist Herr Hohe, whose crayon has added such lasting value to the ‘ Petrefacta Germaniz,’ has given accurate details of structure which prevent the possibility of con- fusion regarding the identification of the species drawn by him. The Ophiura Egertoni, Brod.*, found in nodules of micaceous sandstone at the base of the Inferior Oolite near Charmouth, is so entirely distinct from our fossil, that to mistake them is im- possible ; between O. Griesbachii and O. speciosa and O. carinata, the difference is likewise very great; O. loricata comes nearer to our Brittle-star than either of the others, but the great develop- ment of the lateral plates of the rays, and the clasping and im- bricated character of the same in O. Griesbachii, forms a struc- tural character which separates it widely from Goldfuss’s species. If we seek further for resemblances to our Brittle-star, we must look for them more amongst the beautiful Ophiocome of our seas than among any forms we are acquainted with in the fossil state, but even between it and them the differences are many and distinct. Locality and stratigraphical range——This beautiful fossil was collected by the Rev. A. W. Griesbach from the Forest marble of © * Geol. Trans. 2nd series, vol. v. pl. 12. from the Lias and Oolites, 45 Oundle, Northamptonshire, where it is rare. We have dedicated this species to that gentleman, to whom we are indebted for much valuable information relative to the stratigraphical distri- bution of Echinoderms in his county, and likewise for a liberal contribution of materials to aid us in the completion of these memoirs. Pentacrinus Goldfussit, Wright. PI. III. fig. 3. Diagnosis.—Calyx composed of a central pentagonal plate, five small heart-shaped pieces, and five large triangular basal ele- ments; rays thick, strong and bifurcated ; total number of their subdivisions unknown ; the five primary rays consist of two pieces, the basal piece is flat, and has a slightly elevated portion about the centre of the upper surface, the brachial piece is strong and triangular, its base resting firmly on the former; the sides of the triangle support two arms ; the ten secondary rays consist of from ten to eleven circular pieces with smooth unequal undulated surfaces, whereby their thick- ness is rendered very unequal; the secondary rays support twenty tertiary rays, which have the same general character as the secondary rays; the number of pieces entering into the composition of each is unknown ; from the fragmentary state of this part of the specimen the number may be estimated at from fifteen to twenty pieces. The column near the calyx is composed of thin, deeply divided five-rayed plates, with well- marked transverse articular impressions on their surfaces ; every fourth plate is thicker, broader, and more prominent than the one above it or below it; the side arms are numerous, and composed of thin circular plates: the lower part of the column is unknown. Description.—This beautiful Sea Lily is remarkable among its Liasic congeners for the comparative strength and thickness of its rays ; the centrum of the calyx is simply a thickened and en- larged columnar joint to which the upper part of the column is articulated ; around the apices of the rays of this centrum five small heart-shaped basal pieces are inserted, the points of which are directed outwards; they are very convex externally, project- ing from the surface of the calyx, and have the appearance of five mammillary eminences disposed around the union of the column with the calyx. The rays are short and robust; the primary portion consists of two pieces, a flat basal plate and a triangular brachial plate ; the basal plate has a slight elevation on its outer and upper articular surface; the brachial plate has the form of an equi- lateral triangle, it is very convex externally, and has its base firmly 46 Dr. T. Wright on new Species of Echinodermata planted on the flat basal plate, and its sides support the se- condary rays ; these are ten in number, and consist of from ten to eleven circular plates, each differing in form and thickness from the other, their articular surfaces being smooth and undulated in different directions, the elevations of the one plate always corresponding to the depressions of the other with which it is articulated ; these inequalities are well seen in the specimen before us; from the various angles at which these plates lie in relation to each other, the ultimate brachial piece of each of the secondary rays has a triangular form externally, the sides of which support the tertiary rays ; these, like the secondary rays, consist of unequal-sized plates with undulated articular surfaces, which are marked with fine lines that radiate from the centre to the circumference ; the number of the elements in these ter- tiary rays cannot be accurately made out in consequence of the imperfection of this part of the skeleton ; judgmg however from the remains of the plates in a part of the slab once occupied by a tertiary ray, we estimate their number to have been from fifteen to twenty. The inferior surface of the centre of the calyx ex- hibits a depression produced by the convexity of the brachial ele- ments and the prominence of the heart-shaped basal pieces ; into this depression the summit of the column closely fits, It is unfortunate that so small a portion of the column of this Crinoid is preserved, as it is possible that the lower part of the stem was different from that which is preserved ; the upper part of the column before us consists of thin star-shaped plates, the rays of which are deeply divided, and their surfaces are sculptured with well-marked transverse articular processes ; between every third plate a thicker and broader plate is introduced ; the side- arms appear to have been numerous about the upper part of the column ; they were composed of thin circular plates havg un- dulated surfaces similar to those observed on the secondary and tertiary rays. Affinities and differences.—Pentacrinus Goldfussii resembles in some points P. tuberculatus, Mill.: through the kindness of Major Austin and Mr. Etheridge we had the privilege of comparing our fossil with Miller’s type specimen in the Bristol Museum, but the imperfection of that Crinoid makes a rigorous comparison impossible ; one point of difference which Miller thought specific of P. tuberculatus he thus describes : “The column differs in its joints, being thinner, and their having been covered all over with a more conspicuous muscular coat, which shows itself in nume- rous minute tubercles the result of its contraction * :” this cha- racter is certainly absent in our fossil. It is distinguished from * Miller’s Crinoidea, p. 65. from the Lias and Oolites. 47 P. briareus, Mill., P. subangularis, Mill., and P. sealaris, Goldf., by the absence of lateral branches from the rays, and from all others of its Liasic congeners with which we are acquainted in the strength and thickness of the rays themselves. Locality and stratigraphical range.—This remarkable Sea Lily was discovered by Mr. R. E. Gavey, C.E., in the Lower Lias of Mickleton Tunnel near Chipping Campden, Gloucestershire ; it is imbedded in shale resting on a hard slab of limestone, and was associated with the remains of other Radiata. We dedicate this fine Liasic Crinoid to the memory of the late Prof. Goldfuss, whose great work, ‘ Petrefacta Germaniz,’ has so much increased our knowledge of the Liasic and Oolitic fauna. A Tabular View of the Stratigraphical Distribution of the New Species described in this Memoir. S 2 5,|\S3les 3 26/8 é Genera and Species. Authority. gS = Ba) 5= $=| 5 ze 52 85) § |S4/2slSs| & |22/88 = [3] oC Cidaris Edwardsii ....... -.| Wright * Bouchardii ..........-. Wright ...|... Sy a Hemicidaris minor ......... AgassiZ ...| ese | wee] coe | ose * Acrosalenia crinifera ...... Quenstedt | x Diadema Davidsoni_ ...... Wright ...|-.- a Moorel _......-2-000+ Wright ...|... * Pedina Bakeri .......... Sees] WITH .2.|\n0- | cael os * — Etheridgi ............ Wright ...|... sal Polycyphus nodulosus Miinster ...} ... |---|... |». a Deslongchampsii Wright ...)--- |---| ++ - Nucleolites Woodwardii ...) Wright ...]«.. |---| «+» | «+ * Michelini ............ Wright ...|... : ms SCUtAEUS .....0csceeeee Lamarck...| «+. x Ophioderma Gaveyi......... Wright ¥ Griesbachii .......-+... Wright ...|... aco] Pentacrinus Goldfussii Wright ...| » 48 Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. ao f. WwW Ww 5. Dr. T. Wright on new Species of Echinodermata. EXPLANATION OF PLATES I. IJ. ann III. Puate I. . Cidaris Edwardsii: a, natural size, and restored to its globular form; 6, portion of an ambulacral area magnified, showing the pedal pores and tubercles ; c, primary tubercle, with its circle of areal granules, magnified ; d, one of the jaws and its tooth, of the natural size; e, secondary spine, natural size and magnified ; f; primary spines, natural size and magnified. . Cidaris Bouchardw: a, b, natural size; c, primary tubercle and ambulacral area, magnified. . Hemicidaris minor: a, natural size; b, magnified two diameters ; c, primary tubercle and ambulacral area, magnified. . Pedina Bakeri: a, natural size; 6, magnified one and a half dia- meter ; c, primary tubercle and ambulacral area, magnified. . Pedina Etheridgii: a, natural size; 6, upper surface and ovarial plates, magnified two diameters; c, under surface and mouth- opening, magnified two diameters ; d, primary tubercle and ambu- lacral area, magnified. Puate II. . Acrosalenia crinifera: a, natural size; b, upper surface, magnified three diameters; c, under surface, magnified three diameters ; d, primary tubercle and lateral granules, magnified. . Diadema Davidsoni: a, under surface and mouth-opening, natural size; b, upper surface and anal opening, natural size; c¢, side view, showing the tubercles of both areas; d, base of one of the ambulacral areas, showing the clustering together of the pedal pores in this region; e, primary tubercle, ambulacral area, and pedal pores, magnified. . Diadema Moorei : a, natural size ; 6, upper surface and ovarial disc, magnified two diameters; c, under surface and mouth-opening, magnified two diameters; d, primary tubercle, circle of granules, and pedal pores, magnified. . Polycyphus Deslongchampsii : a, natural size ; 6, upper surface and ovarial disc, magnified one and a half diameter; c, outlme of the mouth-opening ; d, genital and ocular plates of the ovarial disc, magnified; e, primary tubercle, areal granules, pedal pores, and ambulacral area enlarged. Nucleolites Woodwardii: a, upper surface, of the natural size ; 6, side view, of the natural size; c, ambulacral area and pedal pores, magnified two and a half diameters ; d, tubercles and areas, magnified ; e, mouth-opening and ambulacral area, magnified one and a half diameter. . Nucleolites Michelini : a, upper surface, reduced one-third in size ; - 6, lateral view, reduced one-third in size; c, a portion of the am- bulacral area and pedal pores, natural size. Puate III. . Ophioderma Gaveyi : a, disk, with portion of the rays, natural size ; 6, part of the upper side of a ray, enlarged three diameters ; ce, under side, enlarged three diameters. . Ophioderma Griesbachii: a, natural size; 6, disk and a part of the rays, enlarged three diameters. . Pentacrinus Goldfussii: natural size. 49 Upon a new species of “ Alpheus” discovered upon the coast of “ Herm” (Channel Islands). By W.V. Guise, Esq., F.G.S. Reap 9TH May 1854. In the course of an excursion to the Channel Islands, under- taken last summer with a view to natural-history pursuits, I spent three days in the little islet of Herm, which, though a mere rock, scarcely three miles in circumference, is equalled by few spots of similar extent within the area of the British seas, in respect of the rich field it offers for the researches of the marine naturalist. The Channel Islands, though an appanage of the crown of Great Britain, are, geographically speaking, rather a part of France than of England ; and this situation, in a sort of debate- able ground, may perhaps in some degree account for the fact of their natural history having been to a certain extent over- looked by the naturalists of both countries ; though few districts can be expected to yield a richer harvest to the scientific inves- tigator, constituting as they do the northern limit to many Mediterranean forms, which, here found flourishing in full vigour, and showing no signs of decrepitude, dwarfishness or decay, suddenly disappear, and find no footing upon our side of the Channel. This is well known to be the case amongst the testaceous Mollusca; and there is little reason to doubt, that researches prosecuted amongst the other kingdoms of nature would be rewarded by the discovery of many novel and import- ant facts. Amongst the Crustacea, to which I propose especially to direct your attention, it is only necessary to refer to the discovery of the singular and beautiful “ Phyllosoma sarniense,” figured and described by Mr. C. F. Lukis in the 8th volume of ‘ Loudon’s Magazine of Natural History,’ which example, still I believe unique, has its only analogues in one Mediterranean species, and in a few others confined to tropical areas. I propose now to lay before you another Crustacean, which it has been my good fortune to obtain in a tide-pool at low water on the islet of Herm, and which, from its immediate recognition as the “‘red shrimp” by the fisherman who accompanied me, I have reason to believe is not of unfrequent occurrence. My first idea was, that I had obtained “ Alpheus ruber,” itself a great VOL. I. E 50 Mr. W. V. Guise on a new species of Alpheus. prize, being a Mediterranean species of the greatest rarity in our seas; but upon comparing it carefully with the descriptions of Milne-Edwards in his ‘ Histoire Naturelie des Crustacés,’ I be- came convinced that I had had the good fortune to obtain an entirely new species of Alpheus ; and further investigations have only tended to confirm me in that opinion. The genus “ Alpheus” is thus characterized by Milne- Edwards :— Carapace prolonged in form of a hood or vault over the eyes. Rostrum small, and sometimes wanting. Superior antenne small ; first articulation short, and armed with- out with a plate, generally spiniform ; two following joints cy- lindrical, having two terminal threads, of which the superior is thicker and shorter than the inferior, and presenting traces of a division into two filaments towards the end. Inferior antenne inserted without and below the preceding. Lamellar palp of moderate size, sometimes small and pointed. Mandibles provided with a short, broad, palpiform appendage. External pedipalps more or less slender and elongated, termina- tion broad and somewhat foliaceous. Two first pairs of legs didactyle, the first pair strong; the one much larger and more robust than the other. Second pair weak and filiform, having the wrist multi-articulate. Three last pairs of legs monodactyle and of moderate length. This genus, says M. Edwards, appears to belong properly to the seas of warm climates. Some species are found in the Mediterranean ; but the greater part come from the seas of the Antilles or from the Indian Ocean. The genus is divided into those which have, and those which have not, a spiniform rostrum. It is further subdivided into those having a spine attached externally to the basal joint of the external antenna, and those not so furnished. The example now before us will be found to belong to the second subdivision of the first division, 7. e. to those provided with a pointed beak, and not having an external spine at the base of the external antennz. Under this head three species are described hy M. Edwards as inhabiting the European seas, viz.— Alpheus ruber, Alpheus Edwardsii, and Alpheus dentipes, which are characterized as follows :— Alpheus ruber. “ Body very slender ; larger hand provided with four longitudinal carine, two on the upper edge, two on the Mr. W. V. Guise on a new species of Alpheus. 51 external face; lower margin obtuse; moveable finger much shorter than the immoveable one. A spine upon the upper margin of both arms at some distance from the termina- tion.” It will be remarked that nothing is here said concerning the character of the anterior portion of the carapace; but as this species is said to be “ trés voisine de la précédente ” (“ Alpheus brevirostris,’ a new Holland species), which is characterized as having the border of the supra-orbital hood rounded and without spines, it is to be inferred that the like character also applies to _ A, ruber. Alpheus Edwardsii. “ Very closely allied to the preceding. Ante- rior borders of supra-orbital vaults armed with a spine, so that - the front presents three nearly equal teeth. The second joint of the superior antennz about half as long again as the first. Lamellar appendage of the external antennz dilated a little within towards the end, and not passing the footstalk of the superior antenne. Pedipalps very narrow towards the end, and extending beyond the footstalk of the superior antenne. Anterior legs nearly of the same form as in the preceding species, but more enlarged, and having the pincers more irregular ; those on one side slender and lengthened.” Alpheus dentipes. ‘“ Closely allied to the preceding : having like- wise the supra-orbital vaults prolonged into points, but having the two anterior legs nearly of the same size; the pincers of the smaller large at the base, but becoming ex- tremely narrow towards the end; having the third articu- lation of the second, third and fourth pairs of legs armed with a pointed tooth externally, at one-third the length of each.” " Upon comparison of my Channel Island individual with the three species described above, I find the following points of agreement and difference between them. It assimilates with A. ruber in having the larger hand fur- nished with longitudinal carine on the upper and the outer surface ; Differs, in not having the moveable finger shorter than the immoveable one ; and essentially in the spinous armature to the supra-orbital hoods. It assimilates with A. Edwardsii in having the anterior edge of the supra-orbital hoods armed with short spines; and in having the second joint of the superior antenne half as long again as the first ; E2 52 Mr. W. V. Guise on a new species of Alpheus. Differs, inasmuch as the lamellar appendage is not dilated towards the end; in the longitudinal carne upon the upper and outer surface of the larger pincers; in the proportions and form of the anterior feet, and in other minor particulars. Assimilates with A. dentipes, as with Edwardsii, in the spimous terminations to the supra-orbital hoods ; Differs, with respect to the comparative proportion between the two anterior pairs of legs; and inasmuch as the three hinder pairs of legs are not armed externally with a pointed tooth. Having thus shown in what respects the Alpheus from Herm assimilates with, and differs from, the three species above re- , ferred to, it remains to describe its own particular character- istics, which are as follows :— The medial line of the carapace prolonged anteriorly into a short beak: swpra-orbital vaults, each furnished at the extremity with a minute spine: anterior legs unequal; the larger hand having upon the upper edge two carinz, one behind the other, each terminating anteriorly in a small tooth projecting forwards ; two carine upon the outer surface of the claw, the lower one having a short tooth: the moveable finger not shorter than the immoyeable one, flattened laterally, and broad at the point : the immoveable finger triangular, strong, and formmg a kind of socket into which the opposing finger fits by a tubercle at its extremity: lesser pincer having a toothed keel upon its upper edge, equal in length to the others, but thinner, narrower, and much less robust: second pair of legs didactyle, slender, and having the wrist many-jointed. Length 15 lines. Colour deep scarlet, except the chelz, which are mottled with yellow. From the want of other works of reference, besides those of M. Edwards and of Professor Bell, I have it not in my power to ascertain whether the species now under notice has been distin- guished by later carcinologists ; but I have endeavoured, I think satisfactorily, to show that it cannot be identified with either of the European species of Alpheus described by the former distin- guished naturalist. As regards both the figure and description of Alpheus ruber in Bell’s ‘ British Crustacea,’ they having been confessedly taken from an imperfect individual, found im the stomach of a Cod-fish, have so little in common with my Channel Island example, that, if identical with it, it must be presumed that all the more marked points of agreement between them had been digested away in the interior of the fish. In the 8th volume of ‘ Loudon’s Magazine of Natural History,’ page 272, is however a notice of a Crustacean by the late Mr. Mr. W. V. Guise on a new species of Alpheus. 53 Hailstone, which certainly agrees far more nearly with my ex- ample than do either of those to which I have already referred ; so nearly indeed, that but little doubt remains upon my mind of its being identically the same. This species, which Mr. Hail- stone calls “ Hippolyte rubra,” and of which a figure is annexed, is thus described :— “Superior antennz with two sete, the upper ones fringed with hair and excavated below. Inferior antenne nearly the length of the body. Pedipalps with three exserted joints, the last bluntly pointed, and twice the length of the preceding one, with two rows of fasciculi of hairs. First pair of legs didactyle, very large, with the hands much compressed, unequal, the right being the larger, bristly ; the thigh excavated beneath, and its inner margin spinulose; second pair didactyle, very long, slender ; wrists many-jointed ; other legs terminated by a single claw and spinulose within; the last pair the most slender. Thorax with three short spines anteriorly. Tail with five plates, the middle one blunt at its apex, with four spines arranged in two lines. Colour deep scarlet, except above the eyes, which are concealed under the shell, and above them it is transparent and colourless. The tail is fringed with white hairs, and the legs are mottled with yellow.” Upon this, at page 274 (same volume), is a note by Mr. West- wood, in which, with much skill and critical acumen, he traces Mr. Hailstone’s individual to the group of Alpheade, and refers it to Cryptophthalmus ruber of Rafinesque, which M. Edwards identifies with his “ Alpheus ruber.” Mr. Westwood afterwards, at page 552, proposed to elevate it into the type of a new genus by the name of ‘ Dienecia.’ Mr. Hailstone’s description, as quoted above, might almost stand word for word as applicable to my example, with which it seems to tally in all important particulars, excepting as regards size, which, in the case of Mr. Hailstone’s Crustacean, is barely two-thirds that of mine. The figures too attached to Mr. Hail- stone’s notice would serve equally well to illustrate mine, with the exception of the hairy fringe attached to the setaceous extre- mities of the superior antennz. If I am right in my supposition of the identity of my Channel Island Crustacean with the three individuals described by Mr. Hailstone as brought up by the trawl-net off Hastings in 1835, it is evident that the half-digested relics procured by Mr. Cocks at Falmouth are not the first examples of an Alpheus having been recorded as an inhabitant of the British seas. Indeed it is impossible to read Mr. Hailstone’s careful and minute description without feeling convinced that a true Alphean was before him when he made his drawing and description ; and I may be par- 54: Mr. W. V. Guise on a new species of Alpheus. doned for expressing my surprise, which I do with great defer- ence to the high attainments of Professor Bell, that that distin- guished naturalist, in adopting the “ Crangon bispinosus” and “ trispinosus” of Mr. Hailstone, should have omitted all reference to a form so very remarkable and so carefully detailed as Mr. Hailstone’s “ Hippolyte rubra.” In the belief that my Channel Island Crustacean is a new and undescribed species, I propose to bestow upon it the name of Alpheus affinis ; thereby indicating the close relationship which it bears to the three other European species already referred to. 5 Fig. 1. Alpheus affinis, natural size. . 2, Enlarged view of front of carapace, showing supra-orbital vaults, insertion of antennz, &c. 3. Front of carapace still further enlarged, showing beaked rostrum and spimous armature of supra-orbital vaults. 4. Enlarged view of larger pincer. 5. Enlarged view of lesser pincer. 6. Tail. 7 Ly yi hs eaaital gh eaaee PRAM ie ig i in| of . , , Zt p 5 ’ Ri, ; re 1 aaa XY 4 Shite ey 5 } 4s a Rtnnenas CAE Address read to the Cotswold Naturalists’ Club, at their Winter Meeting, held at the Royal Agricultural College, February, 1855. By T. Barwick Luioyp Baker, Esa. of Hardwicke Court, President. THE close of another year, my friends, calls upon me, as your unworthy President, to resign into your hands an office which your kindness, and not my fitness, has continued me in for many years, and which I have hitherto accepted because I did not see clearly how to find a substitute with equal leisure and zeal in the cause. Now the case is altered, and I would seriously ask you to look through your list of members, and see if you cannot find one who, with more youth, activity, and leisure, and with talents really fitting him to preside over your discussions, has, if we may trust to appearances, not less—though certainly not more—good will to the cause than myself. If you can find such a one—and I think it cannot be difficult to do so—and can prevail upon him to accept . it—I would most gladly give into his hands one half of my office, namely, that portion of it which appertains to the Presidency— and retain for myself the other portion, which is better suited to my talents, namely, that of helping to find conveyances, endea- vouring to find the way in our rambles, reminding the members— most unpleasantly—of the flight of time, and—less unpleasantly —of the approach of the dinner hour. But, before I resign my office, I must recall to your recollection the sayings and doings, and, I trust, the enjoyings of the past year. In the first place I must congratulate the Club on the accession of some new names, which—though we are anxious to confine our numbers within certain limits—we cannot but rejoice to see on our list, namely, Dr. Voelcker and Mr. A. Williams, the Che- mical and Natural Philosophy Professors of the Royal Agricultural College; The Rev. S. Lysons, a name so well known to the Anti- quarians of England, and particularly of this county; The Rev. H. W. Bellairs, the Inspector of Schools for this and several other counties ; and J. H. Elwes, Esq., our worthy High Sheriff. Secondly, I must congratulate you, Gentlemen, on the series of papers which this year have been read at our meetings. 1st, On some Kolled Bricks, from the Channel Islands, by Mr. Guise. — 2nd, On the remains of an Ancient Cross, at Ampney Crucis, by Mr. C. Pooley. Piciag On a New Crustacean, from the Channel Islands, by Mr. uise. 4th, On the superstitious reverence shewn to Parsley, Elder, and other plants. By Mr. Jones. 5th, On Mammalian Remains, from the gravel, at Stroud, by Professor Buckman. 6th, On some Maltese Echinoderms, by Dr. Wright. These papers, Gentlemen, are a most valuable addition to our Club. The credit which accrues from them to our Society is a point that I most highly value. Yet still we must remember that ii as it introduces a new feature, and in some degree carries the Club from its original unpretending and economical character, it is only right and fair that the point should be fully considered and made the subject of a special vote from the Club, to which I pur- pose, if you will permit me, to call your attention later in the evening. To proceed, then, to recall to your recollection the days we have enjoyed as Club meetings this year. On Tuesday, Jan. 31, the Club met, as now, within the hospit- able halls of the Royal Agricultural College, at Cirencester, which, not content with being the most valued seat of science during term time, does not disdain, in the vacation, to give their assist- ance to the humbler efforts of less regular votaries. After the election of the officers, some valuable papers were read by Mr. Guise and Mr. Pooley ; and Mr. Stronge shewed us a curious growth of a root whose spongy texture had entirely choked a drain at, I think, a depth of four feet; the natural history of which was ably commented upon by Mr. Buckman. An examination of the College Museum occupied the time till dinner, after which we hada long discussion on the memorial ‘Window proposed to be erected to our valued and lamented member, Hugh E. Strickland; and the Revs. H. R. Barker, W. Symonds, and F. Bayley, and Mr. Jones and Mr. Buckman were appointed as a committee to select a design. On Tuesday, May 9, I was prevented by yeomanry duties from attending; but I am informed that the Club met at Gloucester, and after breakfasting at the Spread Eagle, proceeded in a barge to the Upper Lode, stopping to examine Wainlode Cliff, below which, the Severn being low, the dredgers succeeded in finding the following fresh-water shells :— Ancylus fluviatilis. Paludina vivipara. Nerita fluviatilis. Pisidium amnicum, of an extraor- Lymneus stagnalis. dinary large size, and auricularius. Unio tumidus. At Deerhurst Church the capabilities of the window destined to receive the glass memorial to our lamented associate, Hugh E. Strickland, was inspected, and the proposed design exhibited ; and the members present came to an unanimous decision that the early Saxon remains of this most interesting church—probably the oldest of the county—should be faithfully copied and embo- died in the records of our Club, while they remain in their present intact and complete state of preservation. This decision of the Club appears valuable, and well worthy to’ be carried out. I know not whether any steps have been yet taken in it, but if not, I would propose that some of our members— shall I suggest Mr. Jones and Mr. Buckman should be requested —if they will kindly undertake it—to make a report to the Club at a future meeting. In the course of the day Mr. Buckman pointed out the low range of hills receding from the west side of the river, and remarked ili that they are capped with sand and shingle, curiously marking the boundary of the estuarine period of the broader river. The present stream was observed to have made its way through alluvial beds, which, at the place of embarkation, are sufficiently tenacious for the making of bricks, for which purpose it is largely employed. The men at the pits said that they frequently met with the bones of large animals, perhaps Elephant, Hippopotamus, Rhinoceros, and Deer, which were the inhabitants of these isles long ere Brutus, grandson of Aineas—as the unquestionable authority of Geoffry of Monmouth informs us—landed on them and gave them the name of British. Mr. Guise’s and Mr. Jones’ papers finished the proceedings of a good day and a large meeting: many members of the Malvern Club having joined the party. Tuesday, June 14, had been fixed for a gathering of the four Clubs of this part of England, at the Speech-House, in the Forest of Dean. We breakfasted at Newnham, where we found awaiting us a specimen of that peculiarly hideous fish the Lophius piscatorius (Wide-gab fishing frog, or Sea devil), caught in the river a few days before. We then walked over the Bailey, and followed the line of the Railway to Cinderford, through most interesting sec- tions of the Old Red Sandstone, Meuntain Limestone, Millstone Grit, and Coal, all lifted up at high angles of inclination, some- times as much as 61 degrees. Hence to Lightmoor Colliery, where, in addition to a noble steam engine, we were shewn a most ingenious and valuable con- trivance to obviate the effect of the occasional negligence of the engineer, by which the truck of minerals just raised from the mine is occasionally drawn over the pulley, tu the great danger both of machinery and human life. In this machine, when the truck approached too near the pulley it was caught and remained suspended, while the rope, detached from it at the same moment, might be carried harmlessly round and round the barrel. A peculiar blight upon the Forest Oaks, at a distance, was so observable as to give them quite an October aspect, but we did not approach sufficiently near to examine them minutely. Mr. Buckman is disposed to think that it was not a blight, but arose from the circumstance that the first leaves of the oak buds came out early, and soon changed to a dark hue, and then to the autumnal tint. The buds then, in the middle of summer, took a fresh growth, and you had the varied tints arising from prema- turely old leaves with an unusually new state of young leaves. This was very general last summer throughout England. How- ever this may be, Sir James Campbell, the Ranger of the Forest, has since told me that he has often seen the same in former years, both in this and other forests, and the effect on many trees which he has annually measured, has been that, in the years when thus affected, they have not grown in size at all. At the Speech-House, about seventy persons sat down to din- ner—half being members of the Cotteswold Club and friends— iv the remainder being members of the Worcester, Woolhope, and Malvern Clubs. Mr Jones exhibited a beautiful series of Rhyn- conella subdecorata, from the inferior oolite, a species erected by Mr. Davidson, from the examples now shewn; and the Arbacia Forbesii, a rare Echinoderm, from the Gryphite grit. Mr. Atkinson, Deputy Gaveller of the Forest, exhibited some curious plans of the coal and iron mines of the district ; and Mr. Herbert Mackworth gave us much interesting information on the fire-damp, and exhibited a variety of apparatus for testing its presence, observing particularly on the almost necessity which exists for a higher state of education and intelligence in those workmen who have the charge and care of mines. A member of the Worcestershire Naturalists’ Club announced the interesting discovery in his county, during the past year, of Carex montana and Potamogeton flabellatus. On Tuesday, July 11, the Club met at breakfast at Minety Station, and then broke into two sections—the one to examine the Railway cuttings, of which the President and Secretary formed part, and there turning off to Braydon Pond, about a mile from which, close to the high road, was a curious specimen of one of the ancient elms of Lydiard Forest. The trunk, about 25 feet in circumference at six feet from the ground, rose from a tangled and almost solid mass of roots, which, as near as I could measure it, was 21 feet long by 15 feet across. ‘What was seen by the other section, who, under the guidance of Mr. Bowly and Mr. Taylor, went on an antiquarian expedition to the Market-place and Abbey of Malmesbury, we know not, as no report was given us. I would venture to suggest, as a rule of the Club for the future, that whenever the Club breaks into sections, some one be ap- pointed as Secretary for the day with each section, who shall be requested to draw up a short report of what has been seen for the next meeting. On Tuesday, August 8th, we again essayed, in spite of our failure of weather on the former occasion, to persuade Ladies to honour us with their company at Cirencester. This time the weather was most fortunate, and the day was thoroughly enjoyable and enjoyed. After breakfast we proceeded in flies and other vehicles through the Park, stopping to look at the noble Cathedral Firs, and then driving on to the Edgeworth Valley, we rambled and scrambled through it ; finding, amongst others the following interesting plants : Asperula eynanchica. Dipsacus pilosus. Vicia sylvatica. Orchis ustulata. Hippocrepis camosa. On a rocky side of the valley, facing the south-west, was found a pretty natural collection of ferns, consisting of Polypodium calcareum. Aspidium filix mas. 5 vulgare Cystea fragilis. Asplenium trichomanes. Scolopendrium vulgare. 