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TYPE AMMONITES VI

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There are two kinds of people in the world — those who pioneer and those who plod. The plodders always attack the pioneers

Henry Ford

'Today and Tomorrow.' 1926. p. 2

3.

TYPE AMMONITES-VI

BY

S. S. BUCKMAN

With contributions, photographs and/or MS., from

F. A. Bather, d.sc, f.r.s., C. C. Gaddum,

F. H. Michael, Prof. S. Henshaw, H. G. Herring,

B. Thompson, f.g.s., A. E. Trueman, d.sc,

J. W. Tutcher, D. M. Williams, b.sc.

Vol. VI

Pages I — 6i, with Text-iigures 1-3 Plates 192

Published by the Author

Sold by WHELDON & WESLEY, Ltd.

2, 3 & 4, ARTHUR STREET, NEW OXFORD STREET, LONDON, W.C. 2

1925— 1927

CONTENTS

Vol. VI

Page

Terminology 5

Systematic 7

Chronological 49

Acknowledgment 5^

Publication Details 52

Synopsis 52

^denda, Corrigenda 52

('Plates (192)

Mndex • • 53

Made and prinud in Qreat 'Britain by

NORMAN, SAWYER AND CO., LTD., ST. GEORGE's HALL

CPELTENHAM

Terminology

Dr. F. A. Bather, F.R.S., of the British Museum (Nat. History) writes : " I have been reading [Type Amm., Vol. V] with deep interest. But I wish you would make it clearer that a genotype or lectogenotype is a species, not a specimen. I really think that this is of some importance. There are passages and especially legends to plates which tend to confusion."

Strictly speaking. Dr. Bather is perfectly correct — the genotype is a species ; but as there always can be differences of opinion as to whether certain specimens belong to a species or should be separated, the actual specimen to which the generic name was first applied becomes, when it is positively known as such specimen, the only example about whose identity there can be no dispute. Such original specimen is thus the actual type of reference for determining the characters of the genus. So I have always quite deliberately pinned the genotype species down to the basis of one original specimen. When authors have given a generic name to species without definite fixing on one, I have chosen first one species and then one specimen — a lectogenotype, as Dr. Bather writes, or a genolectotype, as I have written, to be the one definite standard. Thus for the genotype or the genolectotype species there is one and only one actual standard of reference. I have used the term genotype for short instead of writing ' the ultimate standard of refer- ence whereon the genotype species rests, and by which it has to be determined.'

The generic name does not follow the cited species, it follows the cited standard specimen : it is the identity of the standard specimen which rules the genotype species, not the name of the cited species which rules the identity of the genotype standard. Oftentimes the attributing of the genotype standard to a given species may be incorrect.

For example, I have given the generic name Gigantites to a specimen supposed to be conspecific with Sowerby's Ammonites giganteus (T.A. Ill, CCLVI). This identity may be wrong. If so, the generic name Gigantites remains fixed on my giganteus, whatever that may be ; it does not pass over to Sowerby's Ammonite's giganteus, however often the genotype species of Gigantites may have been cited as being Gigantites giganteus, J. Sowerby sp. I have protected my specimen by definitely placing the word ' Genotype ' in its legend. But, had I not done so, I hold that it should be taken as the ' genotype standard of reference.'

It is, therefore, in my opinion, imperative that in giving a new generic name, the author should not merely cite a given species by name, but should cite one definite specimen of that species for the type of his genus ; because the species which he selects may contain many specimens : in his opinion these may be conspecific, but it does not follow that future observers will agree in that view. Then there is trouble as to which form is to be selected : all this is avoided by being

TYPE AMMONITES— VI Feb.

definite as to one example. Whatever be the species of that one example is then always the genotype species, while the one example always remains the genotype standard of reference.

The foregoing was submitted to Dr. Bather, who very kindly sent the following remarks, which he has given me permission to publish :

On Genotypes, by Dr. F. A. Bather. As C. Schuchert says, in his introduction to the Catalogue of Type specimens of Fossils in the U.S. National Museum, a genotype is a species, not a specimen. To this statement " strictly speaking " you agree.

This being admitted, certain difficulties may arise, as you have foreseen, and as is matter of frequent experience. They are generally due to a misreading of the genotype through failure to study its holotype. The way you have chosen to prevent those difficulties is, in my opinion, illogical. On such matters I am constantly consulted, and the following is the advice which I invariably give.

In establishing a new genus an author should fix on one species as the genotype (or genoholotype) . The standard of that genotype is the holotype of the species. Therefore, if there be no holotype, it is his business to select one (lectotype). If possible, he should become personally acquainted with the syntypes, so that he will select an appropriate specimen. In any case, it is to be presumed that he does not venture to make any species the type of a new genus, unless he is familiar with its holotype, since it is by that specimen in the last resort that the genus must be judged. The holotype of the geno- type is the ultimate standard of reference.

Now, if the author is prevented by inevitable circumstance or by laziness from doing this work, and if he has to leave others to do it for him — that is to say, if he thinks himself obliged to make a new genus without knowledge of its type-species, because such a course is suggested by a specimen or specimens that he refers to that species, then the follow- ing is the course of action to follow. He should select one of those specimens and say : " If it be found that the genotype or type-species is not what I imagine it to be, i.e., is not conspecific with the specimen before me, then it is to be understood that my new genus is to be interpreted by this specimen, which will be the holotype of, or will fall into, a new species, and that species will be the genotype of my genus."

The preceding, you will see, has in the end the same practical result as your action, but is not open to the same criticism. It is, in my opinion, preferable because it does not encourage slovenly work, but urges on the author the need, for studying the actual type-material.

I can see no radical difference between Dr. Bather's use of the word genotype and mine, except this : that I use the word I' genotype " quite short where it should be said ' the one standard of reference for the genotype species.' We are both agreed that it comes down ultimately to one specimen. But Dr. Bather has started another hare altogether — that is, the method to be used in choosing a genolectotype out of various examples of a species. He says, in effect, that if an author writes Ab, wherein A is a new generic name, then the holotype of b automatically becomes the genotype standard of reference for the generic name A. I dissent. I say that if Ab represents a multitude of species, as it really did in uncritical days, then all the species of these forms which are known as b prior to the giving of the name A are really genosyntypes,

1926 SYSTEMATIC

and that if the author has not, by some means, made indication of selection, then a subsequent author has the right to choose a geno- lectotype out of those genosyntypes : to be precise, he should pin down one definite specimen as the standard of reference. For the holotype of Ab may never have been fixed ; it may be obvious from the author's diagnosis of his genus that he has never seen the original material, so that it is equally plain that the author is giving his generic name to species erroneously identified with Ab. Or, again, if there be a holotype of Ab, it may be so poor a specimen that no one would wish to have it as a genotype standard, because it would give rise to so much diversity of opinion that the' unfortunate A would be hunted from pillar to post, being found one day with one series of characters, and placed with one set of associate species ; another day with quite other sets.

This case is different from that considered in my first notes (p. 5 above), which is concerned with an author giving a generic name to three or four distinct species, out of which he has not selected one species to be a genotype. Here a subsequent writer is free to choose a geno- lectotype species out of these genosyntypes ; but, again, in the geno- lectotype species there may be several specimens, and, to avoid confusion, the method of choosing one of these as the genolectotype standard would be followed as noted above. Thus there would be one rule only — whether there be several species Ab, Ac, Ad, or only a series of specimens passing under one name Ab, there is freedom to choose, first one species and then one sp)ecunen of that species, as the genolectotype standard.

Dr. Bather's dictum that an author should always consult the holotype before giving a name is a counsel of perfection ; but it is scarcely practicable. Types are scattered all over the globe. Lack of health and lack of means, two interdependent afflictions of many scientific men, would effectually bar the necessary travelling.

For just such reason I hold that the material which an author has under his hand, especially if he has used it in description or illustration, even without having actually mentioned it as genotypical, should take precedence. The genotype should go with what the author has seen, and not with what he may not have seen. If the author's b turns out to be a prior-named or a post-named c, then the genotype follows c, not b ; but the author's specimen of c may not be the holotype of c : it may be a plesiotype, or it may be a paratype.

Therefore, with much regret, I differ from Dr. Bather's statement that ' the holotype of the genotype is the ultimate standard of reference.' In my opinion, the genotype standard of reference is by no means necessarily the holotype of the genotype.

If only students will in future be precise in stating which specimen is to be taken as the genotype standard of reference, much trouble would be saved. Unfortunately, such technical details are not impressed on them by their teachers, because the teachers themselves lack the necessary training. Editors, however, could do much by insisting that such details be given.

Systematic Suture-line : For the distinction of genera the relative length and development of the lobes of the suture-line is found to be of prime

TYPE AMMONITES— VI Feb.

importance. Hitherto where this has been recorded in the legend at the foot of the plate, it has been placed in the following full form, SI. EL — , Li — , L2 — , per cent, of whorl-breadth or more concisely EL — , Li — , L2 — of — (whorl-breadth understood). Yet it is advisable, for the saving of space, to record for the future in another manner, congruous with that used for giving proportions. Thus the record will be made in four consecutive items : ist. The breadth of the whorl in millimetres, next the length of EL in so much per cent, of such breadth, next that of Li, lastly that of L2. Thus a set of figures preceded by SI. and reading SI. 20, 45, 54, 23 will indicate as follows : The breadth (or height) of the whorl is 20 millimetres, the external lobe (EL) is in length 45 per cent, of that whorl-breadth, the first lateral lobe (Li) is 54 per cent, and the second lateral lobe (L2) is 23 per cent, of the 20 mm. Beginning with this number (Part 56) the records will be so made. When an item cannot be given, a — will be placed in its position. More and more attention to these suture-line details should be urged on those who desire to identify species of Ammonoids.

The whorl-breadth is given in the same way as it is taken in regard to proportions, because where the suture-line is painted in on the specimen and the figure of the specimen is reproduced with such line in place, that is the easiest method for measurement. But when a suture-line is traced off, and is reproduced with the full curve of a gibbous side extended to a straight line, the necessary allowance must be made, for the difference in length of a base-line from a straightened-out curve beyond a base-line of mere length without the curve. The first base-line should be reduced to the amount of the second, a feat easily accom- plished by means of any of the little wheel-measuring instruments.

Other proportions may sometimes require to be given, and should be provided for — the Auxiliary lobes and the Internal lobe : they may be marked as A', A" and so on and I, followed by their proportionate figures.

A further proportion is important in the cases of Stepheocerates, Perisphinctids and Hke forms — the length of what is known as the retracted inner portion, or the suspensive lobe, or, as the Germans concisely call it, the Nahtlobus, that is the seam lobe or the lobe by the whorl- junction. Nahtlobe seems good to adopt, with the symbol N. The proportion of this lobe when given will come as an item marked by a preceding N.

The length of the Nahtlobe is the length of the whole series of lobes which run down the inner part of the whorl inside Li. See, for instance, Cymatosphindes cymatophorus, CDLb. The length is measured from the bottom of the lateral saddle Si, which, in fig. i of the plate referred to, just touches the bottom line of the figure. From that point a line is drawn towards the inner edge to run parallel with the guide-line. Or the same result can be obtained in another way : — measure from base of ES to the guide-line and then add any overplus below the guide-line or deduct any minus quantity short of it. In the figure referred to there is an overplus of not quite 6 mm., the full length of N is 52 mm. The length of base-hne is 49 mm., so the value of N reads as N 103.

A good instance of the necessity of attending to the proportions of suture-lines occurs in this work. Three species of Wheatleyites were

1926

SYSTEMATIC

named, in one of which, W. redudus, the decrease in length of lobe was attributed to age (phj-logerontism). Subsequently a more aged species of Wheatleyites was found, W. rarescens, which showed that the length of lobe increased. About the same time a less advanced form, congruous in suture-line with W. redudus, was discovered, to be named Shotoverites pringlei. Obviously it is necessary to change Wheatleyites redudtts to Shotoverites reductus (see below, p. 15). Table I, following, shows how 4 specimens (3 species) of Wheatleyites agree in general proportions of suture-line and how the two species of Shotoverites stand together distinct from them.

Table I— Wheatleyites & Shotoverites (Suture line, SI.) Wheatleyites tricostulatus, CCCLXV 71, — , 60, 39-5

W. opulentus, CCCLXXXIIIa 79, 56 ? 64, 31 ?

W. „ , CCCLXXXIIlB 26-5, 66, 60, 38

W. rarescens, DLXIa, 45, 69, 71, 45

Shotoverites pringlei, DLXII 48, 40, 46, 22

S. redudus, CCCLXXXIV 89, 39-5, 37 [43 ?] 24

The length of Li in S. redudus seems to have been understated : tested on the plate it gives 43 p)er cent.

A similar instance of the necessity of taking the proportions of suture-lines occurs in Dr. Neaverson's lately-published work (Amm. Kimm. 1925). He makes a new genus Sphindoceras with genotype S. crassum (li, i). This is a most remarkably longilobate species. With it he associates 5. distans (iv, 3) of which he only gives suture-lines of young stage — practically useless. But I have before me, from a neighbouring brickyard, Mus. Pract. Geol. Collection, an adult specimen of his species : it gives a lobation about 30 per cent, less than Sphinc- toceras. Another genus Dr. Neaverson names Allovirgatites, genotype A. woodwardi (in, i). He does not give the suture-lines at all clearly of this or of other species of his genus, except A. versicostatus (p. 36, fig. B. 6), though, obviously, the specimens show the suture-lines clearly. But the deficiency can be supplied by examples collected by the Geological Survey and myself from various brickyards in the Oxford neighbourhood. The suture-line proportions are given in Table H : —

Table H — Sphinxtoceras & Allovirgatites (Suture-lines) Sphindoceras crassum, 11, i, S. distans, M.P.G. Coll. Allovirgatites woodwardi, in, i

S.B. Coll. „ versicostatus. Fig. B. 6, p. 36,

, HI, 4 tutcheri, M.P.G. CoU.

In these suture-line proportions Sphindoceras crassum stands out quite alone, as an exceptionally longilobate form, surpassing even Wheatleyites (see Table I, above), which has quite a good record in this matter. Then all the examples of Allovirgatites yield proportions of about 50 per cent, for EL and Li, both lobes being far shorter than those of Sphindoceras crassum. The lobe-line of Neaverson's Sphinc-

38,	82,	76.	47
47.	52,	53.	34
21,	— ,	55.	34
29.	52.	52,	34
18,	53.	45.	30
19-5.	50,	50.	26
'I9.	47.	47.	26
126,	45,	49.	30

10

TYPE AMMONITES— VI Feb.

toceras distans shows much disagreement with that of his S. crassum, but full agreement with those of species of Allovirgatites. On the first ground the conclusion is reached that, whatever else it may be, Dr. Neaverson's distans is not a Sphinctoceras, and, on the second, that unless there is some character other than suture-line to weigh heavily in the balance, it belongs to the genus Allovirgatites.

The slight differences in the proportions of Allovirgatites are easily accounted for. There are, first, indistinctness in the illustrations and, secondly, differences in the base-line. Thus the base-line in a com- pressed-whorled species like A. tutcheri departs little from the base-line which would be yielded on a curve ; but the base-line of a gibbous-sided species like A. woodwardi is much shorter than would be a base-Una measured over the gibbous curve. Therefore a base-line of 26 mm. in A. tutcheri is relatively longer than is a base-line of 26 rnm. in A. wood- wardi. Therefore the proportions of the lobes in A. tutcheri, since they are reckoned in regard to a relatively longer base-Une, would come out shorter than those of A. woodwardi.

These figures of sutural proportions are a good illustration of their reliability in the detection of generic affinity. They show, also, how dangerous it is to assign a species to a given genus without taking note of its suture-line. The eye alone is not to be trusted — compass-measure- ment is essential.

Nomen nudum : This term is used sometimes quite incorrectly. Mr. C. H. Crickmay speaks (Proc. California Acad. Sci., (4) xiv (3), 1925, p. 77) of " a vast assemblage of nomina nuda — chiefly names applied with no, or with incomplete, description by Alpheus Hyatt." Dr. L. F. Spath (Yorksh. Amm. ; Naturalist, 1925, 359, footnote i) remarks " Simpson's names must be considered to be nomina nuda as much as Hyatt's unfigured Liassic species recently referred to by Crickmay." Dr. Spath's dictum is wholly incorrect so far as Simpson's names are concerned, and Mr. Crickmay's is mainly wrong. Only those names can be called nude which have no covering description of any kind. So long as a name has a covering description, however insufficient it may be, the name cannot be called naked. The covering description may be as exiguous as the fig-leaf aprons credited to Adam and Eve, or as the bathing-drawers which were considered right in the days of my early manhood, but are condemned by the present decadent age ; yet so long as there is a covering, there is not nudity. Hyatt's and Simpson's names, when covered by any description, are not nomina nuda, any more than are the names of Linne, Bruguiere and others. In natural history a description alone is sufficient to establish priority in the naming of a species. Ammonite workers are not a law to them- selves : they must conform to the laws of natural history nomenclature. Insufficiency of description cannot be urged as ground for the rejection of a name — insufficiency is a relative term, and would lead to endless argument. It might be urged that no description is ever sufficient.

Of course, figures are desirable. It was to supply the lack of figures which obtained so widely in regard to Yorkshire Ammonites, and were really a stumbling block in the way of their proper study, that this work was commenced. It can, at least, claim to have been successful in figuring a large number of species, which before were only known from descriptions. It can claim to have placed the majority of Yorkshire

1926 SYSTEMATIC ii

Liassic species on the surer footing of pictorial representation ; but there is still much to be done. Rejections of names because their types lack illustration is easy, but it is not correct work. Mr. Crickmay took a satisfactory course, that of hunting out Hyatt's types and illustrating them. It is to be hoped that he will continue that good work.

However, the possession of a figure of a species does not necessarily end all troubles. A bad figure may cause more worry than no figure at all. Figures may be synthetographs, drawn purposely from more than one specimen, or depicted by oversight of the artist from more than one example. This is the case, presumably, with Young & Bird's figures of Ammonites redcarensis, which now has to be considered.

A. redcarensis: Young & Bird's original description (1822, p. 248) is as follows : — " No. 13, PI. XIV, has also [like a maculatus] sharp ribs, and has a sharp keel running along the back. It occurs in the lowest shale at Robin Hood's Bay, and other places. A large shell, generally found imjjerfect, but apparently of the same species, occurs in the Redcar rocks. The a. Bucklandi of Sowerby, Tab. 130, seems to be a cast of this species. We would prefer naming it A. Redcarensis."

The figure then given by Young & Bird (photographic copy repro- duced T.A. DCVIII, i) shows in its south-west corner a crinkly line on the jjeriphery. Such crinkly line would not represent the carina of a species like Am. bucklandi or obiustis ; rather, it seems to have been drawn from the crinkly edge shown by ribs on the further side of a ventrally-furrowed specimen — the space in the south and south-west of the figure, between the crinkly line and the line bordering the periphery, representing the ventral furrow.

In the second edition (1828, p. 258) the description is very consider- ably altered : — " No. 10, PI. XIV, from the same beds [as A. Bucklandi in the lowest shale at Redcar, and in Robin Hood's Bay] is obviously a different species [from A. Bucklandi], which we have named A. Redcar- ensis. It is a flatter shell, with the aperture more oblong ; and an imperfect keel, where the ribs, which are bent forward, regularly meet in pairs, at a sharp angle, in the form of arrow-heads. It nearly corresponds with Sowerby's A. Turneri, Tab. 452."

The figure which is given in this edition differs considerably from that of the first. The periphery has been altered from a crinkly line to a uniform curve, and the whole appearance is that of a carinate- bisulcate like Am. obtusus.

Therefore in the first edition the description is that of a carinate- bisulcate ; but the figure is, in part, that of a ventrally sulcate ; in the second edition the description, all except the last sentence, is that of a ventrally sulcate without any doubt, but the figure is that of a carinate- bisulcate. It is a remarkable muddle.

What seems to have hapf)ened is this. Young gave the name redcarensis to a ventrally-sulcate specimen like that sent from Whitby Museum (No. 314) as the original of the species. Bird drew the outline of such a shell, but he filled in other details, partly, at any rate, from a carinate-bisulcate, in error. Then Young, not noticing the substitution, drew up his description from the shell which Bird placed before him.

In the second edition author and artist, or the two authors, seem to have been again at variance. Young gave a description which would fit a ventrally sulcate, Bird amended his figure so as to depict a carinate- bisulcate.

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TYPE AMMONITES— VI Feb.

This theory of substitution, with consequent confusion, is not in the least unreasonable, for it is fully borne out by what Bird did in regard to A . clevelandicus and A . elegans, as already noticed in this work, Vol. II, No. 109.

The figure in the first edition is, therefore, a synthetograph — the specimens which have been used in the drawing of it become syntypes of the species : they are presumed to be the ventrally sulcate, a Schlotheimian and the carinate-bisulcate, an Asterocerate — which should be chosen as lectotype ? The evidence of subsequent authors who have had opportunity to study Young & Bird's material may be given.

Simpson, M., 1843, A Monograph of the Ammonites of the York- shire Lias.

" [P- 55] IV. With a dorsal furrow only.

" 107. A. Redcarensis, Y. & B.

" Depressed ; volutions 5 or 6, inner ones J concealed, outer whorl rather more than | the diameter ; radii prominent, diverging, straight along the sides of the whorl, then suddenly bend towards the aperture near the back, where they are terminated by a narrow, smooth space or furrow ; aperture triangular, or sub-quadrate ; diameter 3 inches.

" The radii proceed from the inner margin of the whorls, and have the appearance of coarse plaits ; the prominent angles on the back, and the absence of a keel, render this a highly characteristic species ; the sides of the whorls are slightly convex, and the inner edge quickly rounded. From the appearance of the matrix I judge it to be from the ironstone series ; I have a fragment of this species from the oolite of Filey : the flat space on the back is very narrow, and the radii are much more numerous and slender than in the lias specimens."

Simpson, M. The Fossils of the Yorkshire Lias, 1855, pp. 100, loi.

" [P. 100] IV. With a dorsal furrow only.

" 187. A. REDCARENSIS, Y. & B — Volutions 5 or 6, [p. loi] inner ones ^ concealed, outer whorl rather more than J the diameter ; radii prominent, diverging, straight along the sides of the whorl, then suddenly bend towards the aperture near the back, where they are terminated by a narrow smooth space or furrow ; aperture triangular, or sub- quadrate ; diameter 3 inches."

" The radii proceed from the inner margin of the whorls, and have the appearance of coarse plaits ; the prominent angles on the back, and the absence of a keel, render this a highly characteristic species ; the sides of the whorls are slightly convex, and the inner edge quickly rounded."

" I have now got Young's original Redcar specimen, and I see no difference between it and A. anguliferus. Ph. It is a very variable species. In some the outer whorl is narrower, and the ribs on the back are so depressed as to shew the flat space as a keel ; in others they are so prominent as to form a narrow channel. Some specimens are much inflated, whilst others are much depressed. Mr. Bird's figure is entirely erroneous, and must be intended to represent A. obtusus. Sow.

" I have a fragment of a specimen, twice as thick as some, and with coarse and irregular radii. I leave it at present as a variety. — L.L."

1926 SYSTEMATIC 13

Oppel, A., Die Juraformation, 1856, pp. 75, 76, writes : " In Yorkshire erhielt ich Amm. angulatus in mehreren Exemplaren. In den dortigen Sammlungen liegt er entweder mit dem Phillip'schen Namen : Amm. anguliferus , oder nach Young und Bird : Amm. Redcar- ensis bezeichnet. Letzteres mag auf Irrthum beruhen, denn die Young'sche Angabe (pag. 248), dass Amm. Redcarensis einen scharfen kiel trage, stimmt mit der aussern Form des Amm. angulatus nicht iiberein."

Blake, J. F., (Cephalopoda, in Tate & Blake, The Yorkshire Lias, 1876, p. 271), says of Aegoceras angulatum Schlotheim : — " This was first recognised by Young and Bird [as A. Redcarensis], but the figure given is erroneous. It was identified by Oppel as belonging to the previously described species of Schlotheim. There are two varieties : (a) most involute, the outer whorl being more than J the diameter — the common Redcar fossil ; {&) less involute, with outer whorl J the diameter, occurring chiefly in the southern area. The largest known is about 3 inches in diameter."

The types of Young & Bird's two editions came to the Whitby Museum, so Martin Simpson, the Curator, was in the best position to know the sf)ecimens. He is quite f)ositive that Am. redcarensis is a sulcate. The example now figured (T.A. DCVIII) is presumably that which Simpson called " Young's original Redcar specimen " — Simpson's measurements were often only approximate. If so, it will be best to accept the sulcate specimen and to call it the lectotype. Its locality would then be Redcar : Young & Bird seem to have been in the same confusion about the locality as about the specimen.

Pallasiceras, Spath MS. cit. by Lamplugh, Kitchin & Pringle (Concealed Mesozoic Rocks in Kent ; Mem. Geol. Surv., 1923, p. 222) : " Pallasiceras ' pallasianum ' " and footnote 2 " Ammonites pallasianus as hitherto understood by British geologists. Dr. L. F. Spath permits us to say that, in a work now in the press (to be published by the Geological Survey of India), he proposes for this group the generic name Pallasiceras : genotype Ammonites rotundus J. Sowerby, ' Mineral Conchology,' vol. iii, pi. 293, fig. 3, 1821. The genus does not include A. pallasianus of d'Orbigny."

This is the first published mention : it fixes the genotype definitely on Sowerby's specimen. Unfortunately, this is only a body-chamber fragment, much worn, and giving Httle indication of suture-hne. This holotype is figured in T. A. DXC, 1925. Topotypes show that the suture-line is short-lobed, and that the inner whorls are multicostate, somewhat of virgatite pattern, not dissimilar from those of young Lydistratites (T.A. DCVb). So far as can be at present ascertained, the difference of Pallasiceras from the prior-named Lydistratites is that in Pallasiceras the species remain comparatively small and the suture-line comparatively simple with short lobes. Pallasiceras would appear to be the phaulomorph of Lydistratites, having about the same relation to that as Otoites has to Emileia.

Pallasiceras rotundum occurs in the Nodule Bed of the so-called Kimmeridge Clay of Chapmans Pool, Isle of Purbeck, Dorset (T.A. DXC) — this Nodule Bed being about fifteen feet above the shore, and

14

TYPE AMMONITES— VI Feb.

quite different in date from the Kimmeridge Clay Nodule Bed of Oxfordshire. P. lydianites (T.A. DCIV) is from the Lower Portland Pebble Bed, Hartwell, near Aylesbury, Bucks.

The forms figured by Dr. Neaverson (Amm. Upper Kimm. ; Geol. Dept., University of Liverpool, 1925) as Pallasiceras, from Chapmans Pool are, by the suture-lines which he has given, Lydistratites. Of those for which he has not given suture-lines it is impossible to say whether they are Pallasiceras or Lydistratites. His Pallasiceras ultimuni from Hartwell, near Aylesbury, has neither the suture-Hne of Pallasiceras nor of Lydistratites, and possibly it has no relation to either genus. No evidence of any connection is given.

Lydistratites, S. Buckman, 1922, Genotype, L. lyditicus, T.A. IV, CCCLHIa. a serpenticone biphcate developed from a virgatite. The inner whorls of the holotype show traces of approximate parvicostation. The suture-line is more longilobate than that of Pallasiceras and Li, L2, increase in length with age ; ES also increases, but not so rapidly.

Lydistratites lyditicus has been figured in T.A. (CCCLIHa-d) from the Pebble Bed at the base of the Portland-Stone series of Long Crendon, Bucks, from [Upper Lydite Bed of Swindon, Wilts], from Nodule Bed of Chapmans Pool, Isle of Purbeck, Dorset. Forms figured by Dr. Neaverson (Amm. Kimm. 1925), with suture-line, as Pallasiceras from Chapmans Pool belong to Lydistratites, see Pallasiceras (p. 13) . Lydistra- tites biformis and L. cunctator are figured (T.A. DCV, DCVI) from Lydite Pebble Bed of Hartwell, near Aylesbury, Bucks.

HoLCOSPHiNCTES, Neaverson, (Zones of the Kimmeridgian ; Geol. Mag. Ixi, 1924, p. 149). " Holcosphinctes pallasioides gen. et sp. nov. (= Am. biplex H. B. Woodward, Middle and Upper Oolites : Metn. Geol. Surv., p. 156, fig. 72, 1895), of which specimen No. 30721 Coll. Geol. Surv. is genotype and holotype."

The genus differs from Lydistratites and Pallasiceras in that its primary ribs are short, and the secondary ribs commence well on the lateral area, while in the other genera the primary ribs extend nearly to the peripheral border before bifurcating. The suture-line also differs from Pallasiceras in being more lobate and from Lydistratites in EL < Li instead of EL > Li.

H. pallasioides has been figured (T.A. DLXIX) from the Crendon (Hartwell) Clay of Long Crendon, Bucks. Dr. Neaverson (Amm. Kimm., 1925) depicts H. pallasioides and H. flexicostatus (PI. in, 5, 6) from Hartwell Clay, of Hartwell, near Aylesbury, Bucks.

Paravirgatites, S. Buckman, 1922, T.A., IV, CCCVIII, Genotype P. paravirgatus. Somewhat like Pallasiceras in ribbing, only that the furcation-point is much nearer the umbilical edge. The venter is well rounded off, not flattened, as in Pallasiceras. The suture-line is short- lobed, and in this respect agrees with topotypes of Pallasiceras from the Nodule Bed of Cliapmans Pool.

P. paravirgatus (PI. CCCVIIIa) is from the coarse grit of the Shotover Grit Sands of Shotover, near Oxford ; that of PI. CCCVIIIb is, by matrix, from the Cemetery Beds of Swindon, Wiltshire; P. desider- atus is from Long Crendon, Bucks, among sands (Hudleston label and Collection), that is, from Thame Sands ; P. infrequens (PL DCIII) was obtained in place from the hard layers of sandrock at the top of the Thame Sands of Thame, Oxfordshire.

1926 SYSTEMATIC 15

The species figured by Dr. Neaverson as Paravirgatites kimmeridgensis (Amm. Kimm. 1925) is unlikely to be a Paravirgatites : the ribs are much too straight and regular, as may be seen by comparison with P. paravirgatus, T.A. CCCVIIIb ; but as Dr. Neaverson has given no suture-line, the right genus cannot yet be determined.

Shotoverites, S. Buckman, 1925, T.A. DLXII. Like Wheatleyiies, but with decidedly shorter lobes and with more distinct tricostulation in the magnicostate stage. Shotoverites rednctus should replace Wheatley- ites rednctus (CCCLXXXIV), whose date would probably be later than W heatleyites , namely pringlei, on the evidence of S. pringlei and its locality.

Kerberites. T.A. V, 1924, DXX, Genotype Kerberites kerberus. Heavy-ribbed, with, frequently, triplicate secondaries, whence the name, from the three-headed dog Kerberus. The whorl-section is obovate, that is, somewhat convergent. Specimens have been figured from [Chicksgrove, Tisbury], and from the Cockly Bed of Swindon, Wiltshire. Poor examples are known from Long Crendon (North-West pit), Bucks, which, by their matrix and the extent of quarry opened, come from about the Rubbly Limestone Bed, Behemothan 7, (T.A. IV, 1922, 26). The matri.x shows that they cannot be lower, and the extent of the quarry that they might only be a little higher.

The noticeable point about the example now figured, PI. DXXa, b, (T.A. VI, 1926), is the preservation, in the inner whorls, up to a diameter of about 35 mm., of the small and close-set costate or virgatite stage. Yet there seems to be no other difference, neither in suture-line nor in plotted proportions, from the holotype (T.A. V, 1924, DXX), which has well-costate inner whorls. Either the holotype has accelerated the oncoming of magnicostation — precedentive palingenesis, or the plesiotype has retarded it unduly — cunctative palingenesis.

The phenomenon of the plesiotype's inner whorls may justify two statements. First, that the magnicostate Gigantids are the descendants of multi-parvicostates — either of virgatites, in which secondary ribs are bundled into a primary, or of pectinates, in which the ribs are like those of a fine tooth-comb, only not always single, sometimes bifurcate. Second, that it is dangerous to make a distinct species, let alone a different genus, on account only of dissimilarity of the early stages, for such dissimilarity may be only the result of differential acceleration or retardation along a given line of development.

The phenomenon of the inner whorls of the holotype, as well as of the inner whorls of other Gigantids, teaches that the change over from parvicostation to magnicostation in such forms could be so rapid that the parvicostate stage was practically omitted from the recapitulation : as soon as ornament began to be formed, magnicostation started.

Lydistratites shows magnicostation arrived at after a virgatite stage ; Wheatleyiies exhibits magnicostation developed after a pectinate stage ; in these two cases the difference of inner whorls would justify differentia- tion into genera. Because the two forms of inner whorls are not sequent to one another ; they are parallel developments even when not strictly synchronous. Rapid acceleration of the magnicostate stage in species of either of these two genera would yield inner whorls looking very

l6 ■ TYPE AMMONITES— VI Feb.

1926

unlike the prior virgatite or the pectinate respectively ; but as the magnicostate character is sequent to the respective parvicostate stages, it would not justify generic separation of magnicostates from parvi- costates.

KosMOCERATES. There has now been figured a sufficient number of genera, which have hitherto come under the designation of Kosmo- ceratidae, to make possible analyses of their characters in tabular form. This is by far the most concise method of showing how genera differ one from another, and what progression or regression they make in the matter of development. This method is preferable to that of describing single genera promiscuously ; but its disadvantage is that time must elapse before a sufficient number of genera have been illustrated.

The subsequent Tables III — V give analyses under the following headings : —

Shape of Venter — runcinate, or subsulcate, or sulcate : these are the progressive stages — towards greater heterogeneity ; then follow reverse stages — to homogeneity or less heterogeneity — subsulcate, runcinate, rounded.

Ornament of Venter — progressive — ribs, tubercles on the end of single ribs, tubercles into which there flow 2, 3, 4 or possibly more secondary ribs ; then the reverse, 4, 3, 2, i, to none, and finally to smoothness — loss of ribs.

Ornament of lateral area — progressive — costate, one median row of tubercles, two rows of tubercles, one being median and the other inner marginal (umbilical) ; then the reverse — back to one row of tubercles after having had two rows, costate merely, after loss of all tubercles, and a singular development in a limited series — back to smoothness, but retaining and even enlarging the inner marginal tubercles: this is a singular phenomenon, because in most cases the rule is ' the last character to come is the first to go ' : this departs from that rule.

There are other characters which might be used in analyses : strength of primary ribs, number of secondary ribs to primary- — from one to perhaps seven and back again ; and all the various details of suture- line — relative length of EL, Li, L2, characters of, say, Li from the simple trefoil or clover-leaf pattern to the long, elaborate, thin-stemmed cruciform. All such characters have to be utilized in the naming and distinguishing of genera, but their analysis is not regarded as necessary now.

However, in the analyses of the characters which are made it will be obvious that there is often a difficulty in saying whether a given character is in a pre- or a post-condition : for instance, a runcinate venter is obviously post-round ; but is it pre-sulcate or post-sulcate ? Have the members of a given genus, which show a runcinate venter, been through a sulcate stage and returned to the runcinate ? Or is a runcinate venter the highest development to which they reached, so that the next move is back, to rounded again ?

Ontogenetic studies may sometimes answer these questions ; but not always — for there is ever the possibility of a stage being skipped. Then runcinate pre-sulcate and runcinate post-sulcate merge one into the other.

