Nein tea eds bi ee Ahh Et ad he Wea a) Benes WS wie aa, Wye sia daa iar ch + Ai ellt i 4 Y fi Vi iiela as ‘ Pacer aera te ‘ NM ae LOK | \laem iter re n Niele ay ey tat AAA Ha ‘ 44 BAAN BN N44 4 44 4 ia ara) oy PARR AMIN eee pA La ; anda eh aed Re Waeae we SOR LN Ada eee aaa 1 uiitantaes “ 4 ek 4 nae . dest daicacda Bick oeiee LIE A Tat HAW “6 *¥y U ; Ae VA LAH Haw a OE TT a OW RES HICK me) a saad iin i Adem ae ASS SpA E a ne ay ah AER . 4 i pases Mees ete ¢ ar Pee ke het aN Li M. park Wy wih $0) tte Ry “i ) we ThA Wis NE) Val Vale “ ke 4 RE a tiygh siti ' ‘< . ‘ 44 ath 4 « DRC a eer ca RUCK C4 Oe bee eee +e ; eh hee Weare gh hes dat Ate sana tare i Car os ; a bigiachn We satan sly aos *s BES SAIN 44 CSTR NAA a FANN eid aa AA say Vaal +09 ATS B48 AN kd Dae ORC TOR Le ue be yj hen Suen se) y f Pea Quay eal Bae Ad tet Rae oe Lye aM haw a coer y dehy Let) 4 oy eee t RW hes ay : ve 7 { Wh Pe Ao a a} vf « iron! P "A Ce VE Madey 16 41% t , Aste ates enn $142) 18 hay : “ yt Me) Wa eee Laat ahh ceria ate RMP hE) ee " ea Wa Uh QS ¢ i Mi te Ravan Haas RSA (a Tis ashe vera ANU Bt ee AAW SNA aA Vout ve IC ea’ EN rei i f) s ‘ #4 Mek Kec Ney at " h t : yy i Vay iW at Cj Edt eet Lark iy x he | Mew 1% ah} Heal i RAGE { NR LN “bit i i ae Vaya Le Salta! i ‘ J ewe ¥ ty 4 Wit ‘ rf sean ¥ A “y = * i ¥ 4 } eh WA AA ASK CTO DORK ERC UU ci ENA AAR CEG AR Mi AA Me f “i b ast 3 ‘A +4 Dee ewe etry 4 4 lay i AA et ati CN E ' ¢ "a bf i sy Py re NN He, ec en' ‘ Disa aa be FM 343) 80 4 PARES SM rie ’ Uy Sa) Hie ily yi BSBA aA NN diy i 4 wt 4 4 ALY et # Fa f oie ¥ i AY ; ) AAA AEN s ecu aay Pin! Esa Mi Het 9 4 une OR i N mu 4 ey cn) Dippin ee ba 4 ve Mae Wis WAhal h Ve Get 8 ay teh ae go fe¥ 4A Rare Cy a 4 ¥ yin Ware ap we i % ny Sw 1 babe % re : iy uy Out Ke Hit Wy ha: ae wean wheel Wie ea MOOR MOC Baar ANA AS RIK Pt hi he Meh mie en wry ea) C Yds ; As ay PUNO + 4 (hy ( Ate « wore ’ . " MAAN y \ OL aaah sth Are * isi ca Zs _> = ae. Division of Mollusks Sectional Library CF PROCEEDINGS MALACOLOGICAL SOCIETY OF LONDON. VOL. XII. 1916—1917. STEPHEN AUSTIN AND SONS, LTD., PRINTERS, HERTFORD. PROCEEDINGS OF THE MALACOLOGICAL SOCIETY OF LONDON. EDITED BY B. B. WOODWARD, F.L.S., etc. Davisien of Mollusk: Sectional Library Under the direction of the Publication Committee? VOLUME XII. 1916—1917. AUTHORS ALONE ARE RESPONSIBLE FOR THE STATEMENTS IN ‘THEIR RESPECTIVE PAPERS. LONDON : 2 wrk, DULAU & CO., Lr., 37 Sono Sauarsz, W. 1917. { e 69.0 33 5 } es wy DATES OF: PUBRICATION,. VOL. 3enr March 20th, 1916. November 28th, 1916. May 8th, 1917. August 22nd, 1917. November 10th, 1917. Vol. XII. Part I. Price 7s. 6d. net. _ MARCH 20th, 1916. PROCEEDINGS OF THE MALACOLOGICAL SOCIETY OF LONDON. Edited under the direction of the Publication Committee. AUTHORS ALONE ARE RESPONSIBLE FOR THE STATEMENTS IN THEIR RESPECTIVE PAPERS. CO AN TE SEES. FRONTISPIECE TO VOL. XI. PAPERS continued :— PAGE FRONTISPIECE TO VOL. XII. On South African species of Sepiide. By E. A. Smiru, ; PROCEEDINGS :— PAGE 1.8.0. iste He ai 20° P eet Some new and old Molluscan Ordinary Meetings : Generic Names. By Tom November 12th, 1915 ......... 1 IREDALI .) caddie mer tase, 27 December 10th, TONG csc. 2 Note on the Oligocene of January 14th, LOT Dees eoansie. 2 Tampa, Florida, Panama, ; f and the Antillian Region. Special Meeting : By Ds Wo Aur oes 38 December LOG 19S iss soe 1 Remarks on Dr. Dall’s paper. By R. BULLEN NEWTON, PAPERS :— BEG) Ss fenton: eae eee 40 On Eugyrina gigantea in British Two new species of Angasella. Waters. By the Rey. Dr. By Galk: AGupE his: AGE. (COOKE WE Zig Sais vecs ses 3 (DTS) Menace ner snecce eae ee 41 New British locality for Helix Bibliographical Notes. I. On pisana. By the Rev. Dr. a set of the plates prepared A. H. COOKE, F.Z.S.....5.... 4 for Hutchins’ History of ‘ Dorset, 2nded. II. On the On the Operculum of Bursa. dates of publication of L. By the Rev. Dr. SH. Reeve’s Initiamenta Concho- Cook®, F.Z.S. (Figs.) Sisiareles 5 logica. By A. REYNELL ... 43 On some Pelecypoda from the Note on Glyphioceras vesiculi- Philippines. By E. A. ferum. By G. C. Crick, Smit, 1.8.0. (PlateI.)... 12~ EEG AG s (Hig se hee anon a Ac. 47 LONDON: DULAU & CO., LTD., 37 SoHo SQuaRE, W. For information concerning the MALACOLOGICAL SOCIETY OF LONDON See page iv of this wrapper. PROCEEDINGS OF THE MALACOLOGICAL SOCIETY OF LONDON. ORDINARY MEETING. Fray, 121m Novemper, 1915. The Rey. A. H. Cookr, Sc.D., F.Z.S., President, in the Chair. Professor A. E. Boycott, F.R.S., was elected a member of the Society. The following communications were read :— 1. ‘‘ The occurrence of Hugyrina gigantea (Lam.) in British Waters.” By the Rev. Dr. A. H. Cooke, F.Z.8. 2. ‘On a collection of Pelecypoda from the Philippine Islands.” By E. A. Smith, 1.8.0. 3. ‘*On some new and old Molluscan Generic Names.”? By Tom Iredale. Mr. A. S. Kennard, F.G.S., exhibited a bound volume containing plates issued by the Society for Promoting Christian Knowledge, comprising several plates of Mollusca originally contained in Broderip’s article on Mollusca in the Penny Encyclopedia. The President exhibited a number of living Helicide which were actively crawling about. They had been received from Major Freeman, who had collected them in a condition of estivation in the Gallipoli Peninsula during the recent military operations. SPECIAL MEETING. Fripay, 10ta Drcremper, 1915. The Rev. A. H. Cooke, Se.D., F.Z.S., President, in the Chair. The meeting was convened by the Council for the purpose of submitting a proposal to omit from Rule XVI the words ‘‘at 8 p.m.”’ in order to enable the Council to alter the time of meeting so as to make it more convenient for country members to attend. The President formally proposed a resolution to that effect, which was seconded by Mr. R. Bullen Newton, F.G.S., and carried unanimously. VOL. XII.—MARCH, 1916. 1 2, PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. ORDINARY MEETING. Fripay, 10ra Drcemper, 1915. The Rey. A. H. CooKE, Sc.D., F.Z.S., President, in the Chair. The following communications were read :— 1. ‘‘ Note on the Oligocene of Tampa, Florida, the Panama Canal Zone, and the Antillean Region.” By W. H. Dall, Se.D., LL.D. 2. *“‘ Remarks on Dr. Dall’s paper.”? By R. B. Newton, F.G.S. 3. “Description of two new species of Angasella.” By G. K. Gude, F.Z.S. t. “A new British locality for Helix (Zuparypha) pisana, Mill.” By the Rey. Dr. A. H. Cooke, F.Z.S. ORDINARY MEETING. Frivay, l4ra January, 1916. The Rev. A. H. CookE, Sc.D., F.Z.S., President, in the Chair. The following communications were read :— 1. “The Operculum of the genus Bursa (Ranella).” By the tev. Dr. A. H. Cooke, F.Z.S. 2. “On the Shells of the South African species of Sepiide.” By E. A. Smith, I.S.0. 3. ‘On a volume of plates prepared by Rackett for the second edition of Pulteney’s Dorsetshire Shells in Hutchins’ Hi istory of Dorset.”’ By Alexander Reynell. 4. ‘On the dates of publication of Lovell Reeve’s Elements of Conchology.” By Alexander Reynell. 5. ‘* Note on the Carboniferous Goniatite Glyphioceras vesiculiferum, de Koninck, sp.” By G. C. Crick, F.G.S., F.Z.S. THE OCCURRENCE OF EHUGYRINA GIGANTEA (LAM.) IN BRITISH WATERS. By the Rev. A. H. Cooxer, Sc.D., F.Z.S. Read 12th November, 1915. By the kindness of a friend I have come into possession of a specimen of Lugyrina (formerly known as Fanella) gigantea, Lam., from British ~ waters. ‘he specimen, which was alive when taken, measures exactly 5 inches in length, and still retains the operculum. It was trawled (there were several specimens in all) in the deep trough (50 to 100 fathoms) off the Saltees lightship, between Carnsore Point and St. David’s Head, in company with Cassidaria rugosa, L. Unless I am mistaken, the discovery of this species constitutes an important addition to the British marine molluscan fauna. Five specimens were exhibited before the Conchological Society in May, 1915, having been dredged alive off the south-west coast of Ireland in deep water, also with C. rugosa. Butno precise statement is published ' as to the locality, which may or may not have been within the British marine area. In any case, the present specimen comes from waters which are essentially British, and the locality is by far the most northern hitherto recorded. The species is common in the Mediterranean, and it is probably an accident that all Weinkauff’s localities (ii, 71) are west of Tarentum. Kobelt (Iconogr. ii, 1901, pp. 11-138) records it from the Atlantic only up to the mouth of the Tagus. The Z)-availleur had many years before dredged it in the Bay of Biscay (Jeffreys, Ann. Mag. Nat. Hist., ser. v, vol. vi, 1880, p. 318). Dautzenberg records? it from the voyage of the Hirondelle (1886), from various localities in the Bay of Biscay, from lat. 43° 12’ to 45° 48’ N. and long. 5° 58’ to 11° 52’ W., at depths varying from 160 to 510 metres, in fine sand, coarse gravel, mud, and rock. He also adds that it was met with in the Gulf of Gascony by the Zravailleur and the Porcupine, and that it is frequently brought up by the fishing-boats from off Arcachon. Finally, A. Reynell, recording the results of the cruise of the S.8. Hualey to the northern side of the Bay of Biscay in August, 1906, mentions® Ranella gigantea as dredged in 109 fathoms (four living specimens—two male, two female) from lat. 47° 48 N., long. 7° 46’ W., adding ‘‘the most northerly habitat of this species so far recorded ’’. It appears doubtful whether Locard’s view will hold good, that the Atlantic shells differ sufficiently from the Mediterranean to justify the constitution of two varieties, atlantica and mediterranea. The form atlantica is said to occur in the post-Pliocene of Italy. In accordance with Dall’s classification’ of the Ranellide and Tritonide, the Ranella gigantea of Lamarck is now separated from the former group, and is at present the sole occupant in the British Museum Collection of the genus Hugyrina of Dall. 1 Journ. of Conch., xiv, 1915, p. 366. 