99 adiantum nigrum. Returning by the old house of Pimbury Park, with its fine terrace of yew trees, we dined, to the number of 70 in the Wood- house. Papers—none were forthcoming; but the toast to the health of the strangers, was responded to by the Hon. General Watson Webb, now of New York, but whose ancestors were of our own county; and Mr. Buckman gave us some most interest- ing and amusing details of his recent American tour. On September 12th, the Club, contrary to all but irrevocable decree, accepted the invitation of the Earl Ducie to breakfast and dine at his hospitable mansion at Tortworth. The day was most auspicious, and while Lord Ducie most ably acted as Geological pioneer, led one section through a fine geological country embrac- ing the trap rocks, Silurian, old red sandstone, and mountain lime- stone of the neighbourhood, a second section roamed through the Park, along the walks, round the lake—now being opened out and restored to order—by the entrenchment, which still bears the ominous name of Bloody Acre; by the site of the Vineyard, which flourished at no distant period (though of the flavour of its wine we have no accurate record) ; by the Lover’s Leap, the pens of Circassian Deer (Cervus Wallichii) ; the kitchen gardens, close to which is a remarkably fine Auracaria; and then, crossing the road, to the Court, where the Chestnut, described as “ The Old Chest- nut,” in the days of king John, still grows broad and green, a noble specimen of antiquity ; while near at hand a considerable variety of Pines, amongst them a remarkably fine Insignis and Sabineana attest the improvements which latter years have made in giving variety in colour and form to the landscape. After dinner, several papers were read, particularly one by Dr. Wright, on a number of Echinoderms, collected in Malta by our noble host, and which forms a prominent feature in our forth- coming number. And now, Gentlemen, before I release you, I must touch upon a few other matters relative to the year which has passed since our last winter meeting. I cannot but allude to the loss which the cause of science has sustained in the death of Professor Edward Forbes, of whom it has justly been said, by Professor Buckman, He will long be re- ‘membered as a genius ; as a naturalist, who, while he could well _ trace distinctive characters, was not a mere species maker: this his thorough acquaintance with morphological views, and the great physiological facts connected with both plants and animals, kept him above and beyond. His mind was that of the great but not fanciful generaliser. In Natural History, indeed, he was a Philo- sopher, not a mere collector. Another point you must allow me to mention, is that of the new number added, or being added, to our transactions. It is one of which we may justly be proud, but I must also remind you vi that it is one which entails upon us a considerable expense, and although I for one should be glad to see the expense still farther increased by an increase of such papers—still, as it was not con- templated in the original formation of our Club, I think it right to bring the matter fairly before your consideration. It appears to me that three courses lie before us. First—to print ail such papers as may be read, even at an additional in- _erease of expense, yet still amounting to buta small sum per annum if regularly collected. Secondly—to limit ourselves, as was originally intended, to matters connected with the Natural History of the County. And, Thirdly, to make an arrangement by which any members might subscribe for any number of copies they might wish for, and so divide the cost according to the number of copies ordered. This matter, Gentlemen, I beg to leave in your hands—reminding you, however, that the unpreci- dented call of one pound each is made this year—it is in fact for the transactions of this year and last, as nothing was collected last year. Though I, however, should be sorry to limit our papers strictly to county matters, yet I confess I should be glad to see these more closely followed up. We have as yet no list of Fossils, Plants, Shells, or Insects, any of which would form a most desir- able and apppropriate feature in the works of our Club; while of our numerous and interesting antiquities, with the exception of Mr. Pooley’s paper of this year, not a word has been said save the simple record that the Club has visited them, as given in the address of your most unscientific President. Forgive, Gentlemen, my calling your attention to this subject. I am, as you all know, a man of few ideas beyond my county, and though I should be sorry to see the transactions of the Club strictly limited to the field of our rambles, yet I cannot but think that we should more especially fulfill our mission, as a County Club, by devoting more attention to the Natural History and Antiquities of our own district. "Notes on the Natural History of the County of Gloucester. By Professor J. Buckman, F.G.S., F.LS., &c. ON THE ORCHIDACEZ., The Orchids present such a large assemblage of highly curious plants, that it seems astonishing so little should be popularly known about our native examples. It is true that a few species of exotic Orchids may be met with in the hot houses of the more wealthy, and these are esteemed on account of the strange forms which their flowers frequently assume, and the exquisite perfume some of them exhale. But though it is quite true that these have had their share of attention, yet who in a country walk at home ever plucks an Orchis, much less examines its structure, and yet they abound everywhere, and offer a showiness of flower, a variety of colour and structure with, in some species, an odour which Vil should maké them general favourites. The Primrose, the Cowslip, the Hycacinth, and otker of our wild flowers, find their way into the cottage garden, but we never yet saw an Orchis in a cottage garden or taking part in a rustic nosegay ; however, great heaps of the commoner ones may occasionally be noticed laying prostrate by a stile or scattered about the country childrens’ play-ground, having been gathered by the little unsophisticated creatures who have always a deep love for “ pretty flowers,” which, in as far as the Orchis is concerned, is early destined to be clouded by a prejudice which, in after life, is so strong as not merely to lead to indifference, but to a positive superstitious dread of these beautiful and harmless creations. This feeling would appear to have been derived from the name, which country people apply to some of the commoner species, namely, that of “ Bloody Man’s Fingers;” no doubt applied on account of the digitate roots which are white and fleshy, and bear no distant resemblance to bloodless fingers; and yet, curiously enough, this form of root is not common to the commoner species as the two everywhere met with, the Orchis morio and O. mascula, have two rounded tuberous appendages below the surface of the soil, which contain so much starch as to make the plant by some be considered as worthy of cultivation. Little however as these plants have been attended to as objects of floral culture yet they will be found well worthy of notice in this respect, to which end field specimens should be marked when in flower for removal in the autumn, a remark necessary inasmuch as the usual plan of taking up flowering roots when first observed, usually results in disappointment in these, as it would be the case with most plants when in full flower. Of course observation of the locality, soil, and habit of growth, would conduce greatly to success. The following is a list of all the species which I have met with in our County. These are 18 belonging to 8 genera, being some- what more than half the genera belonging to the British Flora, as described by Hooker and Arnott, and nearly half the species, the numbers being of total British species 38 appertaining to 14 genera. List of the Orchidacee of Gloucestershire. 1. Epipactis latifolia, Broad-leaved Heleborine.—In the woods in Oakley Park, Cirencester, Birdlip, and most of the Cotteswold woods and thickets. 2. i grandiflora, large white H.—Plentiful in Oakley Park, and " a north Cotteswold woods, but no where in the ale. Sa us ensifolia, narrow-leaved white H.—A few years since I met with two specimens of this plant beneath the Rookery trees of Oakley Park, and not deeming but there would be others, I at once appropriated these exam- ples of an exceedingly rare plant to my Herbarium, but alas, the most diligent search for years has not again given me sight of a living specimen. It may 17. 18. aia viii well serve as a curious subject of enquiry as to how it came there, and may illustrate how easily a plant may become extinct in any given locality. . Listera ovata, Twayblade.—Common in our woods. nidus-avis, Bird’s-nest Orchis.—Common under the beeches in Oakley and other woods. Having taken up speci- mens of this plant, with their curious bunches of nest- like roots, I cannot at all agree that it is parasitic, as is usually supposed. . Neottia spiralis, Ladies’ Traces.—The only locality in which I have met with this plant, in Gloucestershire, is in a grass field on the south slope of Marl Hill, near Chelten- ham. This field, from its regular ridges, had evidently once been in tillage, and yet it seems an isolated example of a pasture with us containing this plant, which, at the time of my visit, some 15 years since, was very abundant in this habitat. Orchis Morio, Green-winged Meadow Orchis.—Too common in pas- tures, in which its great abundance may betoken poverty of soil, as it is usual in “cold hungry clays.” as mascula, Rarly purple Orchis.—Common to rough meadows and low thickets. . Orchis ustulata, Dwarf dark-winged O.—I have met with occasional examples on Sevenhampton Common, near Chelten- ham ; at Eyford, near Stow-on-the-Wold; and on the slope which descends from Dunsburn into Edgeworth valley. 9 latifolia, Marsh O.—In damp marshy meadows, frequent. a maculata. Spotted O.—Common to woods and thickets. » pyramidalis, Pyramidal O.—In Oakley and other Cotteswold woods and thickets. . Gymnadenia conopsea, Fragrant Gymnadenia.—Occasionally met with in Oakley, Uley, and other woods and thickets of the county, well distinguished by its lilac coloured flowers and fragrant scent. . Habenaria bifola, Butterfly Orchis—Common in the Cotteswold woods. This is also a highly fragrant species. ¥3 viridis. Green H.—At Charlton, near Cheltenham, and Furzen Leaze, near Cirencester. . Herminium Monorchis, Green Musk Orchis.—This I have“only met with in one locality, namely, on the slope of Ravens- gate Hill, below Linover wood, where it forms a rounded bay, looking down ufon the village of Charlton. Ophrys apifera, Bee Orchis.—This beautiful specimen has been met with, more or less sparingly, in several habitats. I have gathered it on Painswick. Hill, on Leckhampton Hill, and very fine examples in Oakley Park. The most curious locality in which I have met with it is on a spoil heap thrown out in making the Thames and Severn Canal, by the Engine-house near Tetbury road Station. Ophrys muscifera, Fly O.—In Lineover Wood, Charlton Kings, and in the woods bounding the north side of Sapperton Valley, but only sparingly. Cirencester, 1855. On Fossil Echinoderms from the Island of Malta; with Notes on the stratigraphical distribution of the Fossil Organisms in the Maltese beds. By Tuomas Wricut, M.D. &c., Professor of the Natural Sciences in the Cheltenham Grammar School. Reap 14TH SErpreMBeER 1854. A. Notes on the Maltese beds, with the species they contuin. Tue Island of Malta is entirely composed of tertiary rocks of Miocene age, which have been described by Capt. Spratt, R.N.*, and surveyed and mapped by the Earl Duciey. Through his lordship’s kindness, we have been enabled to study a complete suite of Maltese rock specimens, together with an extensive col- lection of the fossils obtained from them, whilst resident in the island; and it is but just that we should state, at the outset of these remarks, that whatever is valuable in this memoir relating to the stratigraphical distribution of the Urchins and other fossils in these beds, is entirely due to the Earl Ducie, who has most liberally given us all the information he noted on the spot, relative to the range and distribution of the species. It is to be distinctly understood, however, that neither the measurement of the beds, nor the limitation of the range of the fossils in them, are given as absolute truths, but rather as the nearest approximation thereto which the present state of our knowledge permits. : The Maltese islands comprise Malta, Gozo, and Cumino. Malta is seventeen miles in length by seven in breadth ; Gozo is nine in length by five in breadth; and Cumino about two in length by one in breadth. The direction of their long axis is 8.E. and N.W., which, with the channels, is about twenty-nine milesinlength. All the rocks are sedimentary and marine, having a slight inclination from N.E. to E.N.E.; their direction corre- sponds with that of the Apennines, and with the intermediate * “On the Geology of the Maltese Islands,” with Notes on the Fossils by Prof. E. Forbes. Proceed. of the Geol. Soc. London, vol. iv. p. 225. + The Earl Ducie kindly presented a copy of this map to Mr. Good- enough, book- and map-seller, Strado Reale, Malta, by whom it is now being published. VOL. II. F 56 Dr. T. Wright on Fossil Echinoderms line observed in Sicily from the Val di Noto to Polizzi. Nume- rous faults traverse the N.W. half of Malta and the S.E. of Gozo, which have much disturbed the beds, caused the depressions now forming the north and south channels between Cumimo and Malta and Cumino and Gozo, and left the islet of Cumino an isolated fragment of the uppermost beds, which attests the former con- tinuity of the land, before these islands were fractured by subter- ranean and denuded by aqueous agency. ‘“ The mineral deposits,” says Capt. Spratt, “composing this group, have a thickness of 800 feet visible above the sea ; they lie nearly horizontal, and are conformable, although there is a great diversity of mineral cha- racter and condition in the series. None of the deposits are wholly destitute of organic remains; but, on the contrary, they generally contain them in tolerable abundance, and in a good state of preservation.” The strata may be divided into five groups, each of which contains fossils that are special to it, very few of the species being common to the whole series. These, in a descending order, are, 1st, the coralline limestone ; 2nd, the yellow sand; 3rd, the clay; 4th, the calcareous sandstone; 5th, the hard cherty limestone. No. 1. The coralline limestone, consists of a reddish-white calcareous rock, mostly hard and compact, and sometimes changed into an indurated calcareous sandstone. It attains a thickness of 100 feet, but has been much denuded in several localities. Some isolated portions of this bed, from . being slightly variegated in colour, were formerly used for certain durable work, under the name of Gozo marble. Fossils of No. 1. Mo.uuvsc¢a. EcHINODERMATA. Voluta, cast of a large species. Cidaris Miletensis, Forbes. Haliotis, ditto of a n. sp. Echinus Duciei, Wright. Troehus, ditto. Echinolampas Deshayesii, Desor. Spondylus quinquecostatus, Desh. | Clypeaster crassicostatus, var. of C. Ostrea Boblayei, Desh. altus. Ostrea Virleti, Desh. Brissus latus, Wright. Pecten Pandora, Desh. imbricatus, Wright. squamulosus, Desh. oblongus, Forbes, MSS. Burdigalensis, Desh. Brissopsis Duciei, Wright. Arca, casts of. Schizaster eurynotus, Agassiz. Cytherea, ditto. Pericosmus excentricus, Wright. metas 3 CoRALLIA. Eschara monilifera. Stylastraea. Escharina, n. sp. CRUSTACEA. Carapaces and chelz of several species. from the Island of Malta. + 57 No. 2. The yellow sand, is sometimes slightly indurated, and has an abundance of greenish-black grains intermixed with it. In some places it abounds with Foraminifera. Enormous numbers of Lenticulites complanatus, Defr., the flat side of the shell cor- responding with the bedding of the rock, occur in some localities, as in the cliffs of Ramala Bay, Gozo, and in many places in Malta. Intercalated with these Nummulites are banks of oysters, the teeth and vertebre of fishes, especially those of the great shark, Carcharodon megalodon, with the bones of Cetacea. The greatest number of Echinoderms are likewise found in this bed. It varies in thickness from 10 to 40 feet. Fossils of No. 2. MAMMALIA, determined by Prof. Owen (Forbes). Delphinus, more than one species. Manatus? bones apparently of this genus. FisueEs, determined by Sir Philip G. Egerton (Forbes). Cerax aduncus, Agass., teeth of. Carcharodon megalodon, Agass., do. Carcharias productus, Agass., do. Oxyrhina xiphodon, Agass., do. hastilis ? Agass., do. — Mantelli? Agass., do. Hemipristis serra, Agass., do. —— paucidens, Agass. With other undetermined Squalidz. Mo.uuvsca. Nautilus, 2 sp., undescribed. Scalaria retusa, Brocchi. Voluta, Mitra, Cypreea, Conus, 2 sp., Columbella, Oliva, Natica, Turri- tella, Turbo, Pleurotoma, Pyrula, Phorus, Trochus ;—casts only of these genera. Ostrea Virleti, Desh. Ostrea navicularis, Desh. Pecten cristatus, Bronn. —— squamulosus, Desh. Burdigalensis and 3 other sp. Area, Isocardia, Venus, and Tellina, in the form of casts. Terebratula ampulla, Brocchi. bipartita. BRYOZOA. Cellepora mammillata. Retepora. EcHINODERMATA. Clypeaster altus et var. C. turritus, Leske. marginatus, Lamk. folium, Agass. _ Echinolampas Richardi, Desmout. Kleinii, Goldf. Conoclypus plagiosomus, Agass. Brissus oblongus, Forbes. FoRAMINIFERA. Lenticulites complanatus, Defrance. CoRALLIA. Caryophyllia. Fungia. No. 8. The clay bed, has a dark blue, drab, or a light gray colour, and is much charged with iron. of thickness from 30 to 60 feet. In it are found crystals gypsum, and occasionally nodules of sulphur. It varies in It is the retentive water-bearing stratum of the islands, and all the water falling upon the upper beds percolates through them, and bursts out in springs along their line of junction with the clay. Casts of shells and frag- ments of bones are very abundant in it; but Echinoderms are comparatively rare. F2 58 Dr. T. Wright on Fossil Echinoderms Fossils of No. 3. FISHEs. EcHINODERMATA. Teeth of Myliobatis, Lamna, Car- Spatangus Desmarestii, Goldf. charias, and Euphyllia, are abun- Pericosmus latus, Agass. dant. Mo.uvusca. CoRALLIA. Megasiphonia zic-zac? (allied to the Fence London-clay species). Scalaria, Pleurotoma, Mitra, Cassis, Rostellaria, Conus, 3 or 4 sp., Pecten, Ostrea, Cardita, Lucina. No. 4. The calcareous sandstone.—“This bed covers the greater part of the island of Malta. From it nearly all the build- ing stone is procured, and it is likewise the rock from which the Maltese vases are cut. The lower beds abound in Echinoderms. Scutella and Schizaster are not unfrequent; but Hemiaster Scille is the most abundant species. These Urchins are often seen standing out in relief on the beach, the sea having worn away the surrounding rock. They are very serviceable in afford- ing a foot-hold on the rocks, which otherwise would be danger- ous to land upon.” (Lord Ducie.) This bed is subdivided by Capt. Spratt into five strata, which he thus describes :— “T). is a white calcareous sandstone, lying subjacent to the marl, into which it quickly passes, and is from 20 to 30 feet in thickness. « F. is a bed of fine-grained sandstone, 15 to 20 feet thick, of a reddish-white, and sometimes gray colour. These contain several species of Foraminifera. “Fa pale yellow calcareous sandstone, often containing flinty nodules, from 30 to 50 feet thick. In some parts it is thinly stratified, and separable into brittle plates of sandstone; but more generally it assumes a closely bound and unstratified cha- racter, when it is used for buildmg; but it is very liable to exfoliate on exposure to the weather. “ G. Chocolate-coloured nodules, irregular in figure and size, in calcareous sandstone, with which are mixed casts-of shells, Caryophyllia, and other organisms ; also fishes’ teeth, vertebra, and coprolites are very abundant. All the nodules are of organic origin ; it is, in fact, a bone-bed of considerable extent, for it preserves a very uniform character throughout the islands ; but in Gozo it is more developed, and contains more remains ; especially in a flat ledge just above the sea-level, under the cliffs of Fort Chambray, and at Marsa il Forno, on the north-east coast, where its durability has checked the encroachment of the sea. Its thickness is estimated at from 2 to 8 feet. “ H. A close-grained, pale yellow sandstone, incapable of being from the Island of Malta. 59 split along the line of bedding. It is extensively quarried for building and other purposes, being easily cut with the knife or saw. Large blocks of it are turned into: pillars, vases, balus- trades, and other architectural ornaments. This stone is exten- sively used for building in the islands ; and, for the same use, is largely exported to many parts along the shores of the Medi- terranean. It attains a thickness of from 40 to 50 feet. _ ©The stone from which the finely-carved vases are cut, comes from the lower part of this bed, and is obtained near Naxiar. The rock in this locality dries whiter, is finer grained, and more compact than in general.”—Spratt. “Tt is impossible to distinguish between the beds D, E, F, in the above grouping, except in cliff-sections.”—Earl Ducie. Fossils of No. 4. REPTILIA. CIRRHIPODA. Chelonia, sp. Balauus stellaris. Lepas, sp. FIsHEs. CRUSTACEA, Pyenodus, numerous teeth of this Numerous remains of this class. genus, with vertebre and other bones of this class. Shas boca Schizaster Parkinsonii, Defrance. Mouuvusca. — Desori, Wright. Nautilus, sp. undescribed. Spatangus Hoffmanni, Goldf. Scalaria Duciei. Seutella subrotunda, Leske. Conus, Cyprea, Solarium, Natica, striatula, Marcel de Serres. Phorus, casts only. Brissopsis crescenticus, Wright. Pecten laticosta. ~ Hemiaster Grateloupi, Desor. — Burdigalensis. — Scille, Wright. Lucina. Tellina. Cotteaui, Wright. No. 5. The hard cherty limestone, “is a yelluwish-white cream-coloured limestone, having sometimes semi-crystalline strata alternating with an oolitic grit or sandstone, apparently composed of minute fragments of shells and corals. It attaims a considerable thickness, since nearly 400 feet of it in perpen- dicular depth is visible on thé north-west coast of Gozo.” (Spratt.) “This bed forms a high and rocky coast-line on the south end of Malta, and dipping to the north appears about the water-line in the neighbourhood of Valetta and Sliema, forming a barrier to the sea. Probably the softer superincumbent beds have in course of time been worn away, till the appearance of this rock arrested any further encroachment. A Scutella inva- riably marks the junction of this bed with No. 4.” (Earl Ducie.) The New Dock is built of this rock, and it is quarried in several places for building purposes, and it is likewise burned for lime. 60 Dr. T. Wright on Fossil Echinoderms Fossils of No. 5. The fossils of this. bed are imperfectly known, from being obtained with much difficulty. Of Mollusca, casts of Solarium, Conus, Phorus, Natica, Cyprea, Pecten, Lucina, and of the Cirrhipoda, Balanus, have been recognized in it. Of the Echi- nodermata, ‘ Scutella subrotunda, Clypeaster, sp., Brissus, sp., identical with that of No. 2. Such is also the case with the Pectens.” (Forbes.) We cannot conclude our brief notice of these Maltese deposits without alluding to a similar Urchin bed of the same age in the island of Corsica. Through the kindness of our friend M. Michelin, the eminent zoophytologist of Paris, we received some time since a number of Echinide from this Corsican deposit, which we have carefully compared with the fine suite of Maltese Echinoderms now before us. Many of the species from Corsica and Malta are identical, although some from both islands are special to each region. From these data we con- clude, that the deposits containmg the Echinoderms described in the sequel of this memoir are of the Miocene period, and of the same age as the tertiaries of the south of France, the north of Italy, and of Doberg bei Biinde in Westphalia. M. Collomb, an eminent French geologist, lately visited the Urchin bed near Bonifacio in Corsica, and has given an account thereof in a letter addressed to Prof. Constant Prévost ; the following abstract relating thereto will be read with interest :— « We shall quit now,” says M. Collomb, “ the eruptive rocks, and transport ourselves to the south, at Bonifacio, where we have remained some days, to go and see the bed of fossil Urchins. They are found in a fragment of limestone completely enclosed in the granite. Bonifacio is built upon a high escarpment of this limestone, formed of horizontal beds having a coarse struc- ture, full of the fragments of shells, the species of which were indeterminable. This escarpment is incessantly beaten and demolished by the action of the wind and the sea. Upon all this coast the beds overhang, and are worn into caverns by the inroads of the sea. “The bed of Urchins is situated at some leagues to the north- east of Bonifacio, towards the roadstead of Santa-Manza, at the limit of the granite. The escarpment itself is here granitic, and the Urchin limestone caps the granite. The bed which contains the most beautiful specimens is only accessible by means of a ladder, and their extraction is difficult.” The Calcaire 4 Oursins is only found in three localities in Corsica, at Bonifacio, at Aleria, and at Saint-Florent, and W. H Baily, del et lith Printed by Hullmandel & Walton. la_c. Cidaris Miletensis, Forbes -2.a—f Echinus Duciei, Wright 2. &_d Echinolampas Deshayesiu, Desor from the Island of Malta. 6] always in small detached beds of inconsiderable extent, which do not extend into the interior of the island. The deposits of Bonifacio and Saint-Florent were the only ones visited by M. Collomb*. The rock is a light-coloured limestone, sometimes white and soft, or hard and cherty, and contains an abundance of small quartz pebbles derived from the decomposed granite. B. Description of the Fossil Maltese Echinoderms. Cidaris Miletensis, Forbes MSS., n.sp. Pl. IV. fig. 1 a-c. Test oblately spheroidal, much depressed at both poles; am- bulacral areas undulated, depressed in the centre, with an elevated marginal row of close-set tubercles on each side of the areas ; poriferous avenues of the same width as the areas ; interambulacral areas rather prominent, with two rows of primary tubercles, about six in each row; mammillary emi- nences large, each with a circle of boundary granules ; spines nearly the diameter of the test in length, tapering from the base to the apex ; mouth-opening very large. Dimensions.— Height =8,ths of an inch; transverse diameter 15, inch. Description.—This is a very rare Urchin in the Maltese beds. It has an oblately spheroidal figure, and is much depressed at both poles; the ambulacral areas, with the poriferous zones, are gently undulated ; they measure together ths of an inch in width; the areal band is depressed in the middle, and its elevated margins are covered with two rows of large equal-sized close-set granules ; internal to these are two rows of much smaller granules, and down the centre is a depressed furrow: the pori- ferous avenues lie likewise in depressions, bounded internally by the marginal granules of the ambulacral areas, and externally by the encircling granules of the primary tubercles: the inter- ambulacral areas are 34 times the width of the ambulacral ; they form rather prominent convex portions of the test, with from five to six rows of primary tubercles in each of the two rows of these areas: the areolas are large and prominent, the summits are smooth and without crenulations, and the tubercles, which are proportionately large, and with a very small perforation in their summit, stand well out from the body: a circle of larger granules surrounds the base of the mammillary eminences ; these circlets are each complete in the two superior tubercles, but one series is common to two tubercles in those near the mouth ; the boundary im all, however, is defined, as none of the * Bull. de la Soc. Géol. de France, tom. xi. p. 67 et seq., 2 série. ~ 62 Dr. T. Wright on Fossil Echinoderms areolar spaces are confluent: in the centre of the interambulacral areas is a depressed space, which is filled with small close-set granules: the mouth-opening is very large, and that for the apical dise is so likewise: the spines taper gently from the shoulder to their apex; they are round, and sculptured with longitudinal lines; their absolute length is not determinable, as neither of those before us are perfect; they may have attained the length of the diameter of the test. Affinities and differences.—We know so few true Cidarites from the tertiary rocks, that materials for comparison fail us. The only species we possess is the C. Alabamensis, Morton, from the tertiaries of the U. States, which has nearly straight am- bulacra, ten tubercles in each row in the interambulacra, with wide intertubercular spaces between each pair of rows. The Maltese Urchin differs essentially from this species, and may be easily distinguished from it by the concave ambulacral areas, and the marginal rows of tubercles that define these portions of the test. It is somewhat remarkable that we should have discovered so few Cidarites in all the Urchin beds that have been so dili- gently explored in the tertiary beds of Europe. Locality and stratigraphical range.—This species has been found only in bed No. 1, the Gozo marble, where it is rare. Echinus Duciei, Wright. PI. IV. fig. 2 af. Test circular, much depressed : ambulacral areas more than half the width of the interambulacral, with two rows of marginal, nearly equal-sized tubercles throughout, and two other rows within these, extending from the border to the mouth ; one of these inner rows ascends a short way above the border : inter- ambulacral areas with eight rows of tubercles at the border, diminishing to two rows abuve the others, disappearing or becoming of secondary size ; from the border to the mouth, the eight rows continue of uniform size: the pores are in triple oblique pairs ; between each pair there is a slight ridge of the test, which gives a singular zigzag figure to the pori- ferous avenues : mouth large and decagonal, base flat : apical dise of moderate size, but not preserved. Dimensions —-Height 33ths of an inch; transverse diameter 132 inch. Description —This beautiful Urchin has been thought to be identical with the H. Sczlle, Desmoul., and the one figured by Scilla in pl. 138. fig. 1, pl. 25. fig. 1, and pl. 26. fig. A, B, of his work* ; but the number of tubercles on each of the plates * De Corporibus Marinis Lapidescentibus. from the Island of Malta. 63 in our specimen differs from the Echinus @ Messana of that author, who has figured only one large tubercle on each plate of that form. From £. Scilla it is certainly distinct, as we know of no Urchin that is common to the cretaceous and tertiary rocks. The test is circular, much depressed on the upper surface and flat below; the ambulacral areas are almost ;;ths of an inch in width at the border, where we count four rows of tubercles; the marginal rows are very uniform in size and arrangement from the mouth to the disc; the two in- ternal rows are smaller, and continue from the border to the mouth ; one of these extends a short distance on the sides, but on the upper half of the areas there are only the two marginal rows: the interambulacral areas are {/>ths of an inch in width at the border ; there are eight rows of tubercles at this point and onwards towards the base, they are nearly of the same size ; but, from the border to the apical disc, the second row, from the ambulacral areas, alone possesses the size the tubercles have at the border; the tubercles in the others diminish in size, and disappear as the areas become narrower ; above, we find only two marginal tubercles of the primary size, and internal to these, a few of secondary magnitude irregularly set: all the tubercles are raised on mammillary eminences, with areolas around their bases, and numerous large granules fill up all the intervening spaces, so that the surface of this Echinus has a very tuberculated appearance. The poriferous avenues are on a level with the test; the pores are arranged in triple oblique pairs ; between each pair there is a slight elevated ridge; every two ridges of each triple oblique pair of holes is connected by another ridge, which runs at an angle of 45° to them; by this arrangement the poriferous avenues exhibit a curious zigzag character through these little elevations of the test in the line of the pedal pores. The base is flattened, the mouth-opening is large and decagonal, and the jaws and teeth are narrow and much curved inwards; the apical disc is absent in all the speci- mens we have examined ; the space for the same is, however, of moderate size. Affinities and differences.—This species may be distinguished from Echinus Serresii, Desmoul., from the Molasse de Provence, in having larger tubercles, with less granulation at their base, and the absence of the zigzag ridges between the pairs of pores: from Echinus dubius, Agass., another tertiary species from the Molasse of Villeneuve in Provence, it is distinguished by the more uniform size of its tubercles, the depression of the upper surface, and the zigzag ridges of the poriferous zones. Locality and stratigraphical range.—It was collected from bed No. 1, the Gozo marble, Malta, where it is not uncommon. We 64 Dr. T. Wright on Fossil Echinoderms have dedicated this species to the Earl Ducie, who collected the beautiful specimens we have figured. Family CrypeastTRIpZ. This natural family includes all the Urchins which have a circular, elliptical, or pentagonal form, with a thick test, the surface of which is closely covered with small, nearly equal- sized tubercles sunken in the plates, and surrounded by ring- like areolas ; these all carry short hair-like spines. The mouth _,, 18 large, central and pentagonal, and is armed with five strong jaws which carry the same number of teeth: the anus is pos- ® terior, and marginal or inframarginal: the interior of the test ~ is sometimes divided by pillar-like processes of the inner layer of the plates. The dorsal portions of the ambulacral areas have a petaloid form, circumscribed by large poriferous zones; the basal portions are narrow, rectilineal, or branched. The five genital plates form a circle around the madreporiform body, and between these are wedged the five ocular plates. This family includes the genera Clypeaster, Lamk., Laganum, Klein, Echinarachnius, Van Phels., Arachnoides, Klein, Scutella, Lamk., Dendraster, Agass., Lobophora, Agass., Encope, Agass., Rotula, Klein, Mellita, Klein, Runa, Agass., Moulinsia, Agass., Scutellina, Agass., Echinocyamus, Van Phels., Fibularia, Lamk., Lenita, Desor. Genus Crypraster (Lamarck, 1816). Form oyal, inclining to pentagonal, rostrated before, truncated behind ; upper surface more or less inflated, sometimes campa- nulate, conical or subconical ; inferior surface flat, always concave around the mouth, with five straight simple ambulacral furrows proceeding from the angles of the mouth to the border; the dorsal portion of the ambulacral largely petaloid, greatly exceed- ing the interambulacra in size, and forming elegant leaf-like expansions, in general convex, arched, and prominent ; bounded on each side by large poriferous zones, the pores of which are wide apart and united by transverse sulci ; the apical disc formed of five genital plates at the summits of the interambulacra, with five ocular plates alternating with them; in the centre of this circle is the spongy madreporiform body, of a pentagonal figure : tubercles uniform in size and very numerous, equally distributed over the test; summits perforated, and surrounded by very deep areolas ; mouth symmetrical, central, pentagonal, lodged in a concave depression in the middle of the base ; auricles composed of ten distinct auricular processes set in pairs: the jaws form ~ a pentagonal pyramid, composed of ten separate pieces, trun- cated at the summit, which is bordered by a subcireular band ; Jrom the Island of Malta. 