1926

April

SYSTEMATIC

17

Table III — Morphic Development — Venter (shape)

	c	■A ■7,	X	■■J =f ■7.	J •r. Si II ■■J — ' c	-3 c 3 3
Kosmoceratan Kuklokosmokeras					X X	X
Bikosmokeras				X
			X X X	?
			?	? X X
Katakosmokeras			X
Zugokosmokeras Hopli kosmokeras Spinikosmokeras Gulielmites
		? X
X	X	X
Anakosmokeras	X			X
Reineckeian	X X ? X X X
Proplanulitan Sigaloceras Galilaeites	X
Galilaeanus					X
Galilaeiceras					X
Gulielmina Catasigaloceras Gulielmiceras					X
X				?
Toricellites		X	X	X
Gowericeras	X X X			X
Macrocephalitan Toricelliceras	X			X	X
Kepplerites Cerericeras			X
				X

i8

TYPE AMMONITES— VI

April

Table IV — Morphic Development — Venter (ornament)

Ages Genera	8 o	•c K to	Tuberculate (2, 3, or many costa;)	Tuberculate post 2, 3 or many costse)	-M 6	Smooth (post- tube rculatc or post-costate)
Kosmoceratan Kuklokosmokeras					X X X X
Bikosmokeras			2 2 4	3 2? I?
Lobokosmokeras
Kosmoceras
Katakosmokeras
Zugokosmokeras Hoplikosmokeras Spinikosmokeras Gulielmites
			2, I 3,2,1
		2,3.4?
X X X X X	X X	X
Anakosmokeras				X
Reineckeian
Proplanulitan Sigaloceras Galilaeites Galilaeanus Galilaeiceras Gulielmina	X
			?
Catasigaloceras Gulielmiceras	X X X X				X
X X X				?
Torricellites			X X
Gowericeras Macrocephalitan Toricelliceras
Kepplerites Cerericeras

1926

SYSTEMATIC

19

Table \' — Morphic Development — Lateral Area (ornament)

Ages C.enera	0 •T. 0	0 a „	a r. ct '■$ 1 ° 1"	■T. S 0 ^-^ ■2 0	0 ■r.	Smooth (inner tubercles retained)
Kosmoceratan Kuklokosmokeras				? X X X	X X X X X X X
Bikosmokeras
Lobokosmokeras			? ? X
Kosmoceras
Katakosmokeras
Zugokosmokeras Hoplikosmokeras Spinikosmokeras Gulielmites
		X X X X	X X X X X X X X
		X
Anakosmokeras
Reineckeian	X
Proplanulitan Sigaloceras Galilaeites
Galilaeanus			? X ' X
Galilaeiceras
Gulielmina Catasigaloceras Gulielmiceras		X
		X X X p ?		X
Toricellites			X X X X X	X X X X
Gowericeras
Macrocephalitan Toricelliceras Kepplerites Cerericeras	X	X

20

TYPE AMMONITES— VI April

1926

The genera in the Tables III — V are placed approximately in chronological order, the latest above, the earliest below ; but in those cases where several genera belong to the same date, their individual order has no chronological signification. Of the others, the exact sequence is not known for certain in one or two cases, like that of Kosmoceras : its date may be a httle later, less likely any earlier. Otherwise, on the whole, the evidence for the chronology of the genera is fairly clear. They are distributed among South English strata in the following manner : —

Kosmoceratan North Oxford Clays

Christian Malford and Calvert Beds

Reineckeian Almost no deposit

Proplanulitan • • . • • • • Kellaways Rock

Kellaways Clay Macrocephalitan . . . . Upper Combrash But the genera Kepplerites and Toricelliceras are unknown in England, <ind may represent a time between the deposition of Upper Combrash below and of Kellaways Clay above — a non-sequence in England.

It is obvious from these Tables that the old familj- Kosmoceratidae has become too unwieldy, and that some lines of separation should be adopted. The following scheme is, therefore, proposed :

Superfamily KOSMOCERATACEM, Nov. Kosmoceratidae, as used in this work — see T.A. Ill, p. 53.

I. Family GOWERICERATIDM, nov. Genera which barely rise beyond the runcinate ventral stage, and drop back, sometimes quite early, to rounded. Macrocephalitan and Prop- lanulitan Ages.

2. Family GULIELMICERATID^, Nov.

Genera which reach ventral sulcation and ventral tuberculation, but ■decline to smooth venter. Laterally bituberculate, with final preserva- tion of inner marginal nodes. Proplanulitan and Kosmoceratan Ages.

3. Family PARAPATOCERATID£, Nov.

Genera of uncoiled forms — Criocones and Toxocones. Proplanulitan Age

4. Family Kosmoceratidae, Hyatt

This family name is now much restricted.

Genera which reach ventral sulcation with strongly developed bordering tuberculation, and considerable decline therefrom, but not to smooth stage. Well-developed lateral tuberculation, with decline to costation. Kosmoceratan Age [and into early Vertumniceratan].

The ventral tubercles are septate spines, which are frequently lost, only the septate base remaining ; this base carrying the septum, or the mark of the septum, is sometimes elongated to bridge two or more ribs — it then resembles a clavus.

The foregoing genera may be noted in more detail.

Gowericeratidae. The genera of this family barely pass beyond costate runcination, the venter is devoid of bordering tubercles, and

1926 SYSTEMATIC 21

June

there is, in most cases, quick return to venter rounded. In order of increasing persistence of runcination the genera may be placed as follows : Cerericeras, Galilaeiceras, Gowericeras, Galilaeites, Galilaeamis, Kepplerites, Catasigaloceras, Sigaloceras. In Cerericeras the runcination is feeble and quite transitory ; in Sigaloceras the runcination is marked and persistent. A broken example of Sigaloceras, S.B. Coll. 4122, shows, in the interior, the impression of the periphery of a whorl about 7 mm. in diameter : this has the Parkinsonian, or rather Bigotitean venter (T.A. m. 29, 53) — ribs not quite opposite, with a median interruption. Later the venter becomes rounded, with crossing ribs ; later still, feebly runcinate, with the runcination becoming more and more definite, while the ribs pass over with a slight sag. At about 75 mm. diameter there are signs of rib-failure on the distinctly runcinate venter — the sign of an oncoming smooth stage.

Two genera, Toricelliceras and Toricellites, have to be placed provisionally with those mentioned above, yet they seem almost to be more like forerunners of Kosmoceratidse — at any rate, Toricellites does. Both differ from Gowericeratidae in having attained more than runcinate venter. Both, however, resemble Gowericeratidje in rapid decline to rounded venter — differing in this respect from Kosmoceratidas.

The point now comes for consideration — do these two genera represent, in the attainment of certain characters, stages through which the other Gowericeratids have passed, but have in the main lost by ' skipping,' or do they represent stages to which the other Gowericeratids tried to attain, but in the main failed to achieve, and so dropped back again to lower stages ? — some of them making feeble efforts to remain, for instance, runcinate, others making a prolonged effort in runcination, presumably- on the road to subsulcation. In this view Cerericeras has only very transitory attainment of runcination, while Sigaloceras shows a very prolonged stage, but has no sign of attaining subsulcation.

Gulielmiceratidae : The order of development appears to be as follows : — Runcinate venter, Gulielmina ; subsulcate venter with border- ing tubercles gaining in strength as the ventral ribs fail, Gulielmiceras, Gttlieltnites, Anakosmokeras : these three genera end by becoming smooth, except for retaining, or perhaps rather, it might be said, re-developing, inner marginal nodes. A smooth, or nearly smooth, venter and well- develojjed lateral bituberculation are other features.

There is one peculiarity in the date of these genera : Gulielmina and Gulielmiceras belong to the middle ProplanuUtan Age : then there is a time, the Reineckeian Age, when no Kosmocerataceae seem to be found ; later, in early Kosmoceratan, are two genera remarkably like Gulielmiceras, namely Gulielmites and Anakosmokeras.

Parapatoceratidae : There are, as yet, only two genera — criocone with curved whorls just out of contact, Crioconites — and toxocone, with whorls curved, just short of straight, Parapatoceras.

There seems no reason to suppose that forms of this family are " an independent development perhaps of the later family Reineckeidae " (Spath, Blake Coll. ; Pal. Ind. ix (i), 1924, 12) ; but, rather, that the origin is to be sought in penecontemporaneous forms allied to Toricellites. In Toricellites the cadicone coronate stage of the inner whorls is but feebly involute. Economic disturbance to such a form might produce rapid acceleration in two ways — in shape, from serpenticone to criocone, in ornament, from tuberculate to costate, that is, costate post-tuberculate.

22 TYPE AMMONITES— VI June

This would make the ParapatoceratidzE an aberrant off-shoot of primitive Kosmocerataceae. A similar theory would make the Stepheoceratan- Parkinsonian uncoiled forms, Spiroceras and others, aberrant develop- ments of primitive Parkinsonidae.

Such a theory receives some support from the existence in the Kosmoceratan of a small unnamed Kosmoceratid with polygyral serpenti- cone whorls barely in contact. Such a form is, presumably, a rather primitive Kosmoceratid, which, with a very little disturbance, might easily become an uncoiled form. A similar, little-in-contact form in the Proplanulitan Age, congruous with young Toricellites, may be imagined as ancestral to the Parapatoceratidae.

Uncoiled forms of widely-separated dates are obviously polyphyletic. Uncoiled forms of approximately similar date are not necessarily mono- phyletic. So the family Parapatoceratida; may not be systematically correct : it may be only a convenience. Aberrantism may be looked upon as somewhat of a disease, which may have attacked more than one of the genera of Kosmocerataceje to produce forms like Crioconites and Parapatoceras.

Kosmoccratidae. Most of these genera are remarkable for length of lateral and ventral tuberculation, truly spinosity, and for the number of ribs which may be collected to join to one ventral tubercle (spine). In the order of declining collection of ribs the genera seem to stand as follows : — Kosmoceras , Spinikosmokeras, Hoplikosmokeras, Lobo- kosmokeras, Kalakosmokeras, Bikosmokeras, and the supposed decadent genera, Zngokosmokeras and Kuklokosmokeras. Kosmoceras and Spini- kosmokeras stand at what may be called the acme of rib-collection to one ventral tubercle, 3 or 4 or even more ribs flowing into one ventral tubercle, while the genera placed after them in the foregoing sentence show decline, in steps, down to unity, with final loss of ventral tubercles.

The Kosmoccratidae are distinct from the Gulielmiceratidas in attaining a rounded venter without losing costate ornament.

The genera and families of the Kosmocerataceae show the following phenomena : — i, Faunal repetition : they come in as independent waves not only during two Ages, but during the successive hemera; of those Ages, then they disappear for an Age — Reineckeian — not only from this country, where their absence might be explained by loss of Reineckeian deposits, but, so far as is known, from other places where Reineckeian deposits are well-developed. Then in a later Age, Kosmo- ceratan, they re-appear in abundance, show very flourishing stages of high development — heterogeneity — gradually fading away to less hetero- geneity of characters, but not attaining the simplification — loss of ornament and other features — of even the Gulielmiceratidse. Recog- nisable Kosmoceratids continue into early Vertumniccratan (Professor A. Morley Davies's finds), and then perhaps all die out ; but there is a possibility that genera like Kuklokosmokeras have given rise to forms whose Kosmoceratid affinity would not be readily suspected.

The phenomena shown by genera of the Kosmocerataceae in regard to evolution of characters and the times at which they appear seem to be congruous with those noted for the Oppelaceae (T.A. V, pp. 7 et seqq.). It is the later forms which show the greater amount of acmic characters or high elaboration ; while it is the earlier forms which reveal the larger amount of paracmic or declining characters — none of the

7926 SYSTEMATIC 23

forms showing, as adults, the epacmic or anagenetic characters. There- fore the earlier forms cannot be regarded as ancestral to the later forms, which is the same as was found in the Oppelaceae ; so geological order is, in the main, the inverse of biological order, and the successive waves are only related, not directly to one another, but indirectly as constantly originating from some unknown but persistent common ancestor. Such ancestor may reasonably be conjectured to have arrived at the Telo- ceras-Stepheoceras stage of cadicone coronate, and to have abided in this form in its unknown locality. Perhaps occasionally it branched out into the Parkinsonian broken-venter stage. But the Parkinsonian biological stage has only unituberculation — on the side ; while the Kosmoceratids have bituberculate side and unituberculate venters — trituberculation. So there are two stages between Parkinsonians and Kosmoceratids, bituberculation and trituberculation. The Kosmocera- tids pass through trituberculation before declining : there is no evidence that the early Kosmoceratacese — the Gowericeratidae — all passed through the trituberculate, or even the bituberculate stage before declining : it is possible that they were aiming in such directions, but failed in attainment. In such case there is only a kind of Parkin.sonian biological history before the advent of the cryptogenetic Cerericeras : in the case of attainment there would be a long Kosmoceratid kind of history before it, involving a far greater series of missing forms.

An interesting problem is presented by the disappearance of Kosmoceratacese during the Reineckeian Age ; but it is paralleled to a certain extent by the sporadic appearances and disappearances of Lytocerates and Phyllocerates in the seas of northern Europe. Partly, but not completely, such gaps in their continuity are filled by records from more southerly areas. It is possible to understand that denizens of cold-water areas would invade warm-water areas and suddenly flourish ; because this is in accordance with usual biological phenomena. But it is not easy to understand the inhabitants of warm seas invading cold seas, except on the postulate that the cold seas became temporarily warm owing to climatic or physical changes. In any case, however, there seem to be long gaps in continuity of record, for which the only explanation would appear to be that comparatively primitive forms lay, more or less dormant, in unknown or untapped areas, ready to take advantage of favouring recurrent conditions to spring into flourishing development — such development necessarily nearly parallel to what had gone before. But the degree of such parallelism depended on the degree of development of the dormant forms. If they were more or less developed along a given line they would produce somewhat close parallelism ; but if they were decidedly primitive they would not be set on a given course, but would be more capable of launching out into quite new directions.

Some such theory is necessary to account for the reappearances after temporary absence of forms which, from their essential similarity, appear to be actually related, as distinguished from those forms which are superficially alike, but are obviously not related.

A few examples of the re-appearance of presumably related forms, after a more or less prolonged absence, may be given. For the time- scale see T.A. V, pp. 71-78.

HapLopleuroceras in Sonninian Paltoplenroceras in Amaltheian

24 TYPE AMMONITES— VI June

Fontannesia in Sonninian Dumortieria in Dumortierian

I Eudmetoceras in Sonninian i Parammatoceras in Ludwigian Hammatoceras in Dumortierian

Defossiceras in Liparoceratan Euagasstceras in Agassiceratan

Angulaticeras in Oxynoticeratan Schlotheimia in Schlotheimian

The re-appearance of oxynotes in the Polymorphitan Age, after absence during the Deroceratan and presence in the prior Oxynoticeratan Age, is not necessarily congruous with the above cases. The genera involved are highly catagenetic ; their general similarity in shape indicates degeneration along similar lines of decline (convergence), not necessarily intimate relationship. More strikingly is this brought out in the Cretaceous species of oxynotes, which have for long been placed in the genus Oxynoliceras, as if they were actually related to the Lower Lias (Oxynoticeratan Age) genus. Such relationship is quite out of the question — the gradual decline of distinct and quite unrelated forms to a general oxynote shape is now recognised as a usual phenomenon of extreme senile decay.

Ammonoid Species named pringlei : During the last two years the trivial name pringlei has been applied independently by three different authors to three different Ammonoids of the Portlandian- Kimmeridgian deposits. The first in order of date is Wheatleyites pringlei, Pruvost, 1924 (Pringle and Pruvost, Serie portlandienne du Boulonnais ; Comptes rend. Acad. d. Sciences, clxxviii, pp. 399, 400) : this, however, is a nomen nudum, for there is neither description nor figure.

The next name is Shotoverites pringlei, S. Buckman, April, 1925 (Type Amm., PI. DLXII), the holotype of which is a fairly large specimen obtained by Mr. J. Pringle at Shotover Brickyard, near Oxford.

Then in June, 1925, are published figures and descriptions of Wheatleyites pringlei, Pruvost (Ann. Soc. geol. du Nord, xlix, p. 209, PI. H, figs 1-7).

The last in date is Pallasiceras pringlei, Neaverson, 1925 [Jan., 1926 ?], Amm. Upper Kimm. Clay ; University of Liverpool, p. 20, PI. I, L 10).

Shotoverites pringlei has a suture-line formula as follows : 48, 40, 46, 22, Li being decidedly trilobulate and narrow-stemmed.

Wheatleyites pringlei, Pruvost. The author has not selected any holotype, and, as seven specimens are concerned, which may or may not be conspecific, it is necessary to choose one. Therefore as lectotype is taken the example depicted in figs, i, la-ic, concerning which there is most pictorial information. The suture-line formula of this form comes out, from the lobe-line depicted, as SI. (fig.) 32, 44, 42, 22. The difference between this formula and that of Shotoverites pringlei is not great, but Li is different in shape — it is not markedly trilobulate and is broad- stemmed, somewhat oblong. There might reasonably be hesitation in

1926 SYSTEMATIC 25

excluding it from the genus Shotoverites ; but there can be no hesitation in saying that its SI. • formula shows it not to be Wheatleyites — for its EL and Li are some 20 per cent, too short (see this Vol., p. 9). Therefore Pruvost's pringlei runs considerable danger of clashing generically with Shotoverites pringlei, with which, however, it is not conspecific. The likeness is sufficiently strong to suggest that the La Rochette phosphate bed of the Boulonnais may be isochronous with a lower part of the Shotover Sands (Paravirgatitan). This is, in spite of all that has been written about the correlation of English and Boulonnais Port- landian strata, one of the very few points where the Ammonoid fauna, as at present known, suggests synchronism.

By the kindness of Dr. Dutertre, Boulogne Museum, I have been able to examine a considerable series of Ammonoids from the Port- landian-Kimmeridgian strata of the Boulonnais. Striking is the lack of identity between the fossils of the Boulonnais and the English areas — those of the Midlands and Dorset coast. But more agreement may be found when the Ammonoid faunas of the two countries are better illustrated and better understood — especially may the south-east English area (Kent coalfield) be expected to help. But at present the Boulonnais area seems to have the largest number of gaps, lacking many of the Ammonoid elements so conspicuous in England. On the other hand there are Boulonnais Ammonoids not yet seen in England, though some may be expected from certain English beds where specimens are badly preserved.

No surprise need be felt at this lack of identity, when the same phenomenon is to be seen in closely contiguous Portlandian-Kimmeridgian areas in England. For instance, the Hartwell Clay Ammonoid fauna, Holcosphinctes, Aposphinctoceras and Episphinctoceras have only been found very locally in England, and no trace of them has yet been seen among the Ammonoids of the Boulonnais.

Lastly, Dr. Neaverson's Pallasiceras pringlei is a species quite distinct from Shotoverites pringlei or from " Wheatleyites " pringlei. It is of later date, coming from the beds of Chapmans Pool (Paravirga- titan, lyditicus) ; but the author does not give a suture-line to enable the reader to decide whether the genus be Pallasiceras or Lydistratites. However, the Officers of the Geological Survey have most kindly sent me their examples of his types, and it can be said the Neaverson's Pallasiceras pringlei is generically correct, possessing the short lobes of the genus.

In regard to the species attributed by Dr. Neaverson to the genus Aposphinctoceras, mentioned above as from Hartwell Clay, there is much trouble. The genotype is a species from the Littleworth Lydite Clay (Paravirgatitan 8, T.A. Ill, 26) of Chippinghurst, near Chiselhampton, Oxfordshire (M. Healey, Jur. Amm. ; Q.J.G.S., Ix, 1904, 61, PI. xii, Olcostephanus pallasianus ; Neaverson, Geol. Mag. Ixi, 1924, 149, Aposphinctoceras decipiens, name given to Healey's figures), and it is doubtful if it is generically different from the prior-named Lydistratites. But the Hartwell-Clay species, which, I contend, are of much earlier date (Pseudovirgatitan 3, T.A. Ill, 33), Dr. Neaverson has put into his Aposphinctoceras (op. cit 11, 3-5 — Ap. alleshuriense, hartwellense, variabile). These Hartwell species are not claimed by Dr. Neaverson as conspecific with the Chippinghurst species, and it is obvious that

26 TYPE AMMONITES— VI Aug.

they are not congeneric : the style of ribbing is different — the point of bifurcation much nearer the periphery in Ap. decipiens than in the other species.

This introduces a question of chronology which is intimately bound up with a question of the systematic position of species. Faunal similarity of two deposits well separated in point of time has misled observers into saying that the two deposits are isochronous. This is an important point, about which a separate statement must be made below.

The date of Dr. Neaverson's memoir : In p. 24 above I have given a query as to the date of this publication. Dr. Neaverson has since kindly written to say that " the exact date of publication is 22nd Dec, 1925."

The species called pseudogigas : The propriety of selecting as a neotype of Blake's Ammonites pseudogigas a specimen from the Creamy Limestones of Buckinghamshire has been questioned. It seems advisable to make the position clear. In the stratigraphical part of his paper on the Portland Rocks (Quart. Journ. Geol. Soc, xxxvi, 1880), Blake cites the species from 3 or 4 horizons : — i. Shell Bed of Portland (p. 192) ; 2, Creamy Limestones of Bucks (p. 216) ; 3, Rubbly Beds of Bucks (p. 218) ; 4, Shotover and glauconitic sands (p. 225). No. i is of Behemothan Age, No. 2 Gigantitan, No. 3 Behemothan, but not, perhaps, isochronous with No. i ; while No. 4 is Paravirgatitan of my Chronological Scheme, T.A. Ill, 26. It is obvious that the name was quite uncritically applied to several different species. Blake's types cannot, it seems, be identified, so the selection of a neotype is governed by the following principle — a specimen from one of Blake's cited locahties and horizons agreeing with the details which he gives in his palaeonto- logical description (p. 228). There he says :

" Ammonites pseudogigas, spec. nov. I confer this name on " certain specimens which have in the inner half of the whorl " large knobby ribs which bi- and trifurcate. It has the whorl " as much inflated as in A. gigas ; but the ribs are more " numerous than the knobs in the latter species, and are " more truly ribs." The statement about the inflation settles the species to be chosen — Am. gigas at a diameter of 221 mm. has an inflation of 47 per cent. ; the species from the Creamy Limestone figured by me as neotype of Am. pseudogigas has at 215 mm. an inflation of 48 per cent. My experience of Portlandian Ammonites shows that the species from the Creamy Limestones of Bucks must be the one from which Blake took this detail of the inflation, and that no other species from other Port- landian beds attains such thickness and has at the same time the stout ribs which Blake mentions.

Therefore, Ammonites pseudogigas, or, as it is now, Trophoniies pseudogigas, cannot be quoted as a species of the lower portion of the Portlandian stone-beds (Behemothan Age) ; but it is a species of the upper portion of these stone-beds (Gigantitan Age) just earlier than Gigantites. The species which may take the place of pseudogigas as a zone-fossil for a portion of the lower stone-beds is Kerberites kerberus, possibly not one of the species which Blake called pseudogigas.

7926 SYSTEMATIC 27

The date of Hartvvell Clay : For some years, in successive publications, the Officers of the Geological Survey have correlated the HartweU Clay with the rotundum beds of Chapmans Pool, Isle of Purbeck, Dorset, with the Swindon Clay of Swindon, Wiltshire, with the clay above the Shotover Grit Sands of Shotover, Oxfordshire, and therefore with the clay above the Wheatley Sands of Wheatley, Oxfordshire — this clay being what I had named Littleworth Lydite Clay.

There is no objection taken to the correlation of the rotundum zone of Chapmans Pool with the Swindon Clay and with the Littleworth Lydite Clay ; but when they also correllate these deposits with the HartweU Clay of HartweU, near Aylesbury, serious protest must be made, because the stratigraphical sequence of the beds is quite opposed to it. Their statements are in the following publications : — Chatwin & Pringle, Zones of Kimm. & Portl., Mem. Geol. Surv., 1922, 163 ; Lamplugh, Kitchin & Pringle, Concealed Mesozoic Rocks in Kent ; Id., 1923, pp. 222 et seqq., PL II ; Pringle, Geol. Oxford, Ed. 2, Id., 1926, p. 73. Also Pringle & Pruvost, Portl. Boulonnais ; Compt. rend. Ac. Sci. clxxviii, 1924, 399 ; Pruovst & Pringle, Geol. Boul. ; Geol. Assoc, xxxv, 1924, pp. 44 et seqq. No surprise need be felt at the correlation put forward by the Survey, because till a few years ago the Portlandian-Kimmeridgian Ammonoids of this country had received very little critical attention, the many species possessed few, if any, names, and the strata could not be properly studied. The likeness of the Ammonoids of the HartweU Clay and of Chapmans Pool is admitted ; but it is a deceptive Ukeness : it is misleading faunal rejjetition similar to that which for more than fifty years caused the Gravesia-hediS of the Middle Kimmeridgian to be confused with the Gigantitid beds of the Portlandian, because of the general likeness of their respective Ammonoids. Of recent years, however. Dr. E. Neaverson has studied the Ammonoids of some of the beds concerned (Zonal Nom. Kimm. Clay ; Geol. Mag. Ixi, 1924, p. 145 ; Amm. Up. Kimm. Clay ; University of Liverpool, 1925). He supports the contention of the Survey as to the practical isochronism of the two clays in question ; but only by the misidentifica- tion of Aposphinctoceras dealt with above (p. 25) and by a stratal correlation which is easily shown to be erroneous.

In my Chronology T.A. IV, 26, I placed the Littleworth Lydite Clay as another form of the Lydite Bed, and associated both with the Swindon Clay, placing them above the Shotover Sands, the Thame Sands and the Wheatley Sands, while I placed HartweU Clay and Crendon Clay as below these Sands.

To make this clear, the following sequences in Bucks may be given :

A. Aylesbury Area B. Long Crendon

8.	Creamy Limestones	8.	Creamy Limestones
7-	Sands	7-	Sands and Rubble Beds
6.	Glauconitic Beds	6.	Glauconitic Beds
5-	Lydite Bed	5-	Lydite Bed
3-	Upper HartweU Clay	4-	Thame Sands
2,	Lower HartweU Clay	3-	HartweU Clay
		2.	Crendon Clay

28

TYPE AMMONITES— VI

Aug.

These may be compared with those in Oxfordshire

C. Wheatley D. Shotover Brickyard

7-	Littleworth Sands	7. Littleworth Sands
6.	Hidden	6. Glauconitic Beds
5-	Littleworth Lydite Clay	5. Littleworth Lydite Clay
4-	Wheatley Sands	4c Shotover Grit Sands
I.	Mild Clay	4b Shotover Fine Sands 4a Wheatley Sandrock I. Mild Clay

It will be noticed that there are two gaps in these sequences, and that really they cause all the trouble — one is the absence of Sands (No. 4) from Aylesbury area, and the other is the absence of Hartwell Clay (3, 2) from the sections of Wheatley and Shotover. But such non-sequences are a well-known phenomenon in geology, for which the investigator should always be prepared.

These sequences may now be combined and dated as follows. For further details see T.A. IV, 26-33 and T.A. V, 71.

Numbers

Table VI — Chronology Hemerm

Ages

8.	Several	Gigan titan
7-	Several Several
6.	Behemothan
5-	lyditicus
4-	paravirgatus, pedinatus, etc. ^	>• Paravirgatitan
3-	pallasioides
2.	inflatum {Episphindoceras
	inflatum, Neav.)	>■ Pseudovirgatitan
I.	grandis (Virgatosphindoides grandis, Neav.)

Dr. Neaverson (op. cit., 1924, 145) accepts the identity of Crendon Clay with Lower Hartwell Clay, but places the Crendon Clay (2) as equivalent to the Littleworth Lydite Clay (5), and then supposes that the Littleworth Sands are the equivalent of the Thame Sands, which makes the Thame Sands not of the same date as the Shotover Sands. But this reading is disproved by the sequence shown in about the middle of the Shotover Brickyard (D), where the Littleworth Sands are seen overlying the Glauconitic Beds. Now the Glauconitic Beds, with characteristic Ammonoids, are a most persistent and easily-recognized stratum throughout the whole length of the Portlandian Lower Stone- Beds (Behemothan) of Oxfordshire and Buckinghamshire. The Glauconitic Beds overlie the Lydite Bed, which caps the Thame Sands. The Hartwell (Crendon) Clay of the disused brickyard of Long Crendon, which has yielded H. pallasioides and E. inflatum, underlies the Thame

1926 SYSTEMATIC 29

Oct.

Sands : at Hartwell the clay (or clays) with the same species underlies the Lydite Bed.

Further objections to the Survey contention are that no species of Hartwell-Clay ammonoids have been produced from the rotundum clays of Chapmans Pool, from the Swindon Clay, nor from the Littleworth Lydite Clay of Wheatley and Shotover : these clays yield Lydistratites and Pallasiceras, which have not yet been produced from the Hartwell Clay, but have been produced from the Lydite Bed of Hartwell and Long Crendon (T.A. CCCLIII, DCV, DCVl). Then the isochronism of the Thame Sands, of Thame and Long Crendon, with a part of the Shotover Grit Sands is attested by the species of Paravirgatites (T.A.

cccvin, cccLxxxn, dciii).

An interesting observation may be made about the Paravirgatitan strata (Shotover Sands) of Shotover. Working from south to north there are three exposures seemingly on the same general level — two in the brickyard and one beyond the waterworks. These exposures yield different ammonoids and are presumably distinct in date, there being distinctions also in lithic character of the sands and of the contained doggers. On the south is the earUest with WhecUleyites, in the middle come Pectinatites, Keratinites and Shotoverites, while from the northern pit came Paravirgatites. It is only Paravirgatites which has yet been found in the Thame Sands to the eastward : one specimen was in place and came from sandrock near the top (T.A. DCIII).

The true thickness of the Shotover Sands of Shotover may, therefore, be much greater than the apparent thickness — there may be obhque bedding.

Reference has been made above (p. 25) to the difference, in so-called Aposphinctoceras-species, in regard to the length of the primary ribs : those of Hartwell-Clay species being short — the division into secondaries taking place about the middle of the lateral area ; those of the Littleworth Lydite-Clay species being long — the division taking place near the ventral border. There is a certain altemance in date in respect of showing this character, as the following Table illustrates.

	Table VII — Ribbing
Strata	Species	Primary ribs
Rubbly Beds ^	Crendonites and various forms
Glauconitic >	of gorei aspect	Long
Beds (part)
Glauc. Bed,	Hydrostratites, see
Waterstone	PI. DCLXXVI	Short
Lydite Bed	Lydistratites, Pallasiceras,
	A posphinctoceras	Long
Shotover Sands	Paravirgatites, etc.	Short
Hartwell Clay	Holcosphinctes
	Episphincloceras	Short

In regard to long and short primary ribs, a warning should be given about side-view figures reproduced from photographs. If a short-focus lens be used, the length of the primary rib in relation to the secondary rib is enlarged, because the true length of the secondary rib is unduly reduced. It is easy to see why ; but it is a point that may be overlooked in comparing figures. Also, care has to be taken in judging the

30 TYPE AMMONITES— VI Oct.

comparative length of primary and secondary ribs in specimens which are crushed flat.

Until these various faunal and stratigraphical statements can be refuted, not by mere surmise, but by quite definite evidence, one must decline to accept the conclusions of the Survey or of Dr. Neaverson that the similar-looking biplex ammonoids of Chapmans Pool and Hartwell are specifically identical or even sufficiently approximate to warrant the statement that their respective deposits are isochronous. My visit to the Dorset Coast this summer (1926) has shown that the claims of Dr. Neaverson, as to how the upper part of Hartwell Clay is to be correlated, and what the Dorset Portland Sands represent, are far too hasty. The visit has enabled considerable advance to be made in the correlation of the Upper Jurassic strata, as will now be detailed.

Dorset Coast Strata : During a visit this summer to the Isle

	"A
c	■ifii."., ^^^
n. A
^ rt^		fe jd^'
	^MvQHiBL
^SS^^^^^Btl^'-' ^		H^^^K. iH
— ..^,	:*'' "^^^^^^^T^ '"^S	g. .
		^^
'J	m	1 .
	•gitim	i

Fig, I. Hounstout Cliff and Chapmans Pool x 000027 O"" i : 359^ ; taken from about S.S.E. A. Chapmans Pool ; B. Old road, foundered in places ; C. Hounstout Cliff above road. For explanation of small letters see text. Summary, p. 34,

of Purbeck I had the good fortune to meet Mr. C. H. Waddington, who had commenced a study of the Portland Sands of Hounstout Cliff, Kingston. Mr. Waddington's assistance I most gratefully acknowledge : owing to the short time at my disposal, and my limited capacity for the fatigue of climbing, his help was extremely valuable. He showed that the cliff of Hounstout was quite readily climbable, especially just west of the shoulder seen to the left in Fig. i, and he was able to prove positions in situ and confirm my surmises as to the beds from which had come specimens collected from various fallen blocks. He is continuing his researches, and there is every reason to suppose that he will be able to make important additions to the more exact correlation of Portlandian-Kimmeridgian strata of Dorset.

1926 SYSTEMATIC 31

Hounstout Cliff is 501 feet above mean sea-level, its base being the perpendicular cliffs, which form the northerly rim of Chapmans Pool — the clays with rotundum nodules. As the nodules are about 15 feet up, while the top of Hounstout consists of some 50 feet of the lower part of Portland Stone Beds, some 70 feet may be allowed, leaving 430 feet for Portland Sands and so-called Kimmeridge Clay of Hounstout-Chapmans Pool. Then, if the rotundum nodule-layer is correlated with the Littleworth Lydite Clay, and that with the Lydite Bed of Long Crendon, Bucks, while the basal Portland Stone of Hounstout is correlated with late Behemothan, which is fairly obvious from Mr. Cox's researches at Portland (Shell-Bed ; Proc. Dorset F.C., xlvi, 1925, p. 113), there are some 430 feet of strata in the Isle of Purbeck representing the same interval of time as only 15 feet of strata do in the north-west quarry of Long Crendon, Bucks. In both cases it may be surmised that the amount of strata actually preserved is less than the amount of strata originally deposited ; but it is fairly obvious that the actual amount deposited in the Isle of Purbeck was far greater than that deposited in Bucks. But, again, it may be assumed that in Bucks the amount removed was far greater in proportion to the amount deposited, for in Bucks there are rapid lithic changes, signs of redeposition and erosion ; while in the Isle of Purbeck the lithic changes are fairly gradual. But suppositions of a far greater deposition in the Isle of Purbeck, and of far greater denudation of less deposits in Bucks, do not altogether explain the difference — ammonoids and other fossils collected in Dorset suggest a whole series of episodes not found in Bucks : whether the strata of such dates were never deposited in Bucks, or whether they were deposited in an attenuated condition and removed by penecontemporaneous erosion, may wait further evidence.

E. Hounstout and Chapmans Pool. (Blake's numbers cited below, in brackets, refer to his section of St. Albans Head, about one mile to southward — Q.J.G.S., xxxvi, 1880, 193. For the letters marking beds, see Summary, sequence F — page 34).

r. Portland Stone, Flinty Series [with Shell Bed at base ?] (Blake's 10).

Portland Sands — Cement Stone Series (Blake's 11, 12 and perhaps 13, for which he gives 85 feet) : —

14. p. " Two blocks of sandy cement stones " show as two prominent parallel bands beneath the stone series of Hounstout (Fig. i, page 30) and in the west-facing cliff running towards St. Albans Head.

13. n. A strong band of white argillaceous cement stone stands out prominently in Hounstout, towards the lower part of the Cement- Stone series. It yields many of the fallen blocks lying on the ledge about the level of the old road (Fig. i, B), and it is the home of specimens of Leucopetriies (PI. DCLXXVII).

II. /. Below is a less prominent cement-band (Blake's 13 ?) of a bluish colour, from which Mr. Waddington reports Thracia : it is possibly the home of a biplicate Ammonoid (No. 4650, S.B. Coll.).

Portland Sands — Sandy Series : —

9. h. A little below 11 there stands out as a prominent band in Hounstout Cliff a massive yellow and blue sandstone bed, some 5 feet in thickness (Fig. i, h) : this is the most prominent datum-line in the cliff, and blocks which have fallen on the ledge and shore below can be easily identified : they yield biplicate ammonoids which have a great

32

TYPE AMMONITES— VI

Oct.

likeness in ribbing to the outer whorl of Virgatites pallasi, Michalski sp. (i8go, IV, i), in that the spaces between the primary ribs are wide, while the secondary ribs are approximate — making only a narrow V.