2 Mém. Soe. Zool. France, iv, 1891, p. 607. > Journ. Mar. Biol. Assoc., viii, 1909, p. 378. * Smithsonian Coll., xlvii, 1904, pp. 114-44. A NEW BRITISH LOCALITY FOR HELIX (EUPARYPHA) PISANA, MULL. By the Rev. A. H. Cooxs; Se.D., F.Z.8: Read 10th December, 1915. Dorine a visit to Porthcawl (Glamorgan) in August of the present year, I was struck by the occurrence of Helix pisana, Mill., on the sand-hills to the east of the town. Specimens were present in hundreds, clinging, as usual, in masses to the stalks of the herbage. It seems obvious that the species must have been introduced by the agency of man, and probably within the last few years. Although the ‘burrows’ at Porthcawl extend for a distance of perhaps two miles along the coast, and offer what seems a suitable habitat through- out, the species only occurs at present, so far as I was able to ascertain, for the few hundred yards immediately adjacent to the town, just where the bathing tents are pitched. It seems clear that the introducer put his specimens down on the first suitable ground he came to, where they at once increased and multiplied, but they have not yet had time to extend their area of occupation over more than a small section of the sand-hills. It is quite probable that the species was introduced from Tenby, which is hardly more than four hours journey from Porthcawl by train. Not all attempts to colonize Helix pisana in Glamorgan have been so successful. Jeffreys made two attempts, at an interval of years, to colonize it on the sand-hills near Swansea, but the experiment failed. According to J. W. Taylor,? ‘‘Mr. H. Rowland Wakefield now entirely omits it from his list of Swansea shells, as he has regularly and persistently searched the district for some years past, in conjunction with the local Field Club, without finding a trace of a single shell, though recently he has picked up a few dead specimens at Singleton.” Perhaps one of these local Field Clubs may be able to furnish some definite information as to when and how the Porthcawl colony was started, which seems to have a more brilliant future before it than that at Swansea. 1 Brit. Conch., i, 1862, p. 208. 2 Monograph of the Land and Freshwater Mollusca of the British Isles, i, 1912, p. 394. THE OPERCULUM OF THE GENUS BURSA (RANELLA). By the Rev. A. H. Cooxe, Sc.D., F.Z.S. Read 14th January, 1916. W. H. Datt, in his well-known and admirable paper,! ‘‘ An Historical - and Systematic Review of the Frog-Shells and Tritons,” draws up a classification, which results in the following grouping :— Genus Bursa. A. Sub-genus Bursa. Operculum with lateral nucleus: (a) Sect. Bursa (spinosa, Lam.). (6) Sect. Marsupina (spadicea, Mtf., or crassa, Dillw.). (c) Sect. Chasmotheca ( foliata, Brod.). Operculum with apical nucleus : (d) Sect. Ranella (bufonia, Gmel.). (e) Sect. Lampadopsis (rhodostoma, Beck). (f) Sect. Colubrellina (conditus, Gmel.). B. Sub-genus Aspa. Sect. Aspa (marginata, Gmel.). C. Sub-genus Bufonaria. (a) Sect. Crossata (ventricosa, Brod.). (6) Sect. Bufonaria (serobilator [ sic], L.). (e) Sect. Craspedotriton (convolutus, Brod.). It will be noticed that the characteristics of the operculum, given in the above classification, affect only one of the three sub-genera (Bursa), while of the operculum of the two remaining sub-genera (Aspa, Bufonaria) nothing is stated. Dall further remarks: ‘‘ According to Adams the Ranella have the operculum ovate, with an apical or subapical nucleus, while Gray speaks of it as half-ovate with a central, lateral, or internal nucleus ; probably it varies in the different groups as in the Tritons ; in anella Joliata it is figured as concentric, with the nucleus mid-lateral. One cannot safely generalize on the character until the operculum of more species 1s known.”’ In view of this last remark I venture to put on record the facts, so far as they are known to me, of a considerable number of species of the genus Bursa. If students to whom are known the opercula of other species not in the list will gradually add to the number, a more or less complete body of evidence will in the end be accumulated. No final classification of a group can be regarded as settled until full information of this kind is in our possession. It must be premised that Dall published no list of species contained in each of his several groups or sections, but only a type species in each case. J have therefore worked the list as interpreted by the * Smiths. Coll., xlvii, 1904, pp. 114-44. 6 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Natural History Museum in their show-cases. The only difference between their grouping and Dall’s is the nominal substitution of Tutufa, Jouss., for the sub-genus he calls Bufonaria. Nothing is commoner than for opercula to be misplaced, turned upside down, outside in, and even located in shells they do not belong to. Great caution is needed in order to avoid mistakes. Species poss eperoulum Source of information.! Sub-genus Bursa. Sect. Bursa. Species whoseoperculum is not known. albifasciata, Sowb. M.B. cavitensis, Beck. erumena, Lam. MM. JRE, Jijrensis, Wats. elegans, Beck. Ph.D.,J.R.T., A.H.C. neglecta, Sowb. margaritula, Desh. Ji: Rel yea, nobilis, Rve. nana, Sowb. M.B: rana, L. (=albifasciata, Rve.). McA., A.H.C. spinosa, Lam. M.M., J.C.M., A.C thersites, Redf. JC Me Sect. Marsupina. crassa, Dillw. Sect. Chasmotheca. foliata, Brod. Sect. Ranella. bufonia, Lam. MB. AGeuC: grayana, Dkr. siphonata, Rve. JU. Mi Ae C: rugosa, Sowb. tuberosissima, Rve. ASHEC. venustula, Rve. Sect. Lampadopsis. asperrima, Dkr. M.B. papilla, Wood. cruentata, Sowb. Ph: D:, der, rhodostoma, Desh. Ph. Desa aC; thome, Orb. M.B. Sect. Colubrellina. célata, Brod. MMB, cae e, caudisata, Lam. granularis, Bolt. M.B., M.M. (=condita, Dillw.). var. afinis, Brod. M.M., J.R.T. var. livida, Rve. Ph, ME aie var. ponderosa. PhD: pustulosa, Rve. M.B. semigranosa, Lam. iki. Sub-genus Aspa. Sect. Aspa. marginata, Gmel. M.B., McA., A.H.C. 1 Tn this list, M.B., M.M. mean the British and Manchester Museums, McA. the McAndrew Collection at Cambridge, J.C.M., J.R.T., Ph.D., A.H.C. mean respectively Dr. J. C. Melvill’s, Mr. Tomlin’s, M. Dautzenberg’s, and my own collections. DR. COOKE: OPERCULUM OF THE GENUS BURSA. di Species whose operculum is known. Sub-genus Bufonaria (= Tutufa, Jouss.). Sect. Crossata. californica, Hinds. M.5.; Mea.; A: HEC: Species whose operculum Source of information. Fe ayaa iiaaontil ventricosa, Brod. JARI, Ase Ge Sect. Bufonaria. rubeta, Bolt. M.B. coriacea, Rve. scrobiculator, L. JeGa Ms, dledee cumingrana, Dkr. papillosa, A. Ad. ranelloides, Rve. With regard to the section Craspedotriton, Kesteven has shown ' that the operculum and radula of convolutus, Brod., are those of Trophon, not Bursa; it is probable, therefore, that scalariformis, Brod., and scalarina, A. Ad. (= speciosa, Ang.), will also prove to be Trophons: the section therefore drops out. The details of the known species are as follows :— A. Sub-genus Borsa. (a) Section Bursa. General characteristics: operculum rather thin, more or less transparent, almost triangular, with longer side rounded, nucleus sub-lateral, to the left (¢.e. adjacent to the columella), nearly central, clear of the margin, lines of growth prominent. 1. albifasciata, Sowb. A somewhat broken operculum is attached to the tablet in M.B., nucleus to right, sub-lateral, half-way between centre and lower end. In other words, if the operculum belongs to the shell, which I doubt (the shells are Cuming’s), the species must be removed, probably to section Ranella or Colubrellina, from which, conchologically, it is quite distinct. 2. erumena, Lam. Nucleus well marked, lines of growth flattened. 3. elegans, Beck. As in spinosa, not transparent, colour deep brown. 4. margaritula, Desh. Rather less pointed at top and bottom than the other species, dark brown, lines of growth not very prominent. 5. nana, Sowb. ‘Two opercula are attached to the tablet in M.B. (Cuming’s specimens), one rather long, narrow, nucleus sub-terminal, the other more ovate, light-coloured, nucleus sub-marginal, to right, below the centre. It is clear that both of these cannot be the true opercula, and I am inclined to regard them both with suspicion. 6. rana, L. ‘Thin, transparent, lines of growth very sharply marked, and occasionally rising into broad raised ridges. 7. spinosa, Lam. Not angled, but rounded, against the columella, thicker than in rana, lines of growth not elevated. 8. thersites, Redf. Rather thin, nucleus very near the margin, a little below the centre. 1 Pyoe. Linn. Soc. N.S. Wales, vol. xxvii, 1902, p. 479. Dall, though writing his paper on the Frog Shells in 1904, does not seem to have seen Kesteven’s paper, as he expressly says (p. 13), with reference to scalariformis and convolutus, *‘ their operculum is not known to me.’’ 8 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Sections I/arsupina and Chasmotheca. It seems doubtful whether these sections embody any valid distinction from Bursa, s.str. The operculum of crassa, Dillw., does not appear to be known; Dall states that that of fol/ata is as in rana. (0) Section Panella. General characteristics: nucleus to right, thicker than in Bursa, not well marked, lateral, sub-terminal. 1. bufonia, Lam. Rounded above, narrower below, nucleus very indistinct, close to the right of terminal margin. 2. stphonata, Rve. Rounded above and below, nucleus better marked and rather higher up than in bufonva. tuberosissima, Rve. Almost exactly as in stphonata. (ce) Section Zampadopsis. General characteristics: more or less as in Ranella. 1. asperrima, Dunk. Thin, ovate, transparent horn-colour, nucleus terminal, well marked, slightly to the left, lines of growth well marked. This operculum differs markedly in character from the others in the section. 2. eruentata, Sowb. Thin, rounded above, somewhat angled below, nucleus sub-terminal, to right, fairly well marked. 3. rhodostoma, Desh. ‘‘ Nucleus lateral, submarginal, to the right and sub-terminal, like that of s¢phonata” (Ph.D.). 4. thome, Orb. Thin, ovate, nucleus sub-marginal, to the left, sub-terminal, indistinctly marked. (d) Section Colubrellina. General characteristics : operculum ovate, sometimes semi- unguiculate, thickish, narrower below than above, nucleus rather obscure, sub-terminal, or sub-lateral to the right. 1. granularis, Bolt., with vars. afinis, Brod., livida, Rve., ponderosa, Rve. The nucleus varies slightly in position ; in two typical granu- laris (= granifera, Lam.) from M.M. the nucleus is sub-terminal, in a divida from M.M. and an affnis from J.R.T. it is obscurely sub-marginal, to the right, and sub-terminal. Ph.D. remarks to me: ‘‘opere. a nucléus latéral, marginal, situé, soit au dessous du milieu, soit méme presque a l’extremité.” 