65 teeth five, large, and bent: anus small, round, and inframar- ginal: interior of the test with a number of pillar-like processes towards the border. All the species of this genus live in the seas of warm latitudes, or are found fossil in the tertiary rocks only. We have six living and twelve fossil species. Clypeaster altus, Leske, sp. Syn. Echinus é Melita, Scilla, Corp. Mar. pl. 9. figs. 1, 2. Echinanthus altus, Leske, Klein, Echinoderm. apud Leske, No. 48. p- 189. pl. 53. fig. 4. Echinus altus, Gmelin, Linné by Turton, vol. iv. p. 149. Clypeaster altus, Lamarck, Hist. Nat. des Animaux sans Vertébres, 2nd ed. tom. iii. p. 290 ; Deslongchamps, Encycl. t. ii. p. 199 ; Defrance, Dict. Se. Nat. t.ix. p.449; Blainville, Man. d’ Actin. p: 216; Desmoulins, Echinides, no. 7. p. 216; Agassiz and Desor, Cat. rais., Ann. Sc. Nat. tom. vil. p. 130; Sismonda, Ech. Foss. Nizza, p- 46; Ech. Foss. Piem. p. 40; Grateloup, Mem. Foss. Oursins de Dax, p. 41. Test oblong ; anterior border convex ; lateral borders undulated ; posterior border squarely truncated ; marginal fold more or less thickened ; dorsal surface elevated into a dome shape ; vertex nearly central ; ambulacral areas largely petaloid, their base extending nearly to the margin: base flat; mouth large and pentagonal, with a deep sulcus extending from the angles to the border, and corresponding to the middle suture of the ambulacral areas: anus small, round, and submarginal: granulations larger and more prominent at the base than on the dorsal surface. Description.—This beautiful Clypeaster has been so long known, that it seems unnecessary to give any lengthy details of its struc- ture; although it may be remarked, however, that we are not aware that a detailed description of the species exists. It was first troduced to notice through the figure of Scilla, and the specimens before us belong to the same type as that given in his work. Many of the Maltese varieties of this species, however, are remarkable for their deviation from this typical form; the dorsal surface in them rises into a campanulate shape, and the circumference becomes almost round. These varieties con- stitute the Clypeaster turritus, Agass., from the Miocene of Dax, and the Clypeaster Agassizii, Sismonda, from beds of the same age near Nice. We have before us a similar conical variety from Malta, belonging to the Museum of the Bristol Institution ; and others, collected by the Marchioness of Hast- ings, are in ‘the Jermyn Street Museum. All the specimens in Earl Ducie’s cabinet, with one exception, 66 Dr. T. Wright on Fossil Echinoderms belong to what we regard as the typical form. This remark- able exceptional specimen agrees with the brief notice of C. Tauricus*, Desor:— Trés grande espéce, allongée, pentagonale, a bord fortement renflé. Zones poriféres trés large & leur ex- trémité. Tert. du Taurus, ile de Créte.” If we are correct in referring all these varieties to C. altus, it follows that this species has a wide range of deviation from what we take to be its typical form ; but these limits of variation are probably not greater in this than in some other species of Urchins. The following table shows the relative dimensions of three forms,—the typical, the conical, and the flattened and tumid varieties :— Forms. Length. Breadth. Height. Type specimen .........++. 5 inches. | 434,inches. | 23 inches. Conical, var. d. ...cseceeee- 585 5 a3, 435 55 Tumid, var. 0. c.ccccscoces 655; Oe 55 Qwty ay The ambulacral areas are largely petaloid, nearly equal in length and width; they are rounded, widely open below, and extend over four-fifths of the dorsal surface in the type form, over nearly three-fourths in the conical form, and over almost four-fifths in the tumid varieties; in all, the areas form prominent convex elevations of the test, which are bounded by wide poriferous avenues, composed of two series of simple pores united by oblique grooves; the internal series of pores are round, the external series are elongated transversely in the direction of the grooves; the pores at the end of the avenues are much more so than those of the summit; the apical dise is small, and occupies the centre of the dorsal surface, lying in a slight depression formed by the bending-in of the summits of the areas; those of the single area, and the antero-lateral and postero-lateral areas of the left side, beg rather more pro- minent than those of the right side of the test. The madre- poriform body occupies the whole surface of the disc, the ocular and genital plates being quite indistinguishable from the general structure of the test; the five genital pores pass obliquely into the interior, at a short distance from the disc. The base is flat, and the mouth lies in a very deep depression in the centre of the under surface ; the opening is pentagonal, its wide walls being formed by the incurving of the basal por- tions of the areas; from each of the angles of the pentagonal opening, a deep furrow passes outwards towards the margin of the test, and becomes continuous with the median suture of the * Cat. raisonné des Echinides, Ann. Se. Nat. tom. vii. p. 131. from the Island of Malta. 67 ambulacral areas. The jaws are absent in all the specimens we have examined. The anus is a small round aperture, situated near the posterior margin of the base of the test; in some specimens it is elongated in the transverse diameter, and measures about ,%ths of an inch across. The tubercles are nearly of the same size on the upper surface, and their summits are level with the test, so that the areolas which surround them are excavated out of the superficial layer of the calcareous plates. The intertubercular surface is ornamented with a microscopic granulation, disposed in circles around the areolas of the tu- bercles, and filling up all the intervening spaces. The tubercles at the base are larger and more closely set together than those on the dorsal surface; a row of five or six tubercles is seen on each of the interfissural bands of the poriferous avenues. Affinities and differences.—C. altus has many traits in common with C. rosaceus. In the general outline, in the size, form and extent of the ambulacral areas, there is much resemblance ; but the campanulate form of the dorsal surface, the smallness of the apical disc, and the truncature of the posterior border constitute differences which may be traced through all the varieties C. altus assumes. The thickness of the marginal fold, and the great development of the ambulacral flower, when compared with the thinness of the border and the limited extent of the ambulacra, distinguish at a glance C. altus from C. Tarbellianus, C. marginatus, and C. scutellatus. The dome-shaped upper surface of C. umbrella, with its flattened ambulacral areas and convex prominent interambulacral spaces, its star-like apical dise and small mouth-opening, widely distinguish this species from C. altus. The affinity, however, is very near between C. altus and C. crassicostatus, the principal difference consisting in the more prominent rib-like prominence of the ambulacral areas. Stratigraphical position.—This is the most abundant of all the Maltese Urchins. It is collected from bed No. 2, the yellow sand, associated with C. Tarbellianus, Echinolampas Richardi, and the other Echinoderms enumerated in the palzon- tological résumé given in the introduction to this memoir. The test is very well preserved in most specimens. Those from the sand with black particles are in the finest preservation. In this stratum the Urchins are accompanied with Terebratula ampulla, Pecten squamulosus, P. Burdigalensis, Ostrea Virleti, O. navicularis, and masses of Lenticulites complanatus, with Cellepora mammil- lata, Escharina monilifera, and other Bryozoa. It has been collected from the Miocene beds of Port-de-Bouc, Saint-Miniato, Tuscany; Nice, Turin, Ile de Créte, Ile de Caprée ; Bonifacio, Corsica; Oran. The Maltese specimens are 68 Dr. T. Wright on Fossil Echinoderms contained in the British Museum, Geological Museum, Jermyn Street, and Bristol Museum; that from the Ile de Caprée is in our cabinet. History.—First figured by Scilla, in 1670. The list of synonyms prefixed tu this article exhibits the various epochs in its history. In none of the works we have consulted is any detailed description of the species given. Clypeaster marginatus, Lam. Syn. Scilla, Corp. Mar. tab. 11. fig. inferior. Clypeaster marginatus, Lam. An. sans Vert. tom. iii. p. 290, 2nd ed. ; Deslongchamps, Encycl. Méthod. t. ii. p. 200 ; Defrance, Dict. Sc. Nat. t. ix. p. 450; Blainville, Man. Act. p. 216; Grateloup, Foss. Ours. p.40; Agassiz and Desor, Cat. raisonné, t. vii. p. 131 ; Desmoulins, Etudes des Echinides, no, 12. p. 218. Test large, depressed, subpentagonal; margin thin, broad, and expanded ; outline of the border undulated ; ambulacral areas short, oval, and convex, rising abruptly from the thin border, and forming a dome-shaped elevation in the centre of the dorsal surface; base flat; mouth-opening small and penta- gonal, with five simple sulci extending from the angles thereof to the margin; anus small, round, and submarginal. Dimensions.—Antero-posterior diameter 6,4, inches, breadth 6,4; inches, height at the centre 1,8; inch, thickness of the margin about 3th of an inch. Description.—This magnificent Urchin was figured by Seilla. The specimens before us agree very well with his drawing, although the foreshortening of the dorsal surface does not give a sufficient elevation to the ambulacral dome. The expansion of the margin, and thinness thereof, make a marked distinction between this and other cognate forms. The figures given by Grateloup of his C. Tarbellianus so exactly resemble the large specimen before us, belonging to the Bristol Museum, that we no longer doubt that species being a variety of C. marginatus. This species, like C. altus, exhibits much deviation from what may be considered to be its type form. A long and attentive study of the Echinide has shown us, that such difference of outline is the rule, and not the exception, in the group; and that specific characters must be drawn from organic structure, and not merely from outline, if we wish our species to have a permanent place in the register of Nature’s forms. The ambu- lacral areas are gracefully petaloid, rounded at the base and tapering towards the apex ; they are convex and prominent, and extend about half-way between the vertex and the border, the test rising into a dome-shaped elevation in the region of the am- from the Island of Malta. : 69 bulacral areas. From the base of the areas to the circumference the margin is thin and expanded, and in this respect resembles a Scutella much more than a Clypeaster. The interambulacra between the poriferous avenues form convex elevations, which give a stellate character to the central dome, all the more conspicuous as it rises abruptly from the thin expanded margin; which is almost destitute of any elevation. The tubercles are larger on the basal than on the dorsal surface. In only one of the specimens before us is the inferior surface exposed. The base is flat. The pentagonal mouth is much smaller than in C. altus. Ina speci- men before us, measuring 4,7, inches in length, the mouth- opening is ;4,ths of an inch in diameter; the oral lobes curve inwards and form the interspaces thereof. Acute narrow am- bulacral grooves pass outwards to the circumference. Affinities and differences—The thin and broadly expanded border of C. marginatus, with its short ambulacra, and central dome rising suddenly from the middle of the test, form a group of characters which enable us readily to distinguish this species from its congeners, with one exception, C. Tarbellianus. The excellent figures of this Urchin, given by Grateloup in his able Memoir*, we have compared with two forms of C. marginatus from Malta, and we confess our inability to distinguish the differences between them and the author’s type-figure. Agassiz and Desor consider them to be the same, and we agree with their conclusion. Grateloup observes, in describing C. marginatus, “ We ought not to confound this species with that which I have described (C. Tarbellianus), with which it has great affinities of form, figure, and size. Its test has also a summit ¢rés-renflé, convex, and - more elevated than in C. Tarbellianus ; but its border is a little less évasé, and much less ¢ranchant. The ambulacras are equally shorter, more redressés, and of a more oval and acute form.” We have only to observe, that the characters here cited vary in different individuals, and at most amount to that limit of variation which we have already observed is seen in all species of Urchins, where a number of individuals of the same form are assembled for comparison. Stratigraphical range.—This species is found in bed No. 2, the yellow sand, associated with C. altus and the other forms enumerated from that stratum ; it has been found likewise in the Miocene beds of Touraine, Landes, Naros, Bonifacio, Santa Manza, Corsica; and Dax. History.—First figured by Scilla, and afterwards by Leske. Fine specimens are contained in the Mus. Jermyn Street, * Mém. sur les Ours. Foss. de Dax, p. 40. pl. 1. fig. 5-6. 70 Dr. T. Wright on Fossil Echinoderms British Museum, Bristol Museum, and the Collection of the Earl Ducie. The specimen in our cabinet is from Santa Manza, and was sent us by M. Michelin. Clypeaster folium, Agassiz. Syn. Clypeaster folium, Agassiz and Desor’s Cat. rais., Ann. Sc. Nat. tom. vil. p. 131. Test subheptagonal, much depressed; borders thin and sharp like Scutella; the petaloid ambulacra short, open, and ex- panded below ; acutely lanceolate at the apex; ambulacral rosette small, and rising gently from the middle of the dor- sum ; poriferous zones lie in angular depressions ; apical disc small, with a central prominent madreporiform tubercle. Dimensions.—Antero-posterior diameter 137 inch, transverse diameter 134 inch, height ,3,ths of an inch. Description.—The general outline of this little Urchin, with the structure of its ambulacral rosette, clearly prove it to be a Clypeaster, whilst its depressed dorsal surface and thin border show it to have affinities with Scutel/a. Its outline is subhep- tagonal, with the anterior border slightly produced ; the petaloid ambulacral areas are short and widely expanded below, tapering and acutely lanceolate above; their apices closely approach at the vertex, and meet at the circumference of the madreporiform tubercle; the poriferous zones lie in angular depressions of the test, which, added to the convexity of the ambulacra, give a much greater relief to the petaloidal star than in other congeneric forms ; the rosette formed by the petaloid portions of the ambu- - Jacra is small, being only a little more than one-half the diameter of the antero-posterior axis. The two rows of pores in the pori- ferous zones diverge gently from each other from the apex to the base, and there are from thirty to thirty-six pairs of holes in each zone. At the junction of the test-plates there are slight depressions on the surface, corresponding to the sutures between the same ; the tubercles are small and set rather closely together, and the intervening granulation is quite microscopic ; the border is exceedingly thin and entire; the base is concealed by firmly adherent matrix, which cannot be removed without fracturing the test. Affinities and differences.—C. folium is allied to the young condition of C. marginatus, but the general flatness of the dorsal surface, and the absence of the campanulate elevation of the ambulacra in that species, added to the greater wideness of the basal opening of the petaloid ambulacral areas, and the more angular depression in the poriferous zones, afford points of comparison whereby these two species may be distinguished from the Island of Malta. 71 from each other: the thinness of the border and flatness of the dorsal surface are diagnostic characters by which it may be known from its congeners. Locality and stratigraphical position.—The only specimen we know from Malta is that contained in Earl Ducie’s collection ; it was obtained from bed No. 2. We have another specimen before us, kindly sent by M. Michelin from the Miocene terrain of Balistro, in the Gulf of Santa Manza, Corsica. Agassiz and Desor, on the authority of M. Deluc, give the tertiary of Palermo _ as the locality of their specimen. History.—This species is enumerated in the ‘ Cat. rais.’ of Agassiz and Desor, and stated to be “ espéce trés plate, 4 bords tranchant.”’ A detailed description of this interesting form is now given for the first time. . Genus Scureiya (Lamarck, 1816). Form in general suborbicular, extremely depressed, almost always discoidal, more or less enlarged behind ; border often tren- chant, disc entire, margin lobed; posterior border truncated; upper surface slightly convex; ambulacral flower small, with elegant, flat, blunt leaves; poriferous zones forming nearly a closed arch around them at their base; genital pores four, set around . the spongy madreporiform body; base flat; mouth small, central, and pentagonal, with five ramose ambulacral furrows, sometimes branched, passing from the mouth to the border : tubercles microscopically small and very numerous; test thick, interior divided by pillar-like processes: auricles five; jaws forming a more or less elevated star composed of five distinct pieces, each formed by the organic union of two elements ; teeth five, linear, and horizontal. This genus, as now limited, con- tains only fossil species, one of which is from the chalk of Georgia, United States; all the others are from the tertiary rocks. Scutella subrotunda, Leske. Syn. Echinus Melitensis, Scilla, De Corp. Marin. tab. 8. figs. 1-3. Echinodiscus subrotundus, Leske apud Klein, tab. 47. fig. 7. p. 206. Echinus subrotundus, Gmelin, Linné by Turton, vol. iv. p. 152. Scutella subrotunda, Lamarck, Animaux sans Vert. 2nd ed. tom. iii. p- 284; Defrance, Dict. Se. Nat. tom. xlvin. p. 230; Des- moulins, Etudes des Echinides, no. 24. p. 232; Grateloup, Ours. Foss. pl. 1. fig. 1. p. 36 ; Agassiz and Desor’s Cat. rais., Ann. Se. Nat. tom. vii. p. 132. Test very flat, suborbicular; dorsal surface slightly convex ; ambulacral areas exceeding in length the semi-diameter of the VOL, Il. G 72 Dr. T. Wright on Fossil Echinoderms dise ; base slightly concave; mouth central; anus marginal ; ambulacral sulci bifid and branched. Dimensions.— Antero-posterior diameter 2,8, inches, trans- verse diameter 35%, inches, height 2/>ths of an inch. Description.—The test of this delicate Urchin is extremely flat; it has an irregular suborbicular discoidal form, with a thin sinuous margin; the dorsal surface is regularly and gently convex. The ambulacral areas are more than half the length of the diameter of the test ; they are of an oblong form, lanceolate above, and more obtuse below. The pores in the avenues are widely apart; those in the inner series are round, whilst those in the external series terminate in slits that extend about half way across the interporiferous spaces. The apical disc is large, and the elements thereof are intimately soldered together. The madreporiform tubercle occupies the centre, and the four genital pores are pierced at unequal distances around it; the anterior pair are smaller and closer together than the posterior pair; the five ocular pores are very small, The margin of the disc is very thin, and has a sinuous outline ; five of the curves thereof cor- respond to the ambulacral areas, and those appertaining to the postero-lateral areas are the deepest and best defined; a small notch indicates the site of the anal opening. The ventral surface is slightly concave. The mouth, about two lines in diameter, is central and subpentagonal ; from the angles thereof, five ambu- lacral sulci radiate outwards, which soon become bifid, each trunk becoming dichotomously branched in old individuals. The anal opening is round, about half the diameter of the mouth, and is situate near the posterior border. The tubercles are small, and closely placed together; they are nearly of a uniform size on the dorsal surface. Affinities and differences.—S. subrotunda so closely resembles S. striatula, S. Faujasii, and S. producta, that it requires an at- tentive study to discover the differences between them. As we possess single specimens only of these forms, determined and presented to us by M. Michelin of Paris, we are certain of their identity with the types they represent. The test is narrower before, and the ambulacral areas are much smaller in S. striatula than in S. subrotunda; the ambulacral areas are wider, their bases and apices are more obtuse, their sides flatter, and their ter- minations are more truncated, andthe anus further from the border in S. producta than in S. subrotunda; the test is more convex on the dorsal surface, the apical disc is wider, the margin is thicker, the base flatter, and the anal aperture much further from the border in S. Faujasit than in S. subrotunda; the test is more produced posteriorly, the margin is more sinuous, the ambulacral from the Island of Malta. 73 areas are more equally lanceolate at the base and apex, the inner row of pores of the same curve more gracefully outwards, and the anus is further from the border in S. Brongniartii than in S. subrotunda. The size and pyriform shape of the ambu- lacral areas, the absence of sinuosities in the margin, and the greater convexity of the dorsal surface, distinguish S. Paulensis from S. subrotunda. Stratigraphical range and distribution.—This species is not un- common in the calcareous sandstone bed No. 4, and in the junc- tion beds of No. 5, the hard cherty limestone, at Malta. It is found likewise “in the marine calcaire grossier in the environs of Bordeaux ; at Bazas, Léognan, Gradignan, Douai, in Dauphiné ; in Tourraine ; in Anjou ; at Montpellier.” (Grateloup.) History.—The table of synonyms shows the phasis of the history of this species, although other forms have been mistaken for it: in fact, the species of Scutella approach each other so closely, that, without an authentic series of specimens for com- parison, similar mistakes may be made. This Urchin is found in all the public collections. The specimens before us are from Malta and Léognan. Scutella striatula, Marcel de Serres. Syn. Scutella striatula, Marcel de Serres, Géognosie des Terrains Tertiaires, p. 156 ; Desmoulins, Etudes des Echinides, no. 25. p. 234 ; Agassiz, Monogr. des Scutelles, tab. 18. fig. 1-5. p. 81; Agassiz and Desor’s Cat. raison., Ann. Sc. Nat. tom. vii. p. 134. Scutella subrotunda, Grateloup, Mém. Ours. Foss. tab. 1. fig. 1. p.36. Test very flat, suborbicular; dorsal surface very slightly convex ; ambulacral areas small, short and narrow, Jess than the semi- diameter of the disc ; base nearly flat; mouth central; anus marginal; ambulacral sulci bifid. Dimensions.— Antero-posterior diameter 27% inches, trans- verse diameter 2%, inches, height ,4,ths of an inch. Description.—This Urchin so nearly resembles S. subrotunda, that it may be doubted whether it is entitled to rank as a distinct species, or ought rather to be considered as a variety of that form. The two specimens before us are from localities widely apart from each other. One is from the Miocene terrains of Terre- Négre, near Bordeaux, the other from the calcareous sandstone of Malta. Still the similarity exhibited by these specimens, and the persistence of those characters which have been considered as specific, incline us to think that S. striatula may be distinct from S. subrotunda. The ambulacral rosette is small; the areas are short, narrow and lanceolate, and are less than the semi- diameter of the test ; the apical disc is small ; the madreporiform G2 74 Dr. T. Wright on Fossil Echinoderms tubercle is prominent and central; the granulations are almost microscopic; the base is flat; the mouth is small and central, and the anus marginal; the ambulacral, sulci are bifid; the margin of the test is thin, and the sinuosities well marked. Let the student compare these characters with the detailed description of S. subrotunda given in the preceding article. Locality and stratigraphical range.—It was collected from bed No. 4, the calcareous sandstone at Malta, where it is not common. Our French specimen is from the middle tertiaries of Terre- Négre. Genus Ecurnotampas (Gray, 1835). Test of an elongated or subdiscoidal form; petaloid portion of the ambulacral areas large, generally elevated into convex leaves, contracted towards the base, where they cease to rise above the level of the test ; inferior surface concave towards the mouth, which is median, symmetrical, pentagonal, and sur- rounded by five lobes; basal portions of the ambulacra with five short poriferous zones around the mouth; anus transversely oblong and inframarginal; apical disc small and excentral, five genital and five ocular plates placed around the madreporiform body ; tubercles small, uniform and numerous, sunk in the test, and surrounded by ring-like areolas. Three species are living in the seas of warm latitudes; the others are fossil, mostly in the tertiary rocks. A few are found in the upper stages of the cretaceous series. Echinolampas Kleinii, Goldf. Syn. Clypeaster Kleinii, Goldfuss, Petrefact. Germanic, tab. 42. fig. 5. p. 133. Echinolampas Kleinti, Desmoulins, Etudes des Echinides, p. 346. no. 14; Agassiz and Desor, Cat. raisonné, Ann. Sc. Nat. tom. vil. p. 166. Test ovato-orbicular in the outline, with the posterior border slightly produced ; dorsal surface convex, posterior half more elevated than the anterior; ambulacral areas unequal, usually on a level with the general surface, but sometimes more convex and prominent than the rest of the test; apical disc excentral and anterior ; base concave; mouth excentral and anterior ; anus inframarginal; both mouth and anus trans- versely oblong. Dimensions. — Antero-posterior diameter 2,% inches, trans- verse diameter 233 inches, height 1,9, inch. Description.—This Urchin has been well figured by Goldfuss, and is a very characteristic fossil of the Miocene tertiary beds from the Island of Malta. 75 of Westphalia, where it appears to be common. The specimen before us is the only one we know from Malta. The circum- ference is nearly ovato-orbicular, slightly inclining to an obsolete pentagon, with the posterior border most produced. The dorsal surface is highly convex, the posterior half being much more so than the anterior. The ambulacral areas are unequal, as regards length, width and development; the single anterior area is the shortest and narrowest, the antero-laterals are next in size, and the postero-laterals are the most fully developed; they have all a lanceolate form, with blunt apices. The surface of the areas is on a level with that of the interambulacra, in the specimen before us; but in some of the Westphalian Urchins the ambu- lacral areas form convex projections on the surface of the test. The poriferous avenues, extending down more than two-thirds of the dorsal surface, are well marked in our specimen, and lie in depressions of the test ; they consist of two series of pores; the internal holes are round, the external run into oblique slits that have a direction upwards and inwards; the pores on the right and left sides of the areas do not always correspond in length ; thus, the anterior pores in the antero-lateral areas are often only half as long as those on the posterior side of the same areas, and we see a similar inequality, although not to the same extent, in those of the single ambulacrum. The anterior and posterior pair of the interambulacral areas are much alike in form and development; but the single interambulacrum is different, it forms a more convex eminence than the others above, and is produced into a slight caudal appendage behind. The apical disc is small and excentral, situated nearer the an- terior border.. The madreporiform body occupies the centre, around which the four genital holes are pierced. The base is concave ; the mouth is nearer the anterior border, is transversely oblong, and surrounded by five lobes, formed by the termination of the interambulacra; the posterior single lobe is the largest ; the anterior pair are next it in size, and the lobes of the postero- lateral areas are the smallest and most contracted. Between the five oral lobes, the poriferous terminations of the ambulacral areas form petaloidal depressions, which are perforated with numerous holes; these run out and form lines which indicate the basal boundaries of the areas... The anus is transversely oval, ;4,ths of an inch in its long diameter, is more convex on its anterior than its posterior border, and is situated close to the margin; it is rather larger than the mouth-opening. The tubercles are small, uniform in size, and closely set together on the dorsal surface, and longer and more widely apart on the base. _ Affinities and differences.—The great convexity of the dorsal 76 Dr. T. Wright on Fossil Echinoderms surface, the greater elevation of the posterior than the anterior half thereof, the inflated ridge-like eminence formed by the single interambulacrum, and the well-defined character of the pori- ferous avenues, form a group of characters by which E. Kleini is distinguished from its congeners. It has many points of resemblance in common with E. ovalis; but the greater length of the ambulacral areas in this species makes a marked distine- tion between them ; moreover, in E. Kleinii the base is concave, whilst in E. ovalis it is convex; the latter form is likewise flatter and more oval, and its apical disc more excentral than in E. Kleinii. Stratigraphical position.—Collected at Malta, from bed No. 2, where it is very rare. It is found, according to Goldfuss, in the Miocene beds at Biinde, Osnabruck, Astrapp, and Merminghiifen, in Westphalia. History.—Admirably figured and well described by Goldfuss. The only Maltese specimen we have seen of this species is that collected by the Earl Ducie, which is in his lordship’s museum. Echinolampas Deshayesii, Desor, sp. Pl. IV. fig. 3 a-d. Syn. Echinolampas Hayesiana, Agassiz and Desor, Cat. raisonné, Ann. Sc. Nat. tom. vil. p. 166. Test oval, depressed; ambulacral areas narrow; the poriferous zones contracted, without apparent connecting transverse sulci ; apical disc small and nearly central; base convex; mouth and anus large. Dimensions. — Antero-posterior diameter 2,4, inches, trans- verse diameter 1,2, inch, height ,%,ths of an inch. Deseription.—The form, size and structure of the ambulacral areas afford the best guide to a knowledge of the numerous species of this group. The Urchin before us has an oblong form, de- pressed at the dorsal surface, convex at the base, and slightly produced posteriorly. The ambulacral areas are narrow at their widest part ; they are about one-sixth the width of the postero- lateral imterambulacra at the border. The poriferous zones are narrow, and extend rather more than half-way down the dorsal surface ; the pairs of pores are placed closely together, and the slit or sulcus, which in general unites the inner and outer series of pores together, is absent in this species, or at all events is not apparent in the individuals before us ; the holes of both rows are nearly of the same size. The interambulacral areas are wide; the antero-lateral are the narrowest ; the single interambulacrum is slightly produced in the region of the anal opening. The apical disc is small, and situated near the centre of the test, from the Island of Malta. 77 rather nearer the anterior than the posterior border. The disc consists of a central madreporiform spongy body, around which the geuital and ocular plates are arranged in a circle; their sutural lines of union, however, are concealed, and can only be seen in weathered specimens. The base is convex; the mouth is very large, and lies in a deep depression opposite the vertex ; it is surrounded with five oral lobes of small size, with inter- vening petaloidal depressions, perforated with holes in pairs. The interambulacrum is slightly produced posteriorly. The anus is a large transversely oblong opening, situated near the margin. The border of the test is rather obtuse. ‘The tubercles are of uniform size on the dorsum, and are larger and less numerous than in #. Kleinii. Affinities and differences.—This species resembles much E. scutiformis, but is distinguished from it by the greater narrowness of the ambulacral areas, and the absence of the transverse slits or sulci by which the pairs of pores in these avenues are in general united. The tubercles are more abundant on the dorsal surface in H. Deshayesii, and the dorsal surface is not so much elevated in that species as it is in E. scutiformis. Locality and stratigraphical range-—This species was col- lected from bed No. 2, the yellow sand, at Malta. Desor gives the “Tert. moyen. d’Oran (Algérie) et de Carthagéne (Cata- logue)” as his localities ; and we have received from M. Michelin of Paris a specimen from the Miocene terrain of Balistro, Cor- sica, which has enabled us to identify the Maltese Urchin, and make out the preceding description, the first given of this pretty form. Echinolampas Richardi, Desmarest. Syn. Scutum ovatum Issyaviense, Klein, Echinodermatum, tab. 20. fig. a, 6, § 77. p. 29(2). Clypeaster Richardi, Desm. Dict. Se. Nat. t. liv. tab. 5. p. 12, spec. ined. in litt. ; Grateloup, Mem. Echin. Foss. tab. 1. fig. 8 a, 8, p. 44. Lichinolampas Richardi, Desmoulins, Etudes sur les Echinides, p.342. no. 4. Echinolampas Laurillardi, Agassiz and Desor, Ann. Sc. Nat. t. vii. p- 165.—Scilla, Corp. Mar. tab. 11, top figure, showing the base only. Test oblong, produced posteriorly, rounded before, flattened laterally, caudate posteriorly ; dorsal surface convex, elevated ; base concave ; mouth central; anus inframarginal, lodged in a caudal process of the interambulacrum ; ambulacral areas narrow, with contracted poriferous zones. Dimensions.—Antero-posterior diameter 1,4 inch, transverse diameter 1,9, inch, height }7ths of an inch. 78 Dr. T. Wright on Fossil Echinoderms Description.—The specimen before us is so much injured on the dorsal surface, that we are unable to give a detailed descrip- tion of this species, which appears to be not uncommon at Malta. The ambulacral areas are narrow; the pores lie in contracted zones, and the pairs are unconnected by sulci; the avenues ex- tend more than half-way down the sides of the test ; the dorsal surface is elevated and convex, rounded before, and sloping gra- dually from the vertex to the posterior border; the apical disc is very excentrical, and placed near the anterior border ; the cir- cumference of the test is of an irregular oblong figure, round before, flattened on the sides, and produced behind : the base is undulated by the elevations of the interambulacra and the de- pressions of the ambulacral areas; the single interambulacrum is prolonged backwards, and is truncated at the sides and at the posterior border, which gives it a caudate form. The mouth is nearly central, and is sunk in a deep depression; it is transversely oblong, and is surrounded by five oral lobes, having five petaloidal depressions of the ambulacral areas, with three pairs of pores in each petal between them; the anus is larger than the mouth-opening, and is situated at the inframar- ginal border of the caudate process of the interambulacrum ; it has a transversely oblong form, and is more convex before than behind. The Urchin figured by Grateloup is much larger than the Maltese specimens that have come under our notice ; but the central mouth-opening and the form of the interambulacrum induce us to think that it is only a gigantic variety of E. Richard, and not EF. Kleinii, as supposed by Desmoulins. The identity of this species with Klein’s Scutum ovatum Issyaviense may or may not be correct, as the figures of fossils in that work are not in every case to be depended on. : Affinities and differences.—E. Richardi has some resemblance to E. Kleinii, but the narrow ambulacral areas, the flattened sides, and produced caudate interambulacrum in E. Richard afford points of distinction by which these allied forms may be readily distinguished from each other. In E. Kleinii the base is more concave, the mouth nearer the anterior border, and with larger oral lobes than in E. Richardi. The dorsal surface presents other points of difference: in EZ. Kieinii the posterior half of the test is the most elevated, whilst in H. Richardi it slopes rather abruptly downwards from the vertex to the truncated posterior border. Locality and stratigraphical range.