-r,..* •

■r^

ff.fi.

Fig. 2. Rhynchonella portlandica, Blake x o'gS An area of about y\ square inches shows some 20 specimens of the Rhynchonella with examples of a rugose Exogyra at N. and in N.W. corner. From [bottom of] a large fallen block of Massive Bed (/()

Fig. 3. Portion of Fig. 2 enlarged, x 1-5 ["The Exogyra may be compared with E. spiralis, Goldfuss " J.W.T.]

In a fallen block in the little bay immediately west of Chapmans Fool my eldest daughter called my attention to an ammonoid which turned out to be the only English specimen that I have yet seen with satisfactory virgatite, quadruplicate ribbing. It is ciushed and otherwise

1926 SYSTEMATIC 33

defective, but its likeness to Virgatites scythicus is so great that it is figured in PI. DCLXXV. Its matrix is a blue sandy stinkstone — that is, smelling when struck — which, however, may be a character of more than one of the Portland-Sand beds. It is judged to have come from the base of the Massive Bed (h).

From a large fallen block of the Massive Bed, on the beach which forms the western side of Chapmans Pool, and presumably from what is its base, I obtained a considerable series of Rhynchonella portlandica, Blake, (all crushed), mixed with a curiously rugose Exogyra (Figs 2, 3, p. 32). Subsequently Mr. Waddington found this Rhynchonella in the Massive Bed in situ, but not abundant.

7. /. A few feet lower is another indurated sandy block, about two feet thick, but no fossils were obtained. (This and the Massive Bed appear to correspond to Blake's 14, 15, except in the matter of thickness. Blake's 16 is below : it can be divided more than he has done.)

6. (16 [a]), e. Blue Sandy Marls, with more or less of stinkstone bands : these are 40 or 50 feet in thickness, and extend down to about the old road. According to the colouring of the Geological Survey Map, No. XVI, 1855, this is the base of the Portland Sands. H. B. Woodward (Ool. Rocks, V ; Mem. Geol. Surv'., 1895, p. 191) makes Lower Portland Beds ( = Portland Sands) end with the Massive Bed. Blake carries the beds 80-100 feet lower.

Kimmeridge Clay : —

5. (i6[b] ). d. Dark clays, no fossils found, perhaps 30 feet.

4. (i6[c] ). c. Rhynchonella marls : they yield a Rhynchonella, small Lamellibranchs, Cidaris spines and Belemnites : they are perhaps 15-20 feet in thickness. Mr. Waddington discovered the bed with this fauna, and I confirmed it. The Rhynchonella is like R. subvariahilis, Davidson, but is doubtful, because the specimens lack the longitudinal striation mentioned by him : his original specimens came from the Kimmeridge Clay of Potteme, Wilts.

3. (i6[d] ). h. Lingula shales. Light-coloured arenaceous shales with many Ltngulee. Blake mentions the LingulcB as about 40 feet above Kimmeridge Clay, and that the line of separation from that clay is " more or less arbitrary " (p. 195). The cliffs on the north rim of Chapmans Pool seemed to show above the rotimdum beds a line of demarcation, as if tfiere were a non-sequence ; but this would be far lower than what Blake calls the top of Kimmeridge Clay.

The Beds i6[b-l] were examined on the valley-side south of the stream, between th«^ stream and the Coastguard Station. The Lingula is not L. ovalis, Sowerby, which is doubtfully a Kimmeridgian species ; but the Chapmans-Fool Lingula is little, if any, different from other so-called Lingula ovalis found in quite other horizons of Portland Sand and Kimmeridge Cl^y. As a dating fossil it is, probably, useless, but must serve for the present.

2. a'. Rotundum Clays, with nodules. A line of ammonoidiferous nodules which is, under Hounstout, about 15 feet above the beach, dipping to about 10 feet or less southwards, near the boat-house, yields Lydistratites and Pallasiceras uncrushed, but the large specimens often imperfect.

I. a. Crushed Ammonoid Shales : The base of the cliffs and the pavement of the beach show a multitude of crushed ammonoids, some of quite large size. It is possible that they are neither Lydistratites nor Pallasiceras, but Paramrgatites. The differences between these genera,

34

TYPE AMMONITES— VI

Oct.

all of which have rather similar bifurcating ribbing, with periodic swollen ribs parted by deep constrictions, may be given as follows : — Lydistratites — primary ribs long, lobes long Pallasiceras — primary ribs long, lobes short Paravirgatites — primary ribs short, lobes short

A summEiry of the Isle of Purbeck sequence may now be given- It seems to disclose a quite unexpected result, namely, that the position of a part of the Volgian Stage of Russia is in the Portland-Sands series of Dorset and is lacking from any sequence of the Buckinghamshire beds. Therefore it will be necessary to interpolate a Virgatitan Age in the chronological scale.

F. Summary — Isle of Purbeck

Strata

Fauna

Age & Hemera

Portland Stone :

s. Building Stone, etc.

r. Flinty Series

q . SheU Bed Portland Sands :

Cement Stone Series

p. Parallel Beds

0. Marl

n. White Cement Stone

m. Marl

1. Blue Cement Stone k. Marl

Portland Sands : Sandy Series : h. Massive Bed

g. Sandy Marl f. Thin Sandstone Bed 6. Blue Marls Kimmeridge Clay : d. Dark Clays c. Rhynchonella Marls b. Lingula Shales a'. Rotundum nodules

a. Crushed Ammonoid Shales

Kerberites

Leucopetrites

(PI. DCLXXVII)

Biplicate Amm.

Rhynch. portlandica, Virgatites

R. subvariabilis ? Lingula " ovalis ' Lydistratites, Pallasiceras

Paravirgatites ?

Gigan titan Behemothan kerberus

leucus

aquator ?

Virgatitan scythicus

Para virgatitan lyditicus

paravirgatus ?

A provisional correlation and dating of the strata of Long Crendon, Bucks (compare T.A. IV, 26, V, 71), of Swindon, Wilts (T.A. IV, 28), and of the Isle of Purbeck may now be presented. Opportunity has been taken to give the thicknesses of the Long-Crendon beds ; not that thickness is of any importance in chronological work, especially when, as in Bucks-Oxon, there is rapid variation in a few miles.

The names printed in capitals of the beds of the Isle of Purbeck were given to me by the manager of the Worth Stone Quarries ; others are from Blake and Woodward. Those below the Shell Bed are a rough synopsis of my researches in company with Mr. Waddington.

1926

SYSTEMATIC

35

Beds which bear the same number as a hemeral term may be considered as dated on fairly satisfactory evidence : those not numbered, but placed more or less on the same level, are suggested as possibly isochronous, but the suggestions require further proof.

Table VIII — Chronology and Correlation

Swindon

Age & Hetnera		Long Crendon
jantitan
39. glottodes	39-	Upper Witchett {3')
38. hippocepha-	38.	Osses Ed (2' 6')
liticus
37. Briareites		Sandstone (i' 7") (37. 36, of Had-
36. Titanites		denham, Bucks)
35. Gigantites	35-	Hard Lime (i' 3')
34. Trophonites	34-	Soft Rock (9')
33. fasciger	33-	Lower Witchett (i')
	32.	Hard Stone (i' 3')
	31-	Waste (7')
liemothan
30. vau	30.	Hard Brown (i' 2')
	29.	Crendon Sands (bluish)— (c.5')
	28.	Sandy Marl (i' 6")
	27.	Shelly Rubble d' 0')
26. leptolobatus	26.	Blue Shelly (2')
	25-	Sand & Stone (8')
	24.	Specked (7')
	23-	Dirt (5")
22. kerberus	22.	Rubbly Lime- 22 stone (2')
21. polypreon		Green specked (9") 21
	20.	Brown layer (3')
19. leucus	19.	Green marl (8')
18'. glaucolithus	18.	Building Stone, 3'
18. megasthenes
17. aquator	17-	Waterstone, 10'
■gatitan
15. scythicus

37-

Isle of Purbeck

Creamy

Limestone Roach

Blue Bed

{Briareites ?)

Cap Spengel

Whit Bed or (u)poN Free- stone

Chert Vein

LiSKY Bed (white, soft)

Cap

Base Bed, or Bottom Free- stone

Chert Beds

Cockly Bed 22. Shell Bed Sandy Limestone

10. subvariabilis 9. LingiJa

19.	White Cement
	Stone
	Blue Cement
	Stone
16.	Marls
15-	Massive Bed
14-	Sandy Marl
13-	Thin Sandstone
12.	Blue Marls
II.	Dark Clays
10.	Rhynchonella
	Clays
9-	Lingula Shales

36

TYPE AMMONITES— VI

Oct. 1926

Table VIII — continued

Age & Hemera Paravirgatitan 8. lyditicus

7. paravirgatus

6. pectinatus

5. pringlei

4'. Wheatleyites

Holcosphinctean 3. pallasioides

2. inflatum

I. bivius & grandis

Long Crendon

8. Pebble or Lydite,

(5") 7. Thame Sands (80')

3. Hartwell Clay 2. Crendon Clay

Isle of Purbeck

Rotundum

nodules Crushed Amni.

Shales

White Septarian Band

Oil Shales

Swindon

8'. Upper Lydite i 8. Swindon Clay 7. Lower Lydite

6. 5. 4'-

Sands & Clays

4. Marly Sandstone

Sands with Doggers

Clays above Brickyard of Kings Hill .

Clays in Brickyard of Kings Hill (Hill's Brick- yard)

The thickness of the Thame Sands was measured, by use of a level, up Barrel Hill, Long Crendon, with the assistance of Mr. Waddington. Besides the named sands — Thame Sands, Crendon Sands, a new term, and Littleworth Sands( = 25) — other Crendon beds develop as sands locally in Bucks-Oxon ; so correlation by lithic character cannot be trusted : to avoid criss-cross correlation, position in regard to other beds and faunal contents must be carefully noted.

The age-name Holcosphinctean is introduced in place of Pseudo- virgatitan, as Pseudovirgatites may not belong to this age.

There are several interesting points in the above correlation : — Leucopetrites leucus (T.A. CCCVII, 1922) received its name because its chambers were filled with a white (Afuxot) matrix, although the specimen itself was embedded in a particularly green marl. In Hounstout the matrix of Leucopetrites is a white cement stone. This may be only a coincidence ; but it may mean that the white cement- stone deposit once extended much further northwards.

Prof. A. Pavlow (Class. Strata ; Q.J.G.S., lii, 1896, 542), shows, in his correlation-table (facing p. 548), at certain localities in Russia, giganteus beds, consisting of glauconitic sands and sandstone, overlying beds with Virgatites. The lithic hkeness to the deposit of Long Crendon and the position similar to that obtaining in the Isle of Purbeck, with regard to the Cement Stone ammonoids and Virgatites, may be only coincidences ; but they certainly prompt the query whether the " large ammonites of the giganteus-iypt," which Professor Pavlow quotes for these beds from Syrzan, Simbirsk and Moscow, may not be species of the Buckinghamshire glauconitic beds — Behemoth, Glaucolithites and Leucopetrites ; for the nomenclature at the time he wrote would allow such forms only his given designation, since they are large and they resemble giganteus, but had no precise names.

1926 SYSTEMATIC 37

Dec.

In addition to Lencopetrites in the Cement Stone of Hounstout, there is some reason to think that Behemoth lapideus may be found in the cliff, judging by large, much-battered relics lying on the shore among faUen blocks.

A few j'ears ago, during a visit to Ringstead Bay, Dorset, I discovered the position of Rhynchonella portlandica in the faulted mass of Portlandian by Holworth House. The following section was noted, but the thicknesses are only guess-work, as I did not climb much above ' the Rhynchonella seam.

G. Holworth

5. Portland Limestone, Flinty Series

4. Limestone below Flinty Series, about 30'

3. Limestone, more or less sandy, about 10'

2. Brown earthy sands, about 8'

I. Marly to clayey seam with Rhynchonella portlandica, Orbiculoidea " humphriesiana," Orbiculoidea smooth (cf. 0. glabella, S.B., T. A. DXXXIVb) and Lingula " ovalis." This seam is about two inches thick, and these fossils were not found above or below.

This section may be checked by the lower part of that given by H. B. Woodward, op. cit. p. 194. It may be assumed that the Rhyn- chonella horizon is about that of the Massive Bed of Hounstout.

The horizon of Rhynchonella portlandica is thus noted particularly because it is so remarkably like Rhynchonella loxia, Fischer, of the Volgian of Russia. Both are cynocephalous species associated with ammonoids having virgatite ribbing ; but R. loxia is capillate (striate) — • S. Buckman Brach. Burma ; Pal. Ind. iii (2), 1917 (1918), p. 57, PI. xviii, 30, 31 ; while no such character has been detected in R. portlandica. On the other hand, R. subvariabilis is capillate, and might be considered near to R. loxia both in this character and in position ; but the specimens which have been found by Mr. Waddington and myself so remarkably like R. subvariabilis, and apparently much in the same position as the spwcies from Potteme, do not seem to show any capillation.

The position of Orbiculoidea is thus noted because it has now been found in beds which seem to work out as practically on the same horizon in Dorset and Bucks. This, too, may be only a coincidence. The very distinctive little Orbiculoidea humphriesiana ; Blake sp., is quite possibly not the same as Orbicula humphriesiana, J. de C. Sowerby, except in being ribbed. It and a smooth form are minute, no bigger than a large pin's head : they are unattached and very difficult to find : the Orbiculoidea glabella at Crendon is larger and attached.

If the rotundtim beds of Chapmans Pool are correlated with the Littleworth Lydite Clay, a point wherein the Geological Survey, Dr. Neaverson and myself are agreed, and if the Littleworth Lydite Clay be correlated with the Long Crendon Lydite (or Pebble) Bed, which, in face of the ammonoid and stratigraphical evidence, it will be difficult to dispute, then there is a big non-sequence at Long Crendon above the Lydite Bed — all the Virgatitan beds of Hounstout, or all the beds from about the top of the Massive Bed to the top of the rotundum beds — according to Blake, about 160 feet — are missing. There is a bigger gap at Swindon, since the Glauconitic Beds of Crendon are absent from

38 TYPE AMMONITES— VI Dec.

these, so that the gap is from the Shell Bed to the rotundum beds— in the Isle of Purbeck, according to Blake, some 240 feet.

Dr. Salfeld (Jura Nordwesteui;opa ; N. Jahrb. Beil.-Bd. xxxvii, 1913. p. 208) says : " Im ' White ^.eptarien-Band ' fand sich ein partiell verdriickter Perisphinctes aus der Gruppe des P. Pallasianus D'Orbignv." This gives a hint as to where to look for the equivalent of the Hartwell Clay fauna, for quite possibly this is near to Ammonites kimmeridiensis , Seebach, which must be noticed.

Ammonites kimmeridiensis, Seebach, 1864, (Hannoversche Jura, p. 157). The author gives this name to Am. biplex, " Damon Suppl. to the geol. of Weymouth Taf. 10, Fig. g " — a misprint for Taf. g, fig. g. Damon's figure, which is thus protograph of Seebach's species, is now reproduced in T.A. DCLXXIII. Damon says it comes from Portland Stone and Kimmeridge Clay, so that two species are involved — one of which is, possibly, akin to " Perisphinctes " gorei. Seebach says (p. 156) that it is only known to him from the Kimmeridge ; but, as his Kimmer- idge strata are beds below the ^/gas-schichten (p. 157), evidently a third species is involved. This shows how unreliable for correlation are these so-called biplex ammonoids, unless they are very critically determined.

It is now suggested that Damon's form, which obviously has not gorei ribbing, is actually from Kimmeridge Clay, and is what Salfeld calls a Perisphinctes of the P. pallasianus type from the White Septarian Band (see above, p. 37) — that it is, in fact, a Holcosphinctes, possibly little different from the later-named H. pallasioides, Neaverson.

Had Damon said that this species came from the Portland Sand, it might have been suggested that it came from the Blue Cement Stone, and was very near to a Crendon specimen (T.A., PI. DCLXXVl) from the Waterstone, which should be about the horizon of the Hounstout bed. This Crendon specimen is a fourth complication and fourth date for the so-caUed biplex forms. It is distinct from Lydistratites, Pallasiceras and other forms by lacking the periodic thick ribs which border constrictions : it shows neither character.

A biplex ammonoid, presumably- by matrix from the Blue Cement Stone, is quite like .immonites skidegatensis, Whiteaves (Mes. Foss. i (i) ; Geol. Surv. Canada, 1876, p. 34, PL ix, i, not PI. vii), in outer whorl, but the Hounstout specimen (No. 4650, S.B. Coll.) has more crowded ribbing in the inner whorls.

The White Septarian Band is some 200 feet below the top of the rotundum beds, and about another such amount above the ' Oil Shales,' judging by Blake (Kim. Clay; Q.J.G.S., xxx, 1875, p. ig8). It has been claimed that the Oil Shales represent the Shotover Grit Sands of Oxfordshire, but they have not yet yielded the necessary evidence of characteristic ammonoids, many of them giants not easily overlooked — Paravirgatites, Shotoverites, Wheatleyites. All the evidence given is small forms of very uncertain characters, and the biplex ammonoids have shown how similar forms can be repetitive. But if the claim Avere made good, it would be equivalent to saying that at Shotover there is a gap of something like 300 feet between the Shotover Grit Sands and the immediately overlying Littleworth Lydite Clay.

The present correlation scheme, which suggests that there is no important non-sequence at Shotover at such place, that the Littleworth Clay succeeds the Shotover Sands without noticeable break, while the representatives of the Shotover Sands and the Hartwell Clay are to be sought between the rotundum beds and the Oil Shales of the Dorset

7926

SYSTEMATIC

39

Coast — thus filling up the 300-foot gap to abovit the extent which the relative rates of deposition in the south and the midlands would suggest (above p. 31) — has, at any rate, a deal of probability to recommend it.

The results of this investigation seem to be working out in a manner analagous to that which nearly forty years ago I demonstrated to be the case with the Lias-Oolite (Cotteswold etc. Sands ; Q.J.G.S., xlv, 1889, 440) — in the South of England clay conditions lasted later than north of the Mendip axis, sand also commenced there later, and so did the limestone.

The same phenomena obtain, in a broad sense, in regard to Kimmeridge-Portland deposits, and may be shown by the following Table, with the introductory remark that the use of the terms Portland Stone, Portland Sand and Kimmeridge Clay, as if they connoted sequent rocks of the same date right across country, is to be deprecated. These terms are now coming into popular use in connection with economic questions of agriculture, quarrying, building, drainage and water-supply. Then the usual local sequence — Stone, Sand, Claj% as

Portland Stone Portland Sands Kimmeridge Clay is quite easily remembered and appreciated. But if the statement is made that thick beds of what have been called Portland Sands in Bucks- Oxon for about a century are Kimmeridge Clay, because they happen to lie below beds equivalent to the rotundum clays of Kimmeridge, confusion is the result. It has now to be recognized that the old stratigraphical terms are useless in a strict scientific sense, but are satisfactory as lithic designations when used with geographical qualifica- tions— if, for instance, it be known that the Portland Sands of the Midlands are much earlier in date than the Portland Sands of the South Coast. For it is lithic constitution that is impwrtant in economic questions.

For strict scientific work the Age names are available.

The following Table IX shows the strict scientific Age terms and the variation in dates of lithic conditions according to locality.

Age jigantitan	Table IX — Loc Bucks Upper Portland Stone	.\L Lithic Conditions Swindon Upper ? Portland Stone	Dorset Portland Stone
3ehemothan	Lower Portland Stone	Lower Portland Stone	Upper Portland Sands
Virgatitan	absent	absent	Lower Portland Sands
Paravirgatitan	Portland Sands	Upper Portland Sands Lower Portland Sands	Kimmeridge Clay
Holcosphinctean	Kimmeridge Clay Kimmeridge Clay	Kimmeridge Clay
\llovirgatitan	Kimmeridge Clay	Kimmeridge Clay

This table is only a broad view of the case, for there are temporary local lithic anomalies ; but it gives, in a general way, the sequences of lithic events in the chosen areas.

40 TYPE AMMONITES— VI Dec.

In regard to what has been said above (p. 29) about the dogger beds in the Shotover (Grit and Fine) Sands of Shotover and the differing Ammonoid faunas which they yield : there is an excellent photograph of the middle exposure mentioned — the northern of the two exposures in the brickyard — given in Geol. Oxford, 2nd Ed., by J. Pringle (Mem. Geol. Surv., 1926), PI. iv, fig. A. It shows the different levels at which the doggers he. From the lowest level displayed in this photograph has come Wheatleyites fauna — better developed at the southern exposure of sands in the brickyard, and still better seen at Wheatley brickyard. From the middle layers, hard, bluish grit except where weathered, has come the fauna of Shotoverites, Pedinatites, Keratinites, with large Pernas and other lamellibranchs.

The Hartwell Clay : Since the remarks about the Hartwell Clay and its correlation were published (T.A., part 60, Oct. 1926), Dr. F. L. Kitchin has reiterated a statement of his views (Lam. Upper Kimm. Clay and position of Hartwell Clay ; Ann. Mag. Nat. Hist. (9) xviii, Nov. 1926). His table, p. 453, adds nothing new, and makes the mistake of correlating Portland Sands of Buckinghamshire (Paravirgatitan) with Portland Sands of Dorset (Behemothan). In p. 454 he says : " It is difficult to understand, assuming his [my] interpretation to be sound, how we can account for the absence of the pallasioides-i&nna. [Hartwell Clay] below these sandy beds [pectinatus] at Wheatley, Shotover, and Swindon, and below the Saccocoma-honzon in Dorset. In the first place, the Hartwell Clay should be above the Saccocoma-horizon ; in the second place there are, at Swindon, below the pectinatus beds, a thick series of sands (Lower Cemetery beds) above some feet of clay, whose ammonoid faunas are quite unknown : these beds are where the Hartwell Clay faunas should be sought (p. 36) ; in the third place, local absence of strata is too common a phenomenon to cause any trouble. It is no more difficult to imagine that the Hartwell Clay, some 20-30 feet thick at Hartwell, should be quite absent from Wheatley, some 15 miles to the westward, than to see that the Thame Sands, some 80 feet thick at Long Crendon, separating the Lydite Bed above from Hartwell Clay below, has totally disappeared at Hartwell, where Lydite Bed and Hartwell Clay are in contact — Hartwell being only some 7 miles to the eastward of Crendon.

Dr. Kitchin wishes to show in his paper that the Hartwell Clay and the rotundum beds are synchronous by producing an Astartid (HartwelUa hartwellensis) from both ; but without showing that Astartids are sufficiently restricted in range for such purpose. Considering that there are abundant ammonoids both in the Hartwell Clay and in the rotundum beds, and that ammonoids are known to be very restricted in vertical range, it is surely reasonable to ask for isochronism of these deposits to be proved by them.

There is little to be gained in reiterating statements of correlation without figuring the ammonoid evidence. I have figured such evidence for my correlations of the beds concerned. Though there is still more to be done, this evidence of the figures should be sufficient for judgment on my conclusions. Further evidence may need to be sought at Long Crendon and Brill in Buckinghamshire and at Swindon in Wiltshire, but special excavations will be required.

1

1926 SYSTEMATIC 4J

Dactvlioceratid.e. Generic names in use for this family have long been known as unsatisfactory. Now a series of specimens from the Upper Lias of Barrington, Somerset, gives the opportunity to put them on a surer basis. These specimens are superior for the purpose to those coming from Whitby ; because they were carefully collected by Mr. A. Templeman, bed by bed, and almost inch by inch, whereas the Whitby specimens are only known generally as from Upper Lias, though in a few cases there may be three or four smaller divisions — Grey Shales, Jet Rock and so on ; but these do not compare with some twenty-six divisions of Mr. Templeman for Barrington Upper Lias. Then the Barrington specimens show good suture-lines, whereas, in Whitby specimens, too often the suture-lines cannot be seen, or if shown are difficult to mark on the black matrix.

In the following short generic diagnoses the phrase EL = Li does not here refer to the actual length of the lobes, but is to be read in reference to the guide-line — that the external lobe (EL) and the superior lateral lobe (Li) both come down to the guide-Une. So EL < Li means that Lr comes below the guide-line issuing from end of EL ; and EL > Li, that EL is longer than Li, so far as guide-line is concerned, Li not reaching to guide-hne ; then EL > > Li or EL < < Li means much longer or much shorter respectively. The phrase ' similar species ' indicates those which may be compared to the genotype species, but are not necessarily congeneric — so many forms being figured without suture-line. Cited species having the same trivial name as the genotype are not necessarily conspecific with it.

For the beds of the Barrington Upper Lias, see S. Buckman, Jurassic Chronology ; Q.J.G.S. Ixxviii (1922), pp. 449 et seqq.

Kryptodactylites, nov. ; G. T., S.B. Coll. No. 463, Whitby, Yorkshire, Upper Lias [Grey Shales], identified with Am. semicelatus, Simpson, T.A. XXXL 1911.

SI. somewhat florid, EL = Li, L2 long and aux. i well developed. Oligogyral, parvicostate, without nodes. Similar species : Am. cequi- striatus, Zieten, 1831, xii, 5 ; Am. communis ; Quenstedt, 1885, XLVi, i, 2.

Tenuidactylites, nov. ; G. T., S.B. Coll. 4712, identified with Am. tenuicostatus, Young & Bird, 1822, xii, 8 ; cf. Daciylioceras' tenui- costatum, T.A., 1920, CLVII.

Polygyral, parvulicostate.some ribs entire, versiradiate, parvulinodate, ribs slightly arciate over venter ; EL > Li, L2 unident ; Li short and broad. Septate costee with thick septum raising ribs above cast.

Yorkshire, Upf)er Lias [Grey Shales].

Similar species : Am. anniilatus ; d'Orbigny, Lxxvi, i, 2 ; Stephano- ceras anniilaliim ; Wright, Lxxxiv, 7-9.

Xeinodactylites, nov. ; G. T. Museum of Practical Geology Coll., No. 38013 ; Barrington, Upper Lias, Bed 6, identified with Dactylioceras helianthoides , Yokoyama, 1904, iv, 4-6.

EL > Li ; L2 narrow, trident.

Similar species : Coeloceras marioni, Lissajous, igo6, in, 4.

Anguidactylites, nov. ; G. T., A. anguitormis, nov., M.P.G. Coll. No. 38014 ; Barrington, Upper Lias, Bed No. 11 ; somewhat between Am. raristriatus, Quenstedt 1885, XLVi, 4 and 6, in ribbing, also hke Nautilus anguinus, Reinecke, but more prominent ribbing [finer-ribbed forms possible] ; polygyral, multi-subparvicostate, ribs straight over gibbous venter ; EL nearly = Li, L2 long, narrow, subtrident.

Similar species : Coeloceras (Dactylioceras) anguinum ; Hug, 1898, VI, 2.

42 TYPE AMMONITES— VI Dec.

Nodicoeloceras, nov. ; G. T. A^. crassoides, M.P.G. Coll., No. 31616 ; Banington, Upper Lias, Bed 18/19. Button and loop ornament, EL = Li, L2 strongly bident, Li rather slender; identified with Am. crassoides, Simpson sp., T.A. 1913, LXXXIX.

Similar species : Am. acauthus, d'Orbigny ; Coeloceras fonticulus, T.A. LIX ; Coel. crossleyi, T.A. LX ; Siephanoceras raquiniamim ; Wright, LXXXVII, 7, 8.

Crassicoeloceras, nov. ; G. T., C. pingue, nov. ; M.P.G. Coll. 38015 ; Barrington, U.L. Bed 18/19 ; like Am. crassus, [Coeloceras crassum, T.A. 1918, cxix), but with smaller, closer ribbing; EL = Li, L2 large : suture-line rather florid.

Similar species : Coeloceras foveatum, Simpson sp., T.A., 1913, LXix ; Am. crassus ; Meneghini, Pal. Lomb. xvi, 3.

PoRPOCERAS, S.B. 1911, G.T., P. vortex, Simpson sp., T.A. I, p. v, PI. XXIXa.

Similar species : Am. subarmatus. Young & Bird, 1822, xiii, 3 ; Am. subarmatus ; d'Orbigny, lxxvi ; Hauer, 1856, xv, 6, 7 ; Meneghini Pal. Lomb., xiv, 5 ; Dumortier, iv, xxviii, 6 — 9 ; Stephanoceras subarmatum ; Wright, lxxxv, i ; Steph. crassum ; Wright, lxxxvi, I, 2 ; Ammonites acanthopsis, d'Orbigny, 1S50 ; Collina linae, Parisch & Viale, 1906, x, 9, 10 ; P. verticosum, P. vorticellum, T.A. [Barrington, Upper Lias, Bed 18/19].

Vernnidactylites, nov. ; G.T., Mus. Pract. G. Coll., No. 38016 ; Barrington, U.L., Bed 20, identified with Am. vermis, Simpson sp. T.A. LXVIIL Polygyral, subquadratigyral, multiparvulicostate ; EL > Li, L2 trident.

Toxodactylites, nov. ; G. T., T. toxophorus, nov. Barrington Upper Lias, Bed 22. M.P.G. Coll., No. 38017. Like Am. holandrei, d'Orbigny, but with smaller, less prominent ribs and somewhat different suture-line.

Ribs arcuate over venter ; EL = Li, L2 almost to guide-line, bident.

Leptodactylites, nov.; G. T., L. leptum, M.P.G. Coll. No. 38018 ; Barrington, U.L., Bed 23 ; a leptogyral form like Am. rari- strialus, Quenstedt, 1885, xlvi, 5 (lectotype as having fewest ribs), but is more costate.

SpiniccBloceras, nov. ; G. T., S. spicatum, nov., M.P.G. Coll., No. 38019 ; Barrington, U.L., Bed 23. Somewhat like Am. dayi, Reynes, 1868, v, 7, but different proportions and s.l. more florid ; EL < Li ; L2 trident ; fibulate ornament passing to spinous and then to costate.

Similar species. Am. annuliferus, Simpson, T.A. LXIII ; Am. desplacei ; Meneghini, Pal. Lomb., xvi, 5, 7, 8, (7, 8 = Coeloceras annu- latiforme. Men. 1899).

Lobodactylites, nov. ; G. T., L. lobatum, nov. ; M.P.G. Coll. No. 38020 ; Barrington, Bed 24 ; somewhat similar to Am. crassus, but less cadiconic and with highly complex suture-line : EL = Li = L2.

Peridactylites, nov. ; G. T., P. consimllis, nov. ; M.P.G. Coll. 38021 ; Barrington, U.L., Bed 24. Aspect of Vermisphinctes, T.A 1920, CLXII, but without constrictions. Ribs slightly arcuate over rounded venter ; parvuHnodate ? ; EL < < Li, L2 short, trident.

Similar species : Am. holandrei ; Dumortier, iv, xxvii, i.

Multicoeloceras, nov.; G. T., M. multum, nov.; M.P.G. Coll., No. 38022 ; Barrington, U.L., Bed 26. Like Am. crassus, but

7927 SYSTEMATIC 43

Feb.

less cadiconic, with approximate ribbing, slightly arcuate backwards over venter; fibulate ornament in inner whorls. EL = Li>L2, all subcomplex.

Similar species : Am. crassus ; Meneghini, Pal. Lomb., xvi, 2.

Athlodactylites, nov. ; G. T., Dactylioceras athleticiim (Simpson), S. B., T.A. PL LIb. Like Orthodadylites with appro.ximate elevated ribs, but they curve forward over the venter ; Whitby, Upper Lias, athleticum.

Similar species : Barrington, Somerset, Upper Lias, Bed 2 a ; Dactylioceras crassulosnm, (Simpson), T.A. LVIII ; Am. annulatus ; Dumortier, iv, xxvi, 3, 4.

Simplidactylites, nov. ; G.T., S. simplicicosta, nov., M.P.G. Coll. 38304 ; Harrington, Somerset, Upper Lias ; another example, Barrington, U.L., Bed 22 ; M. P. G. Coll. 38303. Subcadicone passing to serpenticone. Somewhat thick ribs, often simple or undivided, recalling something of Am. ragazzonii, Hauer, (Amm. Medolo; Sitz. d. k. Akad. d. W. math, naturw. CI. xliv (i), 1861, 415 ; \, i6, 17), but with too many divided ribs to allow of any real connection. The ribs of Simplidactylites pass over the venter with a forward sweep ; on sides they are straight without nodes at furcation.

Similar species : Porpoceras crassiusculum (Simpson), T.A. CCIX ;

Koinodactylites, nov.; G.T., S.B. Coll., No. 4713; Whitby, Yorkshire, Upper Lias, [.Alum Shale] ; identified with Am. communis, J. Sowerby, M.C. cvii, 2. EL>Li, L2 bident — all lobes short.

Similar species : Am. angulatus, Sowerby, cvii, i ; Sfephanoceras commune ; Wright, Lxxxiv, i — 3.

Nomodactylites, nov. ; G.T., Nomod. temperatus, nov., S.B. CoU. No. 4714 ; Whitby. Yorkshire ; Upper Lias [Alum Shale] ; EL > Li, L2 short, subtrident ; identified with Am. communis, J. Sowerby, M.C. cvii, 3, (not 2). Differs from Koinodactylites by stouter habit of growth and longer lobate suture-line.

Similar species : Am. raquinianus, d'Orbigny, cvi, i, 2.

Curvidactylites. nov. ; G.T., Curvid. curvlcesta, nov., S.B. Coll. No. 4724 ; Whitby ; Upper Lias, [Alum Shale or Cement Shale]. Like Am. communis. (Koinodactylites) , but with smaller, more numerous ribs, which are slightly curved forward, both laterally and ventrally. EL > Li, L2 unident ; Li and L2 long and slender.

Similar species : Stephanoceras commune ; Wright, Lxxxiii, 3, 4. This shows similar size of ribs, but they lack the curvature, while its suture-line is of Koinodactylites style.

Parvidactylites, nov. ; G.T., Parvid. parvus, nov., M.P.G. Coll. No. 38023, Barrington, Somerset, Upper Lias, Bed [26 ?]. Like Zugodactylites, but with feeble and irregularly-spaced nodate ornament — many ribs without nodes — and a feebly-developed suture-line. No sign of any fibulate ornament. EL > Li, L2 broad.

Mucrodactylites, nov. G.T., Ammonites mttcronatus, d'Orbigny, (Ter. jur. Ceph. ; Pal. fran?., 1845, p. 328 ; civ, 4, 5, 8) ; serpenticone, paucicostate ; bi- (or trifurcate) ; on venter loop-like ribs medianly broken ; EL >> Li ; L2 short, bident, from d'Orbigny's figures.

Similar species : Am. mucronatus ; Dumortier, iv, xxviii, 3, 4.

Dactylioceras, Hyatt, 1867. See T.A. i, 1911, p. v. [D. anmdatum, Barrington, Bed 18/19; M.P.G. Coll. 38302; T.A. PI. DCC ; EL > Li ; L2 short, trident].

44

TYPE AMMONITES— VI Feb.

Peronoceras, Hyatt, 1867. See T.A, i, (1911), v ; G.T., Ammonites fibulatus, J. de C. Sowerby. Button-and-loop ornament, arched ribs on subangulate venter. EL > > Li ; L2 pointed, subtrident. See T.A. 1926, PI. DCLXXXIII]. Upper Lias, [Cement Shale].

Similar species : Ammonites armatus ; Young & Bird, 1822, xiii, 9 ; Am. turriculatus (Simpson), T.A. xxx ; Am. desplacei ; Dumortier, iv, XXVII, 4 ; Stephanocerasfibulatum andrecs ; Wright, Lxxxv, 8 ; Peronoceras preepositum, S.B., T.A. DCCL

CoLLiNA, BonarelH, Boll. Soc. geol. It. xii, 1893, 13 ; Genoholotype (only species figured) Collina gemma, Bonarelli ; serpenticone, pauci- costate, arrow-shaped ribs on a bisulcate, medianly carinatiform venter. (BonareUi's figure.)