2. celata, Brod. Shape almost semi-unguiculate, nucleus well marked, sub-terminal, but well away from the margin, lines of growth well marked, rising into ridges in old specimens. 3. pustulosa,| Rve. Shape semi-unguiculate, nucleus almost terminal, closely resembling that of celata. 4. semigranosa, Lam. Many consider this species another variety of granularis. Operculum thin, nucleus obscure, sub-marginal, to right, sub-terminal, as in granularis. ' This species, from West Africa, St. Helena, and Ascension, must surely be regarded as distinct from celata, Brod., a Panama shell which does not occur in the West Indies. DR. COOKE: OPERCULUM OF THE GENUS BURSA. 9 B. Sub-genus Aspa. Section A spa. marginata, Gmel. (the only species). Operculum thin, semi- transparent, lines of growth clearly marked. Shape as in Bursa, but not so triangular, nucleus similarly situated, slightly more removed from the left margin. C. Sub-genus Bufonaria. (a) Section Crossata. General characteristics: operculum ovate, rounded at both ends, thick, dark horn-colour, lines of growth obscure, a nucleus indicated but not existing, lateral, sub-terminal, to right. californica, Hinds. Opercnlum as in the section. In a remark- ably fine and clear specimen from McA. there is almost a visible nucleus on the margin low down on the right. 2. ventricosa, Brod. Operculum a little wider than in californica, but in other respects generally corresponding. (6) Section Bufonaria (= Tutufa, Jouss.). 1. rubeta, Bolt. (=lampas, auctt.). Operculum sub-ovate, not very thick, rounded at top, angled below, nucleus distinct, sub-lateral, to right, well away from margin, below the centre, lines of growth well marked, but not raised in ridges. 2. scrobiculator, L. Operculum sub-ovate, rather thin, semi- transparent, rounded above and below, nucleus distinct, sub-lateral, to right, well away from margin, below centre, lines of growth well marked, but not raised in ridges. On a general survey of the evidence afforded by the operculum, the following points seem to stand out :— 1. There is a large group of Bursa (Bursa, s.str. + Chasmotheca + ? Marsupina) with a more or less triangular operculum, nucleus well marked, in the centre of the left sub-margin. 2. Closely allied to this group stands the sub-genus Aspa, conchologically different, but with an operculum of similar general construction. 3. Another large group (Ranel/a + Lampadopsis 4 Colubrellina) possesses an ovate operculum, with nucleus to the right or near the extremity, generally less well marked, sub-marginal or sub-terminal. Closely allied to this group, and possibly not separable from it, are the species contained in section Bufonaria. 4. Further removed comes a group (Crossata) geographically separate from the Bufonaria section, and with an operculum not essentially dissimilar to that of certain species of Zriton (Lotorium). As Dall has remarked, ‘the Ranellas shade very gradually into the forms formerly known as Triton, judged by most of their characters,” and it is interesting to observe how, on the one hand, Gyrineum and Eugyrina carry the “ Ranella” shape of shell, minus the anal sulcus, into the ‘‘ Tritons”’, while the shell shape of certain 10 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. low-spired forms of Zotortwm is carried into the Crossata group of “* Ranella’’. The evidence, then, of the operculum, plus certain other con- siderations which have appeared in this paper, would lead one to throw out the suggestion that perhaps Dall’s classification might with advantage be modified in the following way :— A. Sub-genus Borsa, containing in a single section Bursa, s.str., Chasmotheca, and probably Marsupina. Fic. 1.—Median teeth of :—1. Bursa granularis, Bolt., Umkomaas, Natal. 2. Triton (Lotorium) australis, Lam., Port ‘Jackson. 38. Crossata ventricosa, Brod., Orange Harbour, Tierra del Fuego. 4. (Triton) leucostoma, Lam., Port Shepstone. 5. Hugyrina gigantea, Lam., Algiers. 6. Crossata californica, Hinds, San Pedro, Cal. All from Professor Gwatkin’s collection. B. Sub-genus Aspa. C. A sub-genus (Ranerra would be a convenient title) including all the sections whose operculum is sub-marginal, generally but not always to the right, or sub-terminal, viz. Ranella, Lampadopsts, Colubrellina, and Bufonaria. D. A sub-genus (call it Crossata if you like) including the two species californica and ventricosa, the form of whose shell and shape of whose operculum approximate towards the ‘‘ Tritons”’. DR. COOKE: OPERCULUM OF THE GENUS BURSA. El The evidence of the radula, as kindly given to me by Professor H. M. Gwatkin, may be stated thus :— An examination of twenty-six species and varieties shows three types of radula. 1. A Bursa type, which includes all the typical Burse, viz. bufonia, calata, cruentata, crumena, granularis and varieties, pustulosa, rana, rhodostoma, semigranosa, siphonata, spinosa, thome. Under this type also, but somewhat distinct from it, come (a) marginata, with radula of so delicate proportions that it stands somewhat apart from the others, and (d) rudeta, of the typical form, but much stronger and stouter. 2. A Triton (Lotoriwm) type (i.e. a median tooth with strong central denticle and several small side denticles) including perca, pusilla, tuberculata, vexillum, and argus, but not gegantea or leucostoma., (N.B. These radule of the ‘‘ Triton” type are by no means typical eeTiripons ’?,) 8. A type unlike both Bursa and ‘‘ Triton”? proper, and including californica, ventricosa, gigantea, and leucostoma, ‘he median exhibits one great central denticle, and is almost bare of side denticles in californica and gigantea: ventricosa combines the big central denticle with the lateral prolongations of a Bursa (Fig. 1). I have to express my thanks to Mr. R. Standen, of the Manchester Museum, to the authorities of the Museum of Zoology at Cambridge, to Dr. J. C. Melvill, and Mr. J. R. Le B. Tomlin for the kind loan of specimens, now exhibited, and also to M. Ph. Dautzenberg for valuable information. ON A COLLECTION OF PELECYPODA FROM THE PHILIPPINE ISLANDS. By Enear A. Suirn, 1.8.0. Read 12th November, 1915. PLATE I. Trts small collection, submitted to me for determination, is not of very special interest beyond the fact that it comprises a number of species not previously recorded from the Philippine Islands, with seven which appear to be undescribed. The specimens were all collected at Port Galera, a small bay almost completely landlocked, on the north coast of Mindoro, opposite the town of Batangas, on the island of Luzon. Of the fifty-nine species enumerated rather more than half have already been recorded from the Philippines, and those which appear to be new to the fauna are marked with an asterisk. The identifica- tion of the specimens! has been much facilitated by the catalogue of the Pelecypoda of these islands published by Dr. J. G. Hidalgo in the Mem. R. Acad. Ciencias Madrid, vol. xxi, 1903, pp. 1-v, 1-400, and in the Revista R. Acad. Ciencias Madrid, vol. ii, 1905, pp. 246-312, and vol. iii, 1905, pp. 9-43. A. LIST OF THE SPECIES. Family Sorenrp2. 1*, Solen sloanit, Gray (?). Two young valves. Family Corsunipm. 2. COorbula crassa, Hinds. 3. C. taitensis, Lamarck. Family Papa. 4.* Paphia macrodon, Deshayes. Family ANATINIDE. 5. Myodora oblonga, Reeve. Family PsamMoprip%. 6. Psammobia squamosa, Lamarck. 7. P. layardi, Deshayes. 8.* P. philippinensis, n.sp. Family Teviiyipe. 9. Tellina (Homala) inflata, Chemnitz. 10. 7. (Arcopagia) pinguis, Hanley. 1 A set of the specimens enumerated has been presented by Professor L. E. Griffin to the British Museum (Nat. Hist.), where the types of the seven new species are also preserved. SMITH :. PELECYPODA FROM THE PHILIPPINES. 13 11. Z. (A.) carnicolor, Hanley. 12. TZ. (A.) pretiosa, Deshayes. 13.* 7. (Fabulina) valtonis, Hanley. 14. 7. (2) rhomboides, Quoy & Gaimard. 15.* 7. (Zellinella) sp. One valve only, allied to sudtruncata, Hanley. 16. Z. (Tellinides) ovalis, Sowerby. Family Perricorip. 17.* Petricola digitale, n.sp. Family VuneripZ. 18. Dosinia histrio, Gmelin. 19.* D. subalata, n.sp. 20. Callista eryeina, Linneeus, var. 21. C. roseotincta, Smith. 22. Pitaria hebrea, Lamarck. 23. Circe scripta, Linneus. 24.* C. lrata, Romer. 25. C. baranda, Hidalgo. 26. Lnoconcha picta, Lamarck. 27. L. philippinarum, Hanley. 28.* Antigona (Ventricola) mindoroensis, n.sp. 29. A. (Crrcomphalus) foliacea, Philippi. 30. Venus (Chione) recognita, Smith. 31. Tapes quadriradiata, Deshayes. Family Carpup2. 32. Cardium (Levicardium) biradiatum, Bruguieére. 33." C.(Trachycardium) nebulosum, Reeve, juv. 34.* Hemicardium (Fragum) fornicatum, Sowerby. 35. H. (F.) hemicardium, Linneeus. 36. H. (Lunulicardia) subretusum, Sowerby. Family Lucryipx. 37.* Lucina euglypta, n.sp. 38.* ZL. transversa, n.sp. Family Unevrinrp&. 39.* Diplodonta sp. One valve only. Family Erycrnrp2. 40. Galeomma argentea, Deshayes. Family CrassaTeLiip&. 41. Crassatellites lapideus, Reeve. Family Carpiripz. 42. Cardita canaliculata, Reeve. 14 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Family Arcip. 43.* Area (Anomalocardia) clathrata, Reeve. 44.* 4.(A.) sp. One young specimen. 45.* A. (Barbatia) parva, Sowerby. 46. Glycimeris pectunculus, Linn., var. 47.* G. planata, Nevill. 48. G. reevei, Mayer. 49.* G. mindoroensis, n.sp. 50.* Limopsis cancellata, Reeve. Family Myrinipz. 51. Modiola flavida, Dunker. Family Pecrrnipz. 52.* Chlamys eristularis, A. Adams & Reeve. 53.* C. blandus, Reeve. se 5 C. nux, Reeve. 55. C. spectabilis, Reeve, var. 56.* C.sp. One valve. 57.* C. sp. ‘Two young specimens. 58. Peeten inaquivalvis, Sowerby. Family Praconip2. 