-——It was collected from bed No. 2, at Malta; the specimen before us is the only one in Earl Ducie’s cabinet. The Geological Museum in Jermyn Street possesses an interesting series of this form, which are all from the same island. Grateloup found the large variety at Dax, in from the Island of Malta. 79 the “faluns bleus de Narrosse,” and adds that it is found like- wise at Paris, Montpellier ?, Bordeaux, and the Vicentin: Des- moulins adds St. Paul-trois-Chateaux (Drome) as another locality. Genus ConocryPus (Agassiz, 1839). Test thick, hemispherical or oval, and always much elevated ; ambulacral areas above long, wide, converging at the summit, a little contracted below ; mouth median, symmetrical, pentagonal, and surrounded by five large lobes ; base flat, basal portion of the ambulacra with poriferous zones around the mouth-opening ; anus inframarginal, sometimes transversely oblong. The spe- cies are all fossil, and belong mostly to the tertiary rocks : one is found in the Maestricht chalk. This genus is nearly allied to Echinolampas. The character upon which M. Agassiz relied as diagnostic between Conoclypus and that genus, the direction of the anus, which is stated* to be elongated in the antero-posterior diameter in Conoclypus, and in the transverse diameter in Echi- nolampas, does not hold good in all the species. Conoclypus plagiosomus, Agassiz. Syn. Conocyplus plagiosomus, Agassiz and Desor, Cat. rais., Ann. Sc. Nat. 3rd series, tom. vii. p. 168. Test thick, large, highly convex; border acute ; outline round, inclining to oblong, being slightly compressed on the sides ; ambulacral areas narrow, even with the interambulacra ; pori- ferous zones very narrow; the inner and outer pores nearly equal in size, and extending through three-fourths of the areas; base concave; mouth nearly central, with large oral lobes ; anus large, transversely oblong and inframarginal. - Dimensions.—Antero-posterior diameter 6 inches, transverse diameter 5-8, inches, height 3 inches. Description.—This noble Urchin has been mistaken for C. conoideus, Lamk., as in form, size, and some of its general cha- racters it resembles that type species ; but the eye of the prac- tised zoophytologist detects, in the structure and narrowness of the poriferous zones, an organic character sufficient to enable him to separate it from that species. The general outline of the base is round, inclining to oval from the gentle compression of the sides thereof ; the dorsal surface is much elevated and highly convex, and the vertex is situated in front of the centre of the dome ; the ambulacral areas are nearly one-fourth the width of the interambulacral areas at the border, and are level with them ; they are nearly of a uniform width throughout, becoming lan- * Ann. Se. Nat. tom. vii. p. 167. 80 Dr. T. Wright on Fossil Echinoderms ceolate at their upper fifth: the poriferous avenues are very nar- row, and extend three-fourths of the distance between the apex and the border : the pores in the avenues are only about one line apart, and are united by short slits directed obliquely upwards and inwards at nearly equal spaces apart from the base to the apex ; the pores in the outer and inner series in each zone are about the same size throughout : the narrowness of the poriferous avenues forms a very important character in this species, by which it is distinguished from an allied form, C.conoideus. The interambulacra are of a triangular form ; the antero-lateral are the smallest, and the postero-lateral and single interambulacrum of about the same size are the largest: the apical disc is small, and situated nearer the anterior than the posterior border, which occasions a slight difference between the angle of inclination of the anterior and posterior sides of the test: the centre of the disc is occupied by a prominent button-like spongy madrepo- riform body, around which the genital and ocular plates are arranged, but their lines of suture can only be distinguished in weathered specimens, or by removing the superficial layer of the plates. The entire surface of both areas is covered with tuber- cles, very much alike both as regards size, form, and irregularity of arrangement ; the only parts exempt from tubercles are the interporiferous septas of the avenues: the base is concave: the mouth is situated in the centre of the disc, and is surrounded by five large prominent lobes: the ambulacra form petaloid depressions between the oral lobes, in which a number of pores are clustered together in pairs. The anus is a large, transversely oblong opening, placed immediately beneath the posterior mar- gin ; from it to the mouth an elevated ridge of the test runs : the single interambulacrum is slightly produced posteriorly where the anus teminates: the tubercles are larger, and placed at greater intervals apart on the base than on the dorsal surface : the marginal fold of the test forms an acute angle, and on the border thereof the tubercles are clustered closer together in greater numbers, with smaller interspaces between them, than in any other part of the skeleton. Affinities and differences.—This species very much resembles in form and size C. conoideus, but it is readily distinguished from it by the following characters : the ambulacral areas are smaller, the poriferous zones are narrower, and the outer and inner pores of each pair are nearly of the same size, whilst the septas between the pores are thicker; the dorsal surface is not so much ele- vated, the base is concave, the anus is large and transversely oblong, and the mouth possesses very prominent oral lobes. Locality and stratigraphical range.—This Urchin was collected at Malta, from bed No.2. The fine specimen before us belongs from the Island of Malta. 81 to the Bristol Institution ; we possess one, through the kindness of M. Michelin, from the celebrated Urchin bed of Balistro (Cor- sica) ; it is found likewise in the “ Molasse du Cap Couronne prés Martigues.” (Michelin.) Family Spatancipaz. The general outline of the Urchins of-this family is oval, ob- long or cordiform, and they satisfactorily exhibit the bilateral symmetry of the Echinide. The mouth is anterior, bilabiate, and edentulous. The anal opening is posterior and supramar- ginal, and is closed by a complicated series of small plates. The apices of the ambulacral areas are united at the summit .of the test. The anterior smgle ambulacrum has a different structure from the antero- and postero-lateral pairs, and is in general lodged in a depression of the test, which extends to the anterior border forming the anteal sulcus; the test is extremely thin, and is covered with small tubercles which support hair-like spines ; besides these there are some larger crenulated and perforated tubercles which support large spines. There are two or four genital pores which are sometimes placed close together, but are in other genera apart. The eye-plates are five in number, and are placed at the apices of the ambulacra in a pentagonal form around the genital plates. We observe on the surface of the test of some Spa- tangide, certain delicate lines called fascioles, having a smoother appearance than the tubercular surface of the test ; they are fur- rows which are strewed with microscopic tubercles destined to carry very delicate spines, which, when seen under the micro- scope, appear to have the same structure as the Pedicellarie. The fascioles have a different disposition in each genus, and afford a good character in giving definitions of the same; when the fasciole surrounds the ambulacral petals like an undulating groove, as in Hemiaster, Schizaster, &c., it is said to be a peri- petal ; when it surrounds the single ambulacrum, as in Amphi- detus, it is internal ; when it extends along the sides, as in Schi- zaster, it is lateral; when it surrounds the circumference of the test, as in Pericosmus, it is marginal; when it is limited to the base of the anal opening, it is subanal. We find sometimes in the same genus more fascioles than one; thus the subanal and peripetal are frequently associated together. Genus Spatanevs (Klein, 1734). Urchins, in general large with a thin test, a convex dorsal sur- face, and the antero-lateral and postero-lateral ambulacral areas composed of larger: petals than in other Spatangide. The ante- 82 Dr. T. Wright on Fossil Echinoderms rior ambulacrum is lodged in a deep anteal sulcus; the upper part of the anterior border of the antero-laterals is obliterated towards the summit. Numerous very large crenulated and perforated tubercles are scattered over the surface of the ambulacral plates. They have a deeply grooved subanal fasciole; only four genital pores, the anterior pair more closely approached than the posterior pair. Five perforated ocular plates, arranged in the form of a pen- tagon, around the genital pores. A tube or hollow cone at the internal part of the single interambulacrum. A large vertical plate passing into a cone arises from the internal surface of the test upon the left side of the mouth, and is directed obliquely upwards and backwards. The species are living or fossil in the tertiary rocks. Spatangus Hoffmanni, Goldfuss. Syn. Spatangus Hoffmanni, Goldf. Petrefacta, Band i. p. 152. tab.47. fig. 3 a,b,c; Desmoulins, Etudes sur les Echinides, p. 398. no.35; Grateloup, Mém. Echinid. Foss. tab. 1. fig. 8. p. 73; Agassiz and Desor, Ann. Sc. Nat. tom. vii. p. 7. Echinus ( petrefactus), Scilla, Corp. Mar. pl. 10. fig. 1. Test convex, depressed anteriorly, elevated and carinated posteriorly ; antero-lateral and postero-lateral interambulacra with numerous large, perforated and crenulated tubercles, surrounded by deep sunken areolas ; base convex, the postero- lateral areas with large tubercles ; interambulacrum forming a tumid projection at the base; mouth and anus large; mar- ginal fold acute ; the pores in the zones large, disposed in wide-set pairs. Dimensions. — Antero-posterior diameter 2%, inches, trans- verse diameter 2 inches; height anteriorly ;4ths of an inch, height posteriorly }4ths of an inch. Description.—The characters of this form of Spatangus are so prominent and well defined, that one is astonished that between the time of Scilla, who first figured it, and that of Goldfuss, who first described it, no zoophytologist should have become its historian. The dorsal surface of the test is broad, convex, and depressed anteriorly, and narrow, elevated, and carinated posteriorly ; the ambulacral areas are well defined, the single ambulacrum with its rudimentary pores is lodged in a wide but shallow anteal sulcus, and there is a flattened plateau between the sulcus and the apical disc; m this region the obsolete pores are clearly seen: the antero-lateral ambulacral areas extend outwards at an angle of 24° from a transverse line drawn through the apical I he Oe a eee re es from the Island of Malta. 83 disc*: the posterior poriferous zone extends two-thirds of the distance between the disc and the border; the anterior zone commences much farther from the dise above, but extends as far as the posterior zone below; thus in the specimen before us, there are fourteen pairs of pores in the posterior, and only nine in the anterior zone: the postero-lateral ambulacral areas ex- tend backwards, and towards their termination they curve grace- fully outwards ; the angle they form at the transverse line at the disc is 62°, and there are twenty pairs of pores in each of the zones. ach of the interambulacral areas presents peculiar characters ; the antero-lateral pair are the smallest, and the pos- tero-lateral are the largest; they are both remarkable for the tubercles they support on their dorsal surface ; in the anterior pair there are nine, and in the posterior pair there are fourteen of these tubercles on each side of the test, which are sculptured out of the substance of the plates; as they do not project beyond the general surface of the shell, each tubercle is seated on a cylinder, which is surrounded by a deep, wide depression : as these perfo- rations are not arranged with much regularity, the test has the appearance of having been bored by some marine mollusk. The tubercles themselves, in proportion to the size of the sup- porting cylinder and encircling entrenchment, are small and per- forated; the single interambulacrum is narrow and elongated, and rises in the mesial line into a prominent elevated ridge; the posterior border is obliquely truncated downwards and inwards, in the upper part of this space the large anal opening is situated ; below, the interambulacrum forms another prominence marked by two concave depressions on each side thereof, from which a wide, gently sloping central space occupies the middle of the ventral sur- face, having the large transversely-oblong mouth-opening with its projecting posterior lip occupying the anterior third of the base ; on the sides of this sloping central space the basal portions of the postero-lateral interambulacra are thickly studded with large slanting perforated tubercles, arranged with much regu- larity in this region, and a few smaller tubercles are scattered over the basal portion of the antero-lateral pair; the crescentic depressions below the anus have each a group of perforated tubercles, and between them and the smooth central concave portion of the base is the subanal fasciole, which forms a trans- verse band in the middle, and a crescent on each side, the upper * It may be as well to state, that we have adopted this mode of mea- suring the amount of divergence of the antero-lateral and postero-lateral areas rather than the vague expressions formerly in use. The angle is measured from a transverse line which cuts the longitudinal axis at right angles at the apical dise; we have found the degree of divergence to be very uniform in each species. 84. Dr. T. Wright on Fossil Echinoderms cornua of which approaches the anal opening ; below the fasciole there is another group of small perforated tubercles and a copious granulation ; the crescentic depressions, subanal fasciole, and this group form together a triangle, the base of which lies before the anus, and its apex points towards the mouth ; around this opening five pair of short poriferous zones indicate the termination of the ambulacral areas. Affinities and differences.—The form of the ambulacral areas, the shortness of the anterior poriferous zone, and the size and depth of the areolar spaces around the cylinders of the large tubercles, together with the carinated elevation in the middle of the interambulacrum, form a group of organic characters which sufficiently distinguish this species from its congeners. In Spa- tangus Desmarestii, which is found with S. Hoffmanni in the same beds in Westphalia, the size of the test, the absence of very deep areolas on the dorsal surface, the equal length of the pori- ferous zones of the anterior ambulacra, and the much smaller tubercles at the base, easily enable us to distinguish it from S. Hoffmanni. Stratigraphical range and localities.—It is found at Malta in bed No. 4, the calcareous sandstone, and in Westphalia; it has been collected from the Miocene at Doberg near Biinde, and at Astrapp near Osnabruck. Spatangus De Konincki, Wright, n. sp. Test cordate, depressed before, elevated behind by the develop- ment of dorsal and basal median carine on the single inter- ambulacrum ; ambulacral areas short and broadly petaloid ; anteal sulcus slight; depression of the single ambulacrum inconsiderable ; several large tubercles between the petaloidal ambulacra; posterior border obliquely truncated downwards and forwards ; anal opening large and circular ; basal tubercles of moderate size; basal portions of the postero-lateral ambu- lacra form two smooth tracks destitute of tubercles between the posterior border and the mouth. Dimensions.—Antero-posterior diameter 1,5, inch; transverse diameter 1,4, inch; height at the interambulacrum 32 ths of an inch. Description.—An imperfect specimen of this Urchin was at first mistaken for a small variety of Spatangus Desmarestii, Goldf., and entered under that name in the list of fossils from bed No. 2. Having lately obtained a better specimen of this form, we are now enabled to give a description of it, which will be found to differ in many essential points from that species, to which it was at first referred. The test is regularly cordate, from the Island of Malta. 85 slightly flattened at the cheeks, bulging out at the sides, and from thence tapering abruptly towards the posterior border, where it is truncated obliquely downwards and forwards; the anterior part of the test is flattened and depressed, and the pos- terior portion much elevated, from the circumstance of the single interambulacrum forming two prominent ridges, one on the dorsal, and the other on the basal surface, which gives increased depth to the test, tilts it up, and forms an inclined plane of the dorsal surface. The petaloidal ambulacra are short, broad and leaf-like ; the anterior pair are slightly flexed forwards and form an angle of about 15°; their anterior poriferous zone is nearly as complete as the posterior zone, which contain respectively sixteen and eighteen pairs of pores ; the posterior pair form two oval leaflets, the bases and apices of which are nearly equally curved, and closed with pores, having about eighteen pairs of pores in each zone ; they describe an angle of about 60°. The single anterior ambulacrum makes a very slight depression on the upper part of the anterior region, and the anteal sulcus formed by it is inconsiderable when compared with other con- generic forms ; the anterior and lateral pairs of interambulacra carry a few large crenulated and perforated tubercles on the upper part of their dorsal surface ; on the anterior pair there are from seven to eight, and on the posterior pair from four to five of these tubercles, which are neither so large nor yet have such deep areolas as their homologues in S. Hoffmann. The single posterior interambulacrum is narrow, but greatly developed in the vertical diameter ; above, a blunt prominent ridge commences near the apical disc and extends to the posterior border ; below, another ridge commences a short distance from the truncated portion of the border, and extends to the centre of the mouth ; the base is slightly convex from side to side, besides being raised in the middle of its posterior part by the ridge just alluded to. The tubercles on the basal portions of the anterior and posterior interambulacra are not very large, but are disposed with great regularity ; those on the ridge-like prominence of the single interambulacrum are arranged in lines which radiate in all directions from a point ; those on the pairs gradually decrease in size from the mouth to the border; between these two groups of tubercles there is on each side a smooth track, corresponding with the course of the postero-lateral ambulacra from the border to the mouth : the anus is large and circular, and occupies the upper part of the posterior border ; the subanal fasciole is de- nuded; the mouth is likewise large and transversely oval, and is situated near the anteal sulcus. The apical disc is excentral, being situated about the anterior part of the middle third of the test ; it is small, and is perforated with four genital holes. The 86 Dr. T. Wright on Fossil Echinoderms ‘superficial layer of the calcareous plates, which carries all the fine sculpture of the test, is almost entirely denuded from the dorsal surface ; one or two fragments alone remain to show that the tuberculation was minute and close-set. ‘ Affinities and differences.—This species is distinguished from S. Hoffmanni by the excessive elevation of the posterior part of the test ; by the shorter, wider and more oval form of the peta- loid ambulacra; by the poriferous zones of the anterior pair being more complete ; by the large dorsal tubercles being smaller and fewer in number ; by having a less impressed anteal-sulcus ; a convex base, with smaller tubercles ; a ridge-like projection, with a regular tuberculation of the basal portion of the inter- ambulacrum, with smooth naked ambulacral tracks on each side thereof. From S. Desmarestii it is distinguished by its short, broad, petaloidal ambulacra, which are long and attenuated in S. Desmarestii ; by the greater size, number and regularity of the large dorsal tubercles, which are few, small and scattered in S. Desmarestii ; the posterior region is not at all elevated in S. Desmarestii, and the anus is transversely oblong, whilst in S. De Koninckii the posterior part is much elevated, and the anal opening is round. S. Desmarestii has a few groups of large tubercles on the upper part of the single interambulacrum, which are entirely absent both in S. Hoffmanni and S. De Koninckii. The basal region is so much covered up with matrix in the specimen of S. Desmarestii before us, that we cannot institute a comparison between this portion of its test and that of S. De Koninckit. Locality and stratigraphical range.—The two or three speci- mens we have seen in the Karl Ducie’s cabinet were collected from the clay bed No. 2 at Malta; they have all a deep ferru- ginous colour, and are not well preserved. We dedicate this species to our friend Dr. De Koninck of Liége, the learrfed author of several memoirs on the paleontology of the carbo- niferous rocks of Belgium. Genus Brissus (Klein, 1734). Form oval; the ambulacral summit excentral, and situated near the anterior border ; the antero- and postero-lateral ambu- lacral areas straight, and lodged in shallow depressions of the test ; the anterior pair are nearly transverse, the posterior pair deviating slightly from the longitudinal direction. The single ambulacrum very simple in structure; no anteal sulcus; the peripetal fasciole very sinuous; mouth large, labiate, and near the anterior border ; anal opening large, situated in the middle of the posterior surface ; the subanal fasciole approximated close reduced Ig uted by Hulbnandel & Walton Isa latus , Wright De 2.8 oblongus , Wright 3.a—¢ Schizaster Parkinsoni, Defrance from the Island of Malta. 87 to the anus. Four genital pores, the anterior pair smaller and nearer each other than the posterior pair. The madreporiform tubercle situated between the posterior genital openings ; five perforated ocular plates placed before the genital pores and alter- nating with them. This genus contains a greater number of living than of fossil species; the existing forms are limited to the seas of warm latitudes; the fossil species are found only in the tertiary rocks. Brissus latus (Wright, n. sp.). Pl. V. fig. 1 a-c. Test convex and much depressed above ; transverse and antero- posterior diameters nearly equal ; ambulacral areas of nearly equal length ; the single ambulacrum lodged in a deep anteal sulcus ; antero-lateral pair curved gently forwards; peripetal fasciole very zigzag and angular; apical disc ;%,ths of an inch before the centre of the disc; base slightly convex; sternal process of the single interambulacrum raised before the anus, having a central elevated ridge and numerous large tubercles arranged in regular order on its surface; subanal fasciole enclosing a space 1,% inch in diameter ; anus situated in an oblique truncation below the margin ; mouth ;>ths of an inch from the anterior border; the large tubercles of moderate size. ’ Dimensions.—Antero-posterior diameter 451, inches, transverse diameter 3%, inches ; height at the vertex | inch. Description.—This Brissus is readily recognized by its broad and depressed dorsal surface ; the ambulacral areas form deep depressions in the test ; the single ambulacral area lies in an in- considerable valley on the dorsal surface, but forms rather a deep anteal sulcus ; the antero-lateral pair curve gently outwards and forwards, forming an angle of 21°, with the transverse line at right angles with the longitudinal axis of the test ; the postero- lateral pair are directed obliquely backwards at an angle of 55°; both pairs lie in rather deep valleys, and the poriferous zones contain from twenty-eight to thirty pairs of pores in each avenue. The peripetal fasciole (1 a) makes an angular zigzag track, closely embracing the apices of the ambulacral areas. In the space which it bounds on the fore part of the shell, having for its base the antero-lateral areas, and its apex the anteal sulcus of the single ambulacrum, a number of large perforated tubercles set on cre- nulated eminences are arranged in groups (1c), the areolas of these tubercles are surrounded by small granules, and amongst them smaller tubercles are interposed; a few large tubercles occupy the angles between the apices of the antero-lateral and postero- lateral pairs, and likewise in the angle formed between the pos- VOL. H. ; H 88 Dr. T. Wright on Fossil Echinoderms tero-laterals themselves ; the rest of the dorsal surface is covered with small tubercles closely set together ; each tubercle is perfo- rated and raised on a crenulated eminence (1c), and surrounded by a smooth depressed areola; the base is slightly convex; the sternal portion of the single interambulacrum is rather prominent be- hind, but slopes gently towards the mouth; it has an elevated ridge in the centre, and is covered with tubercles of a larger size than those of the upper surface, and which are arranged in re- gular rows. The subanal fasciole is of considerable extent, it forms a semicircle which passes across the most prominent part of the base, and sends its cornua upwards at a considerable distance from the anus ; the basal portions of the pairs of the interambulacral areas are covered with tubercles similar to those on the sternal part ; a naked track corresponding to the postero- lateral areas separates these tuberculated portions of the base. The mouth is situated near the anterior border, it is widest in the transverse diameter, and has a thick projecting under hip ; the terminations of the ambulacral areas surround the mouth, and form poriferous zones around that opening: the anus is situated beneath the margin in an oblique truncation of the posterior border ; the opening is much crushed in our specimen, so that its form is not discernible. The apical disc (1 4) is placed near the centre of the back, about ;4,ths of an inch before that point : the madreporiform tubercle is small and pyriform, and is situated behind the four genital pores: the margin of the shell is thin and acute. Affinities and differences.—The breadth of the test and the de- pression of the dorsal surface thereof, with the curve forwards i the ambulacral areas, and the depth of the anteal sulcus, form a group of characters by which Brissus /atus is readily distin- guished from its congeners. Out of the seven fossil species, registered but not described in Agassiz and Desor’s Catalogue, two only are figured, and for this reason we are unable to make a comparison with them. Locality and stratigraphical range—Only one specimen of this species, in the Earl Ducie’s cabinet, was collected from bed No. 1, the Gozo marble, at Malta, so that we conclude the species is rare, as it is not contained in either of the other collections of Maltese Urchins examined by us. The Jermyn Street Museum contains a specimen, which is supposed to be identical with this form. Brissus imbricatus (Wright, n. sp.). Test oblong, much depressed ; no anteal sulcus ; peripetal fasciole narrow, lodged in a groove; rest of the dorsal surface frac- tured ; base convex ; mouth large, and situated near the ante- from the Island of Malta. 89 rior border; sternal portion of the interambulacrum with a regular ornamentation. The subanal fasciole very near the anus is heart-shaped and narrow ; it encloses rows of tubercles which are arranged in radii in regular order; before the fasciole the test forms a projection, and from the summit thereof, rows of tubercles arranged in straight lines extend towards the mouth, increasing in size as they approach that opening; the basal portions of the other mterambulacral areas are covered with scale-like imbricated plates, each car- rying an oyal eminence with a crenulated summit, and a tubercle placed at the anterior side of the oval eminence ; these tubercles are all regularly arranged in rows which have a direction forwards and outwards : the postero-lateral ambu- lacra form a naked space, which separates the imbricated basal portions of the pairs of interambulacra from the ornamented sternal portion of the single one. The anus is large and situated at the posterior border ; both this opening and the mouth are much injured. Dimensions.—Antero-posterior diameter 3%, inches, transverse diameter 3 inches, height ,8,ths of an inch. Description —The detailed diagnosis given of this species con- tains nearly all that we can describe of this Brissus, for, with the exception of a small portion of its anterior part preserving a por- tion of the peripetal fasciole, all the rest is absent; the regu- larity in the arrangement of the tubercles at the base constitutes a characteristic feature of this form, and the imbricated style of the basal plates, resembling the tegumentary membrane of a placoid fish, gives value to the specific name. ; Affinities and differences.—The order and symmetry of the de- coration of the sternal portion of the interambulacrum, the heart-shaped subanal fasciole, with its broad band of microscopic granules, and the leaf-like tuberculated expansion which extends from the apex of the fasciole, are very characteristic of this spe- cies; if to these we add the imbricated style of the plates occu-. pying the sides of the base, and the oblique way the tubercles are set on their oblong bases, we have an assemblage of organic characters by which B. imbricatus may be readily distinguished from its congeners. The form of the test, the size of the tubercles, the symmetry of the subanal rosette, formed by radii of tubercles, and encircled by a broad fasciole, readily separate it from B. latus, with which it is associated in the same stratum. Locality and stratigraphical position.—This species was col- lected from bed No. 1, the Gozo marble, at Malta : it is the pro- perty of the Bristol Institution. H2 90 Dr. T. Wright on Fossil Echinoderms Brissus oblongus (Forbes MSS., n. sp.). Pl. V. fig. 2 a-c- Test oblong, depressed before, elevated behind; dorsal surface convex ; anterior border rounded, with a slight anteal suleus ; antero-lateral ambulacral areas slightly bent forwards, and nearly forming right angles with the longitudinal axis; pos- tero-lateral ambulacra make an angle of 68°; the anterior are shorter than the posterior pair ; posterior border produced and truncated : anus large, oval, and placed high up : base convex, sternal portion prominent, greatest width across the base of the postero-lateral ambulacra. Dimensions.—Antero-posterior diameter 2,', inch, transverse diameter 1,9, inch, height 1,/; inch. Description.—This small Brissus has an oblong form, and is rounded before and truncated behind ; the anterior half of the test is more depressed than the posterior half ; the single inter- ambulacrum rises into a ridge-like eminence on the back, and the sternal portion thereof is much inflated at the base, so that the greatest height of the test is in this region. The antero-lateral am- bulacra (2 a) are shorter than the posterior pair, and are extended across the test nearly at right angles to the longitudinal axis ; the postero-lateral ambulacra are longer than the anterior, and form angles of 68°; the petaloid portions of both areas are depressed ; the anterior pair have eighteen pairs of pores, the posterior pair have twenty-four pairs of pores in their poriferous zones: the single ambulacrum is not lodged in a rudimentary anteal sulcus, and is nearly on a level with the contour of the test, the front and cheeks of which are convex, with four groups of larger tuber- cles in this region ; the sides slope obliquely downwards to the border, which is obtuse: the single interambulacrum is raised into a ridge above, and produced into a blunted caudal process, ob- liquely truncated behind: the base (2d) is convex, chiefly from the arched form which the sternal portion of the interambulacrunt assumes : the mouth is large, near the anterior third of the base : the anus is of an elliptical form, and occupies more than the upper half of the truncated portion of the posterior border. The peripetal fasciole (2 a) closely embraces the ambulacral pairs, and makes three angles in passing over the anterior interambulacra ; the subanal fasciole (2 4) describes a heart-shaped outline, its base is near the anus, and its apex touches the prominent point of the sternum ; the space thereby circumscribed is filled with tubercles having a definite arrangement. The apical disc is small, with four genital pores, the posterior pair being much larger than the anterior pair; the tubercles (2c) on the anterior interambulacra are much the largest, those on the rest of the back are small and very uniform in size, whilst those on the sternum and the sides FLV, nted by Hulhy Pr. t lith € R Bone de] eh S ee] rc: s = ce) rT ri} ra 3 fie = ‘oh ‘on*ab HES a 2 2 9 3B = - “4 DO « OH i] Yy oO yg, iS 3) d Ci Oodoe?d ee aed oe fa] 1 1 sy from the Island of Malta. 91 of the base are intermediate in size; the basal tracts of the am- _bulacral areas are destitute of tubercles; as they approach the mouth they are again perforated with a single row of holes; those of the antero-laterals extend as far as the border, whilst the single and posterior pair have only two or three pairs of their plates perforated. Genus Brissoprsis (Agassiz, 1840). Form elongated, subcylindrical ; ambulacral areas straight, short, and wide, converging near the summit of the test ; peri- petal fasciole flexuous, closely surrounding the ambulacral areas ; two or four genital pores, the posterior larger than the anterior pair ; five ocular plates disposed nearly equally apart in a penta- gonal form around the genital openings; subanal fasciole wide, and situate at a considerable distance below the anal opening ; single ambulacrum lodged in an anteal sulcus ; the basal portions of the ambulacra are wide and naked ; the tubercles are very uniform in size, and are crenulated and perforated. Three living species ; the rest are fossil in the tertiary rocks. Brissopsis Duciei (Wright, n. sp.). Pl. VI. fig. 1 a-e. Test oblong, depressed anteriorly, elevated posteriorly ; apical dise central; ambulacral areas forming concave depressions ; single ambulacrum the longest and widest ; antero-lateral pair straight, angle of inclination 34°; postero-lateral shorter, angle of inclination 55°; peripetal fasciole broad and undulating ; anus oval, large, situated high on the border ; base concealed ; dorsal tubercles small, nearly of a uniform size, except on the sides and the anterior part, where they are larger. Dimensions. — Large specimen. Antero-posterior diameter 3,5 inches, transverse diameter 3,4 inches: height cannot be - accurately measured. Small specimen. Antero-posterior diameter 1,9, inch, trans- verse diameter 137 inch; height over the middle of the single ambulacrum ;%ths of an inch, at the highest point of the dorsal region 1,4, inch. Description.