Catacceloceras, S.B., G.T., T.A., 1923, CDXIII, C. confectum, S.B., North Nibley, Glos, grandis r,. ; EL> Li ; L2 unident ; all lobes short.

Similar species : Am. crassus ; Dumortier, iv, xxvii, 5 — 7, 10, 11 ; xxviii, I, 2 ; Quenstedt, Amm. Schwab., xlvi, 19-21, 23 ; Stephanoceras raquinianiim ; Wright, lxxxvii. 1-3 ; Coeloceras puteolus (Simpson) T.A. LXL

Orthodactylites, S.B., 1926, T.A. DCLIV ; G.T., 0. directus, S.B., Middleton Cheney, Northants ; Upper Lias, Transition Bed ; versirectiradiate. EL> Li ; si. simple.

Similar species : Stephanoceras commune ; Wright, lxxxvii, 9, 10.

Microdactylites S.B., 1926 ; G.T., M. attenuatus, (Simpson). S.B., T.A., DCLV ; Peak, Yorkshire ; Upper Lias, Jet Rock. Hair-like ribs arcuate over venter.

Arcidactylites, S.B., 1926, T.A. DCLVH ; G.T., A. arctis, S.B., Kings Sutton, Northamptonshire ; Upper Lias, " suhcarinatum." Ribs fairly strong, arcuate over venter. EL> Li ; L2 very small, unident.

Similar species : Am. holandrei ; d'Orbigny, cv, 1-3.

ZuGODACTYLiTES, S.B., 1926, G.T., Z. braunianum, (d'Orbigny), T.A., DCLVin. Northampton, Upper Lias, braunianum. Forewardly- curved paired ribs (yoke-like) on subangulate venter [wh'ch may become rounded] ; continuously subspinous on ventral edge ; [EL < Li ; L2 long, subtrident : all lobes well developed — d'Orbigny's figure, civ, 3].

Similar species: Am. braunianus ; Dumortier, iv, xxviii, 5.

Postscript. Anguidactylites, p. 41. Add, as a similar species, Dactylioceras delicatum (Simpson), T.A. DCLVL

An analysis of the genera of Dactylioceratidae may now be given. This could be carried further, even without touching the important point of sutural differences. For instance, ' Costate ' obviously includes two phases, (i) pre-tuberculate, (2) post-tuberculate. Some forms entered as costate may, therefore, rightly belong to tuberculate, for they might show tuberculation in inner whorls. Also degenerate tuberculation may be overlooked because of its feebleness, or because of bad preservation. The analysis will, however, show which genera come together in similarity of ornament.

1927

SYSTEMATIC

45

Table X — Dactylioceratid^ (Generic Analysis)

I. Costate

Anguidactylites

Koinodactylites

Leptodactylites

Nomodactylites

Orthodactylites I. Costate

A. Ribs small

Kryptodactylites Vermidactylites I. Costate

B. Ribs arched over venter Arcidactylites Athlodactylites Curvidactylites Microdactylites

II. Tuberculate

A. Tubercles persistent,

regular Zugodactylites II. Tuberculate

B. Tubercles intermittent Parvidactylites Tenuidactylites Xeinodactylites

II. Tuberculate

c. Tubercles feeble Dactylioceras Peridactylites

A geological sequence of the Dactylioceratid genera follows. The numbers given (under ' Date ') refer to the Harrington Beds, see S. Buckman, 1922, jam cit., and T.A. v, pp. 75, 76.

Table XI — Dactylioceratid^ (Geological Sequence)

II. Tuberculate

D. Tubercles feeble,

venter subangulate Toxodactylites II. Tuberculate

E. Ribs broken on venter Mucrodactylites

III. Fibulate ornament

A. Post-costate Peronoceras

III. Fibulate ornament

B. Pre-costate Multicceloceras Nodicoeloceras Porpoceras Spinicoeloceras

IV. Cadicone

Catacoeloceras Crassicoeloceras Lobodactylites IV. Cadicone

A. To serpenticone Simplidactylites V. Venter carinatiform Collina

Genus Catacoeloceras Mucrodactylites Collina

Zugodactylites Peronoceras

{Multicceloceras ParvidactyUtes Arcidactylites Nomodactylites Koinodactylites Curvidactylites r Lobodactylites I Peridactylites / Leptodactylites \ Spinicoeloceras /Simplidactylites I iToxodactylites

Date or Bed variabilis {grandis) Upper Lias [late ?] Upper Lias [late ?] hraunianum Cement Shale Barr. 26 [B. 26?]

subcarinalum [B. 26 ?] Alum Shale

Age Haugian Hildoceratan

B. B. B.

24

23

22

46	TYPE AMMONITES— VI	r	Feb.
		1927
	Table XI (contd.)
Gemis	Date or Bed	Age
Vermidactylites	B. 20	Hildoccratan
'Crassicoeloceras J Nodicoeloceras "^ Porpoceras Dactylioceras	B. 18/19	Harpoceratan
B. 18/19
B. 18/19
B. 18/19
Anguidactylites	B. II
Xeinodactylites	B. 6
Microdactylites	Jet Rock
/ Kry ptodactylites	Grey Shales
1 Tenuidactylites	J} II
/ Athlodactylites	B. 2a
\ Orthodactylites	Transition Bed

The position of the Yorkshire Alum Shale in relation to the Barrington Beds is uncertain ; but as the communis-\ike forms are more or less associated in Yorkshire with hifrons and suhcarinatum, the position may be about as here stated. On the other hand, the Alum Shale beds may be spread over a wider series of the Barrington Beds.

The following is an alphabetical list of the genera of Dactylioceratidae mentioned in the foregoing pages, with references to their positions in the Analysis.

Table XII — Dactylioceratid^ (Generic list)

I.	Anguidactylites	I	16.	Nodicoeloceras	III, B
2.	Arcidactylites	I, B	17-	Nomodactylites	I
3-	Athlodactylites	I, B	18.	Orthodactylites	I
4-	Catacoeloceras	IV	19.	Parvidactylites	II, B
5-	CoUina	V	20.	Peridactylites	II. C
6.	Crassicoeloeceras	IV	21.	Peronoceras	III, A
7-	Curvidactylites	I, B	22.	Porpoceras	III, B
8.	Dactylioceras	II, C	23-	Simplidactyhtes	IV, A
9-	Koinodactylites	I	24.	Spinicoeloceras	III, B
10.	Kryptodactylites	I, A	25-	Tenuidactylites	II, B
II.	Leptodactylites	I	26.	Toxodactylites	II, D
12.	Lobodactyhtes	IV	27.	Vermidactylites	I, A
13-	Microdactylites	I|B	28.	XeinodactyUtes	II, B
14-	Mucrodactylites	II. E	29.	Zugodactylites	II, A
15-	Multicoeloceras	III, B

Emileites nov.. Genotype, E. malenotatus, nov., T.A., PI. DCCII. A race of small sphaeroceratoid cadicones differing from Emileia in suture-line — Li barely comes to the guide-line, while L2 ends well away from it ; in primary ribs being curved, rather small, ending in a small tubercle ; in secondary ribs being curved forward slightly over a well-arched venter and as numerous — 4 primaries give 22 secondaries — as in large examples of Emileia, but more numerous than in small cadicones of Emileia. The place of junction of primaries and secondaries is in 82.

The example figured as genotype is of considerable historical interest. It is one of the two specimens relied on by H. B. Woodward (The Jurassic

7927 SYSTEMATIC 47

June

Rocks of Britain, iv, The Lower Oolitic Rocks of England ; Mem. Geol. Surv., 1894, p. Ill) as proving, in opposition to my statements, the presence of the humphriesianus zone in the Cotteswolds, it being an example of Ammonites humphriesianus recognized by Professor Tate, who said it came from near Stroud. In later years H. B. Woodward most kindly gave me this specimen from Tate's collection. It bears Tate's label " Ammonites humphriesianus, Rodboro'," the well-known locality near Stroud, Gloucestershire. But the matrix shows that Tate must have been wrong in his locality, for it is the unmistakable matrix of the Lower White Ironshot of Dundry, Somerset — a matrix which occurs nowhere else and is quite distinctive. Rodboro' is altogether out of the question. But, even if Tate had been correct in his locality, the specimen would quite fail to prove the presence of the humphriesianus zone in the Cotteswolds, for it is a Sonninian Age form, not a species of the Stepheoceratan { = humphriesianus zone, s.l.). There are no Stepheoceratan strata in the Cotteswolds, and very little of late Sonninian — only at one locality, Cleeve Cloud, near Cheltenham, is there anything later than the date of Witchellia prior to the Parkinsonian (see Table VIII, T.A. V, 74). Tate's specimen is certainly earlier than Witchellia, which equals Upper White Ironshot of Dundry.

Emileia, S. Buckman, 1898, Jur. Time; Q.J.G.S., liv, 456, "Type Emileia Brocchi (Sow.)." Li comes below guide-line and L2 comes nearly to it. Primary ribs are straight, broadly rounded and club- shaped, without tubercles ; secondary ribs, in large specimens like E. brocchi, are about 5 to i, but in smaller cadicones are only about 3 to I. Ribs run nearly straight over a flatly-arched venter. The junction of primaries and secondaries is situated on L2, slightly inside of its median line.

Emileia shows a remarkable series of species from cadicone to sphseroceratoid to flattened serpenticone. The two extremes are repre- sented by Emileia crater, S.B., T.A. CLXIV, and E. catamorpha, S.B., T.A. CDXIV, so unlike that there would seem to be little connexion between them. But about midway lies E. hrocchii, J. Sowerby, M.C. ecu, large figure. Less robust is Am. brocchi ; Waagen, Geogn.-Pal. Beitr., 1867, iii (r), xxiv, 3. Further advance towards serpenticone is shown by Sphceroceras polyschides ; (Waagen) Greppin, (Bajoc. sup. ; Mem. Soc. Pal. Suisse, 1898, xxv. Pis. i-iii, i, 2), possibly more than one species. More decline is seen in Am. polymertis, Waagen (op. cit, p. 605), name given to Am. brongniarti ; d'Orbigny, cxxxvii, i, 2. Near is Am. brongniarti ; J. Buckman (Amm. I.O. ; Q.J.G.S., xxxvii, 1881, p. 64, fig. 5). All these forms which belong to the genus Emileia indicate how E. crater passes to E. catamorpha.

Also may be noticed Emileia macrocephala, Quenstedt sp. (Amm. Schwab. J. LXiv, 13), a very spheroidal form with small umbilicus — its thickness, at 117, being 74 % or about 20 % more than that of E. brocchii. Am. gervillii grandis, Quenstedt (id., LXiv, 9), appears in proportions to come between E. brocchi and E. polyschides of Greppin, but bears rather heavy primary ribs and a suture-line — incompletely shown — which looks somewhat suspicious ; it is not elaborate enough for Emileia.

Similar, not sufficiently elaborate suture-lines are shown by forms figured by Gottsche from the Argentine (Geol. Pal. Argent. ; Palseonto- graphica, Sup. iii. Lief. 2, Heft 2, 1878) as Spheeroceras multiforme (Pis. II, III). They have a remarkable likeness in shape to forms of

48 TYPE AMMONITES— VI June

Emileia from Sherborne and Dundry, which are in the sphaeroceratoid stage ; but the suture-lines of the Argentine forms suggests caution as to definite placing of the South American specimens in Emileia.

Also possibly not an Emileia is the Sphceroceras brocchi figured by Bayle (Explic. Carte, 1878, Lii, i), which, with heavy primary, almost nodate-ending ribs and rather few secondaries, would seem to belong to another stock.

In Part LXIII of this work (Plates DCCXa-d) are given figures of Sowerby's original example of Am. brocchii and, in further illustra- tion, of a specimen from my collection. Sowerby's specimen is almost without test, my example has mainly test. The figures of the Sowerby specimen are from a lithograph plate drawn by Mr. F. H. Michael — intended for the second volume of my ' Monograph of Inferior Oolite Ammonites.' The figures were drawn under my supervision and measurements were carefully checked by me with the original : the suture-line, prepared by me, was placed on stone by Mr. Michael from my tracings and delineations. It is not sufficiently intricate in its inner portion, where the specimen is somewhat worn.

The locality of his specimen is not given by Sowerby in his description of the shell (M.C. ii, 233) ; but it is to be found in the ' Supplementary Index to Vol. II,' by John Farey, p. 250 : it is stated as " Sherborne, [Dorset], presented by the Rev. Mr. Racket." My specimen is from my father's collection. It is marked only " Sh." [Sherborne] : it has the distinctive matrix of the middle part of the Sandford Lane Fossil Bed — see S.B., Bajoc. ; Q.J.G.S., xlix, 1893, pp. 492-494.

Emileia brocchii is the genotype species of the genus. Both these specimens were the original material studied for naming the genus ; but, as it is now necessary to choose one particular example as a standard of reference, the Sowerbian specimen is taken as that standard — the genolectotype — while my specimen thus remains a genosyntype.

It is difficult to delineate the suture-lines of specimens of Emileia an account of their great complexity : it is still more difficult to prepare them adequately for photographing. Not only are the lobules of one suture-line so interlocked that there is danger of running off from one lobe to another, but there is also the danger of passing from one suture- line on to its predecessor or successor — so involved are the patterns. The results given in Pis. DCCXb and d are not so satisfactory as could be wished.

The colomorph, Emileia suhcadiconica (DCCXI), is figured (i) because of its close agreement, if not specific identity with Sowerby's paratype — his small figure — of which it is a syntopite ; (2) for comparison with Emileites malenotatus , PI. DCCII, p. 46.

The two species of Emileia have been dated as brocchii hemera. This is simply for recording purposes : it does not intend to imply that the brocchii hemera is necessarily distinct from other hemerae, like Witchellia, mollis, hebes and, possibly, Shirbuirnia ; but that the evidence fails to say which date should be given. It is not certain that the Sherborne species, E. brocchii, and the Dundry species, E. subcadiconica, are of the same date ; but from the matrices of E. siibcadicona and Emileites malenotatus, it may be surmised that the former is one bed higher than the latter — the former is § i, 5 in Q.J.G.S., lii, 1896, 676, the latter §1, 6.

Emileia, or forms which are like Emileia, have a considerable range in time — they, like Witchellia and Witchellia-iorms, range through most of the later Sonninian from about Shirbuirnia to sauzei : to work out

1927 CHRONOLOGY 49

the identities and dates of such forms may be one of the tasks for the next volume.

Chronology (See Vol. V, p. 78)

In the concluding portion of Vol. v two promises were made for Vol. vi — to present a further study of the strata of the Perisphinctean- Cardioceratan Ages (p. 70) and a detailed section of the Thornford Beds (p. 74). Other matters, however, have claimed attention : the first promise can only be carried out in the present volume, so far as the two following notes on certain clays ; but there is space enough to redeem the second.

Ampthill Clay. The clay of this name around Ampthill, Bedford- shire, which yields Dichotomoceras variocostattim, Buckland sp., is not Corallian as usually stated — that is to say, it is later than Perisphinctean Age. It is of Prionodoceratan Age — towards the lower part of the Kimmeridgian as generally understood. The Dichotomoceras sp. of the North Ferriby Boring — Prionodoceratan i (T.A. iv, 1923, p. 35) — and Dichotomoceras variocostatum are quite possibly the same species.

In connexion with Prionodoceratan may be mentioned something further. Phillips gave Minety as the locality for his Ammonites super stes (Geol. Oxford, 1871, p. 332). This was a lapse for Marston, near Swindon, Wiltshire, which is the locality of his type. In Type Ammonites, Vol. iv, p. 35, line 22 from bottom, ' Minety ' should be corrected to ' Marston.'

Oakley Clay. In the vale east of the Stanton St. John ridge and west of Brill, Bucks, is a clay or clayey marl which has been called Ampthill Clay and correlated with the Corallian. It is of earlier date than Ampthill Clay, but is rightly correlated with Corallian rocks; for it contains many examples of the small Exogyra characteristic of the limestones of Stanton St. John and of Holton, near Wheatley, Oxon. This clay is, and has been exposed in ponds and wells around Oakley, Bucks. It should be distinguished from Ampthill Clay ; therefore may have the name Oakley Clay. Its date is Perisphinctean, antecedens.

Fullers' Earth Rock ; Thornford Beds : These strata are shown in a quarry at Troll, which lies in the triangle formed by the Great Western Railway with the road north from Yetminster : it is 6 furlongs south-west of Thornford Church, and i mile 2 furlongs north of Yetminster Church. The name is spelt Troll in the i inch Survey Map, sheet xviii ; it is sometimes pronounced Trull and sometimes written Trill. The following section was obtained in 1921, with some additions in 1927 :

50

TYPE AMMONITES— VI i""^

§ I — Troll Quarry, Thornford, Dorset (Fullers' Earth Rock = Great Oolite, pars, Thornford Beds, Tuhtan Age)

Thickness

Strata Eeet Ins.

1. Top stone and marl : stone pale straw colour, somewhat

hard. (This bed visible only about the middle

of the west face of the quarry). [Tulophorites] i 8

2. Pholadomya Bed : impersistent stone bed mixed with

marl : stone rather hard, whitish, with occasional pinkish tinge, especially when bruised by the hammer. Large Pholadomyce ; Belemnites occa- sionally in base. [Madarites] i o

3. Marl and stone, mostly marl i °

4. Fairly persistent stone-band 4

5. Rhynchonella Bed: Stone-band, hard, light straw

coloured, shelly ; many Rhynchonellas and broken shell-fragments. [Rugiferites] 3

6. Marl and stone, mostly marl i 3

7. Prominent band of blue-hearted stone, light brown

outside. [Pleurophorites] • • 10

8. Marly stone 4

9. Hardish, blue-hearted stone, brownish outside [Pleuro-

phorites] 5 •

(Beds 7-9 form one prominent blue-hearted

band at north-west corner of the quarry : it is

about I foot 3 inches in thickness)

At north-west corner of quarry, small

temporary excavation : —

10. Marl 5

11. Hard bluish, somewhat argillaceous stone, perhaps the

bed for Sphceromorphites 7

12. Marl.

Samples of the matrices of various stone-bands were brought away and were compared with the matrices of the figured specimens. The result was to give the following possible sequence :

Tulophorites

Madarites

Rugiferites

Pleurophorites

Sphaeromorphites which differs from the sequence given in Vol. iii, Table iii, p. 51. only in the transposition of the two upper terms of the Thornford Beds. But, of course, the sequence now given is based on no more than these comparisons of matrices ; and, as the matrices do not differ sharply and distinctly as in so many other cases— for instance, beds of Inferior Oolite— but are unlike only in minor details, these comparisons may be faulty. Short of being able to be present when the quarry is in work, and then being prepared for days of attendance with very little result, not much more can be done. The beds are very poorly fossihferous so far as ammonoids are concerned ; there was not a single ammonoid to be seen in all the long quarry face, and there were only a few fragments lying about. The dozen or so specimens which I had got together were

1927 CHRONOLOGY 51

the result of some twenty years' collecting by various people — local residents. It is a pity the specimens are so rare, for the ammonoid fauna yielded by Troll quarry is almost, if not quite, unique in England.

The last paragraph was written prior to a visit in 1927. Then I found a body-chamber fragment (S.B. 4751) of Tulophorites aff. prcBclarus (T.A. CCCLXVIII) about the middle of the west face of the quarrj' at the top of the section, close under the soil. My eldest son, who accompanied me, picked up, loose, lying on a bed about the middle of the section, a body-chamber fragment (S.B. 4745) of an Oppelid, somewhat suggesting Ammonites serrigerus ; de Grossouvre (Bathonian ; Bull. Soc. Geol. France, (3) xvi, 1888, in, 3). Its matrix is a sandy marl, light straw-coloured, darker where it has been weathered. It may possibly have come from bed 3 or 4. Its preservation is poor, but it is valuable as being a new find for the beds of Troll, or even for any English Great Oolite strata.

With regard to the highest bed of the Troll section, this seems to thicken southwards, where the quarry is grass-grown, and there appear to be traces of a clay above it.

ZiGZAGiCERATAN. On the way by road to the Troll quarry, at the south-west corner of Clifton Road, where it branches off from the Bradford Abbas- Yetminster road (Clifton Maybank parish), about one furlong south of Bradford Abbas Vicarage, a small road-widening showed yellowish stone-beds with a Zigzagicerate (S.B. 4746). There is reason to suppose, owing to dip of strata and that Hke beds are not shown in the Bradford Abbas quarries, that these roadside beds are higher than those of the Vicarage Quarry, Bradford (Q.J.G.S., xlix, 1893, p. 486, § III). Therefore the reason why the Zigzagicerate fauna, so characteristic for the top beds of Inferior OoHte of Crewkeme Station, Somerset, Broad Windsor and Bridport, Dorset, had so very rarely been obtained from Bradford, was that the true bed of Zigzagicerates failed in exposure at any of the Bradford quarries : they were all too low. It is necessary to cross the river into Clifton Maybank parish to strike them.

The Clifton-Road beds are to be dated as Zigzagiceratan, pollubnim. Therefore the Bradford " top beds " are presumably ^xe-pollubrum, not fusca. The Clifton beds are about a mile north of Troll quarry, and some 20 feet lower, according to ground level, with something more to be added for dip. What the intervening beds are like may be gathered from a faulted piece of " Fullers' Earth " on the west end of the cutting of the Southern Railway, east of Bradford, and from beds of Lenthay Common about two mUes to the east.

Acknowledgment

To the subscribers for their continued kind support and to those who have helped this work by contributions of MS. or illustrations, by loans of specimens, books etc., by giving facilities for study, and in numerous other ways, the author desires to express his heartfelt thanks.

52

TYPE AMMONITES— VI

June

Parts LI 1 1 (20 plates) LIV (20 plates) LV (16 plates) LVI {16 plates)

LVII (i6 plates)

LVIII (16 plates)

LIX (16 plates) LX (16 plates)

LXI (20 plates)

LXII (16 plates)

LXIII (20 plates)

LXIII A

Pages

5-16

17-20

21-24

25-28 29-36

37-42 43-46

Publication Details

Plates DXXVIIlA, DLXXVII-DXCII DXCIII-DCVII DCVIII-DCXXI CCCLIIIc, D, DXXa, b

DCXXII-DCXXXI CCCLIV [a], DXCa, b, c, DCII [a],

DCXXXII-DCXXXIX CDXII*, CDLXXXII*,

DXXXVII*, DCXL-DCLII DCLIII-DCLXIV CXXXVIIIc,

DCLXV-DCLXXVII DLXIlA, B, DLXXXc

DCLXXVIII-DCXCIII LXVIIlA, DIIa, DVIa,

DCXXXIXd, DCXCIV-DCCV CXXXVa, CLVIIa,

DCCVI-DCCXVII

47-61

	Dates
31. 19, 30. 25.	VIII, X, XII, 11,	1925 1925 1925 1926
30.	IV,	1926
28,	VI,	1926
27. 26,	VIII, X,	1926 1926
31.	XII,	1926
28,	II.	1927
2,	V,	1927
30.	VI,	1927

Addenda, Corrigenda

Page 25, line 27, for ' fauna ' read ' faunas ' ,, 1. 37, for ' the ' read ' that '

,, 27, 1. 10, for ' correllate,' read ' correlate '

,, 27, 1. 18, for ' Pruovst ' read ' Pruvost '

,, 40, 1. 18 up, for ' has ' read ' have '

,, 42, 1. 5, for ' acauthus ' read ' acanthus ' Plate CCCLIV, heading, to number add ' a '

,, DXXVIIIa, 1. 5, for ' Sonnites ' read ' Sonninites ' DLXXX (part 61), to number add ' c ' DXCIIa, 1. 3, for ' pres ' read ' pres."

,, DCII (Part 57), to number add ' a '

„ DCXVIa, b, 1. 3, for ' ES ' read ' EL.'

,, DCXXb, 1. 3, for ' 24 X ' read ' 24+ '

„ DCXXVIIlB, 1. 4, for ' (ES, O), ES, O' read ' (EL, O), EL, O '

„ DCXXXV, 1. I, for ' X 56 ' read ' x 0.56 '

Synopsis of Volume VI

Pages I — 52.

Plates LXVIIlA, CXXXVa, CXXXVIIIc, CLVIIa, CCCLIIIc, D, CCCLIVa, CDXII*, CDLXXXII*, DIlA, DVIIa, DXXa, b, DXXVIIIa, DXXXVII*, DLXIIa, b, DLXXVU-DCCXVIIa, b (DLXXXa-c, DXCa, b, DXCIa, b, DXCIIa, b, DXCIIIa, b, DXCVa, b, DXCVIIa, b, DCIIa, DCVa, b, DCVIa, b, DCXVIa, b, DCXXa, b, DCXXVIa, b, DCXXVIIIa, b, DCXXXVIIIa, b, DCXXXIXa-d, DCLIIIa, b, DCLXa, b, DCLXIa, b, DCLXIIlA, b, DCLXVIIIa, b, DCLXXIVa, b, DCXCIa, b, DCCVIa, b, DCCXa-d, DCCXIIa, b)

Index, pages 53 — 61

Title and Contents-pages of Parts LII-LXIIIa

1921

INDEX

53

Ammonites baculatus

OLXXXI

Index

Pages c~ Plates

Abnormal side dcxli

acceleration 15

Acknowledgment 51

acmic characters 22

actinophora dclxxxix

Addenda 52

adricus dclxix

^goceras angulatum 13

Agassiceratan 24

Age 34. 35. 45. 46

— names 39

Ages 28

albidus dclxxxvii

AUovirgatitan . . . . dcxxxvii Allovirgatites . . . . dcxxxvii,

DCXXXVIII, DCXCII

distans, tutcheri, woodwardi

— tutcheri 9

— • versicostatus 9

— woodwardi 9

alsaticus dxxviii a

Alum Shale 45, 46

Amaltheian 23

Amaltheus cordatus . . Dcxxxiv

Ammonites acanthopsis . . . . 42

— acanthus 42

— a;quistriatus 41

— angulatus 43

— anguliferus 12, 13

— annulatus . . 41, 43, Dec

— — lectotype Dcc

— annuliferus 42

— • arenatus Dccix

— armatus 44

— attenuatus dclv

— bakeriae Dcxv

— banksii dclx

— biplex 14, 38, Dciii, DCLXXiii,

DCLXXVI, DCLXXVII

— bononiensis DXCI, Dcxxi

— braunianus 44

— brocchii . . 47, 48, dccx,

DCCXI

• — brongniarti 47

— bucklandi 11

— — costaries . . dclxxviii

— clevelandicus 12

— communis 41. 43

— cordatus . . . . dcxxxiii

— — excavatus . . . . dcciv

— crassus 42-44

— dayi 42

— decipiens . . . . dlxxxix

— delicatus dclvi

— — lectotype . . . . dclvi

Pages &■ Plates Ammonites desplacei 44

— devillei. . . . dclii, dclxiv

— discus Dvi

elegans. . eudoxus excavatus fibulatus

— fluctuosus . .

— gervillii grandis

— giganteus . .

— gigas . . . .

— gowerianus . . — • gulielrai

— hildensis

— holandrei . .

— humphriesianus

— — crassicosta

— intertextus . .

— kapffi .

12, DCXLIV

DLXXXVII

DCXXX, DCXXXV

44, DCLXXXIII,

DCCI

DCXV

. . . . 47

5, DXCIl

. . . . 26

DCXIV

DLXXXVI

DCLXVII

• • 42. 44

DCCIX

DCCXII

DCLXII

DCXVII, DCXVIII

kimmeridiensis 38, dclxxiii

koenigi dcxlv

kurrianus . . . . Dcxcviii

laeviusculus . . . . dclxxxvii

lonsdalii dii

moorei bcxLiii

mucronatus 43

murchisonae Dcx

obtuSUS . . DLXXVII

nanus dclxxix

obtusus II

pallasianus . . . . 13, Dcxciii parkinsoni longidens dlxxxii pectinatus cccLiv, dci, dcii,

DCLII, DCCV

planicosta Dccvi

polymerus 47

pseudogigas . . . . Dccxvii

— identity 26

quadratus dcxix

ragazzonii 43

raristriatus 41. 42

raquinianus 43

redcarensis 11, 12, 13, dcviii

— lectotype 13

rotundus 13, cccliii, dxc,

DCIV, DCVII, DCXXXIX, DCLXXIV

sedgwickii Dxcvii, Dxcvill

semicelatus 41

serpentinus . . . . cxxxviii

serrigerus 51

skidegatensis 38

subarmatus 42

superstes 49

54

nPE AMMONITES

June

Pages &■ Plates Ammonites tenuicostatus 41, cLVii

— triplex Dcv

— truellei gracilis . . dlxxxv

— tumeri II

— turriculatus 44

— variabilis . . . . Dxxviii a

— vermis . . • • 42, Lxviii

— vertebralis . . . . Dc, dcxxvii,

DCXXXVI, DCXLVIII

■ — ziphus Dcxxxii

Ammonoid Shales 33

— sequence 29

Ammonoids, Hartwell Clay, local 25

— lack of identity 25

Ampthill Clay 49

anacanthum dcciii

Anacardioceras . . . . dcxxviii,

DCXXIX, DCXXX, DCXXXV, DCXCI

delicatulum, delicatum,

expositum, secundarium, serrigerum

anagenetic 23

Anakosmokeras Dxcvu

effulgens

Analyses 16

Analysis, generic 45

Ancyloceras calloviensis dxxxvii

sp. . . DLXXXIII, DLXXXIV

Anguidactylites 41, 44

anguiformis

anguiformis 41

Angulaticeras 24

angustilobatum , . . . Dcxcvii

annulatum dcc

Anolkoleiites dclix

plenus

antecedens dcl

aplanatum dcxl

Aposphinctoceras 29

— genotype 25

— spp., ribbing 29

— ■ allcsburiense 25

— decipiens 25, 26

— hartwellense 25

— variabile 25

appropinquans . . . . dclxxxi

Arcidactylites 44, dclvii

arqus

— ■ arcus 44

arcus DCLVII

arenatus dccix

Argentine 47

Athlodactylites 43

atlileticum

attenuatus dclv

audax Dccxvn

Aulacosphinctes contiguus dcxcii Aylesbury Area 27

— — sequence 27

bajociensis dccxiii

Bajocisphinctes dccxiii

bajociensis

banksii dclx

Barrington Beds .. .. 41, 45, 46 Bather, Dr. F. A., on Genotypes 5, 6

Bed, or Date 45, 46

Behemoth lapideus 37

Behemothan 26, 28

Pages &■ Plates

biformis dcv

bifurcus dclxxvi

Bigotitean venter.. .. 21, dcxxii

Bigotites dcxxii

trifurcatus

— thevenini dcxxii

Bikosmokeras. . . . Dcxxv, dclxi

deficiens, gemrainatum Binatisphinctes Dcxv

fluctuosus

binodulatum dccvi

Biplicate Ammonites 34

Bituberculate Xipheroceras dccvi

Blake, J. F 13

Boulonnais 25

Bradford Abbas 51

Bradypalingenesis . . . . Dxx

Brasilia decipiens dlxxix

braunianum bed 45

braunianus dclviii

Bredyia dlxxvii

crassornata

Bridport 51

Brill 49

Broad Windsor 51

brocchii dccx

— hcmcra 48

Buckinghamshire 27, 28

Bucks, sequences 27

Burtonia dlxxvii

ca;mentarius dclxxvii

Caloceras aplanatum . . . . dcxl calloviense . . . . ' . . dxxxvii

Calvert Beds 20

campylus dlxxxiv

Cardioceras . . . . dcxvi, dcxxxiii,

Dcxc, dcciii anacanthum, costcllatum, costicardia, quadrarium Cardioceras cardia . . dcxxxiii

— cordatum dcxvi

— excavatura Dxcix,

DcxLVii, bcxci

— maltonense dcxxix

sp DCCIII

— suessi DCXXVIII

— vertebrale dcxc

Cardioceratan Age 49

cariniferum dcxxvii

Catacoeloceras 44

— confectum 44

catagenetic 24

Cement Shale 45

Chapmans Pool 27, 30

— — sequence 31

Chatwin, C. P 27

Cheltenham 47

Christian Malford Beds . . . . 20 Chronology 28

— and correlation 35

clausiprocerum dxcv

Cleeve Cloud 47

Clifton Jlaybank 51

Clydoniceras DVi

discus

Coeloceras annulatiforme . . . . 42

— crassum 42

— crosbeyi 42

— fonticulus 42

1927

INDEX

55

Pages (S- Plates Coeloceras foveatum 42

— marioni 41

— puteolus 44

— (Dactylioceras) anguinum 41 CoUina 44

— gemma 44

— linac 42

Colomorph Dccxi

communis 43, Dccvii

consimilis 42

Convergence 24

Corallian 49

comutifer dcii

Coroniceras keelingi . . • . dcliii Correlation and Chronology . . 35

Corrigenda 52

Cosmoceras duncani . . . . dcxxv,

DCXXVI, DCLXI

Cosmoceras parkinsoni var. rare-

costatum Dcxii

costate stage 44

costellatum Dcxvi

costicardia dcxxxiii

costigera dccxvi

costigerum dclxxxvi

Costigrammoceras . . . . dclxxxvi costigerum

costulosum Dcxxxvi

cowleyensis dclxiii

Crassicoeloceras 42

pingue

crassoides 42

crassomata dlxxvii

Creamy Limestones . . . . 26, 27

DCCXVIII

crenatum dclxv

Crendon Clay 27, 28

Crendon Sands 36

Crendonina Dcvii

subrotundata

Crendonites 29

Crenilytoceras DCLXV, dclxxx

crenatum, formosum

crenulatus Dcxvni

Cretaceous oxynotes 24

cretarius dcxxi

Crewkeme Station 51

Crickmay, C. H 10

crytogenetic 23

cunctator Dcvi

curticomutus Dcxiv

curvicosta .... 43, Dccvni

Curvidactylites . . 43, Dccvm

curvicosta Cymatosphinctes cymatophorus. . 8

cyphus DLXXXiii

"^actvlioceras dclvi, dcc

'"'" delicatum

•• 43

— delicatum . .