59. Placuna sp. One young valve. B. NOTES ON SOME OF THE SPECIES. Papura macropon, Deshayes, Proc. Zool. Soc., 1854, p. 339, as Mesodesma; Reeve, Conch. Icon., vol. viii, fig. 238. The locality of this species was not known to Deshayes or Reeve, and Hidalgo has not recorded the species in his list of Philippine Pelecypoda. Caxiisra Roskorrncra, Smith, Rep. Challenger Lamellibr., 1885, p- 186, pl. i, figs. 6-60. When describing this species I suggested that it probably attained larger dimensions than those then given. In a series of specimens in the present collection one example is 20°5 mm. in length, which is only 3mm. larger than the type. I am now inclined to think that it does not become much larger. The general tone of colour is rather like that of ‘‘ Dione festiva”’ as given by Reeve (Conch. Icon., vol. xiv, Dione, pl. i, fig. 2). Usually there are at intervals zones of a darker tint than the ground colour, and in some specimens there are distinct, more or less interrupted rays. In the fresh specimens at hand the interior of the valves is whitish round the margin, but purplish elsewhere, with a pale ray from the umbo downwards, All the specimens have the tips of the umbones rosy pink. Anticona (CrrcompHatus) FoLracEa, Philippi, Abbild., vol. ii, 1846, p.alO7 spl. 2, fie. 1. The specimens in the present collection belong to that form of the species figured by Reeve (Conch. Icon., vol. xiv, figs. 109 and 110) SMITH : PELECYPODA FROM THE PHILIPPINES. 15 as Venus tiara, Dillwyn, and by Sowerby (Thes. Conch., vol. 1, 1853, pl. elviii, figs. 125, 126) also as dzara. This variety differs from the typical form of the species, as figured by Philippi, in having the concentric lamine more prominently foliated posteriorly, a groove down the dorsal slope, a little distance from the margin, cutting through the lamelle and thus forming an upper or marginal series of short Jamelle. ; GLyYcIMERIS PECrUNCULUs (Linn.), var. The single specimen in the present collection is flatter than usual, and the coste are more slender than in normal examples, and consequently the intervening grooves are broader. Another slight distinction is the absence of brown colour on the hinge-plate, a conspicuous feature in G. pectunculus and G. muskatensis, Melvill. The latter attains much larger dimensions than those given by the author of his type. Specimens in the British Museum from Muscat, presented by Dr. Jayakar, are 41 mm. high, 43 long, and 27 in diameter, in fact almost double the size of Mr. Melvill’s shell. GLYCIMERIS REEVEI (Mayer), Viertelj. Naturf. Ges. Ziirich, vol. xi, 1868, p. 23, as Pectunculus. = Pectunculus angulatus, Reeve (non Lamarck), Conch. Icon., vol. i, fig. 30. A number of young shells 16-19 mm. in length appear to be immature examples of this species. At this stage of growth the sculpture is more raised, the radiating threads and concentric stris which cross them producing a granose surface. The radiating threads are in groups of about four or five on the middle of the valves, the groups being marked off by pale striz. At the sides they are not in groups, and between them the grooves exhibit very short bristles. The colour is variable, usually light or dark brown with irregular white blotchings. Guycimeris pLanatus (G. & H. Nevill), Journ. Asiat. Soc. Bengal, vol. xlili, pt. 1, 1874, p. 29, pl. i, figs. 16, 16a, as Pectunculus. This Pecten-like species has hitherto been known only from the Andaman Islands. ‘he colour was described as ‘‘ white, mottled, and variegated with brown.” The specimens from the Philippine Islands are white spotted with red, the spots being only on the radiating ribs, and disposed in irregular concentric rows. ‘The interior is white with a faint purplish stain below the umbones down the middle of the valves. One or two of the costz on each side near the hinge- line are slender, simple, and not grooved down the middle like those on the rest of the shell. The largest specimen is 20°5 mm. in height, 21 long, 10°5in diameter. A specimen from the Andaman Islands in the British Museum is about the same size. C. DESCRIPTIONS OF THE NEW SPECIES. PsaAMMOBIA PHILIPPINENSIS, n.sp. Pl. I, Figs. 16-18. Shell transversely elongate, slightly inequilateral, anterior portion rather the longer, sharply rounded at both ends, somewhat more 16 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. acuminate behind, white with a few remote brown marks on the dorsal margins both in front and behind the umbones; both dorsal margins only slightly oblique, ventral margin little arcuate in the middle, but curving upward at both ends; valves thin, sculptured with fine growth-lines, crossed by fine threads which radiate from the umbones, the thread towards the hinder end being more distinct than those in front; upon the posterior excessively fine striz are observable which curve from the margin towards the other radiating threads ; umbones brown at the tip, inthe form of a minute glossy boss or knob of a different texture to that of the rest of the shell; interior of valves glossy white ; hinge-characters normal ; pallial sinus tongue-like, rounded at the end, not reaching quite half-way across the valves. Length 8°5, height 4°75, diameter 3mm. This species resembles P. candidula, Deshayes, somewhat in form, but it is very differently sculptured. The generic term Gari! of Schumacher is used by some authors as being anterior to Psammobia of Lamarck, but to employ a word with a genitive termination as a genus hardly seems admissible. PETRICOLA DicIraLE, n.sp. Pl. 1, Figs. 7, 8. Shell small, sub-quadrate, rather convex and inequilateral, white, slightly iridescent, thin, sculptured with excessively fine criss-cross raised threads, so that the surface presents a punctate appearance rather like a thimble; here and there at intervals shallow waves of growth are also observable; anterior end obtusely rounded, posterior broader, curvedly sub-truncate, ventral margin straightish, not much curved ; anterior dorsal edge oblique, slightly curved, posterior longer, straighter, less descending; lunular area large, defined by a distinct curved impressed line in each valve, extending from the umbo to the end of the dorsal slope; the surface, unlike the rest of the shell, for the most part exhibits lhttle punctation, but merely the most delicate growth-striz. Umbones raised a little above the hinge- margin, contiguous, smooth, with only delicate growth-strie ; three cardinal teeth in the left valve, the central one thick, A-shaped, the others oblique, one on each side divergent from the umbo; right valve with two divergent slender teeth which fall, when the shell is closed, one on each side of the central tooth of the left valve; adductor scars large, anterior pyriform, posterior a little broader ; pallial sinus large, broad, ascending high and beyond the middle of the valve, rounded at the end; hinge-ligament occupying about half the posterior dorsal margin, yellowish. Length 6, height 5°5, diameter 4mm. This shell has not the appearance of being the young of a larger form, since it is considerably convex, and rather like certain forms of Spherium or Kellia in general aspect. The surface to the naked eye appears smooth, and the punctate or thimble-like appearance of the surface is only visible under a lens. 1 From the Latin garwm, a fish-sauce, made from the fish garus. SMITH : PELECYPODA FROM THE PHILIPPINES. ul The young of P. lapicida (Chemnitz) Gmelin, has somewhat the form of this species, but the sculpture is different, being coarser, and it has no definite lunular area. A single valve from Flinders Passage, North Australia, recorded in my report on the Challenger Lamelli- branchiata, p. 118, belongs to the present species and not to P. lapicida. Dosinra supaxata, n.sp. Pl. I, Figs. 11-13. Shell subcircular, moderately convex, rather thin, white with rosy tips to the umbones, very delicately concentrically striated at first and then rather more distantly towards the base, the threads between the strize smooth upon the central part of the valves and becoming finely lamellar both anteriorly and behind; lunule elongate-cordate, prominent in the middle, fairly striated; escutcheon raised and keeled down the middle, defined by a shallow depression in each valve extending from near the umbones nearly the whole length of the posterior dorsal margin; the valves at this part consequently exhibit a narrow wing-like prominence; interior of valves whitish ; anterior adductor scar narrow, elongate, posterior pyriform; pallial sinus long, tongue-like, extending some way beyond the middle of the valves, blunt at the end; hinge normal. Length 25, height 24, diameter 11 mm. Allied to D. lucinalis, Lamarck, of which D. striatissima, Sowerby, is a synonym. The concentric sculpture of the present species, however, is finer, and it lacks the radiating strive of D. lueinalis. The form of the latter is somewhat different, being shorter in proportion to the height. ‘The pallial sinus is considerably longer in D. subalata. D. celata, Reeve, is even more closely related, and differs only in having stronger lamelle in front and behind, a larger and much deeper dorsal area marked off by asharper cristate keel, and a slightly shorter pallial sinus. Antigona (VENTRICOLA) MINDOoROENSIS, n.sp. Pl. I, Figs. 1-3. Shell sub-globose, very inequilateral, white, with four curved, sub-equidistant, reddish rays, concentrically delicately lamellated, the lamelle being thin, erect, and cross-striated on the lower side ; between the lamelle the surface exhibits fine thread-like lines, four or five in each interval, also excessively minute curved radiating strie ; lunule broadly cordiform, brown, sunken except in the middle, where it is a little raised; marked with fine raised lines of growth; escutcheon deep, defined by a sharp keel in the left valve, upon which the lamelle terminate; the portion of the escutcheon in the right valve is smaller than that of the left and less sharply defined, the lamelle extending further over towards the edge of the valve; umbones yellowish or pale brown at the smooth tips which curve forward over the lunule ; interior of the valves white outside the pallial line, very faintly tinted with a kind of flesh tint within the pallial line, which is shortly angularly sinuated; inner edge of the valves very finely crenulated all round excepting on the hinder dorsal margin, the crenulations on the edge of the lunule being finer than those on the ventral edge; anterior adductor scar ovate, posterior larger, sub-reniform. VOL. XII.—MARCH, 1916. 