—This beautiful Urchin is one of the most typical . forms of the group to which it naturally belongs. The test is oblong and inclined, from the height of the anterior third being less by ;4;ths of an inch than the posterior third; the ambu- lacral areas are all well developed, and arranged in the form of a St. Andrew’s cross ; as the apical disc is situated near the centre of the body, the regularity of their arrangement forms a con- spicuous character of this species. The anterior ambulacrum (1 a) is concave, and makes an inconsiderable anteal sulcus ; there is a 92 Dr. T. Wright on Fossil Echinoderms single row of pores, flanked by a row of tubercles on each side, with a space between filled by a microscopic granulation ; it is abruptly bounded below by the fasciole, and terminates at the disc in a blunt lancet-shaped apex. The antero-lateral ambulacra in the large specimen are ;3;ths of an inch longer than the pos- terior pair, and form an angle of 37° with the transverse line through the disc ; they are round at the base and blunted at the apex, and the anterior side is more rounded off than the pos- terior for the reception of the apex of the ambulacrum ; in the anterior zone there are twenty, and in the posterior zone twenty- four pairs of holes. The postero-lateral pair describe an angle of 55°; both pairs form concave valleys ; the pores in the zones are of the same size, and are pierced so wide apart (1 ¢) that the pores of each pair are nearly as distant from each other as the width of the space which separates the two avenues; in the anterior am- bulacral avenues there are twenty in the anterior and twenty-four in the posterior zone; in the posterior pair the numbers are twenty-two before and eighteen behind. The peripetal fasciole (1 e) has an unequal width in different parts of its track ; it is narrow where it passes over elevations of the test, or is bent into angles, and becomes wider in other parts of its course. The apical dise (1 a) is small, heart-shaped and central ; the two anterior genital holes are smaller and placed closer together than the posterior pair; the five eye-holes as usual are situated at the summit of the ambulacral apices: the madreporiform tubercle occupies the surface of the posterior triangular genital plate. The anus is a large oblong opening, situated in the upper half of the posterior border, at the distance of ths of an inch from the fasciole in the small individual. The base in both specimens is concealed ; the tubercles (1d) are small, crenulated and perforated, and nearly of the same size ; a few larger ones occupy the sides of the an- terior ambulacral sulcus ; the sides of the ambulacral areas and as much of their basal portions as is exposed are destitute of tubercles. Affinities and differences.—Brissopsis Duciei is readily distin- guished from the other forms of this genus met with in the Maltese beds, by the full development of its ambulacral areas, their straightness, width and depth. The double crescent formed by the ambulacral areas in B. erescenticus is a sufficient character by which it may at a glance be distinguished from B. Duciet. Locality and stratigraphical position—This species was col- lected from bed No. 1, the Gozo marble, at Malta, where it is rare ; the two specimens before us are the only ones we have seen. We dedicate this fine species to the Earl Ducie, whose valuable collection of Maltese fossils has added to our previous knowledge of the palzontology of the island, and whose geological map of ~~ ed from the Island of Malta. 93 Malta so well exhibits the distribution of the various beds with their faults and denudation. a tee Brissopsis crescenticus (Wright, n. sp.). Pl. VI. fig. 2 a-c. Test oblong, rounded before and truncated behind ; flattened on the dorsal surface, and deeply indented by the ambulacral areas; the ambulacrum forms an anteal sulcus; the anterior and posterior ambulacra on each side form two lateral crescents that abut at the longitudinal line; the antero-lateral pair are the longest and widest, they curve forwards and backwards, and the posterior pair curve backwards and forwards; the anterior pair form an angle of 45°, the posterior pair an angle of 65°; the apical dise lies in a depression formed by the confluence of the apices of all the ambulacra ; the posterior border is squarely truncated, with the anal opening in its upper angle ; the base is convex, with few tubercles and wide naked spaces formed by the basal portions of the ambulacra ; the mouth is situated in the anterior third. Dimensions.—Antero-posterior diameter 1,5 inch, transverse diameter 1,4; inch, height {ths of an inch. Description.—The most remarkable feature in this species consists in the mode of arrangement of the ambulacra ; the ante- rior and posterior areas of each side curve in opposite directions and form crescents, the convexities of which are directed towards the middle line of the test, and give value to the name proposed. The antero-lateral pair form an angle of 45°; they are about the same length as the posterior pair, but are a little broader and are more divergent : there are nineteen pairs of holes in the external zone, and fourteen in the inner; the posterior pair are nearly parallel with each other, and have a slight curve for- wards to form the posterior horn of the crescent; they are not so much developed as the anterior pair; the external zone of holes contains fifteen pairs, but the inner zone (2c) is imperfectly developed, from their close approximation to those of the oppo- site area: the apical disc is small ; the four genital holes are large, the anterior pair being more closely approximated than the posterior pair ; it 1s situated nearer the anterior than the posterior border and lies in a confluent depression, in which the apices of all the areas freely converge. The single ambulacrum is rather longer, but not so wide as the anterior pair ; its lateral row of single holes, with their accompanying tubercles, are small and indistinctly seen, and it forms an inconsiderable anteal sulcus : the posterior border is squarely and obliquely truncated, and in its upper part near the dorsal surface is the large anal opening: the base is rather convex; the sternal portion of the single interambu- 94; Dr. T. Wright on Fossil Echinoderms lacrum is slightly prominent, and ornamented with a few rows of rather larger tubercles disposed in zigzag lines: the basal tracks of the ambulacral areas are entirely naked, and where they terminate around the mouth five petaloid poriferous radii are observed. The mouth, of moderate size, is in the anterior third ; the peripetal fasciole is narrow and indistinct; the subanal fasciole is much broader, and remote from the anus, but the test is unfortunately broken in this region ; the tubercles are nearly all of the same size, but a few larger ones occupy the sides, front, and base. Affinities and differences.—The flatness of the dorsal surface, the deep depressions made by the petaloid portion of the am- bulacral areas, and the double crescent formed by them, readily distinguish B. crescenticus from its congeners. So few fossil species of this genus have been figured or described, that we can only compare it with the other forms obtained from the same bed, from both of which it differs in many well-marked characters. Locality and stratigraphical position.—It was collected from bed No. 4, the calcareous sandstone at Malta, where it is rare. Genus Hemiaster (Desor, 1847). Urchins with a high and much inflated test ; ambulacral sum- mit nearly central ; the petaloid portions of the ambulacral areas situated in depressions more or less deep ; the antero-lateral are in general much longer than the postero-lateral pair; the peripetal fasciole only surrounding in an angular manner the ambulacral star. This genus differs from Micraster in all the species having a more inflated body with a peripetal fasciole ; from Brissopsis in having the postero-lateral ambulacra in general much shorter, and the anterior and posterior pairs more unequal in length, and likewise in having no subanal fasciole. A very few species are found in the tertiaries, the majority belonging to the cre- taceous rocks. Hemiaster Grateloupi (Sismonda sp.). Syn. Schizaster Grateloupi, E. Sismonda, Echin. Foss. Piem. p. 27. tab;.2. Hemiaster Grateloupi, Desor, Ann. Sc. Nat. tom. vill. p. 19. Test orbicular, convex above and below, with tumid inflated sides : the single ambulacrum short, shallow and narrow; the antero-laterals long, deep and diverging ; angle of inclination 25°; the postero-lateral pair slightly curved inwards ; angle of mclination 62°; both pairs lie in deep depressions : the peri- petal fasciole broad and undulating: the single interambu- lacrum forming a dorsal ridge : posterior border abruptly trun- from the Island of Malta. 95 cated: anal opening high near the upper surface : apical disc small and central. Dimensions.—Antero-posterior diameter 258, inches, transverse diameter 3 inches, height 1,8, inch. Description.— The orbicular form and inflated sides of this Urchin, with its large, deep, diverging ambulacra, and greater dia- meter in the transverse than in the longitudinal direction, impart to it an air which widely distinguishes it from other Hemiasters. The single ambulacrum is narrow and shallow, and forms an in- considerable anteal sulcus, which measures 1, inch in length from the apex to the fasciole; it has a single row of lateral holes and accompanying tubercles of small size placed near each other within, and the holes only at considerable distances apart without the fasciole. The antero-lateral ambulacra are rather wider and much deeper than the single area ; they are 1,3, inch in length, and are directed forwards and outwards, forming an angle of 25°; the walls of the depression are formed by the poriferous zones, and the base by the intervening smooth space between them: the postero-lateral ambulacra are directed obliquely backwards and gently curved inwards ; they are 1 inch long and form an angle of 62°: the peripetal fasciole closely embraces the base of the areas, and maintains a nearly uniform width throughout its course: the test is very much inflated an- teriorly and laterally, and its posterior border is abruptly trun- cated: the single interambulacrum is elevated into a ridge, which rises between the two posterior ambulacra, at the termi- nation of which the anal opening is situated : the test is covered with small, nearly equal-sized tubercles, which are larger on the fore-part, cheeks, and sides than elsewhere: the apical dise is small, and lies in a depression at the centre of the test, the apices of the interambulacra rising into little eminences around it: the base is entirely concealed by the matrix. : Affinities and differences.—This large species differs so much from its congeners in its breadth, in the depth and divergence of the antero-lateral ambulacra, which are likewise slightly curved forwards, in the length and depth of the posterior pair, which equal the single ambulacrum in length, in the breadth and extent of the peripetal fasciole, and the perpendicular truncature of the posterior border, with the general tumidity of its sides, that it is readily distinguished from them. Locality and stratigraphical position.—It was collected from bed No. 4, the calcareous sandstone at Malta, and is one of the few tertiary Urchins in our cabinet; it is the only specimen of the species we have seen. 96 Dr. T. Wright on Fossil Echinoderms Hemiaster Cotteauit, Wright. Pl. VII. fig. 2 a-d. Test orbicular, globose, much inflated, declining anteriorly, ele- vated posteriorly, the interambulacrum forming a prominent carina which terminates in a tail-like process above the anus ; posterior border obliquely truncated ; ambulacral areas deeply sunk; an anteal ambulacrum forms the sulcus in the anterior border; antero-laterals long, and inclined to 45°; postero- laterals one-half the length of the anterior pair, inclined to 57°; apical disc nearly central; peripetal fasciole broad and undulating ; anus high under the carinal process; tubercles larger on the sides and base than on the dorsal surface ; mouth labiate near the anterior border. Dimensions.—Antero-posterior diameter 1} inch, transverse diameter 132 inch, height 134 inch. Description —This Urchin has a globose form, and is much inflated at the sides; the dorsal surface is convex, and declines much more rapidly from the apical disc to the anterior border, than from the disc to the posterior border. The ambulacral areas (2a) are all deeply sunk; the single ambulacrum is the longest, and forms a considerable anteal sulcus; the antero-lateral pair have a gentle double curve; they are ;%ths of an inch in length, and form an angle of 45°. The number of pores (2c) in the avenues is twenty-two pairs in the inner, and twenty-four in the outer zone; the postero-lateral pair are scarcely half the length of the anterior pair; they incline at 57°; their number of pores is ten and twelve pairs. The peripetal fasciole (2 d) closely embraces the ambulacral star; a naked track proceeds from the base of the antero-laterals to the mouth, indicating the course of the imperforate portion of the ambulacral areas: the rapid declivity of the anterior part of the test strongly contrasts with the inflated condition of the sides and the elevation of the in- terambulacrum ; from the centre of this area a ridge rises which is produced into a tail-like process, and beneath, the posterior border is scooped out, and truncated obliquely downwards and inwards. The anus is situated high up, immediately beneath the caudal prolongation ; the base is convex, and a partially naked space on each side of the sternal portion of the inter- ambulacrum, indicates the track of the basal portions of the posterior ambulacra. The tubercles of the upper surface (2 6) are smaller and more closely set together than those on the sides and base, where they are larger, wider apart, and more fully developed. They are perforated and uncrenulated, and surrounded by a circle of small tubercles. H. Cotteauii resembles Spatangus (Hemiaster) acuminatus, Goldf., but it is more globose, and its posterior half is neither so elevated, nor yet so wedge- PUVIL. Printed byHulhmandel & Walton Wright Wright Wright 4. a_b. Lenticulites complanatus,, Defrance. from the Island of Malta. 97 shaped as that species; the single ambulacrum is larger and wider, and the antero-lateral pair are more developed in the German than in the Maltese form; they resemble each other in the interambulacrum in both possessing a tail-like terminal process, and in having the posterior border obliquely scooped out ; they are both, likewise, Miocene Urchins, S. acuminatus being found in that terrain near Cassel and Dusseldorf (Ger- many), and at Bordeaux and Blaye (France). Affinities and differences.—The depth and length of the am- bulacral areas, with the great declivity of the anterior side of the test, and the post-discal carina, with its caudate-like process, serve to distinguish this species from H. Scilla. Locality and stratigraphical position—Collected from bed No. 4, the calcareous sandstone at Malta. We dedicate this species to our friend M. Cotteau, the learned author of ‘ Etudes sur les Echinides Fossiles du département de Yonne,’ who has most generously aided us in our studies, by contributing the types of many of his species to our cabinet for comparative in- vestigations. Hemiaster Scille, Wright, n. sp. Pl. VII. fig. 1 a-f. Syn. Spatangus crassissimus, Desmoulins, Etudes sur les Echinides, p- 394. no. 30. Echinus, Scilla, Corp. Mar. pl. 10. fig. 4. Test globular, higher behind than before; ambulacral areas short; single ambulacrum the longest, forming a deep sulcus on the anterior border; antero-laterals wide, diverging at an angle of 44°; postero-laterals not half the length of the ante- riors, forming an angle of 56°; both pairs form sulci on the sides of the test: posterior border squarely truncated down- wards and outwards: the anus high near the dorsum: base convex: mouth at the anterior third, with a large projecting under lip. Dimensions.— Antero-posterior diameter 1,%, mch, transverse diameter 1,7, inch, height 1,4, inch. Description.—Much confusion has arisen as to the identity of this Urchin, occasioned probably by the circumstance of Scilla having figured only the base of the test, and neglected to give either its profile or the dorsal surface. In M. Agassiz’s ‘ Pro- dromus’ it was entered as Micraster Goldfussti, but has been omitted from Agassiz and Desor’s ‘ Catalogue raisonné. M. Desmoulins identifies it with the Spatangus crassissimus of Defrance, but on referring to the origimal description * of that species, we find that Defrance’s species came from “la craie * Dict. Se. Nat. tom. 50. p. 96. 98 Dr. T. Wright on Fossil Echinoderms chloritée near Havre,” and as no species of Urchin known to us passed from the secondary to the tertiary epoch, we must reject the high authority of this most accurate naturalist, and consider the Urchin before us as distinct from S. crassissimus. The test inclines to an oblong form (1 ¢) ; it is higher behind than before, and declines more rapidly from the disc to the anterior border than from the disc to the anus. The ambulacral areas lie in deep depressions; the single ambulacrum (1e) is the longest, and forms an inconsiderable anteal sulcus ; the antero-laterals are ;‘,ths of an inch in length, and form an angle of 44°; the number of the pores (1 f) in the zones is fifteen and twenty: the postero-laterals are scarcely one-half the length of the antero-laterals ; they form an angle of 56°; the number of pores in them is respectively seven and ten : the peripetal fasciole is broad, but feebly marked, and closely embraces the bases of the areas: four sulci (1 a), nearly destitute of tubercles, mark the course of the ambulacra from the side of the fasciole to the mouth: the lateral interambulacra are rather inflated, and marked by five or six angular elevations (1 c) of the test: the single interambulacrum is elevated on the dorsum (1a), squarely truncated on the posterior border, and convex beneath: the small oval anus is situated very high up, about ;$,ths of an inch from the dise: the sternal portion of the interambulacrum (1 4) is convex and prominent, and is covered with close-set tubercles, arranged in lines, proceeding like radii from a central point of the base: the mouth has a large pro- jecting under-lip. The upper part of the shell is covered with small close-set uncrenulate tubercles (1d), which are larger and irregularly disposed on the front and base: the apical disc is small and nearly central: there are only two genital heles at the apices of the lateral ambulacra: the five eye-holes are very small. Whether one pair of genital holes may be a generic character of Hemiaster, we have not the means at present of de- termining, as most of our specimens of this group have the disc concealed ; but about the beautiful H. Sci//le now before us there can be no question. Affinities and differences.—The absence of the dorsal carina and caudal process serve to distinguish H. Scilla from H. Cot- teauit ; the latter is likewise a more globose and less elegant form of Urchin, and has the truncature of the posterior border down- wards and forwards, whereas in H. Scille the direction is down- wards and backwards. Locality and stratigraphical position.—Collected from No. 4, the calcareous sandstone at Malta, from whence the original spe- cimen figured by Scilla was obtained: this reason will suffice for the name we have given it. from the Island of Malta. 99 Genus Pericosmus (Agassiz, 1847). In addition to the general characters of Hemiaster, these Urchins have an arched arrangement of the peripetal fasciole and a narrow marginal fasciole, which can be traced round the anterior border, extending along the sides, passing beneath the anus, meeting its fellow from the opposite side, and thereby encircling the test. All the species of this small group have been obtained from strata of the Miocene age. Pericosmus latus, Desor. Syn. Micraster latus, Agassiz, Cat. Syst. p. 2. Pericosmus latus, Agassiz and Desor, Cat. raisonné, Ann. Se. Nat. tom. vi. pl. 16. fig. 1, & tom. viii. p. 19. Test cordate, broad, convex above, flat below; petaloidal ambu- lacra straight, deep-sunk and narrow; the posterior nearly as long as the anterior pair; apical discs central; peripetal fasciole closely embracing the ambulacra, with three arches across the single ambulacral depression ; marginal fasciole narrow, entirely surrounding the upper part of the border of the test. Dimensions.—Antero-posterior diameter 2,7, inches; trans- verse diameter 2,7, inches; height 1,3; inch. Description.—This rare type of one of the extinct genera of Spatangide was at first mistaken for a Micraster by Agassiz, and entered in his ‘Catalogus Systematicus’ under the name Mi- eraster latus ; the peripetal fasciole, however, readily distinguishes it from Micraster, and the marginal fasciole from Hemiaster. No doubt many mistakes will be committed regarding this Urchin, as these fascioles are exceedingly delicate, and not always pre- served: when they are absent, it then greatly resembles a Mi- craster ; but when the marginal fasciole is effaced, and the peri- petal remains, it then may be mistaken for a Hemiaster; for- tunately, in one of the specimens before us, the fascioles are both preserved, and their entire course can be traced. The test has a uniformly curved dorsal surface, with a regular cordate form, the base is slightly convex, and the posterior border is trun- eated. The petaloid portions of the ambulacral areas are straight, and lodged in rather deep depressions, extended ob- liquely outwards on the middle of the dorsal surface, in the form of a St. Andrew’s cross; the single ambulacrum lies in a deep wide depression, and forms a considerable anteal sulcus; at its apical portion only, there are from ten to twelve pairs of ambu- lacral plates, each perforated in the centre with a single hole ; in all the other plates in the area the perforations are obsolete ; 100. . Dr. T. Wright on Fossil Echinoderms the antero-lateral ambulacra, }4ths of an inch in length, are nearly straight, having only very slight f-shaped flexures, which curve forwards and outwards, making an angle of 35°: the two poriferous zones lie close together, in deep narrow depressions ; in each zone there are from twenty-four to twenty-six pairs of holes ; the space between the pairs of pores is only a little more than that which separates one row of pores from another, so that the pores lie nearly equidistant from each other in the sunken areas; the postero-lateral ambulacra are 33ths of an inch in length, and are extended backwards and outwards at an angle of 60°; there are from twenty to twenty-two pairs of holes in each zone, the rows of which, like those on the anterior pair, are nearly equidistant: the peripetal fasciole closely surrounds the posterior ambulacral pair, makes two angles on their sides, and crosses to the anterior pair, where it in lke manner forms two angles, then sweeps round the base, and passes in a straight line along the anterior side; from it three branches proceed in- wards, which arch over the single ambulacrum, describing angles as they advance to meet the branches from the opposite side ; the marginal fasciole is a narrow line, which passes above the fold of the border and entirely encircles the test, dipping into the anteal sulcus in its course, but its position in relation to the anus is not clearly shown in either of our specimens. Agassiz figures it as passing under the anus; in his figure the remark- able arches on the anterior part are not drawn: the apical disc is small, and occupies the centre of the test; it has only two genital holes like a Hemiaster, and five small ocular holes; the upper surface of the test is covered with small, nearly equal- sized tubercles, those on the anterior side are a little larger; the base is slightly convex, the lateral interambulacra carry large tubercles on their basal plates, and the sternal portion of the interambulacrum is likewise covered with a regular tubercu- lation; the basal tracks of the posterior ambulacra are smooth between the border and the mouth; the anus is situated high up on the posterior border, and the mouth lies very close to the anteal sulcus. Affinities and differences.—The central position of the apical disc and the depth and straightness of the ambulacra distin- guish this form from P. excentricus; the generic affinities of this small genus have been already pointed out. The rarity of Pericosmus, and the small number of species and individuals at present known, limit our comparisons to the forms we have cited. Locality and stratigraphical range.-—This is one of the few Urchins found in the clay bed No. 2 at. Malta: we have before us a specimen from Balistro, Corsica, from the miocene beds of ee from the Island of Malta. 101 that island, sent us by M. Michelin of Paris; we consider the peculiar arch-like arrangement of the peripetal fasciole, with the marginal, as good generic characters whereby to form a distinct genus. Pericosmus excentricus, Wright, nu. sp. Test oblong, highly convex above, slightly so below; apical disc very excentral, near the anterior border ; ambulacra in shallow depressions ; single ambulacrum slightly grooves the anterior border ; antero-laterals nearly transverse; postero-laterals in- cline at 55°; peripetal fasciole narrow and undulating ; mar- ginal fasciole narrow and low on the border ; tubercles on the upper surface small, close-set, and nearly all of the same size ; a few larger ones on the anterior interambulacra; anus large and situated high on the border; mouth-opening wide in the anterior third, surrounded by five poriferous petaloid zones ; sternal portion of the interambulacrum convex, with close-set imbricated tuberculigerous plates ; basal portions of the inter- ambulacral pairs with larger tubercles, wider apart, and more irregular than those of the dorsum. Dimensions.—Antero-posterior diameter 2 inches, transverse diameter 1,8, inch, height 1 inch ? Description— This Urchin is so much crushed that it is im- possible to describe its outlme. The ambulacral areas form shallow depressions, and the single area slightly grooves the an- terior border: the antero-laterals are nearly transverse, their in- clination being forwards ; they are ;8,ths of an inch in length : the postero-laterals form an angle of 55°; they are ;°,ths of an inch long. The crushed state of the test makes it impossible to count accurately the pores, or give the breadth of the areas ; the apical disc, with four genital pores, is very small and remarkably excentrical, being very near the anterior border ; the peripetal fasciole is narrow, angular and undulating, and instead of sur- rounding the anterior part of the antero-lateral ambulacra, as in P. latus, it descends from them and joins the marginal fasciole below their base, so that the anterior sides of the antero-laterals, and the single ambulacrum, want the peripetal fasciole. The specimen before us is so much crushed, that we cannot trace the band continuously all round the test, so as to describe its course with accuracy ; it is possible that this species may form the type of a distribution of the fascioles distinct from any that is yet known. We have stated enough to show, that at least in this form there is a considerable deviation from the normal arrangement. The anus is large and oval, and near the dorsum; the mouth is wide and bilabiate, and situated near the border; the sternal portion of the interambulacrum is slightly convex, and thickly covered 102 Dr. T. Wright on Fossil Echinoderms with an imbricated arrangement on the plates, on each of which a perforated tubercle is raised. The basal portions of the inter- ambulacral pairs are covered with wider-set tubercles of the same size, and the entire upper surface of the test is crowded with small tubercles closely set together, and very uniform in size and arrangement. The mouth is surrounded by five petaloid pori- ferous ambulacra. Affinities and differences.—The excentrical position of the dise, with its four genital holes, and the petaloid poriferous ambulacra around the mouth, establish an affinity between this form and Brissus. The way in which the peripetal joins the marginal fasciole is similar to what exists in Schizaster, whilst the mar- ginal fasciole, entirely encircling the test and passing round beneath the anus, is found only in Pericosmus. The excentral position of the apical disc and the shallowness of the am- bulacral star form a sufficient diagnosis between this species and P. latus. Locality and stratigraphical position.— Collected from bed No. 1, the Gozo marble at Malta, where it is rare. Genus Scuizaster (Agassiz, 1834). Urchins with a cordiform test, broad and depressed before, narrow and elevated behind ; the ambulacral summit excentral and nearer the posterior border ; the petaloid ambulacra lodged in very deep depressions, the antero-lateral much longer than the postero-lateral pair; the single ambulacrum long and deeply sunken in the anteal sulcus; the peripetal fasciole surrounds the ambulacral star, and from one of the antero-lateral angles thereof, a second postero-lateral fasciole arises, which passes downwards and backwards along the sides and under the anus, where it joins its fellow of the opposite side; the genital pores are two in number from the fusion of the anterior and posterior pairs ; the five ocular plates are small and lodged in depressions ; the eye-holes are microscopic. Schizaster differs from Hemiaster in possessing a postero-lateral fasciole, and in having the antero- lateral ambulacra less divergent and lodged in deeper depressions ; the anteal sulcus is also much deeper. Schizaster eurynotus, Agassiz. Syn. Echinus Spatangus compressus et lapidescens in Melitensi topho, Scilla, Corp. Mar. tab. 7. fig. 1. Echinus gladiatus vestitus et nudus Imperati, Klein, Echinod. p. 35. tab. 27 A. Spatangus lacunosus, Leske, no. 77. p. 227. Spatangus canaliferus, Lamarck, Anim. sans Vert. 2nd ed. tom. iil. p- 327; Grateloup, Foss. Ours. Dax, p. 67. from the Island of Malta. 103 Schizaster eurynotus, Sismonda, Mem. Echin. Foss. Nizza, tab. 2. fig. 3. p. 31; Agassiz and Desor, Ann. Sc. Nat. tom. viii. p. 21. série 3. Spatangus Scilla, Desmoulins, Etudes sur les Echin. no. 24. p. 392. Test heart-shaped, depressed and rounded anteriorly, elevated and pointed posteriorly ; ambulacral areas deeply excavated ; the single ambulacrum long, deep, wider in the middle and narrower at the anterior border, which is deeply grooved by it: antero-laterals slightly f-shaped ; angle 52°; length 1,5, inch: postero-laterals, angle 72°, short, ths of an inch ; apical dise with two genital holes near the posterior third ; single interambulacrum elevated into a prominent carina ter- _ Ininating in a caudal hooked process. Description.—This Urchin resembles Schizaster canaliferus now living on the shores of the Mediterranean, and for which it has been mistaken by some naturalists, but an attentive study of the living and fossil species discloses characters by which they may be distinguished from each other. The test in S. eurynotus” is cordate, depressed before and elevated behind. The ambu- lacral areas are deeply depressed; the odd or anterior ambu- lacrum is nearly twice the width of the pairs, it swells out in the middle, is blunted at the apex, and most contracted at the anteal suleus, which is deep and narrow when contrasted with the width it attains above. The poriferous zones lie at the base of the walls of the sulcus; the very narrow plates that compose the floor of this area are each studded with a row of small gra- nules. The antero-lateral ambulacra diverge at an angle of 52°; they are slightly f-shaped, and are 1,5, inch in length: the numbers of holes in the zones are thirty-six and thirty-four. The postero-lateral pair are short, and make an angle of 72°; they are ;%,ths of an inch in length, and have respectively twenty-six and twenty-four holes in their zones. The peripetal fasciole passes close to the base of the posterior pair, dips slightly into the space which separates the anterior from the posterior pair, runs at some distance from the anterior pair, passes close by the base thereof obliquely towards the anteal sulcus, into which it dips, and meets its fellow from the opposite side: the very narrow postero-lateral fasciole is directed obliquely down- wards and backwards, and unites with its fellow at some distance below the anus. The test is depressed anteriorly and sloped away at the checks, whilst behind it is much elevated. The interambulacrum forms an elevated ridge between the posterior ambulacral pair, and is produced into a caudal-like process behind, beneath which the circular anus is pierced ; the sternal portion of the odd interambulacrum is tumid and convex ; the VOL. 1. I 104 Dr. T. Wright on Fossil Echinoderms basal portions of the lateral and anterior pairs slope gently towards it; the tracks of the ambulacra are nearly naked as they approach the mouth, and are here perforated with buccal pores. The mouth is at the anterior third, and has a projecting under- lip; the tubercles on the upper surface are small and of a uniform size; those on the sternum are larger, and are per- forated and set on crenulated summits; they are arranged in lines radiating from a posteal point ; the tubercles of the inter- ambulacral pairs are the largest. Affinities and differences.—This species very much resembles the living S. canaliferus, but it may be distinguished from it by the following characters :—S. eurynotus is broader and more depressed before, and is not proportionally so high behind as S. canaliferus ; the antero-lateral ambulacra are more divergent, and the postero-lateral pair are proportionally longer in S. eury- notus than in S. canaliferus. The single ambulacrum is about the same depth as the pairs, and has the pores in a single file in S. eurynotus, whereas in S. canaliferus this area is much deeper, and the pores are not in single file, but are crowded together, so that they form three rows in a part of the zone; the tubercles of the base are much larger in the living than in the fossil species. S. ewrynotus is distinguished from S. Parkinson by its f-shaped ambulacra being less divergent, and the position of the apical disc, which is much nearer the posterior border in S. eurynotus ; the anterior ambulacrum is likewise much wider and deeper in that Urchin than in S. Parkinsoni: the great develop- ment of the single interambulacrum, and breadth of the pos- terior border in S. Desori sufficiently mark that species as widely distinct from S. eurynotus. Locality and position.—Collected in bed No. 4, the calcareous sandstone at Malta ; we have it also from Santa Manza, Corsica, sent us by M. Michelin; it has likewise been found in the Ter. moyen de Perpignan, Cagliari. Schizaster Desori, Wright, n.sp. Pl. VI. fig. 3 a—c. | Test cordate, broad and much depressed before, narrow and much elevated behind ; ambulacral areas long, straight, and very divergent ; peripetal fasciole forms an acute angle on the anterior interambulacra; apical disc situated at the posterior third of the dorsum; angle of the antero-lateral ambulacra 44°; angle of the postero-lateral pair 60° ; posterior border truncated obliquely downwards and inwards; sternal portion of the interambulacrum tumid and prominent at the base, amounting almost to a deformity. Dimensions.—Antero-posterior diameter 2 8, inches, transverse diameter 247, inches, height at the deepest part 14%, inch. from the Island of Malta. 105 Description.