— helianthoides 4 1 , dca, —

— tenuicostatum 41

Dactylioceratidae 44

Pages &■ Plates Dactylioceratida; analysis . . 45

— genera 41

— generic list 46

Date, or Bed 45, 46

Davies, Prof. A. Morley . . . . 22

deficiens dclxi

Defossiceras 24

Degenerate suture-line. . . . dccix

degeneration 24

delicatulum Dcxxxv

delicatum . . . . Dcxxx, dclvi

depilata dcx

Deroceratan 24

Development, morphic . . 17, 18,19

— order 21

Dichotomoceras dichotomum . . dcl

— sp 49

— variocostatum 49

Dichotomosphinctes dcl, dccvi

antecedens, holtonensis

directus DCLIV

discus DVi

distans dcxxxviii

dolium DCXLi

Dorset Coast Strata 30

Duraortieria . . . . 24, dclxviii

rhodanica

— rhodanica . . . . dclxviii

Dundry . . •. 47

Dundryites dclxxxvii

albidus

Dutertre, Dr. A. P 25

Echioceras sp dcix

effulgens Dxcvii

Emileia 13, 40, 48, dccx, dccxi

brocchii, subcadiconica

— brocchi 47

— catamorpha 47

— crater 47

— macrocephala 47

— polyschides 47

— subcadiconica 48

Emileites 46, dccii

malenotatus

— malenotatus . . . . 46, 48

epacmic 23

Episphinctoceras 25, 29

— inflatum 28

expositum Dcxxviii

Euagassiceras 24

Eudmetoceras 24

Euechioceras cdlxxxii

nobile

— angustilobatum . . dcxcvii

— nobile cdlxxxii

Exogyra 49

— spiralis 32

falcata dclxxxviii

falcula dclxxxii

Fauna 34

' -onetition 22, 27

' ' - — _^CLXXXIII — '^"CU^

Ircij

Fullers' Eartn

56

TYPE AMMONITES— Vt

June

Pages 6- Plates Fullers' Earth Rock . . . . 49, 50 Galbanites dcxxi

cretarius Galecardioceias . . . . dcxlvii

galeiferum

galeiferum dcxlvii

Galilaeites Dcxiv

curticornutus Gelasinites Dxcni

gelasinus

gelasinus Dxciii

geminatum dcxxv

Genera, differences 34

generic analysis 45

— list, Dactylioceratida; . . 46

Genoholotype 6

Genolectotype 5, Dccx

— Emileia 48

Genosyntype, Emileia 48

Genosyntypes 6

Genotype 5

— Emileia 48

Genus 45. 46

Geological Sequence . . . . 45, 46

gibbosus Dcxxxix

giganteus ammonites 36

Gigantids, descent of 15

Gigantitan 26, 28

Gigantites . . . . 5, 26, Dxcii

pachymeres

Gigantitid-beds 27

glauca Dxciv

Glauconitic Bed . . . . 27, 28, 37

— Sands 26

Glottoptychinites Dccxvii

audax

glyptum DcxLvi

Gonoxyites Dcxin

limosus Gowericeratida; . . . . 20, 21, 23

gracile dlxxxv

Grammoceras soloniacense

DCLXXXIV

— — lectotype dclxxxiv

— striatulum . . . . dclxxxvi grandis 28

— hemera 28

Gravesia beds 27

Great Oolite 49

— — • strata 51

Grey Shales 46

Gulielmiceratidae 20, 21

Gulielmina dlxxxvi

quinqueplicata Gulielmites dxcviii

sedgwickii Gyromegalites Dcxx

polygyralis Hammatoceras 24

— dolium DLXxviii, dcxli

Haplopleuroceras 23

Harpoceras dclxxxii

falcula

— falciferum . . . . dclxxxii

— sutneri . . dclxxxviii,

DCLXXXIX

Harpoceratan 46

Pages &■ Plates Hartwell Clay 25, 28

— — correlation 40

— — date of 27

Hartwell (Crendon) Clay . . 28, 29 Hartwellia hartwellensis . . . . 40

Haugian 45

hebes hemera 48

helianthoides 41, dcxcix

Hemera 28, 34, 35

Heterogeneity 22

hildense dclxvii

Hildoceras . . dclxvii, dclxxxv

hildense, semicosta

— semipolitum . . dclxxxv

Hildoceratan 45, 46

Hildoceratoides . . . . cxxxviii

serpentinus

Holcosphinctean 36

Holcosphinctes 14, 25, 29, dclxxiii

kimmeridiensis

— flexicostatus 14

— pallasioides . . . . 14, 28, 38

Holotype 6, Dccxv

Holton 49

Holworth 37

Homechioceras DCix

simile Horn . . Dci, dcii, dcli, dclii

— broken and repaired dclxiv

Horns, incipient Dccv

Hounstout Cliff 3°. 3i

— • sequence 31

humphriesianus zone 47

Hydrostratites . . 29, dclxxvi

bifurcus infiatum 28

— hemera 28

infrequens DCiil

Inner whorls clvii

intertextus dclxii

intricatum cxxxv

Ironshot 47

Jet Rock 46

kakomorph dcxli

keelingi dcliii

Kellaways Clay 20

Kellawaysites . . . . dlxxxvii

multicostatus

Kellaways Rock 20

Kepplerites 20

Keratinites . . dci, dcii, dcli,

dclii, dclxiv

comutifer, keratophorus, naso, nasutus, proboscide

keratophorus dci

Kerberites 34, dxx

kerberus Kerberites kerberus . . . . 15, 26

kerberus dxx

Keynshamites dcliii

keelingi ICiliania dcx

depilata

Kimmeridge Clay 39

Kimmeridgian 25, 49

— Mddle 27

kimmeridiensis . . . . dclxxiii

1927

INDEX

57

Pages &■ Plates ICitchin, Dr. F. L. . . 13, 27, 40 Koinodactylites . . . . 43, Dccvn communis

Kosmoceras 20

Kosmocerataceae 20, 23

— phenomena of 22

Kosmoceratan . . . . 16-20, 22 Kosmocerates 16

— analysed . . . . 17, 18, 19

— development . . 20, 21, 22

— stratal distribution . . . . 20 Kosmoceratidae .. .. 16, 20, 21

— characters 22

Kosmoceratids 23

Kryptodactyhtes 41

semicelatus

kuklicum dcxxvi

Kuklokosmokeras dcxxvi

kukhcum Kumatosteplianus Dccxii

perjucundus

laboratus dcxlv

Labyrinthoceras cxxxv

intricatum

Lamplugh, G. W 13. 27

La Rochette 25

lateral area (ornament) . . . . 19

Lectogenotype 5

Lectotype 6, dclvi

— A. raristriatus 42

— A. redcarensis 13

— G. soloniacense dclxxxiv • — L. svevum . . . . dcxlvi

— Oppel's, A. annulatus . . dcc

— R. pseudo-yo . . dclxxii Leptechioceras Dcxcvi

planum

— aplanatum . . . . cdlxxxii

— planum . . . . dcxcvi Leptodactylites 42

leptum

leptum 42

Leucopetrites 34, 37, dclxxvii

cacmentarius

— leucus 36

Lenthay Common 51

liraosus Dcxiii

Lingula ovalis . . . . 33, 34, 37

— shales 33

Liparoceratan 24

Lithic conditions, local . . . . 39

— likeness 36

Littleworth Lydite Clay 25, 27, 28, 37

— Sands 28, 36

lobatura 42

Lobodactylites 42

lobatum Loboplanulites Dxcvi

longilobatus L2, double and single . . . . Dccxil

Long Crendon 27, 28

• — — chronology 35

— — non-sequence . . . . 37

— — sequence 27

— — stratal thicknesses . . 35

longidens dlxxxii

longilobatus Dxcvi

lonsdalii dii

Lower White Ironshot 47

Pages &■ Plates Ludwigia romanoides . . . . dcxxxi

Ludwigian 24

Lunuloceras on, dcxlvi

lonsdalii, glyptum

— svevum . . . . dcxlvi

— — ■ lectotype . . dcxlvi

lydianites DCiv

Lydistratites . . . . 13, 14, 29, 34

cccliii, dcv, dcvi, dcxxxix, dclxxiv biformis, cunctator, gibbosus, lyditicus, trigonalis

— biformis 14

— cunctator 14

— gibbosus Dxc

— lyditicus 14

— stage Dcxx

— virgatite 15

Lydite Bed 27-29

Lydite (or Pebble) Bed . . . . 37 lyditicus 28, cccliii

— hemera 28

Lytoceras cornucopia . . . . dclxv,

DCLXVI, DCLXXX, DCLXXXI

Lytocerates 23

Maconiceras dclxxxiv

vigoense

Macrocephalitan 17-19

Madarites 50

magnicostation 15

malenotatus Dccii

Marston 49

Massive Bed 37

Metechioceras dcxl

aplanatum

metorchion dclxvi

Michael, F. H 48

micracanthicum dcxi

Microdactylites . . . . 44, dclv

attenuatus

— attenuatus 44

Micromphalites dcxliv

oxus micromphalus stage . . . . dcxliv

Minety 49

moderatum DC

mollis hemera 48

Mouth . . . . cxxxv, Dccviii

— , see Horn Mucrodactylites 43

mucronatus

mucronatus 43

Multicoeloceras 42

multum

— multum 42

multicostatus . . . . dlxxxvii

multum 42

nanus dclxxix

Nahtlobe 8

Nahtlobus 8

naso DCLil

nasutus dclxiv

Nautilus anguinus 41

Neaverson, Dr. E.

9, 14, 15. 27, 28, 30, 37

— Aposphinctoceras . . . . 25

— correlation 28

— Memoir, date 26

nobile cdlxxxii

58

TYPE AMMONITES— Vt

June

Pages &■ Plates

Nodicoeloceras 4^

crassoides

— crassoides 4^

Nomen nudum i°

Nomodactylites 43

temperatus

— temperatus 43

Non-sequence 20, 28

— , Long Crendon • . • • 37

Oakley Clay 49

Odontolkites dlxxxii

longidens

Oil Shales 3°

Olcostephanus pallasianus . . . . 25

— triplicatus Dxx

ontogenetic '^

Oppel, A 13

Oppelaceae 22, 23

Oppelia fusca dcxiii

— subradiata dclxx

— umbilicate sp dclxxi

Oppelina . . ■ • dclxx, dclxxi

pulchra, umbilicata Orbicula humphriesiana . . ■ . 37 Orbiculoidea glabella 37

— humphriesiana 37

— smooth sp 37

Orcholytoceras dclxvi, dclxxxi

appropinquans, metorcliion

Ornament i*^

Orthodactylites . . . . 14. dcliv

directus

— directus 44

Osses Ed Dccxvii

Ostrea, spat dccxii

Otoites 13

Otosphinctes dcxlix

ouatius

ouatius dcxlix

Over Winchendon, quarry dccxvii

Oxford (north) Clays 20

Oxfordshire 27. 28

— sequences 28

OXUS DCXLIV

oxynotes 24

Oxynoticeras 24

Oxynoticeratan 24

Pachycardioceras . . . . Dcxxxiv

robustum

pachymeres Dxcii

pachypleura Dcxii

pallasianus Dcxciii

Pallasiceras . . 13, 29, 34, dxc, dciv

lydianites, rotundum

— gracile dxc

— lydianites 14

— ' pallasianum ' 13

— pringlei 24

— — , genus 25

• — rotundum dxc

— ultimum 14

pallasioides 28

— hemera 28

Palingenesis I5

Paltopleuroceras 23

Papilliceras DCXi

micracantliicum

Pages <&■ Plates Paracardioceras . . • . dlxxxviii

persecans

paracmic characters 22

Paramatoceras 24, dcxli, dlxxviii

dolium, rugatum Parapatoceras . . . . dxxxvii

calloviense

Parapatoceratida; 20-22

Paravirgatitan . . . . 25, 26, 28 Paravirgatites . . . . 29, 34, Dciii

infrequens

— dcsideratus 14

— infrequens •■ 14

— kimmeridgensis 15

— paravirgatus . . . • 14. '5 paravirgatus 28

— hemera 28

Parkinsonia dcxii

pachypleura Parkinsonian . . • • ■ • 22, 23, 47

— venter 21

— stage 23

Parkinsonidas 22

parvicostation " I5

Parvidactylites 43

parvus

parvus 43

Pavlow, Dr. A 3^

Pectinatites . . . . cccLiv, dccv

pectinatus, scalariformis pectinatus 28, cccLiv

— hemera ■ 28

Peltoceratoides dclxxi

intextus

Peridactylites 4*

consimilis

— consimilis 42

Perisphinctean Age 49

Perisphinctes . . . . dclxiii, dccxiv

cowleyensis, tumulosus

— auriculate DCXLIX

— devillei dcvi

— dorsoplanus . . Dcxxxviii

— gorei 38, Dcxx

— martinsi . . . . Dccxni

— orientalis . . . . dclxiii

— pallasianus 3*

— parandieri dccxiv, dccxv

— — holotype .. .. dccxv

— patina dxcvi

— rotundus . . . . Dcxxxvii

— scythicus dclxxv

perjucundus dccxii

Peronoceras 44, dclxxxiii, dcci

fibulatum, praepositum

— praepositum 44

persecans dlxxxviii

phaulomorph 13

phaulomorphus dcxliii

Phaulozigzag dcxliii

phaulomorphus

Pholadomya Bed 5°

Phyllocerates 23

Pictonia Dccxvi

costigera

-— tenuis dccxvi

pingue 42

1927

INDEX

59

Pages &■ Plates Plagiamites . . dlxxxih, dlxxxiv

campylus, cyphus Planifastigites dlxxix

platys

planum dcxcvi

Plasmatites dcxviii

crenulatus Plasmatoceras dcxvii

plastum

plastum DCXVII

Platyharpites . . . . dcxcviii

platypleurus

platymorpha dlxxx

platypleunis dcxcviii

platys DLXXIX

Plenus DCLix

Plesechioceras dcxciv

typus

— delicatum dcxciv

Pleurechioceras dcxcv

typicum

— deciduum dcxcv

Pleurophorites ^o

polygyralis Dcxx

Polymegalites dxci

polypreon

Polymorphitan 24

polypreon dxci

Porpoceras -2

— crassiusculum at^

— verticosum ."2

— vortex ,2

— vorticellum .2

Portland Sands 30, 39

— Stone ^g

Pbrtlandian 24, 26

— correlation '25

— Kimraeridgian 27

— Lower Stone-Beds . . . . 28

pnepositum dcci

prefibulate stage dcci

Prepapillites dccix

arenatus Primarietites dclxxviii

primitivus Primary ribs, differences . . . . 29

primitivus dclxxviii

Pringle, J I3_ 27

Pri.nglei 24, 25, Dcxii

Prionodoceras dcciv

truculentum

Prionodoceratan Age ^g

proboscide dcli

Proplanulitan . . . . 17-19, 22 Proplanulites dcxlv

laboratus

— laboratus dcxlv

Pruvost, Dr. P '27

pseudogigas 26

pseudoprocerum . . , . Dcxxin

Pseudovirgatitan 25, 28

Publication Details '52

pulchra dclxx

Punct«E in test Dxciii

Purbeck, Isle of ^o

— — — I Chronology . . . . 35

— — — . sequence . . . . 34

— — • — , stratal names . . 35

Pages &■ Plates

quadrarium Dcxc

quadratum Dcxix

quinqueplicata . . . . dlxxxvi

rachis dcxlviii

Re-appearance 23, 24

redcarensis Dcviii

Reineckeian . . . . 17-19, 22, 23 Reineckeia multicostata dlxxxvii

Reineckeida; 21

rhodanica dclxviii

Rh\TichoneIla Bed 50

— loxia 37

— portlandica. . . . 32-34, 37

— subvariabilis . . . . 34, 37

Ribbing 29

Ribs and Photographs . . . . 29 Ringsteadia . . dclxxii, dlxxxix

frequens, sphenoidea

— pseudo-yo . . . . dclxxii

— pseudo-yo, lectotype dclxxii

robustum Dcxxxiv

Rodboro' .j

rotundum dxc

— ^f'ls 27, 37, 38

— Clays 33

— nodules 31

Rubble Beds 27

™ber DcxLii

Rubnieutes dcxlii

ruber

rugatum dlxxviii

Rugiferites ^o

Runcination order 21

Russia, giganteus beds . . . . 36

Russian Ammonoids 36

Saccocoma horizon aq

Sagitticeras dc, dcxxvii

cariniferura, moderatum

St. Albans Head ,1

Salfeld, Dr. H "38

Sands 27, 28

Sandy Marl dccxvii

scalariformis dccv

Schlotheiraia 24, dcviii

redcarensis

Schlotheimian 24

Schuchert, Prof. C, genotype . . 6 Scoticardioceras dxcix

scoticum

scoticum DXCIX

scythicus dclxxv

secundarium Dcxxix

sedgwickii dxcvih

semicelatus .1

.semicosta dclxxxv

Sequence, Dactylioceratidsc 45, 46

Sequences 27, 28

serpentinus cxxxviii

.serngerum dcxci

Shell Bed 26, 38

Sherborne ' .g

Sherbomites dclxix

adicrus

Shirbuimia hemera 48

Shotover 28

— Brickyard 27, 28

— Dogger Beds '40

— Fine Sands , , . 28

6o

TYPE AMMONITES— VI

June

Pages &■ Plates Shotover gap 38

— Grit Sands . . . . 27, 28

— Sands 25-29

— sequence 28

Shotoverites . . . . 15, 25, dlxii

pringlei

— pringlei . . . . 9. 15. 24. 25

— reductus 9, 15

— suture-lines 9

Sigaloceras, development . . . . 21

simile DCix

simplicicosta 43

Simplidactylites 43

simplicicosta

— simplicicosta 43

Simpson, M 12

simulans Dcxxxi

skipping 21

Sonninia dccix

— adicra dclxix

— mammillate . . . . dcxi Sonninian 23, 24

— strata 47

Sonninites dcxxxi

alsaticus, simulans Sonninites (Sonnites) . . Dxxviii a

South American 48

Spath, Dr. L. F lo, 13, 21

Spha;roceras brocchi 48

— multiforme 47

— perexpansum . . . . cxxxv

— polyscliides 47

Sphaeroraorphites 50

sphenoidea dclxxii

Sphinctoceras crassum 9

— distans 9, dcxxxviii

— — to Allovirgatites . . 10

spicatum 42

Spinicoeloceras 42

spicatum

Stanton St. John 49

Stenechioceras . . . . Dcxcvii

angustilobatum Stephanoceras annulatum . . . . 41

— clausiprocerura . . . . Dxcv

— commune . . 43, 44, dchv

— crassum 42

— fibulatum andreae . . . . 44

— pseudoprocerum. . .. Dcxxiii • — raquinianum . . . . 42, 44

— subarmatum 42

— subprocerum . . . . Dcxxiv Stepheoceratan 22

— strata 47

Strata 34

— , absences of 40

Stratal names 35, 36

— — , (I. of Purbeck) . . 35

— thicknesses 35. 36

Strigoceras dlxxxv

gracile

Stroud 47

Subbigotitean venter . . . . Dccxiii

subcadiconica Dccxi

subcarinatum bed 45

subprocerum dcxxiv

subrotundata . , dcvii

Pages &■ Plates

Suspensive lobe 8

Suture-line 7

— — degenerate . . . . dccix

— — , recording . . . . 8

— — uncompleted . . dlxxx b

Swindon Clay 27

Swindon, chronology 35

Swindon, gap 37

Synopsis 52

Synthetograph 12

Syntopite 48

Systematic 7

Tate, R. 47

Teloceras dclx

banksii Teloceras-Stepheoceras stage . . 23

tenuicostatus clvii

Tenuidactylites . . . . 14, clvii

tenuicostatus Test with puncta; . . . . Dxciii Thame Sands. . . . .. . . 27, 28

— — thickness of . . . . 63

Thomford Beds 49, 50

Toricelliceras 20

Toxodactylites 42

toxophorus

— toxophorus 42

toxophorus 42

Tragophylloceras . . . . dclxxix

nanus

Transition Bed 46

trifurcatus Dcxxii

trigonalis dclxxiv

Trill 49

Troll 49, 51

Trophonites pseudogigas . . . . 26

truculentum dcciv

Trull 49

tuberculate stages 23

Tulophoritcs 50

— afi. praeclarus 51

tumulosus Dccxiv

tutcheri Dcxcii

Type-species 6

typicum dcxcv

typus Dcxciv

umbilicata dclxxi

uncoiled forms 22

Upper Lias 45

— — , Barrington . . . . 41 Upper White Ironshot . . . . 47 Upper Witchett . . . . dccxvii

variabilis bed 45

Venter 21

— bigotitean dcxxii

— characters 16

— (ornament) 18

— • (shape) 17

— subbigotitean . . dccxiii Vermidactylites . . . . 42, lxviii

vermis

vermis 42, lxviii

Vertebriceras . . Dcxix, Dcxxxvi,

DCXLVIII

costulosum, quadratum, rachis

— quadratum dcxix

— rachis . , . , . , ocjfLviij

1927

INDEX

6i

Pages &■ Plates

vigoense dclxxxiv

Virgatitan Age 34

— beds 37

Virgatite ammonoid 32

— stage . . . . 15, Dxx, Dcv Virgatites . . 34, dclxxv, dcxciii ,

pallasianus, scythicus

— pallasi 32

— scythicus 32

Virgatosphinctoides grandis . . 28

Volgian stage 34

Waddington, C. H. 30, 33, 34, 36 Wheatley 28, 49

— Sands 27, 28

— sequence 28

Wheatle>ites 8, 25

— opulentus 9

— pectinate 15

— pringlei . . 24, 25, dlxii

— — Pruvost . . . . DLXII b

— rarescens 9

— reductus 15

— — to Shotoverites . , . . 9

— suture-lines 9

— tricostulatus 9

White Ironshot 47

White Septarian Band .... 38

Pages &■ Plates Witchellia . . 48, dlxxx, dxciv,

DCXLII, DCLXXXVIII

actinophora, falcata, glauca, platymorpha

— date 47

— hemera 48

— Iseviuscula dcxlii, dcxlix

Sp DLXXX

— spinous DXCIV

— sutneri . . dlxxx, dxciii,

DCLXXXVIII, DCLXXXIX

Woodward, H. B 14, 47

Xeinodactylites .. .. 41, Dcxcix

helianthoides Xipheroceras . . . . Dcxxxii, dccvi

binodulatum, ziphus

Young & Bird 11

Zigzagiceras Dxcv, dcxxiii, dc.xxiv

clausiprocerum, pseudo-

procerum, subprocerum

Zigzagiceratan 51

Zigzagicerate 51

ziphus dcxxxii

Zugodactylites . . . . 44, dclviii

braunianus

— braunianum 44

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TYPE AMMONITES-VI

BY

S. S. BUCKMAN

With Photographs

by

J. VV. TuTCHER, H. G. Herring, b.m.(n.h.)

and The Author

Part LIII 20 Plates

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CONTENTS

Part LIll Illustrations : — Plate

528. Ammonites variabilis

(Sonninites alsaticus) DXXVIII A

577. Ammonites murchisonae obtusus

(Bredyia crassomata) DLXXVII

578. Hammatoceras dolium

(Parammatoceras rugatum) . . DLXXVIII

579. Brasilia decipiens

(Planifastigites platys) .. .. DLXXIX

580. Witchellia sp.

(Witchellia platymorpha) . . . ." DLXXXa, b

581. Ammonites baculatus

(Baculatoceras baculatum) . . . . DLXXXl

582. Ammonites parkinsoni longidens

(Odontolkites longidens) . . . . DLXXXII

583. Ancyloceras sp.

(Plagiamites cyphus) DLXXXIII

584. Ancyloceras sp.

(Plagiamites campylus) .. .. DLXXXIV

585. Ammonites truellei gracilis

(Strigoceras gracile) DLXXXV

586. Ammonites gulielmi

(Gulielmina quinqueplicata) .. DLXXXVI

587. Ammonites eudoxus

(Kellawaysites multicostata) . . ULXXXVII

588. Cardioceras suessi

(Paracardioceras persecans) .. DLXXXVIII

589. Ammonites decipiens

(Ringsteadia frequens) . . . . '. . DLXXXIX

590. Ammonites rotundus

(Pallasiceras rotundum) DXC

591. Ammonites bononiensis

(Polymegalites polypreon) .. .. DXCIa, b

592. Ammonites giganteus

(Gigantites pachymeres) DXCIIa, b

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CONTENTS

Part LIV

Illustrations : — Plate

593- Witchellia sutneri

(Gelasinites gelasinus) DXCIIIa, b

594. Witchellia, spinous

(Witchellia glauca) DXCIV

595. Stephanoceras clausiprocerum

(Zigzagiceras clausiprocerum) . . . . DXCVa, b

596. Perisphinctes patina

(Loboplanulites longilobatus) .. DXCVI

597. Ammonites sedgwickii

(Anakosmokeras effulgens) .. .. DXCVIIa, b

598. Ammonites sedgwickii

(Gulielmites sedgwickii) DXCVIII

599. Cardioceras excavatum

(Scoticardioceras scoticum) . . DXCIX

600. Ammonites vertebralis

(Sagitticeras moderatum) DC

601. Ammonites pectinatus

(Keratinites keratophorus) DCI

602. Ammonites pectinatus

(Keratinites cornutifer) DCII

603. Ammonites biplex

(Paravirgatites infrequens) DCIII

604. Ammonites rotundus

(Pallasiceras lydianites) DCIV

605. Ammonites triplex

(Lydistratites biformis) DCVa, B

606. Perisphinctes devillei

(Lydistratites cunctator) DCVIa, b

607. Ammonites rotundus

(Crendonina subrotundata) .. DCVII

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608. Ammonites redcarensis

(Schlotheimia redcarensis) DCVIII

609. Echioceras sp.

(Homechioceras simile, T. & W.) .. .. DCIX

610. Ammonites murchisonas

(Kiliania depilata) DCX

611. Sonninia mammillate

(Papilliceras micracanthicum) . . DCXI

612. Cosmoceras parkinsoni var. rarecostatum

(Parkinsonia pachypleura) .. .. DCXII

613. Oppelia fusca

(Gonoxjdtes limosus) DCXIII

614. Ammonites gowerianus

(Galilaeites curticornutus) . . . . DCXIV

615. Ammonites fluctuosus

(Binatisphinctes fluctuosus) DCXV

616. Cardioceras cordatum

(Cardioceras costellatuni) DCXVIa, b

617. Ammonites kapffi

(Plasmatoceras plastum) DCXVII

618. Ammonites kapfii

(Plasmatites crenulatus) DCXVIII

619. Ammonites quadratus

(Vertebriceras quadratum) DCXIX

620. Perisphinctes gorei

(Gyromegalites polygyralis) . . . . DCXXa, b

621. Ammonites bononiensis

(Galbanites cretarius) DCXXI

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Part LVI Pages 5-16 ; 16 Plates

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CONTENTS

Part LVI

Text : — Page

Terminology 5

Systematic 7

Illustrations : — Plate

353. Ammonites rotundus

(Lydistratites lyditicus) CCCLIIIc, d

520. Olcostephanus triplicatus

(Kerberites kerberus) DXXa, b

622. Bigotites thevenini

(Bigotites trifurcatus) * DCXXII

623. Stephanoceras pseudoprocerum

(Zigzagiceras pseudoprocerum) . . . . DCXXIII

624. Stephanoceras subprocerum

(Zigzagiceras subprocerum) DCXXIV

625. Cosmoceras duncani

(Bikosmokeras geminatum) DCXXV

626. Cosmoceras dvmcani

(Kuklokosmokeras kuklikum) . . .. DCXXVIa, b

627. Ammonites vertebralis

(Sagitticeras cariniferum) DCXXVII

628. Cardioceras suessi

(Anacardioceras expositum) . . DCXXVIIIa, b

629. Cardioceras maltonense

(Anacardioceras secundarium) . . DCXXIX

630. Cardioceras excavatum

(Anacardioceras delicatum) .. .. DCXXX

631. Ludwigia romanoides

(Sonninites simulans) DCXXXI

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TYPE AMMONITES-VI

S. S. BUCKMAN

With illustrations, from photographs by J. W. TuTCHEK and the Author

Part LVll Pages 17-20 ; 16 Plates

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CONTENTS

Part LVII Text : — Page

Systematic 17

Illustrations : — Plate

354. Ammonites pectinatus

(Pectinatites pectinatus) CCCLIV

590. Ammonites rotundus

(Pallasiceras rotundum) DXCa,b,c

602. Ammonites pectinatus

(Keratinites cornutifer) . . DCII

632. Ammonites ziphus

(Xipheroceras ziphus) DCXXXII

633. Ammonites cordatus

(Cardioceras costicardia . . . . DCXXXIll

634. Amaltheus cordatus

(Pachycardioceras robustum) . . DCXXXIV

635. Ammonites excavatus

(Anacardioceras delicatulum) .. DCXXXV

636. Ammonites vertebralis

(Vertebriceras costulosum) . . DCXXXVI

637. Perisphinctes rotundus

(Allovirgatites woodwardi) . . . . DCXXXVII

638. Perisphinctes dorsoplanus

(Allovirgatites distans) DCXXXVIII.A, B

639. Ammonites rotundus

(Lydistratites gibbosus) .. .. DCXXXIX,a,b,c

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Part LVIII Pages 21-24 ; 16 Plates

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Part LVIII 1 ext : Page

Systematic 21

Illustrations : — Plate

412. Sonninia corrugata CDXII a

482. Leptechioceras aplanatum

(Euechioceras nobile) CDLXXXII*

537. Ancyloceras calloviensis

(Parapatoceras calloviense) . . . . DXXXVII*

640. Caloceras aplanatum

(Metechioceras aplanatum) DCXL

641. Hammatoceras dolium

(Parammatoceras dolium) DCXLI

642. Witchellia laeviuscula

(Rubrileiites ruber) DCXLII

643. Ammonites moorei

(Phaulozigzag phaulomorphus) . . DCXLIII

644. Ammonites elegans

(Micromphalites oxus) DCXLIV

645. Ammonites koenigi

(Proplanulites laboratus) DCXLV

646. Lunuloceras svevum

(Lunuloceras glyptum) DCXLVI

647. Cardioceras excavatum

(Galecardioceras galeiferum) .. .. DCXLVII

648. Ammonites vertebralis

(Vertebriceras rachis) DCXLVIII

649. Perisphinctes, auriculate

(Otosphinctes ouatius) DCXLIX

650. Dichotomoceras dichotomum

(Dichotomosphinctes antecedens) .. .. DCL

651. Ammonites pectinatus

(Keratinites proboscide) DCLI

652. Ammonites devillei

(Keratinites naso) DCLII

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With illustrations from photographs by J. W. TuTCHER, C. C. Gaddum, H. G. Herring and the Author

Part LIX Pages 25-28 ; 16 Plates

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CONTENTS

Part LIX Text : — Page

Systematic 25

Illustrations : — Plate

653. Coroniceras keelingi MS.

(Keynshamites keelingi) DCLIIIa, b

654. Stephanoceras commune

(Orthodactylites directus) .. .. DCLIV

655. Ammonites attenuatus

(Microdactylites attenuatus) .. .. DCLV

656. Ammonites delicatus

(Dactylioceras delicatum) DCLVI

657. Dactylioceras attenuatum

(Arcidactylites arcus) DCLVII

658. Dactylioceras braimianmn

(Zugodactylites braunianus) . . . . DCLVIII

659. Witchellia laeviuscula

(Anolkoleiites plenus) DCLIX

660. Ammonites banksii

(Teloceras banksii) DCLXa, b

661. Cosmoceras dimcani

(Bikosmokeras deficiens) DCLXIa, b

662. Ammonites intertextus

(Peltoceratoides intertextus) DCLXII

663. Perisphinctes orientalis

(Perisphinctes cowleyensis) DCLXIIIa, b

664. Ammonites devillei

(Keratinites nasutus) DCLXIV

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CONTENTS

Part LX Text : — Page

Systematic 29

Illustrations : — • Plate

138. Ammonites serpentinus

(Hildoceratoides serpentinus) . . CXXXVIIIc

665. Lytoceras cornucopia

(Crenilytoceras crenatum) . . . . DCLXV

666. Lytoceras cornucopia

(Orcholytoceras metorchion) . . . . DCLXVI

667. Ammonites hildensis

(Hildoceras hildense) DCLXVIl

668. Dumortieria rhodanica DCLXVIIIa, b

669. Sonninia adicra

(Sherbomites adicrus) DCLXIX

670. Oppelia subradiata

(Oppelina pulchra) .. .. .. DCLXX

671. Oppelia (umbilicate sp.)

(Oppelina umbilicata) . . . . DCLXXI

672. Ringsteadia pseudo-yo

(Ringsteadia sphenoidea) . . . . DCLXXII

673. Ammonites biplex

(Holcosphinctes kimmeridiensis) . . DCLXXIII

674. Ammonites rotundus

(Lydistratites trigonalis) . . . . DCLXXIVa, b

675. Perisphinctes scythicus

(Virgatites scythicus) DCLXXV

676. Ammonites biplex

(Hydrostratites bifurcus) . . . . DCLXXVI

677. Ammonites biplex

(Leucopetrites caementarius) . . DCLXXVII

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Part LXI

Text :— Page

Systematic 29

Illustrations : — Plate

562. Wheatleyites pringlei

(Shotoverites pringlei) DLXIIa, b

580. Witchellia sutneri

(Witchellia platymorpha) DLXXX

678. Am. bucklandi costaries

(Primarietites primitivus) . . DCLXXVIII

679. Ammonites nanus

(Tragophylloceras nanus) . . . . DCLXXIX

680. Lytoceras cornucopia

(Crenilytoceras formosum) DCLXXX

681. Lytoceras cornucopia

(Orcholytoceras appropinquans) DCLXXXI

682. Ammonites falcifer

(Harpoceras falcula) DCLXXXII

683. Ammonites fibulatus

(Peronoceras fibulatum) DCLXXXIII

684. Grammoceras soloniacense

(Maconiceras vigoense) . . DCLXXXIV

685. Hildoceras semipolitum

(Hildoceras semicosta) .. .. DCLXXXV

686. Grammoceras striatulum

(Costigrammoceras costigerum) DCLXXXVI

687. Ammonites laeviusculus

(Dundryites albidus) DCLXXXVII

688. Witchellia sutneri

(Witchellia falcata) DCLXXXVIII

689. Witchellia sutneri

(Witchellia actinophora) . . . . DCLXXXIX

690. Cardioceras vertebralc

(Cardioceras quadrarium) DCXC

691. Cardioceras excavatum

(Anacardioceras serrigerum) . . DCXCIa, b

692. Aulacosphinctes contiguus

(Allovirgatites tutcheri) DCXCII

693. Ammonites pallasianus

(Virgatites pallasianus) DCXCIII

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CONTENTS

Part LXII Text :— Page

Systematic 43

Illustrations : — Plate

68. Ammonites vermis

(Vermidactylites vermis) LXVIII A

502. Ammonites lonsdalii

(Lunuloceras lonsdalii) DII A

506. Ammonites discus

(Clydoniceras discus) DVI A

639. Ammonites rotundus

(Lydistratites gibbosus) DCXXXIX d

694. Plesechioceras delicatum

(Plesechioceras typus) DCXCIV

695. Pleurechioceras deciduum

(Pleurechioceras typicum) DCXCV

696. Leptechioceras planum DCXCVI

697. Euechioceras angustilobatum

(Stenechioceras angustilobatum) . . DCXCVII

698. Ammonites kurrianus

(Platyharpites platypleurus) . . DCXCVIII

699. Dactylioceras helianthoides

(Xeinodactylites helianthoides) . . . . DCXCIX

700. Ammonites annulatus

(Dactylioceras annulatum) DCC

701. Ammonites iibulatus

(Peronoceras prgepositum) DCCI

702. Ammonites humphriesianus

(Emileites malenotatus) DCCII

703. Cardioceras sp.

(Cardioceras anacanthum) . . . . DCCIII

704. Ammonites cordatus var. excavatus

(Prionodoceras truculentum) . . . . DCCIV

705. Ammonites pectinatus

Pectinatites scalariformis) DCCV

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Part LXIII

Illustrations : — Plates

135- Sphaeroceras perexpansum

(Labyrinthoceras intricatum) CXXXV A

157. Ammonites tenuicostatus

(Tenuidactylites tenuicostatus) . . . . CLVII A

706. Ammonites planicosta

Xipheroceras binodulatum .. .... DCCVIa, b

707. Dactylioceras commune

(Koinodactylites communis) DCCVII

708. Dactylioceras commune

(Curvidactylites curvicosta) DCCVIII

709. Sonninia (Am. arenatus)

Prepapillites arenatus DCCIX

710. Ammonites brocchii

(Emileia brocchii) DCCXa, b

710. Spha;roceras brocchi

(Emileia brocchii) ; . . . DCCXc, d

711. Ammonites brocchi

(Emileia subcadiconica) DCCXI

712. Am. humphriesianus crassicosta

(Kumatostephanus perjucundus) .. DCCXHa, b

713. Perisphinctes martinsi

(Bajocisphinctes bajociensis) . . DCCXIII

714. Perisphinctes parandieri

(Perisphinctes tumulosus) DCCXIV

715. Perisphinctes parandieri

(Dichotomosphinctes holtonensis . . DCCXV

716. Pictonia tenuis

(Pictonia costigera) DCCXVI

717. Ammonites pseudogigas

(Glottoptychinites audax) . . . . DCCXVIIa, b

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7325

TYPE AMMONITES— VI

DXXVIII A

Fig I

Fig. 2

Ammonites variabilis [Clatcombe], " near Sherborne, Dorset, Inferior Oolite Brown ironshot ; S.B., ex Darell, Coll. 4350 S. 3?,, 33. 35, 36 ; 67, 39, 30, 39

SONNITES ALSATICUS, Haug sp. 1885 Sonninian, alsaticiis. See CDLXI

I

1925

TYPE AMMONITES— VI

DLXXVII

X o*6l

y//>

Fig.