2 18 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Length 30, height 28, diameter 16 mm. A specimen in the British Museum, said to come from Hong-Kong, is a little larger than the Philippine specimen, being 37 mm. long, 35 high, and 21 in diameter. V. rigida, Dillwyn, of which V. pilula, Reeve, is a synonym, in some respects resembles the present species. It is, however, rounder, more globose, differently coloured, has less erect and less delicate lamelle, and the spotting on the escutcheon, in the left valve only, is peculiar. It isa West Indian shell. Luctna EvGLyeTa, n.sp. Pl. I, Figs. 4-6. Shell irregularly rounded, inequilateral, white, concentrically finely closely lamellated and radially costate between the lamelle, which are finely frilled through crossing the coste ; valves moderately thick, with a depression marking off a wing-like portion below the straight posterior dorsal margin; lunule very small, deep, under the umbones, which are contiguous, but the tips curl away over the lunule; beyond this there is another ill-defined lunular space enclosed by a slight curved depression on the valves; there are no radiating costelle upon the hinder wing-like portion of the valves, or upon the lunular space, and consequently the concentric lamellee are simple and not frilled; interior of the valves white, with the lower margin slightly denticulated; posterior adductor scar pyriform, anterior narrow, long; dentition normal. Length 17, height 16, diameter 9 mm. This species bears some resemblance to LZ. gemma, Reeve, in respect of the wing-like hinder part of the valves. There is a great difference in the surface ornamentation of the two species. JZ. gemma has no radiating coste between the concentric lamelle, which are beautifully denticulate or serrate. It is also a much flatter species than that now described. Luctna TRANSVERSA, n.sp. Pl. I, Figs. 9, 10. Shell oblong, transverse, almost equilateral, white, concentrically finely ridged, finely yet roughly radiately striated between the concentric ridges or lire; valves rounded in front with a cristate keel behind, marking off an elongate, lanceolate escutcheon exhibiting only fine growth-lines; lunule sunken, elongate, marked with fine lines of growth ; umbones smooth at the tips, contiguous; the posterior keel, which is crested with the concentric lamelle, forms a point at the hinder end of the valves; interior white; posterior adductor scar rounded except above, where it is as if truncate; anterior scar short, irregularly ovate. Length 10°75, height 8, diameter 4°75 mm. Allied to Z. fabula, Reeve, but more closely concentrically ridged, and not so strongly or regularly striated between the ridges. There are also differences in form. GuLycIMeRIs MINDOROENSIS, n.sp. Pl. I, Figs. 14, 15. Shell small, irregularly rounded, slightly inequilateral, whitish, with small scattered pinkish spots or dots upon the radiating cost ; Proc.Mavrac.Soc. d.Green del. lith.et imp. PELECYPODA FROM THE PHILIPPINE 1S. SMITH: PELECYPODA FROM THE PHILIPPINES. 19 these are about twenty-four in number, rounded, sub-equal, excepting a few on each side near the umbones which are more slender. ‘The sulci between the ribs and the costz also are crossed by very fine crowded lamelle; the valves are rather thick, having the shorter side (that towards which the umbones incline somewhat) rather straight, the opposite end and the ventral margin being broadly curved. The interior is white, stained on the anterior side with - reddish brown; lower and lateral margins coarsely dentate ; hinge- teeth, about twelve, arranged in a curved line; anterior adductor scar roundish, posterior elongate-oval. Length 9, height 9, diameter 5-5 mm. Somewhat resembling G. hoyle’, Melvill & Standen, from Torres Straits, but with the umbones more curved over anteriorly, higher in proportion to the length, fewer and coarser hinge-teeth, the ribs are devoid of tubercles, and the concentric fine raised strive or lamelle are continuous on and between the coste. Although it is impossible to say that the shell described is adult, it does not look as if it would attain much larger dimensions. For so small a shell the hinge-plate is very thick, and the teeth are strong. The lines of growth are very crowded, and, being continuous over and between the ribs, they have a wavy appearance. EXPLANATION OF PLATE I. Figs. 1-3. Antigona (Ventricola) mindoroensis, n.sp. » 46. Lucina euglypta, n.sp. ,», 1,8. Petricola digitale, n.sp. »5, 9,10. Lucina transversa, n.sp. ,, 11-13. Dosinia subalata, n.sp. », 14,15. Glycimeris mindoroensis, n.sp. ,, 16-18. Psanmobia philippinensis, n.sp. ON THE SHELLS OF THE SOUTH AFRICAN SPECIES OF THE SEPIIDA. By Enear A. Smirg, 1.8.0. Read 14th January, 1916. PLATE II. Some time ago a collection of Mollusca from South Africa was sent me for determination by Mr. H. C. Burnup, of Maritzburg, Natal. It contained a number of ‘‘ bones’ or shells?! of cuttlefishes, the identification of which necessitated the study of all the South African forms.? Since the collection contained some new species which had to be described, it seemed it might be useful to offer at the same time some notes on all the South African forms. Although I am unable to give any account of the animals of the new species, the shells appear to possess certain constant reliable characters by which the species can be recognized. SEPIA VERMICULATA, Quoy & Gaimard. Sepia vermiculata, Quoy & Gaimard, Voy. Astrolabe, Zool., vol. ii, 18382, p. 64, pl.i, figs. 1-5; d’Orbigny & Férussac, Hist. Nat. Céphal. acétab., 1848, p. 279, pl. iii dvs, figs. 1-46, copied from Q. &G. Hab.—Cape of Good Hope (Q. & G.). M. d’Orbigny suggested that this species and S. hierredda of Rang are synonymous, and, judging from the shells only, I am inclined to think he was correct. Certain differences which have been described in the coloration of the animals of the two forms may not, I think, be of much importance. Sepia HIERREDDA, Rang. Sepia hierredda, Rang, Mag. de Zool., Classe V, Mollusques, 1837, p. 75, pl.c; d’Orbigny & Férussac, Hist. Nat. Céphal. acétab., 1848, p. 268, pls. xiii, xvill. Hab.—Port Elizabeth, Cape Colony, Tongaat Beach, Natal, Lagos, Guinea Coast, Sierra Leone (all Brit. Mus.); Goree, Cape of Good Hope (d’Orb. & Fér.); Goree (Rang). A large shell of this so-called species from Lagos, presented to the British Museum by Sir Alfred Moloney, is about 230 mm. in length. This form is narrow, elongate, rather pointed at the anterior end, considerably thick about the middle of the ventral side. The chitinous margin spreads over the dorsal surface at the hinder end. The back is pale down the middle, becoming very pale reddish at the sides. ‘here is scarcely any noticeable central ridge and the surface is finely granulated, the granules sometimes ranged in series following the lines of growth down the middle of the back. 1 Sepiostaire, sepium, or sepion. 2 Here limited to the coasts of Natal and Cape Colony. SMITH : SHELLS OF SOUTH AFRICAN SEPIIDZ. OI Sepia zanziparica, Pfeffer. Sepia zanzibarica, Pfeffer, Abhandl. Naturwiss. Verein Hamburg, vol. viii, Heft ii, No. 6, 1884, p. 9, figs. 11, lla. Hab.— Tongaat, Natal (H. C. Burnup) ; Zanzibar (G. Pfeffer). A single shell from Tongaat agrees in every respect with the - description and figure, but is much lar ger, having a length of 255 mm. The dorsal surface, not referred to by Dr. Pfetfer, is coarsely wrinkled towards the posterior end, the wrinkling becoming gradually more feeble anteriorly. This species is remarkable for the very broad, deep central depression on the ventral side, and for the great development of the deep inner cone, which is lined with a thick calcareous deposit and has a chitinous outer covering. The yellowish chitinous margin of the shell is well developed all round, and united above, but free from the end of the inner cone, The spine is short and strong, and arises from a much thickened shelly margin. Colour white, excepting an obscure reddish ray on each side, diverging from the posterior end. Sepra acuminata, n.sp. Pl. II, Figs. 3, 4. Shell elongate elliptical, conspicuously tapering and becoming pointed anteriorly ; striated area flattish or a little concave, occupying more than half the total length, with a shallow central groove and a few faint strie radiating from the hinder end, causing the curved transverse strie to be a little wavy. Chitinous margin broad posteriorly, thinly lined with callus, which is a little thickened beneath the spine, the thickening being ridged or striated. Limbs of the inner cone thickened, united behind, forming a rounded angle, horn-colour. Spine moderate, rounded, not keeled, generally directed slightly dorsally. Dorsal surface reddish, excepting the corneous margin, having a faint central ridge, finely wrinkled and granulated. Length 103, greatest width 36, greatest thickness 9 mm. Hab.—Port Elizabeth (J. H. Ponsonby and H. A. Spencer); Tongaat Beach, Natal (H. C. Burnup). A small specimen, 35mm. in length, described by Dr. G. Pfeffer as S. venusta’ (= venustoides, Hoyle) from Zanzibar apparently closely resembles the young of this species. A specimen from Tongaat, 46 mm. in length (pl. ii, fig. 4), differs from other examples of the same size in having the chitinous margin more widely developed posteriorly, and the striated area is longer and divided into three distinct areas, one on each side, and a central one, twice as broad as the laterals. The latter are concave and separated from the central area by a keel or ridge. The striz on both lateral and central areas are elegantly curved. ' Abhandl. Naturwiss. Verein Hamburg, vol. viii, Heft ii, No. 6, 1884, Beles figs. 15, lda. 22 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Serta PAPILLATA, Quoy & Gaimard. Pl. II, Figs. 1, 2. Sepia papillata, Quoy & Gaimard, Voy. Astrolabe, Zool., vol. ii, 1832, p. 61, atlas, pl. i, figs. 6-14. Shell elongate ovate, in adult specimens sometimes contracted somewhat anteriorly; striated area a little concave, with a median groove or depression which is faintly continued upon the last loculus ; inner cone shallow, rounded at the end, its limbs, of a pale brownish colour, reaching almost half the total length, spreading more or less, and sometimes somewhat pointedly produced posteriorly ; spine very obtuse and short, with an excavation or pit between it and the margin. The dorsal surface has a feeble central rounded ridge, with a faint depression on each side, and is finely wrinkled everywhere, excepting towards the hinder part, where the wrinkling becomes coarser. The colour of the dorsal surface is pale reddish excepting the posterior thin sides, which are whitish. Length of Quoy’s type 76 mm., width 37. Hab.