—This remarkable Urchin wants the symmetrical proportions of the other Schizasters met with in the same rocks ; it is rounded and broad before, and tapers into a narrow wedge- shape process behind ; the dorsal surface inclines forwards at an angle of 17°; the ambulacral areas are long. The single anterior area compared with S. ewrynotus is narrow, and of a uniform width ; it is 1,5, inch in length from the apical disc to the fasciole ; there are twenty-four pairs of pores in the avenues, the external being much larger than the internal row, although this is properly speaking a generic character. The antero-lateral ambulacra diverge nearly straight outwards at an angle of 44°; they form deep depressions in the test 1,5, inch in length, and the zones contain thirty pairs of holes in each: the postero- laterals are slightly petaloid, and gently flexed outwards; they are 33ths of an inch in length, and diverge at an angle of 60°. The zones contain about twenty pairs of holes; the test being nearly as broad as it is long across the termination of the an- tero-lateral ambulacra; the anterior border is gently rounded, and has a rather deep anteal suleus for the ambulacrum ; from the same point to the posterior extremity it tapers suddenly, which gives a wedge-shaped appearance to the test when viewed from above. The most remarkable feature in this Urchin is the curious form which the single interambulacrum assumes, owing to the great development of this area ; the dorsal surface forms an inclined plane having an inclination of 17°; the anterior part is therefore very much depressed, and the posterior part much ele- vated. The single interambulacrum forms a prominent beak- like process, beneath which the posterior border is broad, and inclined downwards and forwards; the sternal portion of this area 1s prominent and convex, towards which the basal parts of the lateral interambulacra slope suddenly forwards and inwards. The anus is pyriform, and placed high up underneath the beak- like process. The mouth is situated near the anterior border ; it has a large under-lip, but is crushed in the small specimen, and covered up in all the others before us. The small apical disc lies concealed at the posterior third of the dorsum by the prominent apices of the lateral interambulacra. The peripetal fasciole takes a zigzag course along the outer borders of the ambulacra, and from the base of the antero-laterals it passes nearly at right angles across the anterior interambulacra to the external side of the single ambulacrum, where it makes another angle, then passes down the side thereof ;3,ths of an inch, dips into the sul- eus and unites with the opposite fasciole. The lateral fasciole commences at the angle near the base of the antero-lateral am- bulacra, and passes downwards and backwards nearly in a straight line over the angle of the posterior border at some distance from 12 106 Dr. T. Wright on Fossil Echinoderms the anus, and meets the one from the opposite side, at the middle line near the base ; in the triangle thus formed, the caudal process and anus occupy the base, and a depression lies beneath which is filled with tubercles somewhat larger than those on the dorsum, but smaller than those on the base; the tubercles are perforated and raised on prominent crenulated bosses (fig. 3 ¢) ; the sternal and basal portions of the test, as well as the anterior border, being furnished with much larger tubercles. Affinities and differences.—The straightness of the pairs of ambulacra, and the narrowness of the single anterior ambulacrum, are alone sufficient to distinguish S. Desori from S. eurynotus when viewed only from above, but when we add to these the remarkable oblique truncation of the posterior border (fig. 3 5), the great tumidity of the sternum, and the sloping character of the sides of the base, we discover how widely different these two forms are from each other. The same group of characters serves to distinguish it from S. Parkinsoni, but in this species the apical disc is much nearer the centre of the test; the antero-lateral ambulacra are arched outwards, and the postero-laterals are pro- portionately longer. Locality and stratigraphical position.—Collected from the cal- careous sandstone bed No. 4, at Malta; the large specimen be- longs to the Bristol Institution, the others form part of Earl Ducie’s collection. We dedicate this species to M. Desor of Neufchatel, one of the learned authors of the ‘Catalogue raisonné des Echinides.’ . Schizaster Parkinsoni, Defrance sp. PI. V. fig. 3 a-c. Syn. Spatangus Parkinsoni, Defrance, Dict. Sc. Nat. tom. 50. p. 96 ; Desmoulins, Etudes sur les Echinides, p. 394. no. 29. Spatangus lacunosus, Parkinson, Organic Remains, vol. ii. tab. 3. fig. 12. ee Parkinsoni, Agassiz and Desor, Cat. raisonné, Ann, Se. Nat. tom. vill. p. 22. Test cordate, depressed anteriorly, elevated posteriorly ; apical dise nearly central ; sides expanded and tumid ; cheeks sloping and contracted ; single ambulacrum rather wider than the anterior pair, of the same diameter throughout, except near the apex; antero-lateral ambulacra diverge at an angle of 35° ; length 1 inch ; postero-lateral make an angle of 65°; length ;6;ths of an inch ; posterior part of the back raised into a long prominent carina; posterior border obliquely truncated ; base convex ; mouth near the anterior border ; anteal sulcus nar- row and of moderate depth. Dimensions. — Adult. Antero-posterior diameter 233 inches, transverse diameter 234 inches, height 143 inch, from the Island of Malta.. 107 Junior. Antero-posterior diameter 2 inches, transverse dia- meter 1,9, inch, height 1,3 inch. Description.—We have identified this Urchin with that figured by Parkinson in his ‘ Organic Remains,’ not however without ~ much hesitation, inasmuch as that figure is without details, and is moreover drawn from a distorted specimen. We have in vain endeavoured to find out the original, and have therefore, from the central position of the apical disc and the great divergence of the ambulacra, and from its being at the same time the most common of all the Maltese Schizasters, and the one most likely to have been sent to Parkinson, adopted Defrance’s identifi- cation. The test is heart-shaped, its widest part bemg at a line drawn across the disc; from this imaginary line the back slopes obliquely forwards, and the border is rather bevelled away at the cheeks ; from the same line backwards there rises a pro- minent ridge which bends over into a short tail-like process. The ambulacral areas (3 a) are deeply sunken, the single ambulacrum - . has a tapering lanceolate form, and the anteal sulcus is deep and narrow ; the poriferous zones lie in the angle of the depression ; they consist of twenty-five pairs of holes, of which the outer series is the largest ; the length of the petaloidal portion of this area from the apex to the fasciole is 1,4, inch. The antero- lateral ambulacra (3 a) are more divergent in this species than in the other Schizasters met with in the same rocks; they are 1, inch in length and are slightly curved outwards and back- wards ; they make an angle of 35°; the number of pores (3 c) © in the zones is respectively thirty-six and thirty-four, the apical eight pairs being almost microscopic: the postero-lateral pair are ;°;ths of an inch in length and slightly f-shaped; they are directed backwards at an angle of 65°, and are proportionately narrower than the anterior pair; there are twenty-two pairs of holes in each of the zones, the upper six pairs of which are microscopic. The peripeta] fasciole (3 4) is distinctly defined and passes close to the bases of the petaloid portions of the ambu- lacra, but at a short distance from the sides thereof it describes a curve inwards in passing over the anterior interambulacra, and dips obliquely into the anteal sulcus where it unites with that of the-opposite side. The lateral fasciole is large and very distinct ; _ it takes a backward and downward course towards the base of the posterior border, and joins its fellow at some distance be- low the anus; the two fascioles form the letter V in their trajet _ on the test. The apical dise is situated very near the centre of the back, removed a little nearer to the posterior than the ante- rior border ; it is perforated with four equal-sized genital holes. The anus is oblong, situated high up in the obliquely truncated posterior border, in which is a triangular depression limited on 108 Dr. T. Wright on Fossil Echinoderms the sides by the fasciole, and above by the anal opening and caudal process ; the base is convex ; the sternum is not very pro- minent, and has lines of tubercles proceeding in radii from a point near the border ; the basal portions of the posterior ambu- lacra are naked, and around the mouth buccal pores are seen, which extend at considerable intervals along the trajet of the posterior pair. The mouth is situated in the anterior fourth of the base and has a projecting under-lip; the basal parts of the interambulacra glide mto the general convexity of the floor of the test; the lateral pair have a regular tuberculation, but on the anterior pair the tubercles are larger and more irregular. Affinities and differences.—The nearly central position of the apical disc and the greater divergence of the antero-lateral am- bulacra distinguish this Urchin from its congeners ; the narrow- ness of the odd ambulacrum and the absence of the swelling-out im the centre of the same, serve to separate it from S. eurynotus ; the blunt caudal process, the small posterior border, and the general tumidity of the sides distinguish it from S. Desori. Locality and stratigraphical position.—Collected from bed No. 4, the calcareous sandstone at Malta, where it is common ; it is found likewise in the Molasse, middle tertiaries, of Mar- tigues, Bouches-du-Rhone. Fine specimens are contained in the British Museum, Jermyn Street Muscum, and that of the Bristol Institution. Since the preceding sheets of this memoir have been passing through the press, we have had the opportunity of examining the Maltese fossils belonging to the Geological Society, and some that had escaped our notice in the British Museum collection ; from these new materials the followmg notes are now added :— Clypeaster Reidiz, Wright, n. sp. Test large, broadly pentagonal, and much elevated; border - abrupt, margin thin and undulated, rising with steep sides at angles of 60°, and with a very little curve towards the vertex, which is nearly central; petaloidal portions of the ambulacral areas large, nearly equal in width, and extending over nearly three-fourths of the sides ; base quite flat; mouth small, pen- tagonal, nearly central; basal ambulacral sulci proceeding from the angles of the mouth, narrow, and sharply defined ; anus round, near the posterior margin ; tubercles on the upper surface small and closely set together, those on the base a little larger; apical dise nearly central and prominent, with an outer circle of genital holes, and an inner circle of eye- holes having the madreporiform tubercle in the centre. from the Island of Malta. 109 Dimensions. — Antero-posterior diameter 5,5, inches, trans- verse diameter 5,%, inches, height 2,8, inches. Description.—This large Clypeaster has been mistaken for one of the varieties of C. altus, but a careful study of its test dis- closes characters by which it is readily distinguished from that common form. The circumference is nearly pentagonal; it is rounded before, undulated on the sides, and nearly straight behind ; the sides of the pentagon are of unequal length, those forming the front of the test are the shortest, those of the middle are somewhat longer, and the posterior single side is the longest. There is scarcely any margin to the test in this species, as the sides rise abruptly from the border to the apex, making angles of 60° with the base, and being only slightly curved in- wards; the dorsum is therefore very small in proportion to the diameter of the base. The petaloidal portions of the ambulacral areas extend over nearly three-fourths of the sides; they form long elegantly-shaped petals, narrower in proportion to their length than those of C. altus, and consequently allowing of a greater development of the interambulacral areas than in that species; the petaloidal ambulacral areas are nearly all of the same length, width and structure ; the centre of each petal is arched and costated, and forms a considerable relief on the sur- face of the test. The poriferous zones lie in slight depressions on their sides ; each zone contains sixty-two pairs of pores set widely apart ; in the inner row the holes are round, in the outer row they are oblong, and both are united by straight oblique sulci; the external surface of the partition-wall between each pair is covered with a row of small tubercles. The bases of the ambulacra are open, but not so widely as in some other con- generic forms. The interambulacral areas are nearly flat, of moderate width, and very uniform in their structure. The apical disc occupies the centre of the dorsal surface; it consists of two circles of holes ; the outer is formed of five small genital holes, the plates of which are not distinguishable, and the inner of five small perforated ocular plates, which are distinctly visible at the apieés of the ambulacra. The madreporiform tubercle occupies the centre, and forms a button-like prominence there ; the border is thin and undulated, and this portion of the test presents a striking difference to the obtuse marginal fold seen in C. altus. The base is quite flat ; the pentagonal mouth is small and nearly central ; the oral lobes are curved inwards at an acute angle, and the five ambulacral sulci are sharply defined as they radiate from the sides of the pentagon to the border. The anus is round, and is situated near the posterior border: the tubercles on the upper surface are small and closely set together ; those: on the base are a little larger. 110 Dr. T. Wright on Fossil Echinoderms Affinities and differences.—Clypeaster Reidii very much resem- bles C. umbrella both as to height, width, and the smallness of its tubercles ; it is distinguished from that species by the follow- ing characters: C. Reidii is more elongated ; the petaloidal am- bulacra are longer and narrower; the mterambulacra are flat- tened and slightly curved; the base is quite flat, and the oral lobes are curved acutely inwards. In C. umbrella the interam- bulacra are arched and costated, the base is concave, and the oral lobes slope obliquely inwards. Compared with C. altus, the differences are found to be still greater: in C. Rezdit the test is broader in proportion to its length ; the petaloid ambulacra are narrower ; the poriferous zones are not so open at the base. The apical disc is convex and prominent in C. Reidii, and depressed in C. altus. In C. Rezdii the border is thin and sharp, and the base is flat. In C. altus the border is thick and rounded, and the base is concave. In C. Reidii the mouth is small, and the oral lobes curve acutely inwards; whilst in C. altus the large mouth lies at the bottom of a concave depression formed by the gradual inward sloping of the mterambulacra. The distinctions between our species and that of C. seutellatus and C. marginatus are so well defined, that it is unnecessary to make a comparison with them. Locality and stratigraphical position.-—This species is appa- rently from bed No. 1, the Gozo marble, but this we cannot with certainty state. Fine specimens are in the Jermyn Street Mu- seum, and in the collection of the Geological Society of London. We dedicate this species to his Excellency Sir William Reid, Governor of Malta, whose laudable efforts to form a public col- lection of Maltese fossils have greatly contributed to our know- ledge of the paleontology of the island. Genus Pycornyncuus, Agassiz, 1839. In the dismemberment of the genus Nucleolites of Lamarck, M. Agassiz has not been so fortunate as in other groups of Echinida: the characters on which, for example, Catopygus*nd Pygorhynchus are distinguished from Nucleolites are not satis- factory, as they undergo important modifications in the different species grouped together in each of these new genera. If we take a type specimen of each genus only and compare them together, we admit the distinctions pointed out; but when we examine several species of each of these genera, we observe the characters gradually blending into the primary type form: as representatives in tame, the grouping is valuable, but the zoolo- gical characters in our judgment are too indefinite to found genera thereon. With these remarks we refer provisionally the —————— ——— en — ee from the Island of Malta. 111 small Nucleolite before us to the section Pygorhynchus, which is thus characterized by Agassiz :—“ Form elongated ; ambu- lacra distinctly petaloid, often costated as in Echinolampas. Mouth central or subcentral, pentagonal, surrounded with five large lobes, and a distinct resette of buccal pores. Anus pos- terior, nearer the superior than the inferior border.” All the species of the genus Pygorhynchus belong to the nummulitic and tertiary rocks ; those of the genus Catopygus, with one ex- ception, are cretaceous forms. Pygorhynchus Vassalli, Wright, n. sp. Test oblong, wider behind than before ; interambulacrum pro- duced into a caudal elongation ; petaloid portions of the am- bulacral areas narrow and short; sides tumid; anus small, round, nearer the inferior border than the dorsum, with a projecting beak-like process arching over its upper border, and an oblique truncature of the lower part of the border below ; base slightly concave ; mouth pentagonal, nearly cen- tral; oral lobes small; rays of the poriferous star around the margin short. Dimensions.—Antero-posterior diameter 1,4, inch, transverse diameter ;/,ths of an inch, height nearly {ths of an inch. Most of the specimens average only from one-half to two-thirds of these dimensions. The large specimen before us is the most _perfect we have examined. Description.—This small Urchin has an oblong form; it is rounded before, a little enlarged towards the junction of the middle with the posterior third, which is produced into a caudal process. The sides are tumid, and the upper surface is flat- tened; the petaloid portions of the ambulacral areas are narrow and short, and form only a star on the dorsum ; the single and postero-lateral areas are nearly alike in width and length ; the antero-lateral pair are rather wider and shorter, they are ths of an inch in length, and are slightly curved forwards and outwards; their poriferous zones contain eighteen pairs of pores, arranged in narrow rows, and not united by any apparent slit. The postero-lateral areas are z4,ths of an inch in length, and their zones contain twenty pairs of pores ; these areas are directed much backwards, which makes the width of the lateral interam- bulacra proportionally greater. The apical disc is nearly central, but nearer the anterior border; it has four large genital pores, and five well-marked eye-holes. The single ambulacrum is almost identical in length and width with the posterior pair ; the apices of all the ambulacra are rather rounded than lanceolate. The lateral interambulacra we have said are very wide, but the single 112 Dr. T. Wright on Fossil Echinoderms interambulacrum is narrow, and forms a conspicuous prolon- gation or beak-like process, which arches over the upper border of the round anal opening, situated rather below the middle of the posterior border, in an oblique truncature of the test: this beak-like process is not seen in the small specimens before us ; it would therefore appear to be a character of the adult con- dition only. The base is slightly concave towards the mouth, which is situated nearer the anterior border ; it has a pentagonal form, with five small oral lobes covered with tubercles ; between them, the terminations of the ambulacra form five short pori- ferous petals. The tubercles on the upper surface are small and irregularly disposed on the plates; those on the base are a little larger, especially in the vicinity of the mouth. Affinities and differences.—This species resembles Catopygus fenestratus from the upper chalk of Ciply, Belgium, but is di- stinguished from it by having the sides more tumid and the upper surface flatter ; the posterior border is likewise more pro- duced ; it distinctly differs from it however in having the base slightly concave, and the oral lobes less developed. It differs from Nucleolites (Pygorhynchus) subcarinatus, Goldf., from the middle tertiaries of Biinde, in having more tumid sides, a less concave base, and a different form of the anal opening. From the very brief notice of Catopygus conformis, Desor, from the tertiaries of Orglande, it is impossible to form any idea how far it may resemble that form, as it is neither figured nor described, but merely entered in the ‘Catalogue raisonné’ with this re-- mark: “ Mais l’anus est un peu plus bas, et la face supérieure plus surbaissée.” Locality and stratigraphical position Collected from bed No. 1, Malta, where it is extremely rare. Specimens are in the collection of the Geological Society, the Jermyn Street Museum, and the cabinet of Earl Ducie. We dedicate this species to Dr. Vassallo of Malta, under whose judicious care and continued research the public collection of Maltese fossils has been greatly enriched. Spatangus Desmaresti, Goldf. Syn. Spatangus Desmarestii, Goldf. Petref. p. 153. tab. 47. fig. 4 a—e ; Agassiz and Desor, Cat. raisonné, Ann. Sc. Nat. tom. vill. p. 7. Test cordate, arched and carinated ; anteal sulcus broad ; peta- loid portion of the antero-lateral ambulacra long, narrow, and curved outwards and a little backwards, angle of inclination 18° ; postero-laterals long and narrow, angle 60° ; only a few moderate-sized tubercles on the interambulacral plates between all the ambulacral areas; border slightly obtuse ; posterior part truncated ; anal opening transversely oblong ; base plano- a a i i te from the Island of Malta. 113 convex ; tubercles moderate in size ; mouth transversely ob- long, situated at the junction of the anterior with the middle third ; tubercles on the upper surface very small. Dimensions.——A German type specimen. Antero-posterior dia- nig 2445 inches, transverse diameter 2,5, inches, height 1,5 inch. A Maltese specimen. Antero-posterior diameter 1,8, inch, transverse diameter 1-/, inch, height }Zths of an inch. Description.—This Urchin is well known from the admirable figure in Goldfuss. Its upper surface is more convex and in- flated than in the other congeneric species; it is higher behind than before, and has a blunt ridge which passes backwards from the disc to the border. The antero-lateral petaloidal ambulacra, 28ths of an inch in length, curve a little outwards, forming an angle of 18°; their zones contain from twenty-two to twenty- four pairs of pores, separated by rather thick partitions of the test. The postero-latera]l areas are narrower than the anterior pair, and rather more than an inch in length; their zones con- tain from twenty-eight to thirty pairs of holes, and they form angles of 60°. The interambulacral areas are wide and largely developed in this species ; the upper plates in these areas, lying between the ambulacra, support only very small perforated tubercles, arranged in groups of threes and fours, and disposed on all the areas; this character serves to distinguish S. Des- marestii from all its congeners at present known: the small tubercles on the dorsal surface are very small, and closely set together. The single ambulacrum is lodged in a broad shallow valley, which forms however a considerable anteal sulcus; the pores in this area are so much covered up with matrix in our specimen, that we are unable to count their number. The pos- terior border is truncated, and the large transversely oval anal opening occupies the upper part of this region. The shelly matrix entirely conceals the course of the subanal fasciole. The sternal portion of the interambulacrum is slightly convex, and covered with small tubercles that radiate in lines in all direc- tions from a central point ; the basal portions of the anterior and lateral interambulacra are covered with larger tubercles, and the naked intermediate spaces indicate the ¢rajet of the basal por- tions of the postero-lateral ambulacra from the border to the mouth, The mouth is situated at the junction of the anterior with the middle third; it is much elongated transversely, and has five poriferous petals surrounding it. The apical dise is small and nearly central ; it has four genital holes and five small eye-holes. Affinities and differences.—The inflation of the test, the small- * \ 114 Dr. T. Wright on Fossil Echinoderms ness of the large tubercles on the upper surface, and their pre- sence on the interambulacrum, serve to distinguish this species from its congeners. Locality and stratigraphical position Found with S. Hof- manni in bed No. 4, the calcareous sandstone at Malta, where it is rare. The Maltese specimens we have seen are small, and do not exceed the dimensions given ; they are contained in the col- lections of the British Museum and the Geological Society. In Germany it is found in the middle tertiaries at ‘ Duberge bei Biinde, and at Astrupp bei Osnabriick.”” The admirable figure given by Goldfuss of this species is all that can be desired. Genus Eupatacus, Agassiz, 1847. Spatangoid Urchins, with a cordate or elliptical form, more or less depressed ; the petaloid portions of the antero- and postero- lateral ambulacral areas are wide; the single area is lodged in a shallow anteal sulcus, and the entire ambulacral star is closely surrounded by a broad well-defined peripetal fasciole, which undulates round its margin ; within this fasciolar space, the im- terambulacral plates carry very large perforated tubercles raised on crenulated bosses, and surrounded by wide smooth areolas, like those in the genus Spatangus. The heart-shaped shield, beneath the anal opening, is lkewise surrounded by a well- defined subanal fasciole. The basal portions of the postero- lateral ambulacra form broad, naked bands, between the poste- rior border and the mouth. The other characters resemble those of Spatangus, from which it differs however in possessing a pert- petal fasciole. Eupatagus De Koninckti, Wright, n. sp. Syn. Spatangus De Koninekii, Wright, Ann. of Nat. Hist. vol. xv. p- 178. 2 The test of the original specimen of Eupatagus De Koninckit having had the external layer of its shell and consequently its -_fascioles denuded, we are now enabled to correct our determi- nation of this species from a specimen in the collection of the British Museum, in which these important parts of the anatomy of the skeleton are well preserved. For the description of this Urchin see our article Spatangus De Koninckii, to which we subjoin the following note :—The peripetal fasciole is rather broad, surrounding with little undulation the ambulacral star, and forming a well-defined boundary between that portion of the upper surface with large perforated tubercles, and that part with very small tubercles; the subanal fasciole heart-shaped, rather broad, and enclosing a shield-like space filled with larger * a i 28 ed ~s. from the Island of Malta. 115 tubercles ; it extends from the prominent point of the base to near the lower part of the anal opening. Scalaria Duciei, Wright, n. sp. Pl. VII. fig. 4a, b. Diagnosis.—Shell turriculated, imperforate ; spire gently taper- ing; whorls ten, with transverse prominent plates and longi- tudinal elevations. ‘The transverse plates, nmeteen in number on the body-whorl, are formed of numerous thin shelly lamine, closely united where they proceed from the whorl, but out- wardly they expand and form a rather irregular undulated sur- face ; each plate describes three curves; two of these, the anterior and posterior, are short, and the central one is long, forming an arch over the whorl; the posterior, at their junc- tion with the central curve, form angles, from whence blunt spiny processes proceed; these form a conspicuous ridge on the posterior upper part of the whorls; the junction of the anterior with the central curves forms a carina on the body- whorl, which commences at the posterior border of the aper- ture, and terminates at the anterior part thereof, at a di- stance from the umbilical ridge. The longitudinal elevations form a kind of cellular structure ; between the plates they are seven or eight in number, and on them and the intervening surface of the shell, delicate longitudinal lines are sculptured. The aperture is entire, and is round or inclining to an oblong. Dimensions.—Length 2,%, inches, diameter of the body-whorl 3ths of an inch. Collected from the calcareous sandstone No. 4, at Malta. Lenticulites complanatus, Defrance. PI. VII. fig. 4a, 6. Genus Lenticuutites, Lamarck. (Subkingdom Radiata. Class Foraminifera. Order Hélicostégues,D’Orb. Family Nau- tiloide.)—Shell nautiloid, equilateral, spire rolled on the same plane, compressed, sublenticular, multilocular ; whorls apparent, opening narrow, triangular, prominent, against the penultimate turn of the spire. Diagnosis.—Shell oblong, lenticular, much compressed; septa convex, with longitudinal partitions, growth lines very appa- rent. Long diameter ;4ths of an inch. This beautiful Foraminiferous shell occurs in great abundance in No. 2, the yellow sand with blackish grains; in fact it forms large masses of rock in this bed. As it 1s constantly associated with the Echinoderms, we have added a drawing thereof. De- france noticed, but did not figure this fossil; he collected it at “ Anvers prés de Pontoise, 4 Dax, & Loignan prés de Bordeaux, 5 116 Dr. T. Wright on Fossil Echinoderms & Boutonnet prés de Montpellier, et en Italie dans les couches, qui paroissent appartenir au calcaire coquillier grossier*.” EXPLANATION OF PLATES IV. V. VI. ann VII. Puate IV. Fig. 1. Cidaris Melitensis: a, the upper surface; 6, side view of the am- bulacral and interambulacral areas, natural size; c, an interam- bulacral plate, and a portion of an ambulacral area with the poriferous zones, magnified. Fig. 2. Echinus Duciei: a, upper surface ; b, side view, natural size ; c, the form of the mouth-opening, showing the disposition of the mar- ginal notches ; d, the five jaws and teeth “in situ,” imbedded in a mass of rock; e, the apical disc, showing the arrangement of the genital and ocular plates; jf, two interambulacral-plates, and a portion of a poriferous zone, magnified. Fig. 3. Echinolampas Deshayesti: a, the upper surface; 6, the under sur- face, natural size; c, a portion of the test, showing the tubercles, magnified ; d,a portion of an ambulacral area, and poriferous zones, magnified. PLATE V. Fig. 1. Brissus latus: a, the dorsal surface, reduced one-third in size ; b, the apical disc, magnified; c, the perforated tubercles, with their crenulated bosses and encircling granules, magnified. Fig. 2. Brissus oblongus: a, the upper surface, showing the petaloid am- bulacral star and peripetal fasciole ; 6, the under surface, showing the subanal fasciole, natural size ; mouth, and the ¢rajet of the naked basal portions of the ambulacra; c, the tubercles, and their circles of granules, magnified. Fig. 3. Schizaster Parkinsoni: a, the upper surface, showing the petaloid ambulacral star, the peripetal and lateral fascioles, the natural size; 6, a portion of the peripetal fasciole, with the boundary granules, magnified; c¢, a portion of the poriferous zones, mag- ified. Puate VI. Fig. 1. Brissopsis Duciei : a, the upper surface, showing the petaloidal ambulacral star, surrounded by the peripetal fasciole, reduced one-third; 6, six plates with small poriferous tubercles from the anteal sulcus ; c, form of the pores, and arrangement of the tuber- cles in the poriferous zones; d, the larger perforated tubercles, and their crenulated bosses with their circlets of granules ; e, a portion of the peripetal fasciole, showing how distinctly it is defined from the rest of the surface by rows of granules. Fig. 2. Brissopsis crescenticus : a, the upper surface ; 6, the under surface, natural size; c, the arrangement of the pores, near the apical portion of one of the zones. Fig. 3. Schizaster Desori: a, the upper surface; b, the under surface, natural size; c, the perforated tubercles, with their circlets of granules and crenulated bosses, magnified. * Dict. Sc. Nat. tome xxv. p. 453, + Ske Tt Me from the Island of Malta. 117 Puate VII. Fig. 1. Hemiaster Scille: a, the upper surface, showing the ambulacral star and peripetal fasciole, natural size; b, the under surface of the same test; ¢, a lateral view, to show the great height of this species ; d, the perforated tubercles and encircling granules, mag- nified; e, a portion of the single ambulacrum, showing the arrangement of the pores; f; a portion of a poriferous zone. Fig. 2. Hemiaster Cotteauii: a, the upper surface, natural size; 6, the perforated tubercles, with their circles of granules; c, portion of a poriferous zone ; d, portion of»the peripetal fasciole, with its boundary granules. Fig. 3. Scalaria Duciei: a, shell, the natural size ; 5, a fragment showing the mouth. Fig. 4. Lenticulites complanatus: 4, natural size of this Foraminiferous shell; 5, a section magnified, showing the cells:—large rocky masses of this fossil occur in the yellow sand associated with the Urchins of that deposit. 118 On Perna quadrata, Sow. By Joun Lycert, Esq. Reap 30TH January 1855. THE present notice of a fossil shell; which has already been figured and described, requires some explanation. The Perna quadrata of the ‘ Mineral Conchology,’ t. 490. f. 2, represents a very inequivalve Perna ; but as the specimen figured appears to have been somewhat imperfect, and as it was placed by the artist in an unfortunate position and is seen only from a single point of view, it affords a very insufficient aid to a de- scription which is substantially correct as far as it refers to the only specimen which appears to have been at the disposal of the author. With such an illustration it will not afford surprise to find that Phillips in his Geology of Yorkshire, t. 9. f. 24, repre- sented a second and very different shell under the name of Perna quadrata ; and as the latter work contains no descriptions of spe- cies, Goldfuss was in turn also misled to figure a third Perna distinct from both the others under the same name (Petrefacta, t. 108 ); upon the same plate however is Perna rugosa, which is identical with the quadrata of Phillips ; the latter is an equivalve, squamous, thick shell, well known to collectors of British Inferior Oolite fossils. There is another inducement to acquire a correct knowledge of the original Perna quadrata, inasmuch as the spe- cies is a very remarkable one, constituting a departure from the typical forms of the Perne, and approaching to others of the kindred genus Inoceramus. The diagnosis of this shell in the ‘ Mineral Conchology’ is as follows :—“ Quadrilateral, one side shorter than the other three ; valves gibbose, unequal, the shorter side very concave, bounded by two obtuse carinz.” The figure in the ‘ Mineral Conchology’ has the right or flattened valve facing the spectator ; the contour of the larger or convex valve therefore is not seen : the shell is not placed upright upon the page, the lower border forming the right-hand side of the figure: even the outline is not perfect, as there seems to be a portion of the lower border wanting, and thus forming an angle at its anterior extremity, which would be rounded were that part entire. The typical Perne are equivalve or subequivalve ; their fibrous tests are squamous externally, and acquire great thickness with Mr. J. Lycett on Perna quadrata. 119 advance of growth; the valves are so much flattened, that their attenuated apical extremities have not more thickness or con- vexity than the corresponding parts of the Pinne and Mytili ; the hinge-plate is always broad, the greater length of the valve being always perpendicular to, or in the opposite direction to the line of the hinge-plate. Perna quadrata, on the contrary, is very inequivalve, and with advance of growth it becomes almost gryphoidal ; the umbo of the larger valve is very promi- nent, straight and incurved; the anterior side of the valve is steep, with a large excavation, byssal aperture and corrugated border ; the posterior side is much compressed, and extended into a kind of imperfect wing ; the hinge-plate is narrow, its border is much lengthened, so that the greater length of the valve is in Perna quadrata, Sow. 1. Exterior of the convex valve. 