Fig. 2

Ammonites murchison^e obtusus Burton Bradstock, Dorset ; I.O., [scissum, Q.J.G.S., Ixvi, 1910, 74]

Burtonia, Id, 97 ; Bredyia, Proc. G.S. 1910, No. 896, iii S.B. Coll. 4351 ; S. 133, 44, 36, 25 ; 242, 38, 26, 30 ; max. 242

BREDYIA CRASSORNATA, S. Buckman sp. 1910 Ludwigian, scissum ; Plesiotype. Cf. CDIX

1925

TYPE AMMONITES— VI

DLXXVIII

,.- ,3,.-.

l^ig. I

Fig. 2

Hammatoceras dolium, S. Buckman, 1889, Paratype _ y.J.G.S xlv 661-663; XXII, 18; "Bradford Abbas, Dorset

S sT't \f. }^T^''''' f- ^^- "^^9 (S.B. Coll. 434. ex E. Wilson) S. 83. Z7. 36 (30). Z7 ; 148. 41, 29, 35. (+ keel est.) ; max. c. 200+

PARAMMATOCERAS RUGATUM, nov. Ludwigian, planiforme ; Holotype. See DLV

1925

TYPE AMMONITES— VI

DLXXIX

X 0-76

Fig. I Fig. 2

Brasilia decipiens

[Ambers Knoll], " Sherborne, Dorset ; I.O.," [ringens bed]

S.B., ex J.B., Coll. 3950 ; subconcavumbilicus costate

S. 103, 48, 23, 20 ; 194, 41, 19, 25 ; max. c. 196

PLANIFASTIGITES PI.ATYS, nov. Ludwigian, platychora ; Genotype, Holotype. Cf. CCCLXXXVIII

192.5

TYPE AMMONITES— VI

DLXXX A

X 0-73

WiTCHELLIA SP., S. BUCKMAN, 1889, S.l. Figd.

Q.J.G.S., xlv, 663, XXII, 12 ; " Frogden Quarry, Oborne, Dorset " Green marl bed " ; Manchester Mus., L. 11441 (S.B. Coll. 456) S. 118, 47, 27, 25 ; 203, 43, 22, 24 ; size c. 160 ; max. c. 190

WITCHELLIA PLATYMORPHA, xov. Sonninian, Witchellia ; Holotype. See DLVI

1925

TYPE AMMONITES-VI DLXXX B

Fig. 2 N.S. Fig. I X 0.73

WiTCHELLiA sp., S. BucKMAN, 1889, S.l. figured

Manchester Museum, L. 11441, ex S.B. Coll. 456

In fig. I and in PI. ULXXXa the arrows mark portions, mostly terminal

lobules, of uncompleted suture-line

WITCHELLIA PLATYMORPHA, nov. Sonninian, Witchellia ; Holotype. See DLVI

7925

TYPE AMMONITES~VI

DLXXXI

Fig. la

Fig. I

:^"^r%'

'(T'-^:,iSSlliSSiBSSi

Fig. 2

^

Ammonites baculatus

[Frogden Quarry], " Obornc, Dorset; I.O.," [Up. part Roadstone]

[Niortense] ; S.B., ex Darell, Coll., 866 ; Parkinsonia sp.

S. 56. 37. 40, 30 ; 100, 34, 30, 39 ; max. 100

BACULATOCERAS BACULATUM, Quenstedt sp. 1886 Stepheoceratan, niortense. Cf. CCCLVIII

1925

TYPE AMMONITES— VI

DLXXXII

^M J n-i^

Fig. I

Fig- la

Fig. 2

Fi". 2a

Ammonites parkinsoni longidens

" Burton Bradstock, Dorset ; I.O.," [Astarte Bed]

S.B., ex Darell, Coll. 874 ; Garantiana sp.

S. 54. 45. 50, 28 ; 104, 38, 38, 33

ODONTOLKITES LONGIDENS, Quenstedt sp. 1846 Parkinsonian, garantiana ; Genotype. Cf. CCCLVIII

1925

TYPE AMMONITES— VI

DLXXXIII

Fig. I

Fig. I a X 2-9

I

Ancyloceras sp.

" Burton Bradstock, Dorset ; Inferior Oolite "

[Astarte Bed, Q.J.G.S., Ixvi, 1910, 73, § 11, 4]

S.B., ex Darell. Coll. 890

PLAGL\MITES CYPHUS, nov. Parkinsonian, garantiana ; Holotype. See DXXXIX

1925

TYPE AMMONITES— VI

DLXXXIV

X 2-g

J'A>

Ancyloceras sp.

" Burton Bradstock, Dorset ; Inferior Oolite "

[Astarte Bed, Q.J.G.S., Ixvi, 1910, 73, §11, 4]

S.B., ex Darell, Coll. 4351

PLAGIAMITES CAMPYLUS Parkinsonian, garantiana ; Holotype. See DLXXXIII

1925

TYPE AMMONITES— VJ

DLXXXV

I

Ammonites truellei gracilis, Quenstedt (Amm. Schw. J. 1886, lxix, 10) ; Burton Bradstock, Dorset Third bed, truellei bed ; S.B. Coll. 1513 S. 102, 58, 29, 7-8 ; 224, 56, 25, 5-2 ; max. c. 335

STRIGOCERAS GRACILE, Quenstedt sp. Parkinsonian, truellei. See CDLXXII

1925

TYPE AMMONITES— VI

DLXXXVI

Fig. I

Fig. la X 2

Fig. 2

Ammonites gulielmi " Kellaways, Wiltshire ; Kellaways Rock," [basal part] Purplish grit ; J.W.T. Coll. ; smooth to coronate inner whorls S. 23, 43, 32, 30 ; 49, 41, 26-5, 32 ; ribs (i) 31, (2) 151

GULIELMINA QUINQUEPLICATA, NOV. Proplanulitan, gulielmi ; Genotype, Holotype. See CXCIV

1925

TYPE AMMONITES— VI

DLXXXVII

Fig. I

Fig. 2

" Ammonites eudoxus ? "

" Chippenham, [Wiltshire] ; Kellaways Rock " ; buff grit

M.P.G. Coll. 25683 ; {Reineckeia multicostata Petitclerc, 1915, xii, 2)

S. ZZ> 35. 44. 39 ; 55- 2,7, 36. 40 ; size 60 ; max. c. 80

KELLAWAYSITES MULTICOSTATUS, Petitclerc sp. Reineckeian, fraasi ? Genotype. Cf. DXXII

1925

TYPE AMMONITES— VI

DLXXXVIII

Cardioceras suessi ? S. BucKMAN, 1925, cit. spec. T.A. V, 65, § XX, 6 ; Ham Cliff, Osmington, Dorset'

Ham Cliff Grit, stiessi ; S.B. Coll. 4296

S. 70, 43, 16 ? 23 ; 100, 43, 14 ? 18 ; max. c. 104

EL, V ; Li, V ; tubercles lacking ; Li, c. 42, at 31 mm.

PARACARUIOCERAS PERSECANS, nov. Cardioceratan, persecans ; Genotype, Holotype. See CCCLXXV

1925

TYPE AMMONITES— VI

DLXXXIX

X o-g

Fig. I

Fig. 2

Ammonites decipiens " fWootton Bassett, Wiltshire ; Kimmeridge Clay] " J.W.T. Coll. S. 64, 39, 31, 33; no, 38, 26-5. 34 S.l. 40, 40, 29 of 26 ; 36, 36, 25 of 40 mm. whorl-breadth

RINGSTEADIA FREQUENS, S.'\lfeld 1917, (ix, 2, lectot.) Ringsteadian, brandesi. See DLX

1925

TYPE AMMONITES— VI

DXC

Fig. I

Fig. 2

-^.f ^

^^77) ^^as^,/^es. ^-^Z. -^^

Fig- 3

Ammonites rotundus, J. Sowerby, 1821, Holotype M.C. iii, 169 ; CCXCIII, 3 ; " from Purbeck, prob. fd. in Kim. Claj' " [Chapman's Pool, I. of Purbeck, Dorset ; K.C. Nodule Bed= Portl. Sands] Brit. Mus. N.H. 43899 ; S. 74, 26, 28, 50 ; 84, 26, 29, 50

PALLASICERAS ROTUNDUM, J. Sowerby, sp. Paravirgatitan, lyditicns ; Genotype. Cf. CCCLIII

7925

TYPE AMMONITES— VI

DXCiA

V

Ammonites bononiensis

Okus Quarry, Swindon, Wiltshire ; Soft Bed below Cockly bed

[Basal part of C. & P.'s Cockly Bed— T.A. IV, 29, § in, 6]

S.B. Coll. 4108. Thick, with many feeble ribs ; 1,2 long

POLYMEGALITES POLYPREON, Nov. Behemothan, polypreon ; Genotype, Holotype. Cf. CCLVII

1925

TYPE AMMONITES— VI

DXCI B

Fig. 2 N.S.

Fig. I X 0-25

Ammonites bononiexsis Swindon ; Portl. St. ; S.B. Coll. 4108 ; Term. part, crushed in S. 320, 31, 36, — ; 424, 31, 35, 46 ; size c. 496 ; max. c. 550 EL, 53 ; Li, 50 ; L2, 41 per cent, of 100 mm. wh. -breadth.

POLYMEGALITES POLYPREON, Nov. Behemothan, lencus / Kerberites ; Genotype, Holotype. Cf. CCLVII

1925

TYPE AMMONITES— VI

DXCII A

X 0-25

Ammonites giganteus

Haddenham, Bucks ; Qy. in cutting N. of Ry. Sta. ; Portl. Stone

Blue bed ; S.B. Coll. 4352, pres Mr. p-rederick Merrick

S. 290, 32, 48, 45 ; 422, 32, 41, 44 ; ribs 45

GIGANTITES PACHYMERES, Nov. Gigantitan, Gigantites ; Holotype. See CCLVI

1925

TYPE AMMONITES— VI

DXCII B

Fig. 2 X 0-35

Fig. I N.S.

Ammonites giganteus

Haddenham, Bucks ; S.B. Coll. 4352 ; size 469 ; max. c. 560

One side eroded ; thickness est. — double of half-whorls

L2 long, c. 45 % of 94 mm. whorl-breadth

GIGANTITES PACHYMERES, nov. Gigantitan, Gigantites ; Holotype. See CCLVI

7525

TYPE AMMONITES— VI

Fig. 2

DXCIII A

Fig. I WlTCHELLIA aff. SUTNERI, S. BUCKMAN, 1893, cit. speC.

Q.J.G.S., xlix, 492-4, § IX, 6c ; Sandford Lane Quarry, Sherborne, Dorset ; Fossil Bed, lower part S.B. Coll. 2699. Test inside a enlarged, PI. DXCIII b, fig. 3

GELASINITES GELASINUS, NOV. Sonninian, Shirbinrnia ; Genotype, Holotype. Cf. CCCXLI

1925

TYPE AMMONITES— VI

DXCIIl B

Fig. I

Fig. 2

Kg- 3 X 3

t/.

WiTCHELLIA aff. SUTNERI, S. BUCKMAN, 1893, cit. SpeC.

Sherborne, Dorset ; S.B. Coll. 2699

S. 52, 42, 27, 32 ; 128, 40, 20, 34 ; max. c. 170

Fig. 3 shows test (enlarged) with rows of punctae

GELASINITES GELASINUS, Nov. Sonninian, Shirbtdrnia ; Genotype, Holotype. Cf. CCCXLI

I

1925

Fig- 3 X 1-36

TYPE AMMONITES— VI Fig. la X 136

DXCIV

Fig. 3 X 1-35

Fig. I

WiTCHELLiA, spinous, S. Buckman, 1889, cit. spec.

Q.J.G.S., xlv, 658 ; " [Frogden Qy.], Oborne, Dorset ; I.O."

Green marl (Id. xlix, 1893, 500, § xv, 9) ; S.B. Coll. 2258

S. 35, 40, 28-5, 31-5 ; 66, 49, 24, 27 ; max. c. 75

WITCHELLIA GLAUCA, nov. Sonninian, Witchellia ; Holotype. See DLXXX

1925

TYPE AMMONITES~VI

DXCVa

X 0-98

' Stephanoceras ' CLAUSiPROCERUM, S. BucKMAN, 1892, Holotype

Q.J.G.S., xlviii, 449 ; xiii, 5 ; " [Grange Quarry], Broad Windsor, Dorset"

" Inf.OoL, [upper beds] ; Manchester Mus., L. 11422," exS.B., exDarellC.

Mark of continuation of whorl for another 3/4 volution

ZIGZAGICERAS CLAUSIPROCERUM, S. Buckman sp. Zigzagiceratan, polluhrutn. See CCCXXXV

I

1925

TYPE AMMONITES— VI ■

DXCVb

X 0-98

Fig. I

Fig. 2

' Stephanoceras ' CLAUsiPROCERUM, S. BucKMAN, 1892, Holotype [Grange Quarry], Broad Windsor, Dorset ; Manchester Mus., L. 11422" S. 74, 42, 38, 28 ; 130, 43, 32, 25 ; size c. 135 ; max. c. 225

ZIGZAGICERAS CLAUSIPROCERUM, S. Buckman sp. Zigzagiceratan, polliihrum. See CCCXXXV

1923

TYPE AMMONITES— VI X 0-96

DXCVI

Fig. I

Fig 2

Perisphinctes patina

" Hanborough Qy., (northern pit). Long Hanborough, Oxon "

" Combrash [Middle Combr.] ; Mus. Pract. Geol. 37364 "

S. 93. 31, 30, 45 ; 188, 28-5, 28, 44 ; max. c. 340

S.l. 56, 58, 29 of 52 mm. whorl-breadth

LOBOPLANULITES LONGILOBATUS, nov. Macrocephalitan, Homoeoplanulites ; Genotype, Holotype. Cf. DXV

i

1925

TYPE AMMONITES— VI

DXCVII A

X 103

" Ammonites sedgwickii " Gosford Hill Farm (well-sinking). N. of Oxford ; Oxford Clay"

" About 12 feet down ; Mus. Pract. Geol. 37499 " S- 57. 47. 25, 158 ; 112, 46, 23, 21-5 ; max. c. 130

ANAKOSMOKERAS EFFULGENS. nov. Kosmoceratan, stutchbnrii ; Holotype. See DXXXI

1925

TYPE AMMONITES~VI

DXCVII B

Fig. :

Fig. 2

" Ammonites sedgwickii " Gosford Hill Farm (well-sinking), N. of Oxford ; Oxford Clay" " About 12 feet down ; Mus. Pract. Geol. 37499 " Lacks lineation of A. sedgwickii, and is more lobate

ANAKOSMOKERAS EFFULGENS, nov. Kosmoceratan, stutchburii ; Holotype. See DXXXI

1925

TYPE AMMONITES— VI

DXCVIII

X 0-96

Ammonites sedgwickii, Pratt, 1841, " Holotype ? " Ann. Mag. N.H. viii, 163, 165 ; v, i ; "Christian Malford, [Wilts] " Oxford Clay ; Mus. Pract. Geol. 30518, pres. S. P. Pratt " S. 45, 51, — , 19; 68, 48, — , 19; 100, 44, — , 22

GULIELMITES SEDGWICKII, Pratt sp. Kosmoceratan, obdudiis. See DLIX

1925

TYPE AMMONITES~VI

DXCIX

jyji.

JSS

Cardioceras cf. EXCAVATUM (thin), S. BucKMAN, 1924, cit. spec.

T.A. V, 48, § IX, 4 ; " Ardassie Point, Brora, Sutherland, Scotland "

Ardassie Beds; " Geol. Surv. Scotland, M. 1069 6 ; " Li cruciform

S. 71, 49, — , 14 ; 103, 55, 15-5 ?, 14-5 ? ; size c. 139 ; max. c. 160

SCOTICARDIOCERAS SCOTICUM, nov. Cardioceratan, scoticum ; Genotype, Holotype. Cf. DLXXXVIII

7925

TYPE AMMONITES— VI

DC

Fig. 2

Fig. I

Fig.

S.S.B.

.\mmoxites vertebralis

Headington Quarry (Magdalen College Pit), Oxfordshire

" Bottom Course " [derived ?1, see V, 50, § x, 2 ; S.B. Coll. 3840, purch.

S. 49, 43, 57. 30 ; 83, 37, 42, 34 ; 21 ribs ; max. c. 83

SAGITTICERAS MODERATUM, nov. Cardioceratan, Sagitticeras ; Holotype. See CCLXXX

W25

TYPE AMMONITES— VI

DCI

Fig. I

Fig. 2

Ammonites pectinatus Wheatley, brickyard, Oxon ; Wheatley Sands ; S.B. Coll. 3838 (49, 39, 22, — ) ? (73, 40, 28, — ) ? Horn crumbled in extraction Length of horn now preserved, 11 ; complete, about 18 mm.

KERATINITES KERATOPHORUS, nov. Paravirgatitan, pringlei ; Genotype, Holotype. Cf. DLXVIII

7925

TYPE AMMONITES— VI

DCII

Ammonites pectinatus

" Swindon, [Wilts] ; Lower beds of the Portland Oolite "

[" Upper Cemetery Beds ; upper part"], glauconitic grit with Serpules

"Mus. Pract. Geol. 30757, Cunnington Coll."

S. 88, 40, 24, 30. Length of horn complete, 22 mm.

KERATINITES CORNUTIFER, Nov. Paravirgatitan, pringlei ; Holotype. See DCI

1925

TYPE AMMONITES— VI

DCllI

Fig. I

Fig. 2

Ammonites biplex

Sandpit near smallpox Hospital, Moreton Farm, Thame, Oxon

Hard layers of sandrock near top of Thame Sands

S.B. Coll. 3997, pres. Mr. Dick Liddington

S. 42, 38 ? 31, 36 ; 72, 30, 28, 43 ; c. 31 ribs

P.\R.\VIRG.\T1TES INFREQUENS, NOV. Paravirgatitan, paravirgatus ; Holotype. See CCCLXXXH

I

1925

TYPE AMMONITES— VI

DCIV

Fig. I

Fig- 3

Fig 2

Ammonites rotundus

" Hartwell, [Bucks] ; Lower Portland, Pebble Bed ; Hunt Coll."

Blue-grey stone with rather large lydites ; " Bucks C. Mus. 108/25

S- 53, 33. 32, 36 ; ribs 32 ; 68, 32, 32, 40 ; ribs 29, biplicate, zigzag

S.l. 40, 37, 17 at I7'5. Diff. A. rotundus, arcuate, zigzag per. ribs

PALLASICERAS LYDIANITES, Nov. Paravirgatitan, lyditicus ; Holotype. See DXC

1925

TYPE AMMONITES— VI

DCVa

Fig- 4

Fig. 3

Fig. I

Fig. 2

Ammonites triplex ; W. H. Smyth, 1851, Fig. Spec. iEdes Hartwellianae, p. 24 ; " Brick Pit, Field 151 " Hartwell Estate, Bucks ; rubble above clay " (Lee's Catalog) Buff stone with small lydites ; Bucks County Mus., Lee Coll., 2060/H

LYDISTRATITES BIFORMIS, nov. Paravirgatitan, lyditicus ; Holotype. See CCCLIII

1925

TYPE AMMONITES~VI

DCVb

Fig- 3 X 2-.

Fig. I a X 3

Fig. 2x3

Ammonites TRIPLEX ; W. H. Smyth, 1851, Fig. Spec. Hartwell Estate ; Bucks County Mus. 2060/H ; Virgatite stage S. 13 46, 42, 23; c. 27 ribs; 29-5, 41, 37, 18; c. 32 ribs S- 62. ^3, 34, 40 ; 26 ribs ; S.l. 63, 48, 22, at 14 mm.

LYDISTRATITES BIFORMIS, Nov Paravirgatitan, lyditicns ; Holotype. See CCCLHI

J925

TYPE AMMONITES— VI

DCViA

Fig. I

Fig. 2

Perisphinctes DEVILLEI

" Brick Pit in field 151, Hartwell Estate, Bucks " (Lee's Catalog)

Matrix as 2060/H (DCV) ; Bucks C. Mus. (Lee Coll.) 2061/H

S. 24, 46, 33, 21 ; c. 30 ribs ; 43, 42, 30, 31 ; c. 31 ribs

S.l. 54, 41, 21 at I4'5 mm. ; delay in showing biplic. stage of DCV

LYDISTRATITES CUNCTATOR, nov. Paravirgatitan, lyditicus ; Holotype. See DCV

1925

TYPE AMMONITES— VI

DCVlB

Fig. I

Fig. 2

" Perisphinctes DEVILLEI "

[Hartwell, Bucks, Brickpit in field 151] ; " Portland Stone "

Matrix as 2061/H (DCVIa) ; " Bucks C. Mus. (Z. D. Hunt Coll.) 107/25'

S. 16, 47, 40, 28 ; 33, 41, 35, 30 ; c. 38 ribs ; colomorph

LYDISTRATITES CUNCTATOR, nov. Paravirgatitan, lyditiais ; Paratype. See DCV

1925

TYPE AMMONITES— VI

DCVII

Fig. I

Fig. 2

Ammonites rotundus

" Aylesbury, Bucks, (Museum yard, loose) ; Portland Stone "

Grey shelly "oolite with oysters ; " Bucks County Mas. 38/19 "

S. 78, 34. 37. 44 ; 136. 29, 34. 51 ; S.l. 67, 59, 33 at 27 mm. wh.-b.

Ribs 32, biplicate near peripheral edge

CRENDONINA SUBROTUNDATA, nov. Behemothan (11 }), leptolobatus. Genotype, Holotype. See GDI

7925

TYPE AMMONITES~VI

DCVIII

F'g- 3

Fig. 2 "<■ ^

Fig. I

Fig. 3a

Ammonites redcarensis Young & Bird, 1822, Holotype ?

Geol. Yorksh. 248, 327 ; xiv, 13, " Robin Hood's Bay, Yorkshire,'

" Lowest Shale, [Lower Lias] ; Whitby Museum, 314 "

S. 42-5, 40, 35, 30 ; 60, 42, 33, 31-5. Fig. I, Protograph (copy)

Figs. 2, 3, sent as orig. of fig. i. Qy., several origs. of fig. & descr. ?

SCHLOTHELMIA REDCARENSIS, Young & Bird sp. Schlotheimian, ntarmorea. See CCCXCV

1925

TYPE AMMONITES~VI (Trueman & Williams)

DCIX

Fig- 3 X 3-3

Fig. 2

Fig. I

" ECHIOCERAS SP."

" Stonebarrow, Charmouth, Dorset (Cliff-foot) ; Raric. Clays, Bed 98

" A few inches below 99 (Watch Am. Stone) ; W. D. Lang Coll. 6671 "

S. 27, 20, 24(25), 62 ; 37, 20, 24(25), 61 ; max. c. 70 "

HOMECHIOCERAS SIMILE, Trueman & Williams, nov. Deroceratan, simile ; Genotype, Holotype. (T. & W.). Cf. DLIV

7925

TYPE AMMONITES— VI

DCX

X 0-92

ig. I

k^ Jf*"'^

Fig. 2

Fig. 3 N.S.

" Ammonites murchison^ "

Chideock, [Quar Hill], Bridport, Dorset ; Inferior Oolite

" Murchisonce zone [Wild Bed] ; J. W. Tutcher Coll."

" S. 81, 39. 27, 25 ; 135, 41, 26, 32 " ; max. c. 138

KILIANIA DEPILATA, nov. Ludwigian, murchisonce ; Holotype. Cf. CDIX

1925

TYPE AMMONITES— VI

DCXI

X 0-73

^/h^otM^ ^ifv

SoNNiNiA mammillate, S. Buckman, i8g8, cit. spec.

Q.J.G.S., Hi, 680, § IV, 5 ; " N. main-road Quarry, Dundry, Somerset

" Bajocian, Ironshot, sauzei ; S. B. Coll. 296 "

S. 100, 40, 24, 32 ; 179, 37, 24, 35 ; max. c. 340 Spines smaller and central coiling slower than P. mesacanthum

PAPILLICERAS MICRACANTHICUM, Nov. Sonninian, propinquans ; Holotype. See DLVII

j

1925

TYPE AMMONITES— VI

DCXII

,^ r.

S.S.O.

F'g- 3

CosMOCERAS PARKiNSONi var. RARECOSTATUM, S.B., 1881, Paratype Q.J.G.S. xxxvii, 599 ; E. of Oborne Village, Sherborne, Dorset Inf. Ool., Building Stone ; Manchester Mus. (S.B. Coll.) L. 11228 S. 84, 32, 22-5, 43 ; 135, 30-5, 20, 46 ; ribs 40 ; max. c. 135

PARKINSONIA PACHYPLEURA, Nov. Parkinsonian, garantiana ; Holotype. See CCCLII

7925

TYPE AMMONITES— VI

DCXIII

Fig. I

Fig. 2

J.^-C^

Oppelia fusca ; Solly & Walker, 1891, cit. spec.

Proc. Dorset F.C. xi, 119 ; " Eype, [Black Rocks], Bridport, Dorset

" Clay on top of Inf. Ool.," [Fuller's Earth Clay, lower part]

S.B. Coll. 1959, pres. J. F. Walker ; venter fastigate, subcar.

S. 30, 53. 25, 15 ; 57-5, 56, 21, 87

GONOXYITES LIMOSUS, Nov. Zigzagiceratan, knapheuticus ; Holotype. See CDLXXXI

1925

TYPE AMMONITES— VI

DCXIV

X 1-49

Fig. I

Fig. 2

Ammonites gowerianus [Kellaways, Wiltshire ; Kellaways Rock], buff grit Nottingham Univ. Coll. C, ex R.A.C. ; rancinate ; short lat. aur. S. 26, 42, 40, 27 ; 46, 39, 36, 33

GALILAEITES CURTICORNUTUS, nov. Proplanulitan, opimus ; Holotype. See CCCIX

1923

TYPE AMMONITES~VI

DCXV

X 077

" Ammonites fluctuosus, Pratt, 1841, Holotype ? " Am. Mag. N.H., [viii, 164, 165 ;] vi, i ; Christian Malford, [Wilts]" Oxford Clay ; Am. Bakeries, d'Orb. ; M.P.G., pres S. P. Pratt, 30353 " S. 92, 35, — , 38, ribs c. 29 ; 162, 28, — , 51, ribs 24

BINATISPHINCTES FLUCTUOSUS, Pratt sp. Kosmoceratan, fluctuosus. See CDLXXXV

1925

TYPE AMMONITES— VI

DCXVIA

Fig. I

Fig. 2

S.S.B.

Cardioceras CORDATUM Horton Brickyard, Horton-cum-Studley, Oxfordshire "Oxford Clay"; S.B. Coll. 4442, purch. ; (ES, O), Li, OV S. 33. 40, 30, 30 ; 49. 43. 32, 30 ; ribs 28

CARDIOCERAS COSTELLATUM, NOV. Cardioceratan, cardia ; Holotype. Cf. DLXXXVIII

1925

TYPE AMMONITES— VI

DCXVI B

Fig. 1

Fig. 2

S.S.B.

Cardioceras CORDATUM Horton Brickyard, Horton-cum-Studley, Oxfordshire "Oxford Clay"; S.B. Coll. 4443, purch. ; (ES, O), Li, OV S. 16, 44, Z7. 29 ; 33, 43. 32, 30, ribs 26

CARDIOCERAS COSTELLATUM, nov. Cardioceratan, cardia ; Paratype. Cf. DLXXXVIII

1925

TYPE AMMONITES— VI

DCXVII

X 1-4

F'g- 3

Fig. I

Fig 2

" Ammonites kapffi " ^^

•Bowood, [2 m. W. of Calne], Wilts; Oxf. Clay; M.PG. 30524 Matrix bluish argillac. limest., weathering whitish ; Li, OV S. 15, 43, 37, 32-5 ; 30-5, 39-5. 33, 33 ; ribs 37, on keel, c. 93 Plasmatoceras S.B., T.A. V, 66, § xxi

PLASM ATOCERAS PLASTUM, NOV. Cardioceratan, plastum (Plasmatoceras) ; Genot., Holot. Cf. DCXVl

1925

TYPE AMMONITES— VI

DCXVIII

X 1-4

F'g- 3

Fig. I

Fig. 2

" Ammonites kapffi " " Bowood, [2 m. W. of Calne], Wilts ; Oxf. Clay ; M.P.G. 30523 "

Matrix bluish argillac. limest. weathering greyish ; (Li, O) S- 17, 31, 38, 40 ; 31, 34, 31, 39 ; size & max. c. 33 ; ribs 45, on k., c. 171

PLASMATITES CRENULATUS, nov. Cardioceratan, plastum ; Genotype, Holotype. Cf. DCXVII

1923

TYPE AMMONITES— VI

DCXIX

Fig- I

Fig. 2

^^'^^ ^^

Ammonites quadratus, J. Sowerby (1813, M. C. i, 52 ; XVIII, 3) ; V ertehriceras quadratum S.B., 1920, cit. spec.

T.A. Ill, 17 ; Cowley, near Oxford ; Lower Calc. Grit S.B. Coll. 2779 ; S. 58, 40, 40, 26, ribs 21 ; 96, 36, 31, 32-5 ; ribs 30

VERTEBRICERAS QUADRATUM, J. Sowerby sp. Cardioceratan, V ertehriceras ; Topotype. See CXCVIII

7925

TYPE AMMONITES— VI

DCXXa

X 0-33

Perisphinctes gorei " Okus Quarry, Swindon, Wiltshire " ; [Sandy Bed below Cockly Bed]

[Basal part of C. & P.'s Cockly Bed]— T.A. IV, 29, § iii, 6 S.B. Coll. 4391, pres. C. H. Gore, F.G.S. Lydistratites-sta.ge inner whorls

GYROMEGALITES POLYGYRALIS, nov. Behemothan, polypreon ; Genotype, Holotype. Cf. CDI

1925

TYPE AMMONITES— VI

DCXXb

Perisphinctes gorei

Swindon, Wiltshire ; Portland Stone ; S.B. Coll. 4391

S. 228, 25, 28 + , 61, ribs 55 ; 363, 25, 24 x, 67, ribs 59

Max. c. 480 ; SI. 63, 64, 42 of 59 mm. whorl-breadth

GYROMEGALITES POLYGYRALIS Nov. Behemothan, polypreon ; Genotype, Holotype. Cf. GDI

1925

TYPE AMMONITES— VI

DCXXI

X 0-38

V

Ammonites bononiensis

' Teffont Evias (Chilmark), Tisbury, Wilts ; Portl., Chalky Series "

S.B. Coll. 4333, pres. Mr. T. T. Gething ; Si deeper than ES.

SI. — , 47, 24, of 64 ; 425, 44, 25, of 73 mm.

S. 206, 29, 28, 45, ribs 38 ; 314, 29, 29, 47, ribs 51

GALBANITES CRETARIUS, nov. Gigantitan, Gigantites ; Holotype. See CCCLV

1926

TYPE AMMONITES— VI

CCCLIIIc

Fig. 2

Fig. I X 0-97

Ammonites rotundus

Chapmans Pool, Isle of Purbeck, Dorset ; " Kimm. Clay "

[Nodule Bed] ; S.B. Coll. 4364, pres. Miss E. R. Thompson

S. 100, 27, 36, 47 ; 122, 29, 34, 52 ; SI. 29, 66, 62, 38

LYDISTRATITES LYDITICUS, S. Buckman, 1922 Paravirgatitan, lyditicus ; Plesiotype. Cf. CCCVII

1926

TYPE AMMONITES— VI

CCCLIIId

Fig- 3

Fig, I X oy5

Fig. 2 X o-g2

Ammonites rotundus Chapmans Pool ; " Kim. Clay," [Nodule Bed, c. 15' above shore] " Rotimdum Zone " ; S.B. Coll. 4364, inner whorls S. 38, 33. 44. — ; 65. 31. 41. 43 ; ribs 27 ; SI. 20-5, 63, 49, 21

LYDISTRATITES LYDITICUS, S. Buckman, 1922 Paravirgatitan, lyditicus ; Plesiotype. Cf. CCCVII

1926

TYPE AMMONITES~VI

DXXa

Olcostephanus triplicatus

"Okus Quarry, Swindon, Wilts; Portland Stone, Cockly Bed"

" Mus. Pract. Geol. 32394 " ; SI. 27, — , 40, 30

S. 88, 32, 40, 41 ; 139, 30, 40, 44 ; ribs 25, 58 ; size 146 ; max. c. 150

KERBERITES KERBERUS, S. Buckman, 1924 Behemothan (7), kerbems ; Plesiotype. Cf. CCCLV

1926

TYPE AMMONITES— VI

DXXb

Fig. I X 13

Fig. 2 X 084

Fig. la X 13

Olcostephanus TRIPLICATUS " Okus Quarry, Swindon, Wilts ; Mus. Pract. Geol. 32394 " With inner whorls showing multicostate (virgatite) stage Virgatite condition lasts till c. 35 mm. ; bradypalingenesis ?

KERBERITES KERBERUS, S. Buckman, 1924 Behemothan (7), kerbenis ; Plesiotype. Cf. CCCLV

1926

TYPE AMMONITES— VI

DCXXII

Fig. I

Fig. 2

BiGOTITES THEVENINI

" Burton Bradstock, Dorset ; Inf. Ool." [3rd Bed, Truellei] Greyi.sh-white matrix ; S.B., ex Darell, Coll. 855 S. 51. 35. 37. 36 ; 86, 35, 35, 38 ; ribs 35, c. 88 ; max. c. 150 Venter (test), ribs broken, alternate ; venter (cast), sulcate ; (Bigotitean)

BIGOTITES TRIFURCATUS, nov. Parkinsonian, tniellei ; Holotype. Cf. CXCI

1926 TYPE AMMONITES— VI

Fig. 3 Fig. 2

DCXXIII

Fig. I

' StEPHANOCERAS ' PSEUDOPROCEKUM, S. BUCKMAN, 1892, HolotypC

Q.J.G.S., xlvi, 449; xiv, 4, 5; "[Grange Quarry], Broad Windsor, Dorset"

' Inf. Ool., [upper beds] ; " Manchester Mus., L. 11426, ex S.B., ex Darell, Coll.

S. 69, 39, 47, 38 ; 121, 40, 42, 32 ; ribs c. 35 ; max. c. 210+

ZIGZAGICERAS PSEUDOPROCERUM, S. Buckman sp. Zigzagiceratan, pollubnmi. See DXCV

1926 TYPE AMMONITES— VI DCXXIV

Fig- 3 Fig. 2

Fig. I

' Stephanoceras ' SUBPROCERUM, S. BucKMAN, 1892, Holotype

Q.J.G.S., xlvi, 449 ; xiii, 3, 4 ; " [Grange Quarry], Broad Windsor, Dorset "

" Inf. Ool. [upper beds] ; " Manchester Mus., L. 11437, ex S.B., ex Darell, Coll.