—Port Elizabeth (J. H. Ponsonby and H. A. Spencer) ; Tongaat Beach, Natal (H. C. Burnup); Cape of Good Hope (Quoy & Gaimard). One of the specimens presented to the British Museum by Mr. Spencer is 134 mm. in length and 60 in width. In general structure this species resembles S. mestus, Gray,’ from Australia, but differs in the absence of the keeled spine, in the expansion of the limbs of the inner cone being more narrowly produced posteriorly, and in rather coarser dorsal wrinkling. The almost obsolete spine appears to be a constant feature both in young and old specimens. Quoy & Gaimard do not describe this feature, but it is quite possible they may have regarded it as an abnormality in their specimen, since there is no evidence that they had other examples. However, their figure 12, although somewhat crude, sufficiently shows that their shell had an obtuse spine similar to those in the series I have examined. It should be noted also that the limbs of the inner cones are rather variable. Sometimes, as in the Astrolabe figure, they do not expand much posteriorly. On the contrary, in some specimens they spread considerably, and become rather pointed posteriorly. I have given the above particulars, since the description in the Astrolabe is very superficial and incomplete. SEPIA JoUSSEAUMI, Rochebrune. Sepia jousseaumt, Rochebrune, Bull. Soc. Philom. Paris, sér. vir, Wol. wili,. 1884. 29-2 = S ~ Sctiipeonon yy, 1oause « fh i . . . . . . . . . . Taq WoT oy ee Le ee ee SOO COU uniec € F 9 IT &@ ¢* sdaquayy Surpuodsatioy 0-2 oF ° * ° steqiteyy ArcuiprG —oouvape ut suoydiosqng jenuuy “ Ye. 06 GZ ° Sdaquoyy Sutpuodsoa10) 06 OF ° °° SXequmopy ArvutpIC —1vaiiv ut suoydriosqng jenuuy * 6. LY 8 FI LIL °* sdaqmoyy Sutpuodsaar0y 0 § 607 ° ° *° Sdoqumoeyy AreUTpPIC —suorjdiosqng yvnuuy Sl ee. = 2 “oy = > = awe asey WoIpoouRie OF, eee mq @OT HUNLICNAdXHA UNV HNOONT ay “NOGNOT WO ALHIOOS TVOIDOTOOV IVAN Yes) VOL. XII.—Nov. 1916. 54 ANNUAL GENERAL MEETING. Fripay, 1lra Frsrvary, 1916. The Rev. A. H. CookE, Se.D., F.Z.S., President, in the Chair. The Rev. E. W. Bowell and Mr. A. E. Salisbury were appointed scrutineers, The following report was read :— ‘* Your Council, in presenting their twenty-third Annual Report, have much pleasure in again recording a year of continued progress. ‘¢ The papers printed during the past year have maintained their usual standard of excellence. ‘‘It is with considerable regret your Council have to record the loss by death of a prominent member, Mr. J. J. MacAndrew, F.L.S., while owing to resignation and other causes six more names have been removed from the Society’s rolls. ‘‘During the year two new members have been elected, so that the membership of the Society on December 31st, 1915, stood as follows :— Ordinary members. : ; : : ; 69 Corresponding members . ; : , ; 87 Total : . 156 ‘¢The financial condition of the Society continues in a satisfactory state, considering the adverse influence of the protracted war. We still hold £50 in Metropolitan stock, and the balances on the ordinary special accounts are well maintained. ‘“The usual three parts of the ‘ Proceedings’, Parts 4-6, com- pleting Vol. XI, have been issued during the year. They comprise 164 pages of text, illustrated with 5 plates and 28 text-figures. ‘““The following authors have very kindly assisted in the cost of these illustrations, or have furnished drawings or photographs for reproduction: The Rev. E. W. Bowell, Prof. A. E. Boycott, G. C. Crick, R. B. Newton, J. R. le B. Tomlin, and B. B. Woodward. ‘‘Further, the thanks of the Society are especially due to the Council of the Linnean Society, through whose kindness it has been permitted, since the year 1894, to hold its meetings in Burlington House.” On the motion of Mr. Tom Iredale, seconded by Prof. A. E. Boycott, the above was adopted as the Annual Report of the Society. The following were elected Officers and Council for the year 1916 :— President. —J. R. le B. Tomlin, M.A., F.E.S. Vice-Presidents—The Rev. A. H. Cooke, Sc.D., F.Z.S., A. S. Kennard, F.G.S., R. Bullen Newton, F.G.S., Alexander Reynell. Treasurer.—J. H. Ponsonby Fane, F.Z.S. Secretary.—G. K. Gude, F.Z.S. Editor.—E. A. Smith, 1.8.0. PROCEEDINGS OF THE MALACOLOGICAL SOCIETY, 55 Other Members of Council.—Professor A. E. Boycott, M.D., F.R.S., G. C. Crick, F.G.S., Tom Iredale, Charles Oldham, E. R. Sykes, F.L.S., B. B. Woodward, F.L.S. On the motion of the Rev. E. W. Bowell, seconded by Prof. A. E. Boycott, a vote of thanks was passed to the retiring Officers and members of the Council, and to the Auditors and Scrutineers. The Rev. Dr. A. H. Cooke proposed a vote of sympathy to Mr. E. A. Smith and his family in his serious illness, which was passed unanimously, and the Secretary was requested to write to Mrs. Smith to this effect. ORDINARY MEETING. Fripay, 1lra Ferepruary, 1916. J. R. LE B. TOMLIN, M.A., F.E.S., President, in the Chair. The following specimens were exhibited :— By the President: Pleurotomaria salmiana, Rolle, from Tosa, Japan; some rare species of Marginella, including fulminata, Kien., guillaini, Petit, melvilli, T. & S., hiraser, Bauvay, retusa, Loc., ostert, Jouss., deta, Jouss., pulvis, Jouss., and micans, Petit; a number of forms of Trochide and Arculariida from the Mediterranean, showing that, although there has been undoubtedly too much ‘ splitting’, the number of species is larger than is generally supposed. By the Rev. A. H. Cooke: A further series of Purpura lapillus, L., from various parts of the British Isles, illustrating variation ; a number of drawings of the radule of the Purpura group (Purpura, Acanthina, Cuma, Vextlla, Pinaxia, Concholepas, Rapana, Choras, Topas, Sistrum), from specimens in Professor Gwatkin’s collection. By Mr. G. K. Gude: A series of the genus Caithaiea, including many extremely rare species, such as subtilistriata, Andr., holdereri, Andr., ohlmert, Andr., cucunorica, Mlldff., futterert, Andr., hermannt, Gude, rettert, Rosen, funki, Ancey, sturanyana, Kob., all from Central Asia. By Mr. Tom Iredale: A beautiful collection of Tasmanian Chitons, forwarded by Mr. W. L. May, of Sandford, Tasmania, that has facilitated the detection of several errors, both of omission and commission, that had previously escaped notice. By Mr. R. Bullen Newton: Normal and sinistral forms of Marginella bifido-plicata, Kdwards, from the Upper Eocene, Barton, Hants. By Mr. A Reynell: Manuscript of Henry Lee’s paper on the anatomy of the oyster; manuscript of Gassies’ paper on Bulimus truncatus; conchological illustrations or figures of new and rare genera and species of shells drawn by Henry Denny, 1834. ORDINARY MEETING. Frivay, 10raH Marcu, 1916. J. R. LE B. Tomuin, M.A., F.E.S., President, in the Chair. Mr. G. C. Crick exhibited an unusually large Rhyncholite, or caleareous part of the upper mandible of a Nautilus-like Cephalopod, 56 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. which, although not definitely localized, was with much probability of correctness believed to be from the Inferior Volite of Dorset. The fossil was among the largest recorded examples, being, although imperfect at each end, more than 50mm. long. The following communications were read :— 1. ‘Note on Zriphora smithi, Sowerby, and 7. gracilior, Smith.” By AS Smith, 1.8.0. 2. ‘Note on the occurrence of the Larva of a Cestode Worm in Polita rogersi.”” By Prof. A. Kk. Boycott, M.D., F.R.S. 8. ‘Note on Pholas costulata, Goodall.” By the Right Hon. Lord Walsingham. ORDINARY MEETING. Fripay, 14raH Aprit, 1916. J. R. LE B. Tomuin, M.A., F.E.S., President, in the Chair. Mr. W. James Wintle was elected a member of the Society. Prof. A. E. Boycott exhibited Planorbis from a pond near Radlett, Herts. The specimens of a dark colour were taken in August, 1915; some small pale forms, with strize more marked, were their progeny. The original specimens were provisionally referred to P. levis when compared with P. albus, which occurs plentifully in neighbouring ponds. The following communications were read :— 1. ‘*Note on Holocene Marine Mollusca from the Aran Isles.” By J. R. le B. Tomlin, M.A., F.E.S. 2. ‘* Notes on a small collection of Helicoid Land Shells from Wiak Island, Dutch New Guinea, with descriptions of two new species of Papuina.” By H.C. Fulton. 3. ‘Notes on the family Ampullariide (continued). The genus Lanistes.”” By G. B. Sowerby, F.L.S. 4. “On two editions of Duméril’s Zoologie Analytique.’ By T. Iredale. ORDINARY MEETING. Frinay,, [2c May, so G. The Rey. A. H. Cookn, Se.D., F.Z.S., Vice-President, in the Chair. The following communications were read :— 1. ‘“ Descriptions of new Mollusca.” By G. B. Sowerby, F.L.S. 2. ‘*Solander as a Conchologist.” By Tom Iredale. 3. ‘“Misnamed ‘Tasmanian Chitons.” By Tom Iredale and W. L. May. The Rey. Dr. A. H. Cooke exhibited a series of Purpura succincta, Mart., and the var. textiliosa, Lam., ranging from Caloundra, Queens- land, to Western Australia; also from ‘Tasmania, Norfolk Island, and New Zealand. Many of the specimens were recently received from Dr. Verco, a letter from whom was read. PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 57 Mr. A. Reynell exhibited a bound volume of autograph letters from various paleontologists and conchologists, including S. P. Woodward, F. E. Edwards, the Rev. Thomas Wiltshire, W. E. Smith, Sir Joseph Prestwich, Canon A. M. Norman, George Johnston, N. T. Wetherell, S. V. Wood, Dr. Hugh Falconer, Milne Edwards, K. Charlesworth, J. Beete Jukes, and H. Nyst. : Mr. G. B. Sowerby exhibited a specimen of Argonaula tuberculosa of extraordinary size (10 X 8 inches). ORDINARY MEETING. Fripay, 9ra Junr, 1916. Mr. A. S. KENNARD, F.G.S., Vice-President, in the Chair. Dr. Florentino Felippone was elected a member of the Society. - The following communications were read :— 1. “Note on rato guttula, Sow.” By J. R. le B. Tomlin, M.A., F.E.S. 2. “On an undescribed Ammonoid from the Lower Greensand (Aptian) of Kent.” By G. C. Crick, F.G.S., ete. 3. “(a) Note on Helix seytodes, Pfr.; (b) Mlartensia versus Mertensia.”’ By G. K. Gude, F.Z.S. Prof. A. E. Boycott, F.R.S., exhibited a number of specimens of Bithynia tentaculata from various Hertfordshire localities, the female forms preponderating; also several specimens of Pupilla umbilicata from Cheltenham and Hertford, showing a range in size from 2°5 to 4mm. OBITUARY NOTICE. Ir is with much regret we have to record the death of William Tompson Bednall. He was born at Leicester in August, 1838, and educated at the Philological School, London. His first employment was at the Jermyn Street Museum of Practical Geology, then under the direction of Sir H. B. De La Beche. In 18453 he emigrated to Australia and entered the service of the Register, a prominent newspaper of Adelaide, South Australia. .In 1874 he edited a paper at Port Darwin in the Northern Territory. But after two years in the Tropics he returned to the Register, upon which he was engaged till his retirement in 1908. For several years his health was delicate, and he died on July 25, 1915, in his 77th year, leaving a family of one married daughter and three sons. All his life he was an enthusiastic conchologist. He is associated with two splendid species which he discovered in the Northern Territory, Voluta bednalli and Murex bednalli. Besides these two, of which he was especially proud, the specific bednalli was adopted tor Australian members of the following genera: Acanthochites, Chiton, Drillia, Epidromis, Helix, Pecten, Trigonia, and Unio. For many years he was honorary curator in Conchology to his State Museum. He was one of the founders of the Royal Society of South Australia, to the publications of which he contributed six articles on Australian Mollusca. His best work was an article on the Polyplaco- phora of South Australia in the ‘ Proceedings of the Malacological Society of London’ (vol. ii, 1897, pp. 139-59, pl. xii and figs.). His last conchological paper, also on Polyplacophora, written in association with E. H. V. Matthews, appeared in the same journal (vol. vu, 1906, pp. 91-2, pl. ix). C. Heptey. NOTE. THE OCCURRENCE OF THE LARVA OF A CestopE Worm IN POLITA ROGERSI. (Read 10th March, 1916.)—In January, 1915, aspecimen of P. rogersz, B. B. Woodw., was found near Radlett (Herts) which showed on dissection the presence of larvae of some cestode worm in the lower part of the liver. The cysts, some twenty in number, seem to lie free in the cavities of the liver ; they are about 0'4mm. in diameter, with a pretty tough outer skin. On rupturing this, the scolex is delivered, showing a bilobed appearance, with the head sunk in a pit at one end. There are numerous calcareous bodies. The hooks are, as far as I can see, eighteen or twenty in number and about 0°05mm. long. ‘The other host of the parasite is presumably something which eats the snail ; birds and voles suggest them- selves. The foot and tissues of the snail had the peculiar pinkish appearance which is sometimes seen in P. rogers? (Lancashire Naturalist, vol. vii, 1914, p. 311). The eggs of the tapeworm can evidently pass uninjured through the masticatory apparatus of the snail, which affords further evidence that the radula is a prehensile rather than a grinding apparatus. A. E. Boycort. P.S.—Since writing the above I have found apparently the same parasite in six out of ten specimens of Poltta cellaria (the scharffi form) and in two of twenty-one P. nitidula collected in August at Sopwell Nunnery, near St. Albans. Mr. Bowell, who was with me, recollects that mouse feces were abundant where the snails were. P. rogersi was not found. A large number of Polita have been examined from other localities in South Hertfordshire with negative results. 60 NOTE ON TRIPHORA SMITHI, SOWERBY, AND T. GRACILIOR, SMITH. By the late Enear A. Surru, I.8.0., F.Z.S., ete. Read 10th March, 1916. TripHora suirut was described by Mr. G. B. Sowerby in these ‘‘ Proceedings”? (vol. vi, p. 174) from a single shell preserved in the collection of the late Admiral Keppel. At the time (September, 1904) the locality was unknown, and the unique shell was referred to as ‘larger than any other known species of the genus” excepting T. princeps, described by Mr. Sowerby at the same time, also from an unknown locality. The object of this note is to point out that T. smithi had previously been described by myself as Z. gracilior, that the species when adult is quite as large as 7. prineeps, and also to give its geographical distribution as far as at present known. The description of Z. gracilior was published on November 15th, 1908, in Stanley Gardiner’s Launa and Geography of the Maldive and Laccadive Archipelagoes (vol. ii, p. 614, pl. xxxv, figs. 18, 19). The species was founded on a single shell from the Maldive Islands, which is preserved in the British Museum. It is 5mm. shorter than Mr. Sowerby’s type, also in the national collection, having a length of 28mm. In the year 1907 the Museum acquired a large selection of shells from an extensive collection made at the Andaman Islands by the late Rev. J. L. I’. Warneford, and among the specimens obtained was a fine example of 7! gracilior, which if the top of the spire had not been broken off must have measured almost 60 mm. in length. Mr. Sowerby has given the number of whorls of 7. smithi as thirty- five, but in my examination of the type I can count only twenty-six. Perhaps Mr. Sowerby may have allowed nine extra whorls for the top of the spire which is wanting, but I do not think it would have consisted of so many. He described the whorls as having 2-4 spirals, which is vague and not quite accurate, since each whorl bears three spirals, the uppermost, below a fine sutural thread, being a little more slender than the other two. The latter also are slightly affected by faint longitudinal depressions, giving them an obscurely beaded appearance. ‘I'his is noticeable in the types both of smithi and gracilior, but is hardly apparent in the very large Andaman specimen. ‘Lhe space between the second and third keel is a little broader than that which separates the first and second, and the suture is filo-carinate. The labrum in the adult is a trifle etfuse, and exhibits within three grooves, which correspond to three of the external spirals or carine, namely, the two peripheral ones close together and one above more remote. The columella has a well- defined callus extending from the junction of the outer lip above to the end of the oblique anterior canal, which is not closed. In conclusion, I may add that the figure of 7. smzthi does not give any idea of the true sculpture of the species. That of Z. gracilior in Mr. Stanley Gardiner’s work is fairly accurate. 61 NOTE ON PHOLAS COSTULATA, GOODALL. By the Right Hon. Lord Watstnenam, M.A., LL.D., F.R.S., ete. Read 10th March, 1916. In 1890 I communicated to the Norfolk and Norwich Naturalists’ Society some remarks on a species of Pholas dredged by my father off Hill Head, near Gosport, about 1819, and these were published in the fifth volume of the Society’s Transactions (pt. 1, pp. 79-86, with figures) accompanied by two interesting letters from Dr. J. Goodall (then Provost of Eton College), to whom the specimens had been sent, and who suggested (Joc. cit., p. 80) the name Pholas costulata, since he considered it a distinct species allied to P. candida. In the same communication is included a letter from Mr. Edgar A. Smith, 1.8.0. (then in charge of the Conchological Collections at the British Museum, Natural History), to whom I sent the original specimens, and who expressed the opinion that they represented a depauperated form of P. candida. Pholas costulata, Goodall.—Original woodcut, from the Trans. Norf. and Norwich Nat. Soc., vol. v, pt. 1, 1890, p. 85; taken from Mr. Smith’s drawings. Figs. 1 and 2, two sketches showing sculpture and variation in form (enlarged). Fig. 8, dorsal view (natural size), accessory plate removed. Fig. 4, interior, showing hinge characters, etc. On December 28th last I found on the beach at Hove, Sussex, a small block of chalk, evidently bored by Pholas, and cut from it three specimens, two small and one larger (of which one valve was unfortunately broken). I at once recognized these as similar to the species in my grandmother’s collection. I searched fer several days on the same beach and found many blocks of chalk and shale, con- taining numerous specimens of P. parva and some other shells, but P. candida was not represented, nor could I find any further specimens of P. costulata. 62 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Pholas costulata differs from P. candida in the more convex ventral margin; in the less evenly rounded anterior end, which is more inclined to become angular; in the more attenuated and more widely gaping posterior end; and in the greater thickening of the shell on the dorsal margin by the base of the internal tooth or myophore; as well as in the external ribbing, as pointed out by Dr. Goodall. IT am not greatly concerned with the question whether conchologists will accept the name costulata, Goodall, as representing a species truly distinct from candida, but I have seen no intermediate forms, and should at once recognize any similar specimens. My personal interest in the subject is specially due to the unexpected coincidence that again connects it with my family. It is somewhat remarkable that a grandson, at the age of 72, should practically rediscover a British shell known to his grandmother as a new species in 1820, which has escaped recognition and publication from that time to this, except in the paper above mentioned. P.S.—On the 6th of October, 1916, I spent several hours in searching for more specimens of Pholas costulata. Failing to find it on the beach where I had first met with it, I visited the coast between Black Rock and Rottingdean to the east of Brighton. Beneath the cliffs, at low tide, many acres of broken chalk-beds are exposed, and these are plentifully bored by Pholas. P. parva was in great abundance, solid and detached blocks of chalk containing many examples; in the latter case no living specimens were found. P. candida also occurred, but quite sparingly. I was unable to discover a single specimen of P. costulata, and am inclined to think that those found at Hove must have come from some other, submarine bed of chalk, rather than from that underlying the cliffs toward Rottingdean. 