2. Hinge-plate of the flattened valve. (Reduced one-fourth.) that direction, and the shell is transverse ; the narrow hinge- plate renders the ligamental grooves very short, their diameter laterally being equal to their length, as is often seen in the genus Gervillia; they diminish rapidly, so that the posterior half of the hinge-line is destitute of hinge-plate and grooves. The byssal aperture is formed by the larger valve only. In both valves the test is very thin, excepting at the prominent umbo and anterior side of the larger valve ; the surface, unlike that of the typical Perne, is smooth; the right valve has little con- vexity, and its umbo little prominence ; its anterior border is thickened as in the other valve. In the Perna, as in the Inocerami, much variability exists in VOL. 11. K 120 Mr. J. Lycett on Perna quadrata. specimens of the same species, the result not only of different stages of growth, but also of individual peculiarities. All the specimens of Perna quadrata differ more or less from each other and from the figure in the ‘ Mineral Conchology,’ so that the identity of these specimens with Sowerby’s shell has not been ascertained without the examination of a considerable number of examples. The contrast which Perna guadrata presents to the typical Perne is therefore very great; its general aspect is in fact that of an Inoceramus, more especially of the subinvolute forms of the latter genus, from which it is distinguished only by the anterior excavation and aperture; but as this feature is one only of subordinate value when viewed singly, there would seem to need the addition of some other distinctive features ere we are enabled to affirm the clear generic separation of Perna and Inoceramus. The oblong flattened figure of the smaller valve and the thinness of the test might cause it to be mistaken for a Crenatula when the hinge-plate is not exposed. Perna quadrata may therefore be regarded as the type of a group of inequivalve transverse shells, whose relation to the typical Perne may be compared with that which certain aberrant species of the kindred genera Inoceramus and Gervillia bear to their respective typical groups. Of the Jurassic forms may be instanced the large Ger- villia Hartmanni and G. tortuosa, compared with the flattened sub- equivalve species of the same genus ; in these and other instances the inequality of the valves becomes more marked with advance of growth. The very perfect preservation of the hinge-plate, together with the condition of the tests of associated bivalves, forbids the supposition that the thinness of the test has been produced by the removal of thick nacreous layers from the inner surface. Dimensions.—Length of our largest specimen in the direction of the hinge-line 5; inches, height 33 ches, convexity of the larger valve 2 inches. Geological position and localities. —The specimen figured in the ‘Mineral Conchology’ is from the Cornbrash of Bulwick ; our own specimens are from the freestone portion of the Inferior Oolite near Nailsworth, from a quarry in Woodchester Park, worked for the purposes of the Roman Catholic Monastery ; specimens have also been obtained in the freestone quarries of Scar Hill in the parish of Minchinhampton, thus affording an additional instance of that general resemblance between the Testacea of the Cornbrash and the Inferior Oolite, which has been noticed by Prof. Buck- man in a paper on the Cornbrash of Cirencester, and which forms a part of the Proceedings of the Cotteswold Naturalists’ Club. The exact position of Perna quadrata in the freestone is the two uppermost beds of that rock, immediately underlying the Oolite marl, or in its absence, the cream-coloured hard argillaceous lime- stone with Nerineas which replaces it in the valley of Nailsworth. 121 On a New Genus of Fossil Cidaride, with a Synopsis of the Species included therein. By Tuomas Waiceut, M.D., F.R.S.E. Norwitustanpine the many new generic sections introduced into the classification of Echinoderms, by MM. Agassiz and Desor, and the important light thrown by these savans on our knowledge of the numerous species of this class contained in European collections, still the progress of discovery renders it imperative on palontologists to modify from time to time many of the opinions put forward by these authors in their ‘ Catalogue raisonné.’ When the amount of real work done by them is taken into account, in a field which was then compara- tively unknown, the wonder is, not that mistakes or oversights should have been committed, but that so much good work under the circumstances should have been attained, which will bear the most severe criticism, and remain as it was left, a monu- ment of the genius and industry of the authors. In our memoirs on the Cidaride of the Oolites, we have figured and described three species, Goniopygus perforatus, Pe- dina Etheridgii and Pedina Bakeri; the true generic position of these forms seemed to us uncertain at the time our papers were passing through the press, as they exhibited characters which did not assimilate with either of the generic divisions of the ‘Catalogue raisonné.’ Our materials did not then justify us in proposing a separate genus for their reception ; the discovery, however, of an interesting series of new congeneric forms has ~ now enabled us to rectify our determination, and propose the genus Hemipedina for the group, to which we have added a synopsis of the species included therein. Hemrrepina, Wright, 1855. This new genus is composed of small, neat, and highly orna- mented Urchins, much depressed on their upper surface, and with a flat or slightly concave base. The ambulacral areas are narrow and straight ; the pores in the poriferous zones are ar- ranged in single pairs; the interambulacral areas are in general more than double the width of the ambulacral, with two, four, or six rows of tubercles in general arranged abreast on the same tubercular plate. The tubercles are perforated, and set on mam- millary eminences with smooth uncrenulated summits; one row of tubercles in general only extends from the peristome to the disc; the other rows, when there are four and six rows in the K2 122. = Dr. T. Wright on a new Genus of Fossil Cidaride, area, stop short at the equator, or between the equator and the disc ; the intertubercular space on the upper surface of the test is therefore in general wide, and covered with a small miliary gra- nulation. The apical disc is large ; the genital and ocular plates are expanded and foliated. The mouth-opening is of moderate dimensions, and the peristome is divided into ten nearly equal- sized lobes. The spines are long, slender, and needle-shaped ; - those that are known, equal at least the diameter of the test, and their surface is sculptured with delicate longitudinal lines. Hemipedina is related to Diadema in having the pores ar- ranged in the zones in single pairs and the tubercles perforated ; but it is distinguished from Diadema by the absence of crenu- lations on the summits of the mammillary eminences. It is related to Pedina in possessing perforated and uncrenulated tubercles ; but it is distinguished from that genus in having the pores in the zones in single pairs (Pedina having the pores in triple oblique pairs hke Echinus), in having the elements of the apical disc more largely developed, and in the species being nearly all small and depressed forms. Hemipedina is related to Echin- opsis in possessing uncrenulated and perforated tubercles, with the pores in pairs ; but it is distinguished from the latter by the narrowness of the ambulacral areas, the depressed form of the test (Echinopsis being high and inflated), the form of the mouth- opening, and the deep decagonal lobes of the peristome (that of Echinopsis being almost deprived of these incisions), together with the greater size and development of the elements of the apical disc. Hemipedina, as far as we at present know, is composed of Jurassic species, which commence in the lower Lias and extend into the Coral Rag, each stage possessing its own specific forms. The following synopsis of the British species now before us will be figured and described in detail in our Monograph on the British Oolitic Cidaride. A. Species from the Lias. Hemipedina Bechei, Wright. Cidaris Bechei, Broderip, Geol. Proc. ii. 202. Diadema Bechei, Agassiz, Morris’s Catalogue of British Fossils, Ist ed. p. 51. Test small, much crushed, and covered over with spines ; ambu- lacra with two rows of tubercles; interambulacra with four or six rows of tubercles ; spines long, slender and needle- shaped, 7{,ths of an inch in length, with longitudinal lines on with a Synopsis of the Species included therein. 123 the surface. This appears to be identical with the type-spe- cimen in the Museum of the Geological Society. Locality. Lower Lias, Lyme Regis. Coll. J. 8. Bowerbank, Esq. Hemipedina Bowerbankii, Wright, nov. sp. Test crushed, 1,/,th of an inch in diameter ; ambulacral areas nar- row, with two rows of marginal tubercles rather smaller than those in the interambulacra, a tubercle on every alternate plate; interambulacral areas wide, with six rows of tubercles abreast, surrounded by a delicate scrobicular circle; spines shorter and thicker (43ths of an inch in length) than those of H. Bechei, although the test is much larger, deeply sculptured with longitudinal lines. Locality.—Lower Lias, Lyme Regis. Coll. J. S. Bowerbank, Esq. Hemipedina Jardinii, Wright, nov. sp. Test small, much depressed; ambulacral areas wide, with two » rows of marginal tubercles which extend from the peristome to the disc; interambulacral areas with two rows of tubercles set near the poriferous zones, from eleven to twelve tubercles in each row, a delicate scrobicular circle of granules around each, and a naked intertubercular space in the centre ; mouth- opening small, situated in a depression ; peristome decagonal ; base finely radiated in consequence of the size and regularity of the interambulacral tubercles. Locality.—Mar\lstone near Ilminster, Somersetshire, and Bre- don Hill, Gloucestershire. Coll. of the late H. Strickland, Esq., and Dr. Wright. Hemipedina Etheridgii, Wright. Pedina Etheridgii, Wright, Annals of Nat. Hist. S. 2. vol. xiii. p.315. pl. 1. fig. 5 a-d. Test small, circular, depressed ; ambulacral areas narrow, with six small perforate tubercles below, and a double row of mar- ginal granules above ; interambulacral areas with two rows of tubercles, seven in each row ; apical disc large and petaloidal ; mouth-opening small; peristome decagonal; lobes nearly equal. Locality.—Upper Lias, Ilminster. Coll. Dr. Wright. 124 Dr. T. Wright on a new Genus of Fossil Cidaride, B. Species from the Inferior Oolite. Hemipedina Bakeri, Wright. Pedina Bakeri, Wright, Annals of Nat. Hist. S. 2. vol. xiii. p. 312. pl. 1. fig. 4 a-e. Test circular, depressed ; ambulacral areas very narrow, with two rows of small tubercles set so far apart that they form a zig- zag row; interambulacral areas with two rows of rather large prominent tubercles, five in a row; apical disc with a pro- minent anal rim; mouth-opening large; peristome deeply decagonal. Locality.—Pea-grit, Inferior Oolite, Crickley Hill. Coll. Dr. Wright : a single specimen. Hemipedina perforata, Wright. Goniopygus’ perforatus, Wright, Annals of Nat. Hist. 8. 2. vol. viii. p- 267. pl. 6. fig. 5 a—d. Test small, circular and depressed ; ambulacral areas with two rows of small tubercles which extend from the peristome to the disc ; mterambulacral areas with two rows of tubercles, seven to eight in each row, three or four secondary tubercles between the primary rows at the base; surface of the plates covered with numerous coarse miliary granules ; mouth-open- ing large; peristome rather deeply decagonal ; lobes nearly equal in size ; apical disc large and foliated. Locality.—Pea-gnit, Inferior Oolite, Crickley Hill. Coll. Dr. Wright. Hemipedina tetragramma, Wright, nov. sp. Test circular, ;9,ths of an inch in diameter; ambulacral areas narrow, with two marginal rows of small nearly equal-sized tubercles extending from the peristome to the disc; interam- bulacral areas with two rows of primary tubercles, about four- teen in each row, and two rows of secondary tubercles, ten in each row, extending from the peristome to nearly the upper surface; mouth-opening small, situated in a depression ; peristome decagonal, unequally lobed. Locality.—Pea-grit, Crickley Hill. Coll. Dr. Wright. Hemipedina Waterhousei, Wright, nov. sp. Test small, pentagonal, rather inflated at the sides ; ambulacral areas with two rows of small tubercles extending from the peristome to the disc ; interambulacral areas with two rows of See. ee ee ee with a Synopsis of the Species included therein. 125 tubercles, eight in a row; scrobicular circles neatly defined ; mouth-opening small; apical disc narrow and prominent, Locality.—Pea-grit, Inferior Oolite, Crickley Hill. Coll. Dr. Wright. Hemipedina Bonei, Wright, nov. sp. Test small, pentagonal, depressed ; ambulacral areas with two marginal rows of close-set tubercles ; interambulacral areas with one entire row and four short rows of tubercles, which extend only as far as the equator; tubercles of both areas about the same size; base flat; mouth moderate in dimen- sions ; peristome unequally decagonal ; apical disc absent. Locality.—Pea-grit, Crickley Hill. Coll. Dr. Wright. C. Species from the Great Oolite and Cornbrash. Hemipedina Davidsoni, nov. sp. Test much depressed, 1 inch in diameter ; ambulacral areas with two rows of marginal tubercles very regular in their arrange- ment throughout ; imterambulacral areas wide, with two rows of primary tubercles, fourteen in a row, and two rows of secondary tubercles which extend beyond the equator, between the former, and two rows of smaller tubercles between the main rows and the poriferous zones, so that at the equator there are six rows of tubercles abreast, whilst on the upper surface there are only two rows; mouth-opening small, in a concave depression ; peristome decagonal and nearly equally lobed ; apical disc absent. Locality.—The sandy beds of the Great Oolite, Minchin- hampton. Coll. Dr. Wright: only one specimen known. Hemipedina Woodwardii, Wright, nov. sp. Test circular, much depressed ; ambulacral areas narrow, with two rows of small tubercles below and extending as far as the equator, diminishing to granules on the upper part of the areas; interambulacral areas with two rows of rather large primary tubercles, eight in a row, and two rows of secondary tubercles, three to four in each row, which scarcely reach the equator, the upper part of the intertubercular space being filled with a small, abundant miliary granulation ; apical disc 126 Dr. T. Wright on a new Genus of Fossil Cidaride, large, anal rim prominent ; mouth-opening small ; peristome decagonal, nearly equal-lobed. Locality—Cornbrash, Wiltshire. Coll. British Museum, from Dr.Smith’s collection ; Dr. Wright. Hemipedina tuberculosa, Wright, nov. sp. Test elevated, subconoidal ?, the precise form unknown ; ambu- lacral areas with two rows of basal semitubercles raised on very prominent bosses diminishing rapidly in size into coarse granules above ; interambulacral areas with two rows of large tubercles set on very prominent bosses, with scrobicular circles of coarse granules surrounding the areolas ; two rows of small secondary tubercles close to the poriferous zones from the peristome to the equator, and three or four at the base of the intertubercular space ; upper surface enveloped in the matrix ; apical aperture large. Locality.—Coral Rag, Wiltshire. Coll. British Museum. Foreign Species of the genus Hemipedina. Hemipedina seriale, Wright. Diadema seriale, Agassiz ; Leymerie, Mém. de la Société Géologique de France, tome ii. p. 330. pl. 24. fig. 1, 1839; Agassiz and Desor’s Cat. raisonné des Echinides, 3 sér. tome vi. p. 348. Test hemispherical, subglobose above, flat below; ambulacral areas with two rows of tubercles nearly as large as those of the interambulacra ; interambulacral areas with six rows of tubercles abreast at the equator, diminishing to four and two rows above ; a few secondary tubercles unequally distributed ; mouth-opening small ; peristome slightly decagonal. Locality.—Inferior Lias, France. Coll. M. Michelin. Hemipedina Woodwardiu, Wright. This species occurs in the Cornbrash of the Marquise, near Boulogne-sur-Mer. In one of the specimens before us the spines are preserved ; the primary spines are not very long, scarcely the length of the diameter of the test; the secondary spines are short and needle-shaped ; the surface of both kinds is covered with fine longitudinal lines. Locality.—The Cornbrash near Boulogne-sur-Mer. Coll. British Museum. a with a Synopsis of the Species included therein. 127 Hemipedina Nattheimense, Wright. Echinopsis Nattheimense, Quenstedt, Handbuch der Petrefacten- kunde, p. 582. pl. 49. fig. 37. Locality.— White Jura, Nattheim. Coll. British Museum. At this moment the specimen is not at our disposal. We shall give a diagnosis of this species in our Monograph. Hemipedina Semanni, Wright, nov. sp. Test small, hemispherical ; ambulacra with two rows of tubercles ; interambulacral areas with one row of primary and two rows of secondary tubercles, the primary tubercles alternating with the secondary tubercles, not placed abreast as in most of the species ; tubercles of both areas nearly the same size. Locality.—Coral Rag, Commercy, Meuse. Coll. Dr. Wright : sent by M. Louis Scemann of Paris. VOL. II, L 128 On some new Species of Hemipedina from the Oolites. ' By Tuomas Wricut, M.D., F.R.S.E. Since the publication of our paper in the August Number of the ‘Annals and Magazine of Natural History,’ on the new genus Hemipedina and the Synopsis of the species included therein, our friend S. P. Woodward, Esq., has kindly sent us three new English forms of this group, one found in the cal- careous grit of Berkshire, and two in the Kimmeridge clay of Bucks ; our friend Thomas Davidson, Esq., has hkewise com- municated a figure of one found by M. Bouchard Chantereaux some years ago in the Kimmeridge clay of Boulogne-sur-Mer ; we lose no time therefore in recording these additions to the Oolitic fauna, at the same time returning our hearty thanks to the kind friends who have so liberally communicated the specimens. A. Species from the Calcareous Grit. Hemipedina Marchamensis, Wright, nov. sp. Test large, and depressed ; ambulacral areas narrow, with two rows of marginal tubercles, nearly as large as those of the interambulacra, extending regularly and without interruption from the peristome to the apical disc, and separated by a zig- zag line of small granules down the centre, the areas retain- ing a nearly uniform width throughout ; poriferous zones form a slightly waved line, from every three pairs of pores being set slightly oblique to the line of the zones ; interambulacral areas four times the width of the ambulacral, with eight rows of tubercles at the equator, each tubercular plate supporting four nearly equal-sized tubercles abreast ; bosses prominent ; areolas surrounded with incomplete circlets of small granules ; mouth-opening less than one-third the diameter of the test ; peristome unequally decagonal ; five jaws, in situ, each jaw having two broad flat central ridges, and two oblique mar- ginal ridges with two intervening depressions ; teeth long, and obliquely truncated at the points. Dimensions.—Transverse diameter 2,9, inches; height 1,3; inch ? Locality.—The calcareous grit of Marcham, Berks. Coll. The Hon. R. Marsham. ae Se eT Dr. T. Wright on some new species of Hemipedina. 129 B. Species from the Kimmeridge Clay. Hemipedina Morristi, Wright, nov. sp. Form and size unknown; test small; ambulacral areas with two rows of regular prominent marginal tubercles gradually dimi- nishing in size from the base to the apex of the areas, and separated by a zigzag line of small granules down the centre ; poriferous zones slightly waved ; pores large, the pairs sepa- rated by thin septa; interambulacral areas more than three times the width of the ambulacral, with six rows of tubercles * at the equator, each plate supporting three nearly equal-sized tubercles abreast; bosses prominent; areolas surrounded by incomplete circlets of small granules. Spines referred to this species long, round, slender, and sculp- tured with delicate longitudinal lines; articulating cavity small, with a smooth rim; head thick, with a thin prominent finely milled ring ; body long, much more slender than the head. Locality. —Kimmeridge clay, Hartwell, Bucks. Coll. Professor Morris. Hemipedina Cunningtonii, Wright, nov. sp. Form unknown, upwards of an inch in diameter ; ambulacral areas with two marginal rows of very small tubercles rather irregular in their mode of arrangement; poriferous zones nearly straight ; interambulacral areas three times the width of the ambulacral, with two rows of tubercles situated on the zonal half of the tubercular plates, leaving thereby a wide in- tertubercular space which is filled with 8 to 10 rows of small granules; the bosses large and prominent, and the tubercles of a proportionate size; areolas surrounded by a complete circlet of small granules the same size as those filling the middle of the areas. Locality—Kimmeridge clay near Aylesbury. Collected by Professor Morris. Coll. British Museum. Foreign Species from the Kimmeridge Clay. Hemipedina Bouchardii, Wright, nov. sp. Test large, depressed ; ambulacral areas with two rows of re- gular marginal tubercles extending without interruption from the peristome to the apical disc, and separated by a median zigzag line of small granules ; poriferous zones straight ; inter- ambulacral areas three times the width of the ambulacral, with 180 Dr. T. Wright on some new species of Hemipedina. ten rows of tubercles at the equator, each tubercular plate hav- ing five tubercles abreast; areolas surrounded by circlets of small granules; spines slender, sculptured with longitudinal lines. Dimensions.—Transverse diameter 2,4, inches ? Locality.—Kimmeridge clay, Boulogne-sur-Mer. Collected by M. Bouchard Chantereaux. Coll. M. Bouchard Chantereaux at Boulogne. In the present state of our knowledge it would be premature to suggest subdivisions, but it is clear that, we have two distinct types in the genus Hemipedina: 1st, those with two rows of large tubercles, and a wide intertubercular granulated space in the middle of the interambulacral areas; and 2nd, those with four, six, eight or ten rows of nearly equal-sized tubercles in these areas at the equator. 131 Note on the Subgenus Limea, Bronn. By Joun Lycert, Esq. Reap 28truH AvcusT 1855. THE present note is intended to direct attention to a peculiarity connected with the external surface of Limea, trivial in its zoo- logical importance, but which is calculated from its persistency to be a useful aid to the paleontologist in the absence of hinge characters. The subgenus Limea has hitherto been distinguished from Lima solely by the presence of a series of parallel teeth upon each side of the hinge-plate, a feature which cannot be ascer- tained in the majority of specimens ; and the only British species of Limea hitherto described has so little in its general aspect to separate it from the young condition of Lima duplicata (a shell which is associated with it in the same beds), that any clear ex- ternal distinction which can be ascertained between them is worthy of notice, more especially when it will also be found to characterize Limea as a subgenus. It is in the auricles that the distinctive feature resides, and it is immediately connected with the hinge-plate beneath: it will be found that the radiating lines which usually ornament the surfaces of the auricles in the Pectens and Lime also exist in Timea, but that in the latter they abruptly disappear towards the outer angle of each auricle, leaving a small triangular smooth area, which is traversed transversely downwards and inwards by a few elevations ; these are placed immediately over and corre- spond to the grooves which separate the teeth upon the hinge- plate. In all well-preserved specimens this kind of surface is visible upon one or both of the auricles, its distinctness depend- ing upon the condition of the specimen with reference to fossi- lization and the greater or less prominence of the internal features. Limea duplicata is abundant in the shelly oolite of Leck- hampton Hill; there is also another more ornamented but un- described species higher in the same formation, and found at many localities in the upper Ragstones of the Cotteswold Infe- rior Oolite. The peculiarity of the auricles is observable equally in both these species. VOL. Il. “M 132 Remarks on the Inferior Oolite and Lias in parts of Northampton- shire, compared with the same Formations in Gloucestershire. By the Rev. P. B. Bropre, M.A., F.G.S. Having, at a late meeting of the Cotteswold Naturalists’ Club, given a vivd voce account of the Inferior Oolite and Lias in a part of Northamptonshire; at the request of the Secretary, I have prepared a more detailed description for our ‘ Proceedings.’ It is well known that certain beds in the Inferior Oolite im the neighbourhood of Northampton have been extensively worked for the ironstone which largely prevails in it thereabouts, though I believe it is not now so generally used for ceconomical pur- poses as it was formerly. This was certainly the case with those quarries which I examined near Blisworth. They are not worked to any great depth, and occupy the higher ground in the district ; the strata consist of sandy ferruginous oolitic stone containing a few imperfect casts of shells, though the greater part of the mass is unfossiliferous: the top beds are coarse, and contain impressions of shells; the lower ones are more com- pact, and are composed chiefly of ironstone. The Inferior Oolite here appears to be of no great thickness, and differs materially - from that of the Cotteswolds. The hills which are occupied by it near Blisworth are comparatively low, and form a striking contrast to those in Gloucestershire partly composed of the same formation. The fossils I obtained were a large Cardium, a Tri- gonia, a Pecten, Terebratule, and a few Univalves. Fossils are much more abundant at Northampton, though only occurring there in the form of casts. Upper Lias.—From the position of the Inferior Oolite, the Upper Lias was to be looked for at a low level at the base of these hills, and I aceordingly found it in a brick-pit in the valley at Bugbrook between Weedon and Blisworth, below the level of the Railway at no great distance from the Kilsby tunnel. Beds of Lias clay and shale are used for brick-making with the usual Upper Lias fossils, among which Ammonites serpentinus and Belemnites were very prevalent. The clay is traversed by a thin, continuous layer of limestone, which, as I anticipated, turned out to be the ‘fish bed,’ identical litholo- gically with the same band in Gloucestershire, and full of innu- merable fragments of fish (though I could discover none entire) and coprolites, with some specimens of Inoceramus dubius and traces of Sepia. 3 ee tr see ee On the Inferior Oolite and Lias of Northamptonshire, &c. 133 This ‘fish bed’ has been noticed by Mr. Morris in parts of Lincolnshire and Northamptonshire on the Great Northern Rail- way, and it is very probable that it will be detected in other places where the Upper Lias occurs in situ, since it is rarely wanting, in its course through Somersetshire and Gloucester- shire, at the lower part of this deposit. In fact, this ‘ fish and insect bed’ seems as persistent in the Upper Lias as the ‘ Insect limestone ’ is in the lower. The section at Bugbrook is as follows in descending order :— ft. in. 1. Rubbiy white limestone in detached bits, in dark blue shale, with } rey numerous fragments of Ammonites ..............ee ee eee 2. Thin-bedded limestone (‘ fish bed’); white externally, inside has a green tinge with white specks; it has a laminated fractines | and splits readily when weathered ; it does not occur in nodules, but in a regular thin band in the clay J 3. Thin, coarse, dark-coloured slaty stone, very rough, covered with spines, teeth and plates of Echinoderms, resting on the marlstone. 3 CT The thickness of the Upper Lias visible at this spot did not exceed a few feet; it is succeeded by the Marlstone with the usual fossils. I could not determine the total thickness of the Upper Lias, as there was no section exposed, but there must be a considerable mass of clay between the Inferior Oolite and the small section at Bugbrook, though probably not half so thick as the Upper Lias in Gloucestershire, which, according to Mr. Hull of the Geological Survey, amounts at least to 200 feet in many parts of the Cotteswolds. These strata, as well as those of the Inferior Oolite, are per- fectly horizontal. When the Railway was in progress, the top beds of the Lower Lias just below the Marlstone were exposed at Kilsby, and were as usual very rich in fossils, similar for the most part to those found in the equivalent strata at Campden, and Hewlett’s Hill near Cheltenham. The summit of Edge Hill in Warwickshire is capped by the Marlstone, the Upper Lias having been denuded; but small boulders of the ‘ fish bed,’ containing scales of fish and ‘ Inoce- ramus dubius,” are of frequent occurrence in the vale below, showing that it formerly occupied its normal position above the Marlstone in that district. At Alderton, in Gloucestershire, the following strata were ex- posed below the ‘fish bed’ in April 1856, which seemed to be richer in fossils than usual, and therefore I have noted them here, which will enable the reader to compare them with those at Bugbrook above mentioned. Brown and dark shales with many Ammonites, Inoceramus M 2 134 On the Inferior Oolite and Lias of Northamptonshire, &c. dubius, Rostellaria (abundant), Cidaris*, Nucula, Avicula, and Aptychus. These are succeeded by two or three blue marly bands divided by shale, which contain a univalve like a Ceri- thium, Avicula, Nucula, Pholadomya, Pecten, Astarte, and Am- monites. A light blue, slightly indurated marl reposes imme- diately upon the Marlstone. The total thickness of these clays and marls forming the base of the Upper Lias is about 30 feet. * A similar small species of Cidaris (C. minuta) occurs abundantly with spines attached in the Upper Lias shale at Gretton near Winchcomb, where a fine specimen of a Lepidotus was lately discovered in the ‘ fish bed,’ and is now in the collection of my friend Dr. Wright. Notes on the Genus Quenstedtia. By Joun Lycerr, Esq. Reap 16ru SerremBeR 1856. Turs genus of Lamellibranchiate Conchifera, described in the Great Oolite Monograph of the Palzontographical Society, was founded upon two shells figured in Prof. Phillips’s ‘ Geology of Yorkshire,’ under the names of Pullastra oblita and Psam- mobia levigata, the former of them being chosen as the type of the genus. Of Pullastra oblita, I have succeeded in clearing and exposing the hinge of each of the valves in many instances, and am per- fectly conversant with its characters, which will be found correctly described in the Monograph alluded to. The siphonal, pallial and muscular scars were ascertained in a cast from the York- shire Dogger, and upon the characters supplied by these satis- factory materials the genus was founded. Specimens with the test preserved, and which admit of the hinge characters being . exposed, are obtained in the upper portion of the Inferior Oolite of the Cotteswolds; a single young example of the species only having been afforded by the Great Oolite of Minchinhampton. In the Great Oolite Monograph it was stated to be allied to Psammobia, but distinguished from it by the dental characters of the hinge, and by the absence of an elevated nymphal plate to sustain the ligament. The general resemblance which the aspect of this shell presents to the Mactromya mactroides of Agassiz had not been overlooked, but as the figures of Mactromya mac- troides, in the ‘ Etudes critiques’ of that author, consist for the most part only of casts, which afford no information respecting the hinge, it was considered unadvisable to allude to the pro- _ bable identity, as it was certain that Quenstedtia possessed no affinity either with Mactra or with the family of the Myade, and the shells of Phillips had priority as species. This supposed identity of Quenstedtia oblita with the Mactromya mactroides of Agassiz, has recently been fully confirmed in the publication by M. Terquem of an elaborate work, with plates, entitled, ‘ Obser- vations sur les Etudes critiques des Mollusques fossiles, com- prenant la Monographie des Myaires de M. Agassiz.’ In this work the author has figured and described the Mactromya mac- 136 Mr. J. Lycett on the genus Quenstedtia. troides; the figures representing the shell and cast of the interior under different aspects : upon the same plate (No. 5) are placed figures of the recent Psammobia vespertina for comparison ; the conclusion drawn by the author from this comparison is that Mactromya mactroides is a Psammobia. It will be observed that in these figures, the author has altogether omitted one of the most essential points of comparison necessary to establish a generic identity, the hinges not being exhibited; he has, however, given casts of the interiors of the valves in both the shells, in- cluding the siphonal, pallial and muscular scars, but these afford no information respecting the hinge. The author arranges Mac- tromya mactroides with M. tenuis, M. brevis and M. litterata, all of which group he believes to be Psammobie; he also states that the group has a small! cardinal tooth in each valve, which he regards as an abnormal variation from the dentition of Psammobia vespertina, which has two teeth in each valve. As the author does not state expressly that he has cleared and exposed the hinge in each valve of Mactromya mactroides, and as he is careful to record similar facts relating to other genera, I am led to infer that his knowledge of the hinge in the shell in question has been derived either from the partial exposure exhibited by the valves when in contact, or from other imperfect evidence. How- ever this may be, it is certain that the hinge is altogether unlike that of Psammobia; to avoid the trouble of reference, I subjoin the hinge characters of the fossil shell :— Quensteptia. Hinge in the left valve consisting of one obtuse, oblong and transverse tooth, slightly compressed from above, situated beneath the unbo and received into a corresponding oblong pitin the hinge-plate of the opposite valve. There is therefore no tooth in the right valve and consequently no pit in the left valve. This kind of hinge, which so nearly resembles that of the fossil genus Myoconcha, is altogether distinct from that of Psammobia, with its two grooved, diverging hinge-teeth in each valve. The ligament is received into a narrow, lengthened and deep area posterior to the umbones ;—the shell is therefore destitute of the elevated nymphal plate of Psammobia. The siphonal flexure, as may be observed in the figure given by M. Terquem, is less considerable than in Psammobia, and, unlike that genus, it is united posteriorly to the pallial lme only at its extremity, so that with the pallial line it forms a narrow tongue, the upper and lower borders of which are limited by the gradual convergence of the two lines : in Psammobia the siphonal and pallial lines are united in a position nearly vertical beneath the umbo, and proceed posteriorly united into a single line. The Mr, J. Lycett on the genus Quenstedtia. 137 aggregate of these characters, it must be admitted, fully justifies the separation of Quenstedtia from Psammobia; and it yet remains to be demonstrated that true Psammobie are found in any rocks older than the Tertiary system, none of the so-called Jurassic Psammobie having hitherto exhibited the characters of that genus free from ambiguity. we. 2 — eee 139 Remarks on the Lias of Barrow in Leicestershire, compared with the lower part of that Formation in Gloucestershire, Worcester- shire, and Warwickshire. By the Rev. P. B. Bropirz, M.A., E.GS., Vice-President of the Warwickshire Naturalists’ Field Club. Reap 27TH JANuARY 1857. i} Durine a late visit to the well-known Lias quarries at Barrow- on-Soar, I was able to compare the various sections there exposed with those in the equivalent beds in Warwickshire, Worcestershire, and Gloucestershire ; and, although I could de- tect no remains of Insects, nor even ‘a trace of them*, the posi- tion of the strata, and their lithological characters, are identical with the true Insect limestones in the counties above men- tioned. As Mr. Jukes has already described the lower Lias at Barrow and the neighbourhood in ‘ Potter’s Charnwood Forest,’ it will be needless for me to repeat those sections ; but it will be neces- sary to give one not referred to by him, taken from an upper quarry of Mr. Lee’s, in order to identify the beds,—where we have, in descending order, ft. in. 1. Alluvial drift, sand and red clay,’with rolled boulders of Lias 8 0 mp blite wlistlels, He saree yascuak (b cacearel sa Pe nesags tl dessuenesubceRb ames 3.0 Hard blue limestone (Rummels), ith young Plagiostoma gi- 3 { gantea, Lima rudis, and numerous Ammonites, similar too 9 the Plagiostoma-bed in Gloucestershire ..............seeeeeeee Re MNICK (Wlixe SHBG ureateescre tases tetasacescdoenanst seecscesceseenec de 4 0 5. Blue limestone (representative of Insect-bed) ...........se0000e 0 6 eb Es ache shia’ 25s cei ties cach cates shades daawaceesniddopleasiongeavaice akties Lyy2 7. Limestone (representative of Insect-bed) .......e:ccsseseeseeeees 0 6 PESACH SAIC c 0. sce cecabele cemeinteends «aces dusaccsssenssenesd dode ss ars 1 0 Blue nodular and crystalline limestone (top hurls)—a very 9 peculiar band, resembling a bed near to the ‘firestone’ of jo 6 Warwickshire, as at Grafton in that county ...............66 10. Shale. Bottom of quarry. 