S. 65, 41, 38, 34 ; 121, 40, 34, 33 ; ribs c. 44 ; max. c. 210

ZIGZAGICERAS SUBPROCERUM, S. Buckman sp. Zigzagiceratan, pollubrum. See DCXXIII

7926

TYPE AMMONITES— VI

DCXXV

Fig. I

Fig. 2

F'g- 3

COSMOCERAS DUNCANI

" Wolvercote Brickyard, Upper Wolvercote, Oxford ; Oxford Clay " [" Above athleta, possibly one or two feet "—J. P.] ; "M.P.G. Coll. 37480"

s. 37. 40, 35. 21-5 ; 56, 46-5. 34. 23 ; SI. 20-5, 44, 59, 24

BIKOSMOKERAS GEMINATUM, NOV. Kosmoceratan, subtense ; Genotype, Holotype. Cf. DIV

1926

TYPE AMMONITES— VI

DCXXViA

COSMOCERAS DUNCANI

" Wolvercote Brickyard, Upper Wolvercote, Oxford ; Oxford Clay

[" High up, but below lamherti " — C.C.G.] ; "C. C. Gaddum Coll. N0.17W"

S. 63, 43, 32, 22 ; 119, 39, 32, 30 ; max. c. 160

KUKLOKOSMOKERAS KUKLIKUM, nov. Kosmoceratan ktiklikum ; Genotype, Holotype. Cf. DIV

1926

TYPE AMMONITES— VI

DCXXVlB

Fig. I

Fig. 2

Fig. .3

COSMOCERAS DUNCANI

Wolvercote, Oxford ; Oxf. Clay, [high in pit] ; C. C. G. Coll. No. 17 W."

SI. 35, 27'5, 46, 27'5, checked on (/> x 3*2

Last whorl, venter, runcination obsolescent to venter rounded

KUKLOKOSMOKERAS KUKLIKUM, nov. Kosmoceratan, kuklikum ; Genotype, Holotype. Cf. DIV

1926

TYPE AMMONITES— VI

DCXXVII

Fig. I

Fig 2

Ammonites vertebralis " Headington Quarry (Magdalen Pit), Oxford ; " Oxford Oolites " Bottom Course " (derived ?) ; S.B. Coll. 4300, purch. workman S. 61, 41, 47, 26 ; 98, 36-5, 33-5, 35 ; c. 22 ribs ; max. c. 100

SAGITTICERAS CARINIFERUM, nov. Cardioceratan, Sagitticeras ; Holotype. See DC

1926

TYPE AMMONITES— VI

DCXXVIIlA

Fig. I X 104

Fig. 2

Cardioceras cf. suESSi ; S. Buckman, 1925, cit. spec. T.A. V, 51, § XI, 5 ; Cowley (near Industrial School), Oxford Lower Calc. Grit, " from loose sands ; " S.B. Coll., 3149, purch. S. 41, 48, 29, 28 ; 98, 47, 26'5, 23 ; max. c. 250

ANACARDIOCERAS EXPOSITUM, Nov. Cardioceratan, cordatiforme ; Holotype. See CDLXIII

1926

TYPE AMMONITES— VI

DCXXVIIlB

Fig- 4

Fig. I

Fig. 2

Fig- 3

X 3

Cardioceras cf. suESSi, S. BucKMAN, 1925, cit. spec. Cowley, Oxfordshire ; Littlemore Sands ; S.B. Coll. 3149 Inner whorls x 3 ; smooth, uncarinate to c. 5 mm. diam. Subcren.-subcar. to c. 10, costulate to c. 15 ; then (ES, O), ES,0, Li, OV

ANACARDIOCERAS EXPOSITUM, nov. Cardioceratan, cordatiforme ; Holotype. See CDLXIII

1926

TYPE AMMONITES— VI

DCXXIX

X 095

X 09

I

Fig. I

Fig. 2

Cardioceras maltonense " Cowley (near Industrial School), Oxford " ; Oxford Oolites [Lower Calcareous Grit, Dogger in Sands]. S.B. Coll. 3488, purch. S. 49, 45, 325, 20-4 ; 88, 51, 33, 17 ; max. c. 250

ANACARDIOCERAS SECUNDARIUM, Nov. Cardioceratan, excavatuni ; Holotype. See DCXXVIII

1926

TYPE AMMONITES— VI

DCXXX

X 095

X og

Fig. I

Fig. 2

Ammonites excavatus

" Cowley (near Industrial School), Oxford " ; Oxford Oolites

[Lower Calcareous Grit] ; S.B. Coll. 2790, purch. workman Headington

S. 52, 44, 31, 33 ; 90, 52, 30, 19 ; size c. 102 ; max. c. 135

ANACARDIOCERAS DELICATUM, nov. Cardioceratan, excavatum ; Holotype. See DCXXIX

1926

TYPE AMMONITES— VI

DCXXXI

Fig. 2

Fig. I

LUDWIGIA ROMANOIDES

[Sandford Lane], " Sherborne, Dorset ; Inf. Oolite " [Fossil Bed, upper part] ; S. B., ex J. B., Coll. 3922

S. 58, 43, 23, 26 ; 90, 41, 21, 29 ; max. c. 200 Sides subparallel ; venter rounded, strongly carinate

SONNINITES SIMULANS, nov. Sonninian, sauzei ; Holotype. See DXXVIII & CDXXVIII

1926

TYPE AMMONITES— VI

CCCLIV

X 1-32

■It J J.V ^> - -^

Fig. 1

Fig.

Ammonites pectin.\tus, Phillips, Topotype

Shotover Brickyard, Oxford ; Portland Sands

Shotover Grit Sand.s, Dogger of bluish, coarse grit

S.B. Coll. 4297 ; S. 75, 41, 34. 30 ; SI. 28-5, 44, 37. 24

PECTINATITES PECTINATUS, Phillips sp. 1871 Paravirgatitan, peclinatus. Cf. CCCVIII

1926

TYPE AMMONITES— VI

DXCa

X 0-46

Fit;, I a

Fig- 3

\■^^.. 2

Ammonites rotundus

Slab with some 30 specimens, including impressions

Chapmans Pool, Isle of Purbeck, Dorset ; " K.C.," Nodule Bed

S.B. Coll. 4363, purch. at Worth Matravers, Dorset

PALLASICERAS ROTUNDUM, J. Sowerby sp Paravirgatitan, lyditicus ; Topotypes. Cf. CCCLIII

«

1926

TYPE AMMONITES— VI X 0-46

DXCb

Fig- 3

impression

Fig. t

Fig. 2

Fig- 4

Fig- 3

Ammonites rotundus Obverse, DXCa (4363), fig. 5 impr. of a Lyd. ^ibhosus, see DCXXXIX Fig. 4, Possibly Pallasiceras ^racile, Neaverson, 1925 Fig. 1-3, Specimens & impressions, P. roliindum

PALLASICERAS ROTUNDUM, J. Sowerby sp. Paravirgatitan, lyditiciis. Topotypes. Cf. CCCLIII

M

1926

TYPE AMMONITES-VI

DXC c

impression

'•is- 2

Ammonites kotundus

Chapmans Pool ; a, side, b, venter, c, in. whorls (impr.), 3 specimens

" Kim. CI.," Nodule Bed ; S.B. Coll. 4363a ; SI. 18, 41, 37-5, 21

S. 43. 33. 42 ?, — ; 55. 32-5. 39. 44 : 73, 32, 36 ?, 47 ; not eroded

PALLASICERAS ROTUNDUM, J. Sowerby sp. Paravirgatitan, lyditicus ; Topotype. See CCCLIII

1926

TYPE AMMONITES— VI

DCII

iMg.

Fig 2

Ammonites pectin atus Shotover Brickyard (Sandpit), Oxford ; Portland Sands Shotover Grit Sands, coarse grit ; S.B. Coll. 4284 S. 63, 35, 17-5, 30 ; 83, 37, 24, 37 ; ribs 29 on arc (? 54)

KERATIN ITES CORNUTIFER, S. Buckman 1925 Paravirgatitan, pringlei. See DCI

I

1926

TYPE AMMONITES— VI

DCXXXII

tig. X

rig. 2

Fig. 3 X 3

S.S.B.

Ammonites ziphus ; S. Buckman, 1925, cit. spec.

Abs. Proc. G. S., No. 1142, 24 ; Lyme Regis, Dorset ; Lower Lias

[Black Marl, Bed e, Lang, id. p. 22] ; S.B. Coll. 4356, purch.

S. 23-5, 27-5, 59 (38). 53 ; 36. 30-5. 61 (41), 50 ; SI. 7, 86, 79, 32

XIPHEROCERAS ZIPHUS, Hehl-Zieten sp. 1830 Asteroceratan, planicosta. See XXXIX

1926

TYPE AMMONITES— VI

DCXXXIII

k

Pig. I

Fig. 2

S.S.B

Ammonites cordatus

Horton Brickyard, Horton-cum-Studley, Oxfordshire

Upper Oxf. Clay, limonitic cast ; S.B. Coll. 3595, purch.

27, 41, 41, 28 ; 56, 46, 37-5 (33), 27 ; ribs 19 ; (EL, O). Li,

More ribs than Card, cardia, and different proportions

CARDIOCERAS COSTICARDIA, nov. Cardioceratan, cardia ; Holotype. See DCXVI

OV

1926

TYPE AMMONITES— VI

DCXXXIV

" Amaltheus cordatus "

" [Calne], Wiltshire ; Lower Calcareous Grit

" J.W.T. Coll. ; S. 65, 45, 31, 21-5 ; 120, 42-5, 33, 26 "

PACHYCARDIOCERAS ROBUSTUM, Nov. Cardioceratan, excavatiim ; Genotype, Holotype. Cf. CDXX

1926

TYPE AMMONITES— VI

DCXXXV

Fig. I X 56

Fig. 2 X 095

Ammonites excavatus

Cowley, (near Industrial School), Oxford ; Lower Calc. Grit

Littlemore Sands, (T.A. V, 51, 5) ; S.B. Coll. 3360, purchased

S. 53. 47, 34. 22-5 ; 130, 53. 3o, lO'S ; 186, 50, 29, 99

S. 250, 45, 28, 15-4 ; max. c. 253 ; keel, inner whorls, finely serrate

ANACARDIOCERAS DELICATULUM, Nov. Cardioceratan, excavatum ; Holotype. See DCXXX

1926

TYPE AMMONITES— VI

DCXXXVI

X/

Ammonites vertebralis Headington Quarry (Magdalen College Pit), Oxford Bottom Course " ; S.B. Coll. 4419, purch. workman S. 70, 40, 18-5 ?, 28-5 ; 102, 34, 0.17-5, 33 ; ribs 34

VERTEBRICERAS COSTULOSUM, nov. Cardioceratan, V ertebriceras ; Holotype. See DCXIX

7926

TYPE AMMONITES~VI

DCXXXVII

I ►«4

Perisphinctes rotundus

Wheatley Brickyard, Wheatley, Oxfordshire ; Kimmeridge Clay

Nodule Band (Big Stones); S.B. Coll. 3804 ; SI. 29, 52, 52, 34, p. 9

S. 100, 29, 31, 45 ; 146, 29, 32, 48 ; ribs 52 ; max. c. 190 '

ALLOVIRGATITES WOODWARDI, Neaverson, 1925 Allovirgatitan, woodwardi ; Chorotype. Cf. CCCLIII

1926

TYPE AMMONITES— VI DCXXXVIII a

X 0-63

'_^;;j*-*'-

" Perisphinctes dorsoplanus "

(Cf. T.A. IV, 1923, 33, 36) ; Sphindoceras distans, Neaverson, 1925

" Wheatley Brickyard, Oxfordshire ; Kim. Clay, Up. Nodule Bed

" Mus. Pract. Geol. 37483 " ; SI. 47, 52, 53, 34 ; p. 9

ALLOVIRGATITES DISTANS, Neaverson sp. AUovirgatitan, woodwardi ; Topotype. See DCXXXVII

1926

TYPE AMMONITES— VI DCXXXVIII b

X 079

I

Fig. 2

Fig. I

" Perisphinxtes dorsoplanus "

Wheatley Brickyard, Wheatley, Oxfordshire ; Mus. Pract. Geol. 37483

S. 118, 27, 25, 52 ; ribs 49 ; 190, 27, 35, 52 ; ribs, 38 ; max. c. 350 ;

Peripheral ribs sometimes in zigzag style

ALLOVIRGATITES DISTANS, Neaverson sp. Allovirgatitan, woodwardi ; Topotype. See DCXXXVII

1926

TYPE AMMONITES— VI X 0-85

DCXXXIX A

Ammonites rotundus Chapmans Pool, Isle of Purbeck, Dorset ; " Kimm. Clay Nodule Bed, in cliff west of stream, about 15' up S.B. Coll. 4368 ; SI. 59, 76, 66, 42

LYDISTRATITES GIBBOSUS, nov. Paravirgatitan, lyditicus ; Holotype. See CCCLIII

1926

TYPE AMMONITES— VI

DCXXXIX B

X 0-85

Ammonites rotundus

Chapmans Pool ; S.B. Coll. 4368, in situ

Kim. Clay," Nodule Bed = Portlandian Lydite Bed, Bucks

S. (222, 28, 40, 50) ? ; thickness to height, 142 : 100

LYDISTRATITES GIBBOSUS, Nov. Para virga titan, lyditicus ; Holotype. See DCV

1926

TYPE AMMONITES— VI

DCXXXIX c

Fib. I

Fig 2

I

Ammonites rotundus

Chapmans Pool, Isle of Purbeck, Dorset

S.B. Coll. 4368 ; max. c. 390 +

LYDISTRATITES GIBBOSUS, nov. Paravirgatitan, lyditicus ; Holotype. See DCVI

1926

TYPE AMMONITES— VI

CDXII A

X o-6l

I I

r

I

ua't^

^yrt a. 7j£7^ i"^^&^

Fig. 2

Fig. I

SONNINIA CORRUGATA ; S. BUCKMAN, 1889, cit. SpeC.

Geol. Mag., (3) vi, 202, 203 ; 1896, Q.J.G.S., lii, 680, § iv, 5

Dundry (N. Qy., Main Road), Somerset ; S. B. Coll. 1935

S. 108, 46, 28, 19-4 ; 207, 41, 21, 29-4 + K ; max. c. 260

'Attached, Placunopsis aff. gingensis Quen. sp. & fibrosa Laube." J.W.T.

SONNINIA CORRUGATA, J. de. C. Sowerby sp. 1824 Sonninian, propinquans ; Topotype. See CCXCVIII

1926

TYPE AMMONITES— VI Fig. 2b

CDLXXXII*

Fig 2a

Fig. I X 0-56

Fig. 2

Fig- 3

Leptechioceras aplanatum ; S. Buckman, 1924

Euechioceras nobile, T. & W., Trans. R. Soc. Ed., 1925, 706, 725,

"Radstock Grove, Rad.stock, Som. ; base of arniaius ; J.W.T. Coll. 132"

S. 90, 20, 15-5, 60; 197, 17, 13-5, 68; size 218; max. c. 225

EUECHIOCERAS NOBILE, Trueman & Williams Deroceratan, Euechioceras ; Genotype, Holotype. Cf. CDXLIII

1926

TYPE AMMONITES— Vt

DXXXVII*

Fig. 2

Fig I

Ancyloceras calloviensis, Morris, 1845, Syntype Ann. Mag. N.H., xv, 32 ; vi, 3a ; " near Chippenham, [Wilts] " " Kelloway rock " ; " Kelloway, Wilts," C. Pearce lab., brown grit Bristol Museum, Ca. 7353, Chaning Pearce Coll.

PARAPATOCERAS CALLOVIENSE, Morris sp. Proplanulitan, opimus ; Genotype, Lectotype. See V, 33. Cf. CDXCII

7926

TYPE AMMONITES— VI

DCXL

Caloceras aplanatum, Hyatt, 1889, Holotype

Gen. Ariet. p. 147, f. 23, 24 ; Whitby, Yorks ; Jamesoni Bed

Metechioceras, Trueman & Williams, 1925 ; Mus. Cambridge, Mass.

S. (cast) 60, 21, 18, 58 ; 76, 21-5, 17, 62 ; size c. 80, max. ?

Cast and photograph sent by Prof. S. Henshaw

METECHIOCERAS APLANATUM, Hyatt sp. Deroceratan, Metechioceras. Cf. CDLXXXII

1926

TYPE AMMONITES— VI

DCXLI

X 1-5

Fig. I Fig. 2

Fig- 3

S SB.

Hammatoceras dolium, S. Buckman, 1889, Holotype

Q.J.G.S. xlv, 661-663, PI. XXII, 17 ; " Bradford Abbas, Dorset "

" Paving Bed, Murch. zone ; Manchester Mus. (S.B. 576) L11288 "

S- 12, 35, 57, 35, — K ; 21, 36, 40+, 40, — K (— carina or keel) Removal of matrix has disclosed kakomorph ; fig. 2 abnormal side

PARAMMATOCERAS DOLIUM, S. Buckman sp. Ludwigian, planiforme. See DLXXVIII

1926

TYPE AMMONITES— VI

DCXLII

,^^^

WlTCHEl-LIA L^VIUSCULA

Frogden Qy., Oborne, Dorset ; I.O., bed below green grain marl

Q.J.G.S., xlix, 1893, p. 500, § XV, 10 ; S. B. Coll. 2240

S. 58, 48, 27, 22 (+ k) ; 107, 46, 22, 24, (k. present)

RUBRILEIITES RUBER, nov. Sonninian, ruber ; Genotype, Holotype. Cf. CDX

7926

TYPE AMMONITES— VI

DCXLIII

i/€^«

.«■■

$6

^

Ammonites moorei " [Grange Quarry], Broad Windsor, Dorset ; Inferior Oolite Top beds of I.O." [and of quarry] ; S.B., ex Darell, Coll. 864 S. 29, 34-5, 31, 34.5 ; 56, 36, 26, 35-5

PHAULOZIGZAG PHAULOMORPHUS, nov. Zigzagiceratan, zigzag ; Genotype, Holotype. Cf. CLIII

1926

TYPE AMMONITES— VI

DCXLIV

S<rmfi\'^a^ cn,cc^/it.c/

" Ammonites elegans ? " J. Buckman, 1844, cit. spec.

Geol. Chelt., New Ed., p. 71 ; [7 furlongs W. by S. of] " Eyeford "

[Upper Slaughter, Glos] ; " Stonesfield Slate " ; S.B., ex J. B., Coll. 1947

S. 35. 52, 17+. — ; !?>• 58, 16-5+, 6-9; max. c. 165+

Beginning of last whorl, rib-ends suggest micromphalns stage

MICROMPHALITES OXUS, nov. Gracilisphinctean, micromphalus ; Holotype. See CDLIII

1926

TYPE AMMONITES— VI

DCXLV

" Ammonites koenigi " Rampisham, Dorset ; Oxford Clay ; Mus. Pract. Geol. 7685 Ex Darell Coll. ; Proplan. lahoratus, T.A. Ill, 1921, 36 S. 71, 39, 31, 34 ; 117, 37, 28, 37 ; 17 ribs

PROPLANULITES LABORATUS, S. Buckman, 1921 Proplanulitan, majesticus ; Holotype. See CCCXXX

1926

TYPE AMMONITES— VI

DCXLVI

X 1-5

Fig. [

Fig. 2

Fig- 3

J.W.T.

LUNULOCERAS SVEVUM

" Shotover [Summertown], near Oxford ; Oxfordian ; J. W. T. Coll.

" Purch. ex Carter ; S. 19, 37, 21, 37 ; 34, 38, 26, 36 " Less umb., more costulate than L. svevum, Quen., Ceph. viii, i lectotype

LUNULOCERAS GLYPTUM, nov. Kosmoceratan, svevum ; Holotype. See DI

1926

TYPE AMMONITES— VI

DCXLVII

Fig. I X 0-8

Fig. 2a X 09

Fig. 2 X a-8

Kg. 3

CaBDIOCEKAS EXCAVATOf

Headingtoa [Gnrie^'], near Oxford ; Argovian ; J. W. T. Coll. piirdi. " S. 72. 39/30-5, 22 ; 130, 48, 39, 20 " ; max. c. 135

GALECARDIOCERAS GALEIFERUM, sov. Cardioceiatan. exc4tcatuM ; Genotype, IMotype ; Cf. DCXXXIV

1926

TYPE AMMONITES— VI

DCXLVIII

Fig. I

Fig. 2

Ammonites vertebralis

V ertebriceras rachis S.B. 1920, T.A. iii, 16 ; Cowley, near Oxford

Lower Calc. Grit ; S. B. Coll. 2776, purch.

S. 53, 41, 61 (51) 26-5; 80, 35, 50(44), 36; max. c. 90

VERTEBRICERAS RACHIS, S. Buckman, 1920 Cardioceratan, Vertebriceras ; Holotype. See DCXXXVI

1926

TYPE AMMONITES— VI

DCXLIX

Fig. I

Fig. 2a

Fig. 2

Fig. la

Perisphinctes, auriculate, S. Buckman, 1920, cit. spec.

T.A.iii, p.26 ; Cowley (near Industrial School) ; Lower Calc. Grit

" Upper dogger of Sands, Vertehriceras " ; S.B. Coll. 3264

S. 35, 28, 40, 49 ; 60, 30, 30, 50 ; SI. 10, 60, 60, N.30

OTOSPHINCTES OUATIUS, nov. Cardioceratan, Vertehriceras ; Genotype, Holotype. Cf. CCCXXXIII

.1

1926

TYPE AMMONITES— VI

DCL

Fig. 2 xo-73

Fig. I X 0-51

DiCHOTOMOCERAS DICHOTOMUM

Cf. T.A. iii, 1920, p. 10, Tab. ix, 9 & pp. 27, 28 ; Headington Quarry

(Magd. Coll. Pit), Oxford; "well up in Bottom Course," workman

Exogyra Bed merged in B.C. ? ; S.B. Coll. 3513

S. 138, 29, 22, 45 ; 213, 35, 17, 54 ; SI. 39, — , 43+, N. 77

DTCHOTOMOSPHINCTES ANTECEDENS, Salfeld sp. 1914 Perisphinctean, antecedens ; Genotype. Cf. CXXXIX

1926

TYPE AMMONITES— VI

DCLI

Fig. I

Fig. la

Fig, 2

Ammonites pectinatus

Wheatley Brickyard, Oxfordshire ; Portland Sands

Wheatley Sands, cream-coloured, fine grit ; S.B. Coll. 4545

S. 54, 43, c. 19-5, c. 18 ; 78, 47, c. 19, 23 ; horn 28 ; over curve, 34 mm.

KERATINITES PROBOSCIDE, nov. Paravirgatitan, pringlei ; Holotype. See DCII

1926

TYPE AMMONITES— VI

DCLII

Fig. 2

Fig. I

Ammonites devillei

Shotover Brickyard (Sandpit on north), Oxford ; Portl. Sands

Shotover Grit Sands, hard blue grit ; S. B. Coll. 4545, purch.

S. 65, 35, 30, 33 ; 89, 36, 27, 37 ; length of horn 16 mm.

KERATINITES NASO, nov. Paravirgatitan, pringlei ; Holotype. See DCLI

1926

TYPE AMMONITES— VI

DCLIII A

&

nS»*

" CORONICERAS KEELINGI, TuTCHER MS.

" Limefield (Reeling's Quarry), N. of Rockhill Farm,

" Ke5msham, Somerset ; J.W.T. Coll., pres. Mr. Oliver Keeling

" S. 295, 21, 23, 61 ; 439, 24, 25, 60 ; " max. c. 500

KEYNSHAMITES KEELINGI, Tutcher sp. Coroniceratan, rotator ; Genotype, Holotype. Cf. CXXXI

1926

TYPE AMMONITES— VI

DCLITI B

Fig. I

X 028

Fig. 2 N.S.

CORONICERAS KEELINGI, TUTCHER MS.

" Keynsham, Somerset ; J.W.T. Coll. ; Lower Lias Keeling indicated position as lower part of bucklandi beds "

KEYNSHAMITES KEELINGI, Tutcher sp. Coroniceratan, rotator ; Genotype, Holotype. Cf. CXXXI

1926

TYPE AMMONITES— VI

DCLIV

Fig. I

Fig. 3

Stephanoceras commune Middleton Cheney, S.W. Northants ; Up. & Mid. Lias Junction Transition Bed [athleticum] ; S. B. Coll. 4641 S. 45, 28, 22, 51 ; 67, 24, 20, 57 ; max. c. 120

ORTHODACTYLITES DIRECTUS, nov. Harpoceratan, directus ; Genotype, Holotype. Cf. CLVII

1926

TYPE AMMONITES— VI

DCLV

Fig. I

FlK. 2

Ammonites attenuatus, Simpson, 1855, Holotype Foss Yorks. Lias, 51, 54 ; Peak [near Whitby], Yorkshire

Upper Lias, [Jet Rock] ; Whitby Museum, No. iii S. 15, 36, 30, 40 ; 26, 34, 25, 42 ; max. c. 27 Ribs arched over venter ; several ribs entire

MICRODACTYLITES ATTENUATUS, Simpson sp. Harpoceratan, exaratum. Cf. CLVII

1926

TYPE AMMONITES— VI

DCLVl

Ammonites Delicatus (Bean MS.), Simpson, 1855, Syntypes P. 54 ; Whitby, Upper Lias ; Tate & Blake, 1876, p. 174 ' Blue Shale [at top of] Jet Rock Series " ; Whitby Mus. 139 Lectotype ; $. 18, 32, [30], 45 ; max. c. 20

DACTYLIOCERAS DELICATUM, Bean-Simpson sp. Harpoceratan, anguinum {delicatum) . See LXVIII

1926 TYPE AMMONITES— VI DCLVII

Fig. I

X t.21

Fig. 2 Fig- 3

X 126

Dactylioceras ATTENUATUM

" Astrop pits. King's Sutton, Northants ; Up. Lias, subcarinatum z."

" Mus. Pract. Geol. 37972 " ; ribs arcuate over venter

S. 14, 34. 31, 39 ; 23, 30, 26, 45 ; max. c. 40 mm. +

ARCIDACTYLITES ARCUS, nov. Hildoceratan, subcarinatum ; Cf . DCLV

1926

TYPE AMMONITES— VI

DCLVIII

Fi([. I X I' 1 1

Fig. 2

" Dactylioceras braunianum, var. C,"

" Vigo [Brickyard], Northampton ; [Upper Lias, commune zone] "

S.B. Coll. 4636, pres. Mr. B. Thompson, F.G.S.

S. 39, 28, 22, 47 ; 63, 24-5, 19, 55 ; max. c. 65

ZUGODACTYLITES BRAUNIANUS, D'Orbigny sp. 1845 Hildoceratan, braunianus ; Genotype. Cf. LVII

1926

TYPE AMMONITES— VI

DCLIX

Fig- 3

F'g- 4

fig. I

f.^-

Fig, 2

^

WiTCHELLiA L^viuscuLA, mutation, S. BucKMAN 1889, cit. spec.

Q.J.G.S., xlv, 1889, 658 ; Frogden Qy, Oborne, Dorset,

Inf. Ool., sauzei, (Id., xlix, 1893, § xv, 9) ; S.B. Coll. 2255

S. 44, 48, 25, 19 ; 74, 50, 20, 19, (+ k) ; max. c. 100 +

ANOLKOLEIITES PLENUS, nov. Sonninian, sauzei ; Genotype, Holotype. Cf. CDX

1926

TYPE AMMONITES— VI

DCLXa

X o'52

Ammonites banksii, J. Sowerby, i8i8, Holotype

Min. Conch, ii, 229 ; CC ; " Sherborne, Dorset

"Inferior Oolite," Farey, (in Sow.), Sup. Ind., 250; B.M. 43910

S- 143, 33, 94+ (87), 46 ; 241, 28, 61, 49 ; max. c. 255

TELOCERAS BANKSII, J. Sowerby sp. Stepheoceratan, banksii. See CCCL

1926

TYPE AMMONITES— VI

DCLXb

X 0-59

Ammonites banksii, J. Sowerby, i8i8, Holotype

" Sherborne, [Dorset] " ; British Museum (Nat. Hist.) 43910

[Frogden Quarry, Oborne], see S.B., Q.J.G.S., xhx, 1893, § xv, 5

Rather hard ironshot stone, with Belemnites

TELOCERAS BANKSII, J. Sowerby sp. Stepheoceratan, banksii. See CCCL

1926

TYPE AMMONITES— VI

DCLXI A

Fig. 1 X i'o6

Fig. 2 N.S.

COSMOCERAS DUNCANI

" Summertown Brickyard, Oxford ; Oxford Clay " Exact position unknown ; C. C. Gaddum Coll. No. i S."

BIKOSMOKERAS DEFICIENS, nov. Kosmoceratan, subtense ? Holotype. See DCXXV

1926

TYPE AMMONITES— VI

DCLXI B

Fig. I

Fig. 2

Fig. 3

COSMOCERAS DUNCANI

" Summertown Brickyard, Oxford ; C. C. Gaddum Coll. No. i S."

S- 67, 43, 31, c. 22 ; 125, 36, 28, 32 ; max. c. 130 ; SI. 30, 46.5, 63, 34

Fig. I, slight runcination, fig. 2 venter rounded

BIKOSMOKERAS DEFICIENS, Nov. Kosmoceratan, subtense ? ; Holotype. See DCXXV

1926

TYPE AMMONITES— VI

DCLXll

Fig. I

Fig. 2

Cf'

v^^f-

Ammonites intertextus, Simpson, 1855, Holotype

Pp- 35. 50. [Whitby], Yorkshire ; Lias [Drift, ex Oxford Clay]

Whitby Mus. 2415 ; 4>.36-5, 33, 23, 41

PELTOCERATOIDES INTERTEXTUS, Simpson sp. Cardioceratan, arduennensis. See DLXIII

1926

TYPE AMMONITES— VI

DCLXIII A

X 0-51

wm^

k''

Perisphinctes orientalis

Hollow Way, Cowley, Oxford, excavations for houses, 1921

Corallian, [Shell Bed] ; S.B. Coll. 3760, purch. SI. 60, 75, 63, N. 76

PERISPHINCTES COWLEYENSIS, nov. Perisphinctean, marielli ; Holotype. See CCLXXXII

1926

TYPE AMMONITES— VI

DCLXIII B

Fig. I

• '^'S'^mjr^:

Fig. 2

Perisphinctes orientalis Cowley, Oxford ; Corallian ; S.B. Coll. 3760 S. 198, 26, 23-5 54 ; 272, 24, 26, 57 ; max. c. 500 + Fig. 2, venter smooth and almost flat

PERISPHINCTES COWLEYENSIS, nov. Perisphinctean, martelli ; Holotype. See CCLXXXII

1926

TYPE AMMONITES— VI

DCLXIV

Fig. I

Fig. 2

Ammonites devillei

Wheatley, brickyard, Oxfordshire ; Wheatley Sands

S.B. Coll. 4587, ex B.J.B. ; horn 29, over curve, 33 mm.

S. 71, 42, c. 24, c. 24 ; 93, 37'5, c. 23"5, 31. Horn seems to have

been broken off during life and repaired from " break "

KERATINITES NASUTUS, nov. Paravirgatitan, pringlei ; Holotype. See DCLII

1926

TYPE AMMONITES— VI

CXXXVIII c

Fig. I

Fig. 2

Ammonites serpentinus " Cudworth, near Ilminster, Somerset ; heading for water " [Upper Lias] ; Mus. P. Geol. Coll. 37959 ; " si. 24, 36, 54, 25 S. 65, 29, 19, 46 ; 91, 27-5, 17-5, 52 ; size 104 ; max. c. 125

HILDOCERATOIDES SERPENTINUS, Reinecke sp. 1818 Hildoceratan, Hildoceratoides. Cf. CXIV

1926

TYPE AMMONITES— VI

DCLXV

Fig 3 X 1-4

Fig. 2 N.S.

Fig. I X 112

" Lytoceras cornucopia ; B. Thompson, 1891, cit. spec.

" Brit. Assoc. Rep., Geol. p. 6 ; near Arbury Hill, Northants

" Up. Lias, Fish Bed, latescens zone ; B. Thompson Coll."

S. 29, 42, 38, 31 ; 60, 41, 40, 33. SI. subcompact

Granulate ribs approximate, equal, dividing

CRENILYTOCERAS CRENATUM, nov. Harpoceratan, crenatum ; Genotype, Holotype. Cf. CCCXCI

7926

TYPE AMMONITES— VI

DCLXVI

FlK.

Fig. I

" Lytoceras cornucopia ; B. Thompson, 1896, cit. spec.

" Proc. Geol. Assoc, xiv, p. 426 ; near Woodford Halse, Northants

" Up. Lias, Ceph. Bed inconstant, above Fish Bed ; B. Thompson Coll."

S. 43, 42, c. 30, 33 ; 79, 47, 36, 28 ; 116, 46, 35, 32

Granulate ribs distant ; SI. wide-spreading

ORCHOLYTOCERAS METORCHION, nov. Harpoceratan, metorchion ; Genotype, Holotype. Cf. CDXL

7926

TYPE AMMONITES— VI

DCLXVII

Fig.

Fifj. I

Ammonites hildensis. Young & Bird, Topotype

(Geol. Yorks., 1822, pp. 247, 327 ; xii, i) ; Whitby, Yorkshire

[Upper Lias, Alum Shale] ; Chamber's Institution, Peebles, Coll.

S. 72, 33-5, 22, 42 ; 118, 27, 18, 49 ; with mouth

HILDOCERAS HILDENSE, Young & Bird sp. Hildoceratan, hifrons. See CXIV

1926

TYPE AMMONITES— VI

DCLXVIII A

DUMORTIERIA RHODANICA ; S. BUCKMAN, I905, cit. SpCC.

Mon. I.O. Amm., Sup. p. clxxix ; Penn Wood, Stroud, Glos

Ceph. Bed above Cotteswold Sands, mid. pt., Diimortieria rj

S.B. Coll. 1219. Interior pt. of mouth & indie, ventral lappet

DUMORTIERIA RHODANICA, Haug, 1887 Dumortierian, novata. Cf. DLXXIII

1926

TYPE AMMONITES— VI

DCLXVIII B

yi^ji^

AeiTin

J^d

Cciyiiia jfee/^/e

Fig. 2

Fig. I

DUMORTIERIA RHODANICA ; S. BUCKMAN, I905, cit. SpCC.

Penn Wood, Stroud, Gloucestershire ; S.B. Coll. 1219 S. 58, 33, 24, 40-5 ; 95, 33, 20, 43 ; 155, 28, 18, 49 Max. c. 157. Keel disappears at end of whorl

DUMORTIERIA RHODANICA, Haug, 1887 Dumortierian, novata. Cf. DLXXIII

J926

TYPE AMMONITES— VI

DCLXIX

Fig. 2

Fig. I

X 058

SONSINIA ADICRA

" Sandford Lane, Sherborne, Dorset ; I.O., Foss. Bed, mid. part (Q.J.G.S., xlix, 1893, 494, ' Sonninia ') ; S.B. Coll. 1537 S. 122, 37, 35(31), 36 ; 220, 36, 37(31), 38 ; max. c. 260 Waagen's fig. without test : this has thick test

SHERBORNITES .\DICRUS, Waagen sp. 1867 Sonninian, Shirbuirnia ; Holotype. See CDXXVII

1926

TYPE AMMONITES— VI

DCLXX

Fig. I

I"ig. I a

Fl2. 2

Fig. 2a

Oppelia subradiata

Frogden Quarry, Oborne, Dorset ; I.O., [Koadstonc, upper part]

Cf. Q.J.G.S., xlix, 1893, 500, § XV, 4 ; S. B. Coll. 4674, purch. f

S. 18-5, 48-5, 27, 27 ; 35-5, 43, 21, 23

OPPELINA PULCHRA, nov. Stepheoceratan, Leptosphindes ; Genotype, Holotype. Cf. CDLXXVIII

1926

TYPE AMMONITES— VI

DCLXXI

Fig. I

Fig. 2a

Fig. 2

Fig. i;i

Oppelia (umbilicate sp.), S. Buckman, 1893, cit. spec.