19 5 As Mr. Jukes truly observes, the strata vary considerably even in adjacent quarries—certain beds thin out and others come * Although, in the short examination I was able to give the Barrow limestones, I could discover no Insect remains, nor could hear of any ever having been found, it is possible that a closer research would detect them. VOL. Il. N 140 Rey. P. B. Brodie on the Lias in; thus, in Mr. Ellis’s large pit on the other side of Barrow, there is at least 30 feet of shale above the ‘rummels,’ No. 3 in section, and there are more courses of limestone, especially those which appear to represent the Insect limestone. It is worthy of note, that while the Rummels No. 3 is evidently the equivalent of the Plagiostoma-bed in Gloucestershire and elsewhere, it is succeeded at once by the beds of Lias, which in Gloucestershire, Worcestershire, and in some portions of Warwickshire, occur much lower in the series, the intervening strata being entirely wanting in that part of Leicestershire. Most of the quarries do not exceed 30 feet in depth, but some have been opened to a depth of 42 feet, the lowest stratum being a bed of blue marly clay. The limestones are used in Leicestershire for the same economital purposes as the Warwickshire ‘ paving-stones,’ and are equally adapted for this object ; but they do not seem to be employed for making hydraulic lime, as they are in the quarries belonging to my friends Messrs. Greaves and Kershaw at Wilm- cote, near Stratford-on-Avon. In places there are several small faults, and in one pit the lower strata were thrown up so as to form a complete saddle, of limited extent, at right angles to Mount Sorrel, not far off,— showing on a small scale what the effect of such a dislocation would be on a large one. Except in No. 3 of section, shells are scarce; below this, I observed only a few Ammonites planorbis and Aptychus, and a long shell (Meleagrina?) common in the shale at Brockeridge Common, near Tewkesbury in Gloucestershire, and there asso- ciated with numerous and beautiful specimens of the same Am- monite. The fine Saurians and Fish for which this district has been long famous occur more or less in all the shales and limestones, though some courses are richer than others; and for the last two years very few have been met with. In Mr. Lee’s extensive collection, the genus Dapedium was by far the most abundant, many of which were quite perfect ; and among several fine fish, I noticed one nearly 2 feet in length, belonging to a different genus, and in a remarkably fine state of preservation. The only Crustacean I observed was the Eryon Barroviensis (M‘Coy), which was small and ill-preserved, and by no means equal to the large and perfect specimens met with occasionally at Bidford in Warwickshire*. I did not detect any remains of plants. * This species is not uncommon in the Insect limestone at Strensham in Worcestershire (where the finest Insects have been obtained, but the pits are now, unfortunately, closed), and Forthampton, near Tewkesbury, where they are generally well preserved, though invariably of small size. of Barrow in Leicestershire. 141 At Wilmcote in Warwickshire there are indications of nu- merous faults (which were lately pointed out to me by Mr. Kershaw), in all directions round the district, more than are generally supposed. Thus the ‘firestone,’ which is the lowest and hardest stratum worked, crops-out at various points and dips at a considerable angle, on the higher ground; and the several bands of ‘Insect limestone’ and shale lie in a basin formed by the outcrop of this lower bed. The ‘ Plagiostoma- bed,’ containing P. gigantea, Cardinia ovalis, and Astarte lurida, occurs in places in its normal position ; but there appears to be no trace of the underlying Saurian beds, which are of consider- able thickness in Gloucestershire, and their absence is to be noted both at Wilmcote and Barrow, which implies a great thinning-out of the lower Lias in that direction. This holds good, at all events, with respect to the lower Lias at the latter place, where there are fewer bands of ‘ Insect limestone;’ but at the former they are more numerous, not less than eight courses divided by thick shale ; and as the ‘ Insect-bed’ in Gloucestershire is often confined to one, or at most two layers, only a few inches thick, the increased number of ‘ Insect-beds’ in Warwickshire may represent the ‘ Saurian beds’ in Gloucestershire and other places, with which they were perhaps coeval in point of time. The ‘firestone’ above referred to is a hard, crystalline lime- stone, full of oysters and spines of Echini, from 3 to 7 inches thick. In Warwickshire it always underlies the last bed of ‘Insect limestone,’ but does not occur in Leicestershire. I have only seen two specimens of the large Eryon from Warwickshire, one of which is in my own collection, and the other in that of my friend Mr. Kershaw. I am indebted to his kindness for another fine but appa- rently distinct species of this genus. The largest measures 6 inches in length from the top of the head to the extremity of the tail, and a little more than 2 inches in breadth in the widest portion of the body. 142 On the Sands intermediate the Inferior Oolite and Lias of the Cotteswold Hills, compared with a similar Deposit upon the Coast of Yorkshire. By Joun Lycert, Esq. Reap 28TH Jury 1857. My friend Professor Buckman having invited me to throw to- gether some geological conclusions to serve as a foundation for a discussion, I select a subject which has already received some consideration at the hands of the Club, and which, from its local position, and a difference of opinion which has arisen with respect to the zoological affinities of its fauna, seems to claim some further examination. I allude to the series of micaceous sands and marls which are situated intermediate the Inferior Oolite and Lias, and which are known to English geologists generally as the Sands of the Inferior Oolite, and to continental cultivators of the science as the Jurensis marls; the Grés Supraliassique ; the Hydroxyde Oolithique; the superior portion of the Upper Lias; the Lias Zeta of Quenstedt, &. Dr. Wright* and Mr. Hull+ have each recently exemplified this deposit in copious and well-known memoirs; but as regards the Cotteswold Na- turalists’ Club, the present is the first communication which has been presented to it in a written form. The conclusions arrived at by the authors above referred to are based solely upon zoo- logical evidence, and are therefore liable to be affected by sub- sequent additions, which may tend to alter the relative propor- tions of Oolitic or of Liassic species found in the deposit ; and as some interesting accessions to its fauna have recently been made, more especially in the lower fossiliferous zone, which was but little known until within these few months, I present a notice of them, with the remark, that although as contributions they possess some value, they by no means afford a triumph to any foregone theoretical conclusions ;—that they may be com- pared rather to a portion of the materials forming a part of the structure of a buried edifice whose proportions are not yet fully developed, and of whose full history so much yet remains to be * “Qn the so-called Sands of the Inferior Oolite.”” Journ. Geol. Soc. 1856. t+ Mem. of the Geol. Surv. of Gr. Brit. “The country around Chelten- ham.” 1857. Mr. J. Lycett on the so-called Sands of the Inferior Oolite. 143 ascertained, that at present it would be injudicious to indulge in absolute conclusions respecting it. This sandy deposit must be seen to be fully appreciated: presenting much variability in its thickness throughout its long course in the Cotteswolds, it is everywhere readily recognized, and even the approximate position of any small exposures of it may be predicated with tolerable exactness. Unfortunately, nearly the whole of the Cotteswold sections are of a small and imperfect character, con- sisting chiefly of cuttings of rock upon deep lane-sides, or upon the banks of water-courses ; and although these in the aggregate exhibit the entire physical features of the deposit, they do not enable us to ascertain the thickness of the whole, in particular localities, with any near approach to accuracy. We can there- fore only estimate the thickness by tracing upwards the beds upon hill-sides, and occasionally by examining the rock brought up during the process of well-sinking. From information ob- tained in this manner, it would appear that the thickness of the sands varies in the middle Cotteswolds from 35 to 80 feet ; and Mr. Hull has shown that over the northern and southern Cottes- wolds they present even a greater amount of variability in thick- ness. My own observations lead to the conclusion, that, like the mass of the Inferior Oolite generally, the thickness is greater upon the outer western escarpment of the Cotteswolds than in the interior valleys, where they are far remote from the outer range. In tracing upwards the beds from the Lias there occurs the following general order of succession :— soragtaer lias clay, grey or blue, soft, and clearly distinguished rom B. Brown or chocolate-coloured, marly, micaceous sandstone, with frequent red ferruginous stains between the lamination; occasionally the stone is more argillaceous, and buries the hammer when struck; in other instances, from the presence of portions of shells, it is more hard, but is peculiarly irre- gular and uncertain both in hardness and colour, varying from a blackish-grey to a bright foxy or reddish hue, every- where glittering with micaceous particles. At about 4 feet from the base are usually one or two thin bands charged with fossils, the greater number of which are very imperfectly pre- served: this may be designated as the lower shelly zone, and may be studied in small Jane-side sections at Nailsworth and at Brimscombe. In the Yorkshire exposition of the deposit, I shall subsequently show that a shelly zone occurs in a similar position. Passing upwards from 10 to 20 feet, there occurs a general diminution of compactness in the rock, and of its marly structure ; there gradually sets in 144 Mr. J. Lycett on the so-called Sands C. Micaceous, foxy-coloured or yellowish, incoherent sands, seldom much compacted, but locally becoming soft sandstone, from 20 to 40 feet, abruptly terminated upwards by D. Concretionary marly bed, usually darker in colour than the sands, but varying much in structure and aspect within short distances, and everywhere more or less fossiliferous ; the tests of Mollusca are less frequently preserved than in the lower zone. A constant mineral feature is the presence of small oval grains of hydrate of iron disseminated through the rock ; a structure which, however, is not peculiar, as it is present in the Inferior Oolite at Dundry and in the Lias of France. From 2 to 4 feet is the thickness of this bed in the Cotteswolds. Immediately overlying this upper Ammonitiferous bed are several others of hard brown or yellowish calcareo-siliceous sandstones, in which fossils are usually very sparingly distributed, and, from the evidence these afford, the beds have by universal consent been assigned to the Inferior Oolite. In Yorkshire, the lofty iron-bound coast at the Peak and at Blue Wick exhibits the same remarkable deposit in considerable thickness, and slightly modified’ in its mineral character from the Cotteswold Sands. In a visit which I recently made to this coast, in company with my friend Professor Morris, the identity’ of the lower portion of the Dogger or Inferior Oolite of Phillips with the Gloucestershire Sands was strongly impressed upon my mind. At Blue Wick the Dogger is altogether about 80 feet in thickness, and rises in successive beds in descending order from the rocky beach into the face of the lofty cliff, the lower 40 feet representing the sands of the Cotteswolds. Beneath these suc- ceed the hard beds of the Upper Lias Shale, 200 feet thick, followed by the Middle Lias, nearly equal in mass; ultimately, at the Peak, facing Robin Hood’s Bay, these great deposits are all exposed in one vast unbroken section, forming a lofty mural cliff, nearly 400 feet in height and three miles in length, in the course of which the Dogger attains the summit of the cliff. Words are scarcely adequate to express my admiration of this grand exposition of the lower Jurassic rocks, which for extent and completeness can scarcely be paralleled. Proceeding north- wards, the upper 40 feet of the Dogger loses more than half its thickness, and the lower portion, or representative of the Sands, thins out altogether ; a great fault then succeeds, by which the Middle Lias is upraised to the summit of the cliff. The highest bed of the Upper Lias consists of black, finely laminated -shale, the transition to the sandstone above being abrupt and very distinctly marked. The sands are here com- pacted into thick-bedded, dark grey micaceous sandstones in of the Inferior Oolite. 145 the lower part, and imto brownish or foxy-coloured micaceous sandstones in the upper part, so that the whole nearly resembles the Cotteswold Sands, and differs chiefly in its greater compact- ness. Fossils are distributed very sparingly throughout the mass of the sandstones, but they are present more abundantly, as in the Cotteswolds, in two calcareo-argillaceous zones, situated in like manner, the one at the top, the other near to the base of the series. The lower fossiliferous zone is a dark grey concre- tionary band of rock crowded with valves of Lingula Beanii ; in smaller numbers are Orbicula reflexa, Vermetus concinnus, Avicula inequivalvis ? and another Avicula, a small smooth Pecten, Cert- thium, &e. Belemnites are not uncommon, but Ammonites are rare, and are obtained singly and at intervals throughout the sandstones; these are, A. variabilis, var. Beant, A. striatulus, and A. Aalensis; the latter form has not been observed in the Cotteswolds, but occurs in the same stage (Lias Zeta of Quen- stedt) in the Jura. Vermetus concinnus occurs at intervals throughout the sandstones in small groups, and usually isolated. The dark grey colour of the lower beds of sandstone changes upwards to a foxy hue, and at the summit is the upper fossili- ferous zone, from 14 to 18 inches thick, concretionary and dark-coloured ; altogether it nearly resembles the Cotteswold bed at Haresfield Hill, with Cephalopoda. In lke manner, each abounds with a Terebratula, which is its predominating fossil ; the Yorkshire shell is the Terebratula trilineata of Young and Bird, T. ovoides, Sow., a larger form than the subpunctata of Haresfield, but which very much resembles the latter shell when collected indiscriminately at each locality, and without prefer- ence to presumed typical forms: unfortunately, the Blue Wick specimens are more frequently compressed and distorted. Other _ fossils recognized are, Pleurotomaria subdecorata, D’Orb., which also occurs at Nailsworth ; Belemnites compressus, B. irregularis, and portions of Ammonites. Rhynchonella cynocephala has occurred very rarely, and several specimens of R. bidens are also recorded. The thick sandstones of the Dogger which overlie this zone abound with small quartzose pebbles, which are never seen beneath the ¢rilineata bed. In Gloucestershire, the lower zone at Brimscombe and Nails- worth has produced the Liassie Orbicula reflexa, Avicula in- equivalvis?, Lima Galathea, Ammonites Raquinianus, which is the crassus of Phillips, and another tumid form which much resembles it, and may be only a distinct variety. These have not been found to pass into the upper zone; but the oolitic ele- ment is fully represented in this lower zone by certain Conchi- fera, as Myoconcha crassa, Perna rugosa, Trigonia striata, Pho- ladomya fidicula, Modiola cuneata, Goniomya angulifera, Mytilus 146 Mr. J. Lycett on the so-called Sands lunularis, Modiola ungulina, Gresslya abducta, and Modiola com- pressa. The upper zone contains in addition the following Oolitic species:—Cypricardia cordiformis, Hinnites abjectus, Astarte excavata, Sow., var., A. detrita, Macrodon Hirsonensis, Modiola Sowerbii, Gervillia Hartmanni, Gresslya conformis, Homomya crassiuscula. Pecten teatorius and Turbo capitaneus appear to have a considerable stratigraphical range, as they are found from the Upper Lias to the Inferior Oolite inclusive. Of the eighteen Ammonites, which appear to include fifteen distinct species, several are undoubtedly derived from forms which occur in the higher beds of the Upper Lias shale of the counties of York and Somerset ; others seem to be proper to the stage, and not one of the Ammonites passes upwards into the Inferior Oolite. The Brachiopoda appear to be entirely Liassic deriva- tives ; and even Rhynchonella cynocephala, which, from its abun- dance and wide diffusion, seems to offer a good designation for the stage (Cynocephala-stage), is perhaps nothing more than a variety of R. acuta,—the number of plaits, whether anterior or lateral, affording no constant or reliable distinctive character ; in other respects the general figure of both is absolutely the same. The single Nautilus, N. latidorsatus, is also Liassic. On the other hand, in the numerous Conchifera the Liassic element nearly disappears altogether, and we find a considerable infusion of the Oolitic, leaving, however, no inconsiderable number of species which appear to be proper to the stage. It is indeed a very striking but undoubted fact, that of the very numerous Liassic Conchifera and Gasteropoda, not more than four or five are continued into the Cynocephala-stage, and even of these two only are found in the upper zone. The more common Upper Lias Ammonites (Lias Epsilon) are equally absent in the Cynocephala-stage, as A. communis, A. serpentinus, A. bifrons, A. annulatus, A. exaratus,’ A. elegans, Y. & B., A. fimbriatus. A. striatulus is strictly identical with the Liassic form ; but the common Cotteswold form of A. variabilis var. dispansus offers well-marked distinctions from the Liassic variety, which, as it is the A. Beant of Simpson, may be termed the variety Beanii. The variety dispansus is more compressed, the volutions more enveloped ; both the fasciated tubercles and the ribs are smaller, less prominent and more numerous; the ribs being much more curved near to the keel. The Liassic variety, however, occurs very rarely at Frocester Hill. Ammonites opalinus 1 have omitted altogether, as the single specimen found lying upon the ground at Haresfield Hill may have been derived from those superin- cumbent Inferior Oolite beds to which it has been referred by Quenstedt and Oppel. The species alluded to is the opalinus of Reinecke, Zieten, and Quenstedt, but not the primordialis of of the Inferior Oolite. 147 Schlotheim and D’Orbigny, which is sometimes confounded with it. A. primordialis is an Upper Lias species. Two forms of these Cotteswold Ammonites appear hitherto to have been un- described ; these will shortly appear, under the names of J. Moorei and A. Leckenbyi* ; the former is allied to Aalensis, the latter to hircinus. The statement that these Ammonites all cease with the high- est bed of the stage, needs some little qualification: a single specimen of A. striatulus and A. variabilis has occasionally been detected in the lowest of the hard brown beds which overlie the Cephalopod-bed at Frocester Hill; Belemnites and Rhynchonella cynocephala are more frequent. Whether, however, these Tes- tacea may have been washed into the newer bed, or may for awhile have lingered there as living denizens, is of little moment, as it is certain that the occurrence is of a local nature, and ex- tends only to the lowest bed of the Inferior Oolite. In assigning to the Sands the provisional rank of a distinct zoological stage, my conclusions are founded upon a review of its fossils compared with those of the Upper Lias “ Epsilon” on the one hand, and of the Inferior Oolite on the other, to each of which they offer certain approximations, in some instances amounting to absolute identity, in others to the more distant affinities of varieties; after deducting these, a considerable num- ber still remain, which appear to be proper to the stage. This view is to some extent in accordance with that of Quenstedt, who, in his ‘Jura,’ has separated the Jurensis marls from his Lias “‘ Epsilon,” or Upper Lias shale, into a distinct subdivision or stage of the Lias, under the name of Lias “ Zeta.’ It may be preferable for the present to allow it to remain as an independent stage until more extended observations shall have been made,— more especially until the Testacea of the Lias “Epsilon” shall have been more fully figured and described. In this respect it may rank as of the same stratigraphical value as the Cornbrash or the Kelloway Rock, a theoretical arrangement which will leave the problem to be determined by future researches, viz. to which of the two great formations bordering it, its fossils offer as a whole the nearest approximation. Considerable as the list of these has now become, it is evident that much still remains to be done; other localities require to have their fossils better collected and examined. How insufficient is our list from Dor- setshire ; how few species have been distinctly assigned to the stage in Yorkshire; how short a time has elapsed since the fossils of the lower zone have been collected in the Cotteswolds ; how meagre is the list of M. Eugene Deslongchamps from Cal- * The Cotteswold Hills: Handbook to their Geology and Paleontology. 148 Mr. J. Lycett on the so-called Sands vados; and, in the Mozelle, how considerable a number of the species remain undetermined! The recollection of these defi- ciencies should induce us to discourage for awhile all decisive conclusions, and lead us rather to compare our acquisitions from time to time, carefully and rigidly subjecting them to the necessary comparisons, free from the bias of preconceived opinions. In the Cotteswolds, 56 Testacea have been obtained in the upper, and 54 in the lower zone; in all, 81 species,—divided into, Cephalopoda, 22; Brachiopoda, 4; Gasteropoda, 9; Con- chifera, 46. The following amended list of fossils from the Cynocephala- stage of the Cotteswolds offers some additions and corrections to those previously published, and is divided into two distinct zones. » Upper Zone at Frocester Hill, at Haresfield Hill, and at various other smaller sections. Ammonites variabilis, D’Ord., var. Beanii. variabilis, var. dispansus. striatulus, Sow. radians Orbignianus, Schlot. « radians Dewalqueanus, Rein. comensis, De Buch. insignis, Schub. —— ——,var.with compressed back. subinsignis?, Op. —— Jurensis, Ziet. discoides, Ziet. —— Boulbiensis, Y. & B. —— Levesquei, D’Orb. —— torulosus, Schub. —— Moorei, Lyc. —— Leckenbyi, Lyc. Belemunites tripartitus, Schlot. irregularis, Schlot. compressus, Voltz. Nautilus latidorsatus, D’Orb. Turbo capitaneus, Miinst. Cerithium papillosum, Desh. Cypricardia cordiformis, Desh. brevis, Wright. Cucullea ferruginea, Lyc. Tancredia, n. sp. Cardium Hullu, Wright. Opis lunulatus, Sow., var. Opis carinatus, Wright. Trigonia Ramsayi, Wright. striata, Sow. costata ? Astarte complanata, Rem. excavata, Sow., var. —— detrita, Goldf. lurida, Sow., short, gibbose var. Macrodon Hirsonensis, D’ Arch. Gryphezea plicata, Lye. Hinnites abjectus, Phil., sp. Lima Electra, D’Orb. bellula, Mor. § Lyc., var. Modiola Sowerbyi. Pecten textorius, Schlot. Gervillia Hartmanni, Goldf. Pinna fissa, Goldf. Goniomya angulifera, Sow., sp. Pholadomya fidicula, Sow. arenacea, Lyc. Gresslya abducta, Phil., sp. conformis, Ag. Myacites arenacea, Ag., sp. , Species undet. Homomya crassiuscula, Mor. §& Lye. Terebratula subpunctata, Dav. Rhynchonella eynocephala, Rich. Jurensis, Quenst., var. of the Inferior Oolite. Lower Zone at Nailsworth and Brimscombe. Ammonites variabilis, var. dispansus. Nucula Jurensis, Quenst. —— Raquinianus, D’Orb. ——, species allied to Raquinianus. — Jurensis, Ziet. radians Orbignianus, Schiot. striatulus, Sow. subinsignis ?, Op. — concavus, Sow. Belemnites compressus, Voltz. tripartitus, Schlot. Nautilus latidorsatus, D’ Orb. Turbo capitaneus, Miinst. Trochus duplicatus, Sow. Pleurotomaria subdecorata, D’ Orb. Chemnitzia lineata, Sow., sp. , Species undet. Natica adducta, Phil. - Oppelensis, Lye. Orbicula reflexa. Astarte lurida, Sow. complanata, Rem. —— rugulosa, Lye. Trigonia striata, Sow. Cypricardia brevis, Wright. cordiformis, Desh. Cucullea ferruginea, Lyc. oliveeformis, Lyc. Cardium Hullii, Wright. Unicardium, sp. indet. Myoconcha crassa, Sow. Perna rugosa, Miinst. Goniomya angulifera, Sow., sp. Gervillia Hartmanni, Mist. fornicata, Lyc. Avicula inzequivalvis ?, Sow. Modiola cuneata, Sow. Sowerbii, Sow., sp. —— compressa, Miinst. ungulina, Y. § B. Mytilus lunularis, Lye. , Sp- indet. Lima Electra, D’Orb. bellula, var., Mor. § Lye. Galathea, D’Ord. —— ornata, Lyc. , 1. Sp. Pholadomya arenacea, Lyc. — fidicula, Sow. ; Sp- indet. Myacites arenacea, Lyc. » Sp. indet. Rhynchonella cynocephala, Rich. —— plicatella, var. 149 150 On the Discovery of Cnicus tuberosus at Avebury, Wilts. . By Professor Buckman, F.L.S., F.G.S., F.A.S. &. Reap 6TH OcToser 1857. In reporting upon our meeting at Avebury, Wilts, on July 15, 1856, I took occasion to remark upon some interesting plants which I had obtained from the Druidical Circle; and amongst notes upon others, will be found the following :— “ Cnicus acaulis, Stemless Thistle, with—anomalous as it ap- pears—stems several inches high. This is one of the forms which has given rise to the many, synonyms by which the true species is surrounded*.” In July of the present year, I found myself at the Avebury _ Circle, in company with my friend Edwin Lees, Esq., F.L.S., F.G.S., when this Thistle was more minutely examined by us ; and, upon carefully getting some specimens up by the roots, we were pleased to find that it agreed in this and other respects with the Cnicus tuberosus, Willd., Tuberous Plume Thistle,—a specimen of which appears to have been sent by A. B. Lambert, Esq., to Sir J. E. Smith, and is figured in ‘English Botany,’ t. 2562, to the description of which is appended the following habitat :—“ A copse-wood, called Great Ridge, on the Wiltshire _ Downs, between Boyton House and Fonthill, abundantly :” and Smith states that he there gathered it in 1819+. For many years, however, this form appears to have become extinct in this its original habitat ; and it was thought to have been entirely lost to our flora until within the last few months, when my friend Mr. W. Cunnington of Devizes fortunately dis- covered that a nurseryman in his neighbourhood had propagated the plant from its original stock presented to the nurseryman by Lambert himself. The two or three specimens thus handed down are now in Mr. Cunnington’s possession ; and upon paying him a visit at Devizes, on our way from Avebury to Stonehenge, I was gratified to see a specimen in full flower in his garden, as well as two dried examples in his herbarium; from an examina- tion of these, I am enabled to declare their complete identity with those I had so recently gathered at Avebury. Here, then, we have a curious example of a plant having been * Address to the Cotteswold Naturalists’ Club, by Prof. Buckman, Jan. 27, 1857, p. viii. + English Flora, vol. i. p. 393, Prof, Buckman on Cnicus tuberosus. 151] lost for many years in one locality, and subsequently occur- ring in another; and yet, though the collecting botanist may perhaps felicitate us upon restoring this to the British flora, I have myself great hesitation in receiving it as a true and un- doubted species, the grounds for which I would shortly sum up as follows:— It occurs sparingly at Avebury, surrounded by the true Cnicus acaulis and Cnicus acanthoides in great abundance. Its most important distinctive character will be found in the radical tubers, which, in full-grown examples, are somewhat large and fleshy, and unilaterally placed on the rhizome. In smaller specimens the roots are long and flexile, but not ex- panded into tubers,—which is just the state in which they occur in the Cnicus acaulis. It is true that it cannot be described as acauline, as the stem is more than a foot in height; but this is also often the case with the true acaulis, as we have now before us examples of this spe- cies several inches high. , From these circumstances, in connexion with the rarity of the tuberous form in a plant that seeds so abundantly, each head of flowers being capable of perfecting as many as 150 seeds,— taking also into consideration the well-known sporting propen- sity of this genus,—I cannot help thinking this to be a hybrid; and from the fact of the abundance of the two forms before indi- cated in its immediate vicinity, we may not unreasonably look upon them as the origin of our tuberous type. ‘ There is perhaps no genus of plants more perplexing to the botanist than that of Carduus, which is now made to include Cnicus ; hence the variation in the number of species in our different floras; and thus Babington heads: his descriptions of them with the following significant note— many hybrids occur in this genus*;” and my friend Lees has kindly furnished me with the following note upon another disputed species, which bears directly upon this question :— _ “Tn August 1856, I found the Cnicus Forsteri of Smith, in a field near Crowle, Worcestershire. In the same marshy field was a considerable quantity of Cnicus pratensis and a very nu- merous growth of C. palustris. The position of Forster’s Thistle was between the C. pratensis and C. palustris, so as to give rise to an immediate suspicion of its hybridity ; and, upon examina- tion, the characters shown by C. Forstert were exactly interme- diate also. The leaves were much like those of C. palustris, while the stem and flowers were in small clusters, instead of being single as in the latter. Indeed, the result of my examina- tion convinced me that C. Forsteri could be only a hybrid; and * Manual of British Botany, 3rd edition. 152 Prof. Buckman on Cnicus tuberosus. this I stated in an account I sent to the ‘Phytologist,’ and which appeared in the September Number of that Journal for 1856.” For the present, then, I must content myself with having offered presumptive evidence of the non-specific character of what is, after all, a decidedly distinctive form; and as I have brought home some specimens and planted them in my botanical garden, where I shall also introduce the acaulis and acanthotdes, I shall look forward to the results of experiments with these with no little degree of interest, as in all probability, like so many other experiments which I have been enabled to perform in the same direction, these may serve still more to perplex the question “What is a species ?” Cirencester, July 1857. 153 Note on the Presence of the Fossil genus Isodonta, Buv., in the English Jurassic Rocks. By Joun Lycert, Esq. To James Buckman, Esq., Hon. Sec. to the Cotteswold Naturalists’ Club. Dear Sir, Will you have the goodness to communicate to the Club, at their next meeting, that we may claim the genus Isodonta, Buv. (Sowerbya, D’Orb.), as an addition to the fauna of the English Jura? The sole species hitherto described is the Isodonta Deshaysea, Buy., from the ferruginous Oolite of the Oxfordian beds of the Department of the Meuse. Recently, my good friend Mr. Leckenby presented me with a fine specimen of the so-called Cucullea triangularis, Phill., from the Cornbrash of Scarborough. The resemblance in the general aspect of this shell to the Iso- donta of Buvignier was at once apparent ; but it was only upon an inspection of specimens in the British Museum, collected by M. Tesson, that their identity with the Yorkshire shell became a conviction to my mind. Individual specimens vary in their elongation and in the degree of angularity at their infero-pos- terior extremity: little differences of this kind form the sole distinction between the British fossil and that of the Meuse, and the Normandic specimens in the Museum differ from each other at least to an equal extent. The Cucullea triangularis, Phill. Geol. York. i. tab. 3. fig. 31, is from the Coralline Oolite of Malton; it is somewhat less elongated than my Cornbrash specimen, and agrees more nearly with the figures of Buvignier, ‘Paléont. de la Meuse,’ Atlas, pl. 10. figs. 30-35, except that the figure of Phillips is somewhat more inequilateral from the shortness of the posterior slope: in the Cornbrash specimen, as in those from Normandy and from the Meuse, this feature is less conspicuous; but there can be no doubt that the anterior side is always somewhat more produced than the other ; the surface is smooth, but with two distant and strongly-marked folds of growth. The very tumid figure and incurved umbones are the external characters whereby it may be distinguished from Tancredia; the test is likewise thicker than in the latter genus. At present it does not seem that the Cornbrash shell can be separated as a species either from that of the Yorkshire Coralline Oolite, from the Normandic specimens, or from those 154 Mr. J. Lycett on the Fossil genus Isodonta. figured by Buvignier from the Department of the Meuse ; but ‘tis desirable that additional British examples of this rare form should be examined. I need hardly suggest to you the expe- diency of making a rigorous search in the Cornbrash and the Kelloway rock of the vicinity of Cirencester ; and believe me to remain, dear Sir, Yours, &c., Joun Lycert. Minchinhampton, October 19, 1857. 155 On sume Sections of the Upper Lias recently exposed at Nails- worth, Gloucestershire. By Joan Lycerrt, Esq. Reap 21st Jury 1858. So few opportunities are afforded for examining the Upper Lias of the Cotteswolds, so small are the artificial exposures of the stage occasionally made, so limited their extent and depth, that its fossils are almost unknown, and even the thickness of the stage has been very variously estimated. During the author’s experience of more than twenty years, the Upper Lias has only been known to him by small sections in clay-beds used for brick- making, and these are usually quite destitute of fossils; some cuttings, therefore, recently made, which exposed the entire thickness of the stage and many of its fossils, have induced him to prepare the present brief notice. The only authorities for the Upper Lias of the district are— ‘Outlines of the Geology of England’ by Conybeare and Phillips, 1822; ‘Outline of the Geology of the Neighbourhood of Chel- tenham,’ by Sir R. I. Murchison, 1834; the enlarged edition of the latter work by J. Buckman and H. E. Strickland, 1845 ; ‘Memoirs of the Geological Survey of Great Britain ;’ ‘The Geology of the Country around Cheltenham,’ by E. Hull, Esq., 1857. In the first of these works the Upper Lias is only dis- tinguished from the other membérs of the same formation by a useful section given at page 252, exhibiting the succession in the beds upon the western slope of the Cotteswolds at Painswick Hill, by the late Mr. Halifax of Standish ; but their thickness is not given. ! VOL. II. ° 566 Mr. J. Lycett on the Upper Lias of Gloucestershire. The following is the section, to which figures are here added, to mark the superior divisions :— )Gavvevaves a | OYo) ia oe eI RERC REMERON Coo cicero oc 1 Very micaceous sand ......-.0.eeeesceceecevene 2 Sand, with beds of unctuous, slaty, bluish clay ...... 3 Blue clay swith) septariais cic csi se «laieiaj ls «jel» lew ssieels 4 Thin beds of grey Lias-like marlstone.........-....+. 5 Lenticular balls of indurated marl with Ammonites and parts Of Fishes»... 0... sece cscs ee er nec ce ceeeerceen 6 Marly sandstone, a yellowish-brown sandstone, spangled with mica, blue at the heart, abounding with large Belemnites,| Peeters, &c.schaiks . Maldk bite bis HMA ls Sins