Q.J.G.S., xlix, 1893, 497, § XIII, 8 ; Lower Clatcombe

Sherborne, Dorset; Inf. Ool., Niortensis; S.B. Coll. 4675

S. 21-5, 42, 25-5, 28 ; 37, 36-5, 21, 30-5

OPPELINA UMBILICATA, nov. Stepheoceratan, umhilicata ; Holotype. See DCLXX

1926

TYPE AMMONITES— VI

DCT.XXII

X 07

Fig. I

Fig. 2

" RiNGSTEADIA PSEUDO-YO "

" Wootton Bassett, Wiltshire ; Kimm. Clay ; J.W.T. Coll. " S. 104, 46, 25, 14 ? ; 170, 48-5, 27, 16 ; 180, 47-5, 27-5, 17 ; " max. c. 330 " Apert. outline at 180." (/?. pseudo-yo, Salfeld, viii, i, lectotype)

RINGSTEADIA SPHENOIDEA, nov. Ringsteadian, brandesi ; Holotype. See DLXXXIX

1926

TYPE AMMONITES— VI

DCLXXIII

Copy of Prototiriifyh

Ammonites biplex ; Damon, i860. Fig. Spec.

Sup. Geol. Weym. ix, 9 ; A. kimmeridiensis, Seebach, 1864, Holotype

Hann. J. 156, 157 ; Weymouth, Dorset ; Kim. CI. [White Sept. Band]

F. 40, 30, — , 45 ; 61, 28, — , 51 ; ribs 27. Lacks constrictions ?

HOLCOSPHINCTES KIMMERIDIENSIS, Seebach sp. Holcosphinctean, pallasioides. See DLXIX

1926

TYPE AMMONITES— VJ

DCLXXIV A

Fie.' I

Ammonites rotundus Chapmans Pool, Isle of Purbeck, Dorset ; " Kimm. Clay " Nodule Bed, south of stream, about lo' up S.B. Coll. 4374; SI. 49, 49, 47, 29; Max. c. 290

LYDISTRATITES TRIGONALIS, nov. Paravirgatitan, lyditicus ; Holotype. See DCXXXIX

1926

TYPE AMMONITES— VI

DCLXXIV B

Fig. I X 0-5

Fig. 2 at A,

N.S.

Ammonites rotundus

Chapmans Pool, Dorset ; S. B. Coll. 4374

S. 158, 31, 39, — ; thickness to height, 115 : 100

S. 185, 30, 35, — ; t. to h. 118 : 100 ; S. 249, 30, 34, 49 ; 114 : 100

LYDISTRATITES TRIGONALIS, nov. Paravirgatitan, lyditicus ; Holotype. See DCXXXIX

1926

TYPE AMMONITES— VI

DCLXXV

Fig. I

%

Fig. la

f:

«

^dii.

Perisphinctes scythicus, Michalski (1890, Mem. Com. Geol. viii, vii, i) ; Hounstout, Kingston, I. of Purbeck Portland Sand, [Massive Bed, base] ; S.B. Coll. 4647, per E.M.B. S. (58, 42, 33, 42 ; 79, 42, — , 39) ? Fig. la, details emphasized

VIRGATITES SCYTHICUS, Michalski sp. Virgatitan, scythicus. Cf. DXXXVI

1926

TYPE AMMONITES— VI

DCLXXVI

X 0-46

Ammonites biplex Long Crendon (N.W.), Bucks ; Portl., Glauc. Beds, Waterstone S.B. Coll. 4248 ; S. 174, 29, — , 47 ? ; 277, 25, 30 ?, 52 ? Primaries short ; lacks constrictions of Aquistratites

HYDROSTRATITES BIFURCUS, nov. Behemothan (i), aquator ; Genotype, Holotype. Cf. DCLXXIII

1926

TYPE AMMONITES— VI

DCLXXVII

Fig. 2

Fig. I

Ammonites biplex

Hounstout Cliff, Kingston, I. of Purbeck, Dorset

Portland Sands, White Cement Stone ; S.B. Coll. 4649

Pres. C. H. Waddington ; S. 95, 35, c. 33, 48 ; 152, 31-5, 33-5, 50

Ribs smaller and closer than in Leticopetrites lencus

LEUCOPETRITES C^MENTARIUS, nov. Behemothan, lencus ; Holotype. See CCCVII

1926

TYPE AMMONITES— VI

DLXII A

Wheatleyites pringlei

Shotover Brickyard (north side), Oxford ; Portland Sands

Shotover Grit Sands, blue grey grit (dogger) ; S.B. Coll. 4540

SI. 48, 42, 42, 23. LI. broader stems than Shot, pringlei (type)

SHOTOVERITES PRINGLEI, S. Buckman, 1925 Paravirgatitan, pringlei. See CCCLXXXIV

1926

TYPE AMMONITES— VI

DLXII B

Fig 2

Fig. 1

Wheatleyites PRINGLEI Shotover, Oxford ; Shotover Grit Sands ; S.B. Coll. 4540

S. (168, 29, 27, c. 46) estimated. More advanced than Wheat, pringlei, Pruvost, 1925, 11, i ; see T.A. VI, 24, 25, 29

SHOTOVERITES PRINGLEI, S. Buckman, 1925 Paravirgatitan, pringlei. See CCCLXXXIV

1926

TYPE AMMONITES— VI

DLXXX

Fig. I

Fig. 2

Fig- 3

WlTCHEI-LIA SUTNERI Frogden Quarry, Oborne, Dorset ; I.O., green marl Bed 9, saiizei-Witchellia ; S. B. Coll. 2268 S. 46-5, 40, 36-5, 28 ; 93, 47, 29, 22-5

WITCHELLIA PLATYMORPHA, S. Buckman, 1925 Sonninian, Witchellia ; Paratype. See DLVl

7926

TYPE AMMONITES—VI

DCLXXVIII

Fig. I

Kg- 3

X 053

Ammonites bucklandi costaries

" Clandown Colliery Qy., Radstock, Som. ; Lower Lias, Eugassiceras

" Spiriferina Bank, derived ; not so early as bucklandi ; J.W.T. Coll.

" S. 140, 235, 21 {17), 59 ; 211, 24, 19 (15), 57 " ; max. c. 250

PRIMARIETITES PRIMITIVUS, nov. Coroniceratan, gmuendense ; Genotype, Holotype. Cf. DLXXI

1926

TYPE AMMONITES— VI

DCLXXIX

Fig. I

9

Fig. 2 ^

Ammonites nanus, Simpson, 1855, Holotype

Foss. York.sh. Lias, 38, 39 ; [near Whitby] " probably Lower Lias '

Whitby Museum, No. 472. F. 6-5 (13), 46, 46, 31

TRAGOPHYLLOCERAS NANUS, Simpson sp. Liparoceratan, Beaniceras. See CCXIX

1926

TYPE AMMONITES— VI

DCLXXX

Fig.

Fig. 2

^>*'^^^-A?,i

Fig. la X 14

Lytoceras cornucopia ; B. Thompson, 1891, cit. spec.

"Brit. Association Report, Geol. p. 6 ; Catesby, Northamptonshire

" Up. Lias, Fish Bed, latescens zone ; B. Thompson Coll."

S. 32-5, 40, 34-5, 34-5 ; 59, 41, 35-5, 35. SI. subcompact

Crenulate ribs fine, approximate, equal, dividing

CRENILYTOCERAS FORMOSUM, nov. Harpoceratan, crenatum ; Holotype. See DCLXV

1926

TYPE AMMONITES— VI

DCLXXXI

Fig. 2 X 135

Fig. I X 094

Lytoceras cornucopia ; B. Thompson, 1896, cit. spec.

" Proc. Geol. Assoc, xiv, p. 426 ; near Woodford Halse, Northants

" Up. Lias, Ceph. Bed inconstant, above Fish Bed ; B. Thompson Coll."

S. 64, 39, 31, Z2, ; 142, 44. c. 34, 36. SI. wide-spreading Crenulate ribs subdistant, with intermediaries ; later more approx.

ORCHOLYTOCERAS APPROPINQUANS, nov. Harpoceratan, metorchion ; Holotype. See DCLXVI

7926

TYPE AMMONITES— VI

DCLXXXII

Fig. I

Fig. 2

Harpoceras FALCIFERUM

" Barrington (upper quarry), near Ilminster, Somerset

" Upper Lias, Bed 23 ; Mus. Pract. Geol. Coll. 31620 "

S. 27, 41, 28, 28, + K ; 57, 43, 26, 30, + K

HARPOCERAS FALCULA, nov. Harpoceratan, falcula ; Holotype. See IV

1926

TYPE AMMONITES— VI

DCLXXXIII

Fig. I

Fig. 2

Fig 3

Ammonites fibulatus, J. de C. Sowerby, 1823, Topotype

(Min. Conch, iv, 147, ccccvii, 2) ; Whitby, Yorkshire ; Upper Lias

[Alum Shale, Cement Shale] ; S.B. Coll. 3809, p.urch.

S. 53, 24, 23, 49; 77, 22-5, 22, 57; max. c. 80

PERONOCERAS FIBULATUM, J. de C. Sowerby sp. Hildoceratan, fibulahnn. Cf. DCLVIII

1926

TYPE AMMONITES— VI

DCLXXXIV

Fig. r

^S3

Fir. I a

Fig. 2

Fig. 2a Nat. Size

X ' 4 t

Grammoceras SOLONIACENSE

Vigo Brickyard, Northampton, Up. Lias, commune zone

[" Cerithium Beds," B. Thompson] ; S.B. Coll. 4635

S. 17-5, 41, — , 28-5 ; 27-5, 36, 32-5. 33 ; ventral lappet 9 mm.

Diff. G. soloniacense, Lissajous, (i, 5, lectot.), proportions and sulcation

MACONICERAS VIGOENSE, nov. Hildoceratan, vigoense ; Genotype, Holotype. Cf. DCLXXXII

1926

TYPE AMMONITES— VI

DCLXXXV

Fig. 2

■Fig. t

HiLDOCERAS SEMIPOLITUM,

Nailsworth, Glos, excavation for gasometer ; Upper Lias

Base of Cotteswold Sands, grey stone ; S.B. Coll. 4435

S. 87, 33, — , 39 ; 143, 30, 19, 45 ; part of mouth

HILDOCERAS SEMICOSTA, nov. Hildoceratan, semipolitum ; Holotype. See DCLXVII

1926

TYPE AMMONITES— VI

DCLXXXVI

Fig. I

Fig. -2

Grammoceras striatulum ; S. Buckman i88g, cit. spec. Q.J.G.S., xlv, p. 444, § II, 8 [base of] ; Coaley Wood, Uley Bury, Glos Lower part of Cephalopod Bed ; S.B. Coll. 4711 S. 44, 32, 25, 39 ; 76, 29, 30, 47 ; SI. longilobate

COSTIGRAMMOCERAS COSTIGERUM, Nov. Grammoceratan, thottarsense ; Genotype, Holotype. Cf, DLXXIII

7926

TYPE AMMONITES— VI DCLXXXVII

Fig. 2

Fig. I

Ammonites l^viusculus Dundry, Somerset ; I.O., [Lower White Ironshot] Cf. Q.J.G.S. lii, 676, § I, 6 ; S.B. Coll. 271, ex E. Wilson S. 50, 44, 25, 24 ; 95, 42, 22, 25, I- K ; max. c. 98

DUNDRYITES ALBIDUS, NOV. Sonninian, mollis ; Genotype, Holotype. Cf, CLXXXI

1926

TYPE AMMONITES— VI

DCLXXXVIII

Fis

WiTCHELLIA SUTNERI ; S. BUCKMAN, 1893, cit. SpeC.

Q.J.G.S., xlix, p. 500, § XV, 9 ; Frogden Quarry, Oborne, Dorset I.O. green marl ; satczei-WitchelUa ; S. B. Coll. 2271 S. 53, 41, 29, 31, + K ; 98, 43, 23-5, 30-5, + K ; max. c. 103 Diff. H. sutneri, Branco, more falc, approx. ribs, longer L2

WITCHELLIA FALCATA, Nov. Sonninian, Witchellia ; Holotype. See DXCIV

1926

TYPE AMMONITES— VI

DCLXXXIX

Fig. I a

Fig. I

Fig. 2

WiTCHELLlA SUTNERl

Frogden Quarry, Oborne, Dorset ; I.O., green marl bed

Sauzei-Witch. ; S.B. Coll. 2257 ; differs sutneri falcate ribs

S. 39, 44, 27, 30 ; 72, 43, 26, 28 ; max. c. 95

WITCHELLIA ACTINOPHORA, NOV. Sonninian, Witchellia ; Holotype. See DCLXXXVIII

1926

TYPE AMMONITES— VI

DCXC

Fis. 3 X 1-32

Fig, I

Fig. 2

Cardioceras vertebrale Horton Brickyard, Horton-cum-Studley, Oxfordshire Oxf. CI. ; S.B. Coll. 4306, purch. ; (EL, O), Li, OV S. 17, 41, 47, 22 ; 38-5, 44, 43 (36), 27 ; 17 ribs

CARDIOCERAS QUADRARIUM, nov. Cardioceratan, cardia ; Holotype. See DCXXXIII

1926

TYPE AMMONITES— VI

DCXCI A

Cardioceras excavatum

Cowley, near Industrial School (S. of Horspath Road), Oxford

[Dogger of Lower Calc. Grit] ; S.B. Coll. 3404, purch.

S. 24-5, 45, 28-5, 28-5 ; 73, 46, 24-5, 205 ; 133, 53, 34-5, 15

ANACARDIOCERAS SERRIGERUM, NOV. Cardioceratan, excavatum ; Holotype. See DCXXXV

1926

TYPE AMMONITES— VI

DCXCI B

Fig. I X 0-82

Fig. 3

Fig. z

X 2-7

Cardioceras EXCAVATUM Cowley, Oxford ; Lower Calc. Grit ; S.B. Coll. 3404 Figs. 2, 3, inner whorls out of the specimen Fig. 3 with part of umbilical infilling attached

ANACARDIOCERAS SERRIGERUM, nov. Cardioceratan, excavatnm ; Holotype. See DCXXXV

7926

TYPE AMMONITES— VI

DCXCII

Fig. .1

I^g- 3

Fig, 2

" ? AuLACosPHiNCTES coNTiGUUS, [S.B.], Pringle, 1926, cit. spec. ' Geol. Oxf, . Ed. 2 (Mem. Geol. Surv.), 68, nodule at base, bed [2 up] Chawley Brickyard, Cumnor Hurst, Berks ; M.P.G. Coll. 37486 " S 55. 34-5. 30, 34 ; 96, 31. 28, 45 ; max. c. 180 + SI. 19, 47, 47, 26 ; 26, 45, 49, 30. Venter subruncinate

ALLOVIRGATITES TUTCHERI, Neaverson, 1925 Allovirgatitan, woodwardi. See DCXXXVIII and p. 16

I

1926

TYPE AMMONITES— VI

DCXCIII

z^'

Ammonites pallasianus, d'Orbigny (Russ. 1845, 427 ; XXXII, I, 2) ; T.A., VI, p. 31, 32 ; Hounstout Kingston, Isle of Purbeck, Dorset ; Portl. Sands, Massive Bed S.B. Coll. 4660 ; S. (53, 31, -, 44) ?

VIRGATITES PALLASIANUS d'Orbigny sp. Virgatitan, scythicus. See DCLXXV

i

1927

TYPE AMMONITES— VI

LXVIII A

X 1-36

Fig.

Fig. 2

Ammonites vermis, Simpson, 1855

(F. Yorks. Lias, 51) ; " Barrington Quarry, Somerset ; Upper Lias, Bed 20 '

Cf. Q.J.G.S., Ixxviii (1922), pp. 449 et seqq. ; " M.P.G. Coll. 38016 '

S. 25, 24, 24, 56 ; 33. 25, 21, 57 ; max. c. 36

VERMIDACTYLITES VERMIS, Simpson sp. Hildoceratan, vermis. See T.A. vi, 1926, 42

I

1927

TYPE AMMONITES— VI

DIlA

Ammonites lonsdalii, Pratt, 1841, Topotype

(Ann. Mag. N.H. viii, 164) ; " Christian Malford, Wiltshire

'Oxford Clay, [Christian Malford Beds]; M.P.G. Coll. 30562'

S. 48, 50, — , 21 ; 104, 50, — , 20 ; max. c. no

I,UNULOCERAS LONSDALII, Pratt sp. Kosmoceratan, acutistriatum. See DI

i

1927

TYPE AMMONITES— VI

DViA

Ammonites discus Blackthorn Hill, (Qy. N. of Bicester-Aylesbury Road) Bicester, Oxen ; Lower Cornbrash ; S.B. Coll. 4117, purch. S. 53, 58, c. 26, c. 6-6 ; no, 58, c. 23, 4'5 [o ?] ; max. 170+ Without test. Li more projected than in DVI

CLYDONICERAS DISCUS, J. Sowerby sp. 1812 Clydoniceratan, discus. Cf. D & Vol. v, 29

K

1927

TYPE AMMONITES— VI

DCXXXIX D

Fig 2

F'g- 3

Ammonites uotundus Chapmans Pool, Isle of Purbeck, Dorset Kimmeridge Clay [Nodule Bed] ; S.B. Coll. 4366, pres. Miss E. R. Thompson S. (185, 26, 35-5, ~, est.) ; width to height, 136 : 100 ; SI. 47, 64, 62, 38 Fig. 2, note effect of foreshortening on inner lobule of Li

LYDISTRATITES GIBBOSUS, S. Buckman, 1926 Paravirgatitan, lyditicus ; Paratype. See CCCLIIl

II

1927

TYPE AMMONITES— VI

DCXCIV

Fig. I

^'8- 3

J:^/,r,

Fig. 2

xi-75

Plesechioceras delicatum ; Trueman & Williams, 1925, Genotype cit.

Echioc. ; Trans. R. S. Edinburgh, liii (3), 706, 722, 736

Newton Quarry, Paulton, Somerset ; Armatus Beds

J.W.T. Coll., No. G. 17 ; " S. 34, 24, 20, 53 ; 49, 22, 185, 61," J.W.T.

PLESECHIOCERAS TYPUS, Nov. Deroceratan, Plesechioceras ; Genotype, Holotype. Cf. CDXLIII

192'/

TYPE AMMONITES— VI

DCXCV

•'-• xis-si

Fig. I

Fig. 2

Pleurechioceras DEClDUUM ; Trueman & Williams, 1925, Genotype Echioc. ; Trans. R. S. Edinburgh, liii (3), 719 Kilmersdon Colliery Qy., Radstock, Somerset, J.W.T. Coll. G 33 " S. 55, 22'5, 20(17), 60; 80, 20, 19(16), 63," J.W.T.

PLEURECHIOCERAS TYPICUM, NOV. Deroceratan, Plesechioceras ; Genotype, Holotype. Cf. DCIX

I

1927

TYPE AMMONITES— VI

DCXCVI

Fig. I

Fig. 2

Leptechioceras planum, Trueman & Williams, 1925, Holotype

Echioc. ; Trans. R. S. E., liii (3) 731, 705, fig. 3I; 11, 5

Clandown Quarry, Radstock, Som. ; Armatus Bed ; J.W.T. Coll. H. 14

" S. 36, 19-5, 14, 61 ; 48, 19, 14-5, 65," J.W.T.

LEPTECHIOCERAS PLANUM, Trueman & Williams Deroceratan, planum. See CDXLII

I

1927

TYPE AMMONITES— VI

DCXCVIl

Fig. I

Fig. 2

Fig, 3a

Fig- 3

EUECHIOCERAS ANGUSTILOBATUM, TrUEMAN & WiLLIAMS, 1925, Holotype

Echioc. ; Trans. R. S. Edinburgh, liii (3), 726, 736

Kilmersdon Colliery Quarry, Radstock, Somerset ; Armatus Bed

J.W.T. Coll. H. 134; " S. 84, 19, 15-5. 63 ; 118. 18, 16, 68," J.W.T.

STENECHIOCERAS ANGUSTILOBATUM, T. & W. sp. Deroceratan, Eiiechioceras ; Genotype. Cf. XCVI

1

1927

TYPE AMMONITES~VI

DCXCVIII

Fig. I

Fig. 2

Fig. 3

Ammonites cf. kurrianus ; S. Buckman, 1922, cit. spec. Q.J.G.S. Ixxviii, 394 ; Thorncombe Beacon, Bridport, Dorset Marlstone, c. 9" below top of Pleurotomaria bed ; S.B. Coll. 4608 S. 138, 45, 17, 27. EL very short ; ace. lobe in ES, long & large

PLATYHARPITES PLATYPLEURUS Amaltheian, arbutus ; Genotype, Holotype. Cf. CCCLXIII

It

1921

TYPE AMMONITES— VI

DCXCIX

Fig. I

r^:

Fig. 2

Fig- 3

Dactylioceras helianthoides, Yokoyama, 1904

(Jur. Amm. ; Journ. Sci. Coll. Tokyo, xix, 16 ; vi, 4, lectotype)

Barrington Quarry, Somerset ; Upper Lias, Bed 6 ; M.P.G. Coll. 38013'

S. 26, 30, 49-5, 49-5 ; 48-5, 28, 33, 45-5 ; size 54 ; max. c. 60

XEINODACTYLITES HELIANTHOIDES, Yokoyama sp. Harpoceratan, Harpoceratoides [helianthoides) ; G.T, See T.A. vi, 41

^

1927

TYPE AMMONITES— VI

DCC

Ammonites annulatus, J. Sowerby, i8ig ; Chorotype

(Min. Conch., iii, 41 ; ccxxii, 5, Oppel's lectotype, Juraf. 1856, p. 255)

" Barrington Quarry, Somerset ; Upper Lias, Bed 18/19 "

" M.P.G. Coll. 38302 " ; S. 50, 27, 30, 52 ; 78, 22-5, 23-5, 59

DACTYLIOCERAS ANNULATUM, J. Sowerby sp. HarfKjceratan, falciferum. Cf. CLVII and see T.A. i, p. v

1927

TYPE AMMONITES— VI

DCCI

FiR. I

Fig.

Ammonites fibulatus

Whitby, Yorkshire ; Upper Lias, [Alum Shale, Cement Shale]

S.B. Coll. 4722 ; S. 32, 28, 25, 43-5 ; 43"5. 26, 23, 53

Size c. 47 ; max. c. 77. Prefibulate stage

PERONOCERAS PR^.POSITUM, nov. Hildoccratan, fibulaiiini ; Holotype. See DCLXXXIII

i

i

7927

TYPE AMMONITES— VI

DCCII

Fig. I

Fig. 2

Ammonites humphriesianus ; H. B. Woodward, 1894, cit. spec.

Low. Ool. (Jur. Rocks iv) ; Mem. Geol. Survey, p. iii ; " Rodboro' "

rStroud, Glosj," (R. Tate), [Dundry, Som. ; Lower White Ironshot]

S.B. Coll. 3923, ex Prof. Tate Coll., pros. H.B.W. ; [Tate's loc. wrong]

S. 25, 41, 68, 28 ; 43, 42, 53, 30 ; max. c. 75. Ribs c. 5 to i

EMILEITES MALENOTATUS, nov. Sonninian, mollis ; Genotype, Holotype. Cf. CDXIV

I

I

1927

TYPE AMMONITES— VI

DCCIII

Cardioceras sp., S. Buckman, 1925, cit. spec. T.A. V, p. 65 ; Jordan Cliff, Preston, Weymouth, Dorset Oxford Clay, Jordan Cliff Beds; S.B. Coll. 4254 S. 29, 48, — , 22-5 ; 55, 46, 29, 27

CARDIOCERAS ANACANTHUM, nov. Cardioceratan, cardia ; Holotyjie. See DCXC

1927

TYPE AMMONITES— VI

DCCIV

Fis.

Fig. I a

Fis

Ammonites cordatus var. excavatus, H. B. Woodward, 1895, cit. spec.

Jur. Rocks, V, 56 ; also Huxley, Cat. Foss. M.P.G., 1865, p. 241

" Walton Cutting, [near Wood Walton, N. of] Huntingdon, Oxf. Clay "

[Kimm. Clay]. " M.P.G. Coll. 30379 " ; (EL, o) ; EL, O ; Li, OV

S. 53. 45'5. 40, 28-5 ; 115, 44, 39, 23, +K ; max. c. 175+

PRIONODOCERAS TRUCULENTUM, nov. Prionodoceratan, prionodes ; Holotype. See CDLXIV

1927

TYPE AMMONITES—VI

DCCV

X 073

Ammonites pectinatus

Wheatley, Brickyard, Oxfordshire ; Portland Sands

Wheatley Sands ; S.B. Coll. 4316

S. (no, 35-5, 27, 37, est.) ; 195, 31, 24-5, 45 ; max. c. 260

On venter intermittent projected ribs indicate incipient " horns "

PECTINATITES SCALARIFORMIS, nov. Paravirgatitan, pectinatus ; Holotype. See CCCLIV

1927

TYPE AMMONITES— VI

CXXXVa

Fig. I

Fig. 2

Fig. 3

Sph^roceras PEREXPANSUM [Clatcombe], " Sherborne, Dorset ; Inf. Ool., [humphriesianum zone] S.B., ex Darell, Coll. 1264 ; shows mouth — furrow and lip S. 41-5, 52, 76, 22 ; 72, 35, 47, 31-5 ; max. 73

LABYKINTHOCEKAS INTRICATUM, S. Buckm.\n, 1919 Sonninian, Lahyrinthoceras ; Paratype. See CXXXIV

I

¥

7927

TYPE AMMONITES— VI

CLVllA

I

Fig. I

Fig. 2

Fig. 3 X i'46

Ammonites tenuicostatus

Whitby, Yorkshire ; Upper Lias [Grey Shales] ; S.B. Coll. 4712 purch.

S. 44, 25"5, 25, 52 ; 66, 22"5, 20, 56 ; size c. 69 ; max. c. 90

Inner whorls smooth. See T.A. vi, December, 1926, p. 41

TENUIDACTYLITES TENUICOSTATUS, Young & Bmu sp., 1822 Harpoceratan, tenuicostatus ; Genotype.

1927

TYPE AMMONITES— VI

DCCViA

^'^- ^ ^^

Fig. I X 0-88

Ammonites planicosta

Lyme Regis, Dorset ; Lower Lias, [planicosta bed]

S.B. Coll. 4460, purchased ; bituberculate form

S. 70, 30, c. 34(24), 50 ; 108, 31, c. 31(27). 49'5 ; 226, 20-5, c. 22(20), 46

XIPHEROCERAS BINODULATUM, NOV. Asteroceratan, planicosta ; Holotype. See DCXXXII

7927

TYPE AMMONITES— VI

DCCVlB

Fig. I

Fig. 2

Ammonites planicosta Lyme Regis, Dorset ; Lower Lias, [planicosta bed] S.B. Coll. 596, purchased ; bituberculate form S. 36, 28, 42 (29), 51-5 ; 54. 28, 34-5 (30), 52 ; size c. 60

XIPHEROCERAS BINODULATUM, nov. Asteroceratan, planicosta ; Paratype. See DCXXXII

1927

TYPE AMMONITES— VI

DCCVII

Dactylioceras commune

Whitby, Yorkshire ; Upper Lias, [Alum Shale] ; S.B. Coll. 4713, purch.

S. 44, 26-5, 28, 47-5 ; 64-5, 2475, 2475, 55 ; max. c. 70

See T.A. vi, Feb., 1927, p. 43

KOINODACTYLITES COMMUNIS, J. Sowerby sp., 1815 Hildoceratan, bifrons ; Genotype. Cf. DCC

1927

TYPE AMMONITES— VI

DCCVIII

Fig. I

Fig. 2

Dactylioceras commune Whitby, Yorkshire ; Upper Lias, [Alum Shale or above] S.B. Coll. 4724, purch. ; S. 52, 25, 26, 60 ; 79, 20-25, i9- 62 Has mouth. See T.A. vi, Feb., 1927, p. 43

CURVIDACTYLITES CURVICOSTA, S. Buckman Hildoceratan bifrons ; Genotype, Holotype. Cf. DCLVII

i

i

1927

TYPE AMMONITES— VI

DCCIX

Fig. 2

Fig. I

X 0-495

SoNNiNiA, mammillate sp., S. Buckman, 1893, cit. spec.

Q.J.G.S., xlix, 494 ; Sandford Lane Qy., Sherborne, Dorset

Fossil Bed, lower part ; S.B. Coll. 998. [Am. arenatus, Quen.

Amm. Sch. J., ii, 482 ; lx, 10, has si. degenerate)

S. 154, 41, 25-5, 28-5 ; 274, 37-5, 27-5 + test (23— t.), 37; max. c. 300

PREPAPILLITES ARENATUS, Quenstedt sp., 1886 Soijninian, Shirbuirnia. Cf. CL.

It

1927

TYPE AMMONITES— VI

DCCXa

Ammonites brocchii, J. Sowerby, i8i8, Holotype

Min. Conch., ii, 233 ; ecu ; " Sherborne, Dorset ; Under Oolite "

See Farey, Sup. Ind. M.C. ii, 250 ; B.M. (N.H.) Coll. 43906a

Matrix hard, grey, slightly ironshot, with glauconitic inclusions

EMILEIA BROCCHII, J. Sowerby sp. Sonninian, brocchii ; Genolectotype. See CDXIV

1927

TYPE AMMONITES— VI

DCCXb

Fig. I

Fig. 2

^^■^^5.

'Sr-k

Ammonites brocchii, J. Sowerby, i8i8, Holotype

Sherborne, Dorset ; Under Ool." ; Brit. Mus. (Nat. Hist.), 43906a

Not Sandford Lane Qy., but = lower middle part of its Foss. Bed

S. 75, 45, 72, 21 ; 126, 38-5, 56, 26 ; max. c. 220

SI. (plane) 42, 77, 88, 48 ; (over curve, fig. 2), 67, 49, 57, 31-5

EMILEIA BROCCHII, J. Sowerby sp. Sonninian, brocchii ; Genolectotype. See CDXIV

7927

TYPE AMMONITES— VI

DCCXc

Sph^roceras brocchi ; S. Buckman, 1893, cit. spec. Q.J.G.S., xlix, 494; rSandford Lane], "Sherborne, Dorset" Inf. Oolite," [mid. part of Fossil Bed] ; S.B., ex J.B. Coll., 2058 S. 77' 45-5. 71. 21 ; 132, 40. 57-5. 28 ; max. c. 240

EMILEIA BROCCHII, J. Sowerby sp., 1818 Sonninian, brocchii ; Genosyntype. See CDXIV

1927

TYPE AMMONITES— VI

DCCXd

Fig. f

tig. an

Fig. 2

SPH>eKocERAR BKOccHi ; S. BucKMAN, 1893, cit. tpec.

[Sandford Lane Quarry], Sherborne, Dorset; S.B, Coll. 2058

SI. (plane) 39, 72, 85, 48 ; (extended), 63, 45, 53, 30

EMILFJA BROa:HII, J. Sowf.bbv »p„ 1818 5?onnini;iri, hroccMi ; dv^fmyniy^H- . See CDXIV

7927

TYPE AMMONITES— VI

DCCXI

Fig. I

Fio

Ammonites brocchi

Cf. J. Sowerby, M.C., ii, 233 ; ecu, lower fig. ; "Dundry, Somerset ; I.O."

[Lower White Ironshot, hard bed], Cf. S.B.. Q.J.G.S., lii, 676, § i, 5

S. B. Coll. 4742, ex E. Wilson ; SI. 12, 79, 86, 50

S. 25, 46, 72, 38 ; 37, 41, 62, 32'5 ; size 38 ; a colomorph

EMILEIA SUBCADICONICA, Nov. Sonninian, brocchii ; Holotype. See DCCXXX & Cf. DCCII

1927

TYPE AMMONITES— VI

DCCXIIa

Ammonites humphriesianus crassicosta Milbome Wick, Somerset ; Inferior Oolite [sauzei] "

S.B., ex J.B., Coll. 2074; 000 spat of Ostrea ? S. 88, 35, 52, 41 ; 123, 28-5, 45-5, 43 ; size c. 139

L2 double max. c. 180

KUMATOSTEPHANUS PERJUCUNDUS, nov. Sonninian, Labyrinthoceras ; Holotype. See CCCXLV

i

1927

TYPE AMMONITES— VI

DCCXIlB

Fig. I

Fig. 2

Ammonites humphriesianus crassicosta

Milbome Wick ; S.B. Coll. 2074 ; matrix white, with green grains

Cf. Q.J.G.S., xlix, 1893, pp. 502, 503, § XVII, bed 4?

Green grains perhaps derived from bed 5. L2 single

KUMATOSTEPHANUS PERJUCUNDUS, nov. Sonninian, Lahyrinthoceras ; Holotype. See CCCXLV

1927

TYPE AMMONITES-^VI

DCCXIIl

Fig. 1

Fig. 2

PeRISPHINCTES MARTINSI

" Clifton Maybank, Bradford Abbas, Dorset ; I.O."

S.B., ex J.B., Coll. 3298 ; S. 58, 34, 31, 43 ; 94, 27, 20, 49 ; max. c. no

About 4 shallow constrict, per whorl ; venter subbigotitean to smooth

BAJOCISPHINCTES BAJOCIENSIS, Siemikadski sp., 1899, 334 Parkinsonian, garantiana. Cf. CXCI

1927

TYPE AMMONITES~VI

DCCXIV

Fig. I

N.S.

Fig. 2 X 038

Perisphinctes parandieri

Headington Quarry, (Magdalen Coll. Pit) ; Corallian, " Bottom Course "

S.B. Coll. 4537, purch. ; SI. 55, 63, 70, N.c. 83

S. 227, 24, c. 23, 52 ; 322, 25, 22 (19-5), 57 ; max. c. 350

Pre-swollen, ventr. ribs subarc. ; during swollen, venter flat, brieiiy

PERISPHINCTES TUMULOSUS, nov. Perisphinctean, martelli ; Holotype. See DCLXIII

J

1927

TYPE AMMONITES— VI

DCCXV

X 034

Perisphinctes pakandieri ; S. Bickmax, 1925, cit. spec.

T.A. V, 63 ; Holton Quarry (Lye Hill), Holton, Oxon ; Corallian

' Holton Beds, c. 12' up " (J. P.) ; S.B. Coll. 4294, per Mr. J. Pringle

S. 242, 20-5, 38 (30-5), 59-5 ; 349, 25-5, 23-5 (21), 59 ; has mouth

Venter flat (swollen stage) Cf. De Lonol, PI. vii, (non viii, Holot.)

DICHOTOMOSPHINCTES HOLTONENSIS, nov. Perisphinctean, antecedens ; Holotype. See DCL

1927

TYPE A MMONITES— VI

DCCXVl

Fig I

Fig. 2

Fig- 3

zrw.r.

PiCTONIA TENUIS

" Wootton Bassett, Wiltshire ; Kimm. Clay ; J. W. Tutcher Coll." •' S. 47, 30, 30, 40; 74, 35, 28-5, 39," (J.W.T.) ; max. 100 +

PICTONIA COSTIGERA, nov. Rasenian, bay let ; Holotype. See DXXXIII

1927

TYPE AMMONITES— VI

DCCXVIlA

Ammonites pseudogigas

West of Coney Hill, Over Winchendon, Bucks ; Portland Stone

Upper Witchett, soft, white chalky ; S.B. Coll. 4564, purch. workmen

S. 91, 35, 42, 40 ; 153, 41, 43, 33 ; max. c. 160 ; SI. 35, — , 26+, 13+

GLOTTOPTYCHINITES AUDAX, nov. Gigantitan, glottodes ; Holotype. See CDIII

A

1927

TYPE AMMONITES— VI

DCCXVIlB

Ammonites psei'dogigas

Over Winchendon ; 4564 ; " from about middle of top bed "

Shallow quarry, showing upper beds of Creamy Limestones

Up. Witchett, 2 feet ; Hardish stone (Osses Ed), 3' 6" ; Sandy marl

GLOTTOPTVCHINITES AUDAX, Nov. Gigantitan, glotlodes ; Holotype. See CDIII

807

A5B8 V.6

PiScASci.

Buckman, Sydney Savory

Yorkshire type ammonites

PLEASE DO NOT REMOVE CARDS OR SLIPS FROM THIS POCKET

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