63 NOTE ON SOME HOLOCENE MARINE SHELLS FROM THE ARAN ISLES, CO. GALWAY. By J. R. rz B. Tomutn, M.A., F.E.S. Read 14th April, 1916. Mr. Kennarp sent me, some little time ago, a sample of blown sand of Holocene age which he had received from Mr. R. A. Phillips, of Cork. ‘The latter writes that he collected it from a low-lying, sandy marsh at Killeany Bay, Inishmore, Aran Isles, Galway, where there was blown sand covered with grass, and the material was actually obtained from a pit excavated by the wind in this ground. For convenience of reference the names are given according to the last Conchological Society’s list (Journ. Conch., vol. x, 1901, pp. 10-26). ‘The remains of bivalves are in such fragmentary condition that it is only possible to identify them in one or two eases. The following is the list of species :— Mytilus edulis, L., several. Bittium reticulatum (da C.), com- Cardiumsp.(?),fragmentscommon mon. Saxicara arctica, L., one valve. Triforis perversa (L.), one. Acmea virginea (Miill.), two. Cerithiopsis concatenata, Conti, Gibbula cineraria (L.), two. one. Phasianella pullus (.), common. Odostomia turrita, Hanley, one. Lacuna divaricata (¥.), one. Brachystomia rissoides (Hanley), LL. parva (da C.), one. one. Inttorina rudis (Maton), several. Pyrgulina interstincta (Mont.), Rissoa parva (da C.) and var. three. interrupta, Ad., both equally Aulima bilineata (Alder), one. common. Caecum imperforatum (G. Ad.), Alvania punctura (Mont.), two. four. Manzonia costata (J. Ad.), three. —C. glabrum (Mont.), one. Onoba_ striata (J. Ad.), very Buecinum undatum, L., one. common. Purpura lapillus, 1., one. var. aculeus, Gld., one. Mangilia costata (Don.), one. Cingula semistriata (Mont.), Clathurella linearis (Mont.), two. three. Tornatina truncatula (Brug.), Barleeia rubra (Mont.), one. three. 64 NOTE ON THE ERATO GUTTULA OF SOWERBY AND ON MARGINELLA SCHEHEPMANI, N.N. FOR M. ABYSSICOLA, SCHEPMAN. By J. R. 1s Bavomrm, MA.,, FBS: Read 9th June, 1916. I. Erato eurruta, Sowerby. Sowersy’s Erato guttula' was correctly referred to the genus Marginella by Weinkauff,* but he is wrong in suggesting its identity with JL. oster?, Jouss., or IL. serrata, Gask. Smith?® correctly unites it with J/. triplicata, Gask. Sowerby’s figure is all but unmistakable, and quite lately I found an interesting confirmation of Smith’s verdict on an old tablet from Dr. Gray’s collection in one of the British Museum drawers, marked ‘‘ Ilarginella guttula, Sowerby, Isle of France”’, and bearing examples of the shell we generally know as M. triplicata, Gask. For the future the species must be called M. guttula, Sow., since this name is twelve years earlier than Gaskoin’s. This change invalidates JZ. guttula, Reeve (1865), which I regard as a perfectly distinct species, and not a variety of JL. avena, Kiener, as indicated by Tryon and others. I propose, therefore, to rename it M. pericalles. Very beautiful living specimens of it were collected in Bermuda by Colonel Peile. Il. Mareinerta asysstcora, Schepman. This species is Gescribed in the Prosobranchia of the Siboga Expedi- tion, pt. iv, p. 260, pl. xviii, fig. 8 (September, 1911), from a single example dredged in the Banda Sea. Locard,* however, described a Gibberula abyssicola in 1897 from the Travailleur and Talisman Expedition, and since Gibderula is, in my opinion, a division of very shght importance, and certainly not of generic value, I propose. to call the Siboga shell Jarginella schepmani, after the painstaking author of the monograph. 1 Conch. Illust., Cypreade, p. 16, pl. vii, fig. 50. 2 Conch. Cab., p. 156. * Proc. Malac. Soc., vol. ix, p. 21. 4 Exp. Sci. du Travailleur et du Talisman, vol. i, p. 130, pl. iv, figs. 22-5. NOTES ON THE FAMILY AMPULLARIID2. By G. B. Sowerny, F.L.S. (Continued from Vol. VIII, pp. 345-364, and Vol. IX, pp. 56-64.) Read 14th April, 1916. Genus LANISTES, Montfort, 1810. THe genus Lanistes embraces all the sinistral species of the family,! and I see no valid reason for separating J/eladomus (Swainson) from it; still less can I agree with Bourguignat in dropping the name Lanistes in favour of Meladomus. Bourguignat gives as his reason that the prior name was used by Humphrey (Musewm Calonnianum, 1797) for a species of Mytilus, but it has been very properly decided that these mere catalogue names should have no status as to priority. Moreover, my copy of the Mus. Calonn. makes no mention of “« Lanistes”’, but ‘‘ Lanatus”’ stands for a variety of Mytilus discors. The genus Leroya, Grandidier (Bull. Soc. Malac. France, iv, 1887, p- 185), 1 place as a sub-genus having spiral sculpturation. In compiling the following list of species and synonyms I have been compelled, after comparing numerous examples, to place in the synonymy many names that have generally been accepted as applied to valid species. ‘There are others of which I have not seen sufficient numbers to enable me to decide whether they are good species or not; these I have allowed provisionally to stand. , 1. LanistEs cartnatus, Olivier. Helix bolteniana, Chemnitz, Conch. Cab., vol. ix, 1786, p. 83 [non binom. ]. Cyclostoma carinatum, Olivier, Voy. Emp. Ottom., vol. ii, 1804, p. 39. Ampullaria carinata, Lamarck, Anim. sans Vert., vol. vi, pt. 2, 1822, peli: A, bolteniana, Philippi, Mon. Amp., 1850, p. 20, pl. vi, figs. 4, 5. A. agyptica, Khrenberg, [MS. in] Mus. Berol., Jickeli, Fauna Moll. N.-O. Afrika, Nova Acta Acad. Cees.-Leop., xxxvii, 1874, ODA Fee donnie boltenianus, Bourguignat, Moll. Egypte, L879; p41; Ampullaria bicarinata, Nevill, Moll. Ind. Mus. Calcutta, Pt. ii, 1884, p- 14. This is scarcely separable even as a variety. The peripheral and umbilical keels are generally more or less prominent in the earlier stages of development. A. depressa, Nevill, Moll. Ind. Mus. Calcutta, Pt. ii, 1884, p. 14. ' The more or less depressed examples cannot be definitely separated from the typical form. ‘ The only sinistral Ampullaria of which I have heard is a ‘‘ subvar. sinistrorsa’’? of A. globosa, described by Nevill in the Indian Museum, Calcutta, which is probably unique (Hand List Moll. Ind. Mus., pt. ii, 1884, p. 2). 66 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Lanistes duveyrarianus, Revoil, Bull. Soc. Malac. France, vol. ii, 1885, p. 99: pl. vi, fie. 0. Hab.—River Nile. 2. LanistEs BouRGUIGNONI, Putzeys. Putzeys, Bull. Soc. Roy. Malac. Belg., vol. xxvii, 1898, p. 28. Hab.—Mouth of Linoma River, Congo. 3. LanistEs coneicus, Bottger. In Schepman’s notes on Leyden Mus., vol. xiii, 1891, p. iii. Hab.—Congo. 4. Lawnistes Fost, Germain. Bull. Mus. Hist. Nat. Paris, vol. xi, 1905, p. 256. Hab.—Upper Congo. 5. Lanisres Grasset, Morelet. Journ. de Conch., vol. xi, 1863, p. 267, pl. x, fig. 2. Hab.—Madagascar. In this species the vertical riblets are unusually prominent, giving the shell somewhat the appearance of a bulbous Apztonium. 6. Lanisres eurnaicus, Lamarck. Cochlea guinaica, Chemnitz, Conch. Cab., vol. ix, 1786, p. 8 [non binom. ]. Ampullaria guinaica, Lamarck, Anim, sans Vert., vol. vi, pt. 2, 1822, p- 178. Hab.—Lagos, Gaboon, etc. 7. LanisrEs HoLtosroma, Morelet. Journ. de Conch., vol. viii, 1860, p. 191. Hab.— Guinea. 8. LanisrEs rnneEsI, Pallory. Bull. Inst. Egypt., ser. rv, No. 8, 1902, p. 91. Hab.—Upper Nile. 9. Lanisres rntorrus, Lamarck. Ampullaria intorta, Lamarck, Anim. sans Vert., vol. vi, pt. 2, 1822, je A, intorta, Philippi, Mon. Amp., 1850, p. 23, pl. vi, fig. 3. Lanistes plicosus, Martens, Novitates, vol. vy, 1877-9, p. 191, pl. elvi, figs. 3-6. Hab.—Zambi (Mayumbe), Congo (Dupuis & Putzeys). 10. Lanisres Jouserti, Bourguignat. Meladomus jouberti, Bourg., Icon. Anim. Moll. Tanganyika, 1888, pl. vi, fig. 6. Hab.—Wake Tanganyika. This may prove to be a gigantic form of Z. ovum. SOWERBY : ON THE FAMILY AMPULLARIIDZ. 67 11. Lanisres LETouRNEUXI, Bourguignat. Meladomus letourneuxi, Bourg., Moll. Abyss. Egypte, 1879, p. 41. Lanistes letourneuxi, Smith, Proc. Zool. Soc., 1881, p. 276. Hab.—South Egypt. 12. Lanisres tyzrcus, Morelet. Ampullaria lybica, Morelet, Rev. Zool., 1848, p. 354. A, lybica, Philippi, Mon. Amp., 1850, p. 25, pl. vi, fig. 8. A. bernardiana, Morelet, Journ. de Conch., vol. viii, 1860, p. 190. Meladomus vignoni, Bourg., Moll. Afr. Equat., 1889, p. 177. M. pfeifferi, Bourg., ib., p. 178. M. alexandri, Bourg., ib., p. 178. Evidently an immature shell. Var. nsendweensis, Dupuis & Putzeys, Ann. Roy. Soc. Malac. Belg., vol, xxxvi, 1901; p. 94. Hab.—Gaboon, Assinia, Congo, Guinea, etc. This species, though subject to much variation, is easily separable from all others. ‘The forms which authors have named as species are scarcely varieties, but denote differences in age and development. 13. Lanistes scHweEtnFurtal, Ancey. Mém. Soc. Zool. France, vol. vii, 1894, p. 223. Hab.—Victoria Nyanza. 14. Lanisres macnus, Furtado. Journ. de Conch., vol. xxxiv, 1886, p. 147, pl. vi, fig. 3. Hab.—WUnuapula River. 15. Lanisres NeAveI, Melvill & Standen. Mem. and Proc. Manchester Lit. and Sci. Soc., vol. xli, 1907, p. 6. Hab.—Mtesize River, Loangua, and Zambezi River. 16. Lanistes niLoricus, Sowerby. In Swainson’s Zool. Ilust., ser. u, 1831, pl. xxxviil, fig. 3. Hab.—Kiver Nile. 17. Lanistes nyassaNnus, Dohrn. Proc. Zool. Soc., 1877, p. 715, pl. lxxiv, fig. 8. Hab.—ULake Nyassa. 18. Lanisres ovum, Peters. Ampullaria ovum, Peters, Arch. Natur., 1835, p. 215; Philippi, Mon. Amp., 1851, p. 22, pl. vi, fig. 2. Lanistes ellipticus, Pfeiffer, Novit. Conch., 1866, p. 294, pl. Ixx, figs. 9, 10. L. ovum, var. elatior, Pfeiffer, Novit. Conch., vol. ii [1870], p. 291, plalxx, figs. 7, 8. L. affinis, Smith, Proce. Zool. Soc., 1877, p. 716, pl. lxxiv, fig. 7. After comparing a large number of specimens, I am compelled to unite this with Z. ovum. 68 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. L. ellipticus, var. trapeziformis, Furtado, Journ. de Conch., vol. xxxiii, 1885, p. 150. L. ellipticus, var. luapulensis, Furtado, Journ. de Conch., vol. xxxiii, 1885, p. 161. LL. zambezianus, Furtado, Journ. de Conch., vol\xxxiy, 1886, p. 148, ple va, fig. 2. 4 Meladomus ambiguus, Bourg., Moll. Equat. Afr., 1889, p. 172. M., deguerryanus, Bourg., Moll. Kquat. Afr., 1889, p. 175. Evidently a young shell. Lanistes affinis, var. manayarana, Sturany, in Baumann, Durch Massailand, 1894, p. 310, taf. xxiv, fig. 32. . Hab.—Mozambique, Angola, Lake Nyassa, etc. 19. Lanisrrs patusrris, Morelet. _ Ampullaria palustris, Morelet, Journ. de Conch., vol. xii, 1864, Dy Los: Hab.—Senegal. 20. LanisTEs OLIVACEUs, Sowerby. Paludina olivacea, Sowerby, Gen. of Shells [ No. 41, 1834, Paludina, fig. 3]. hae purpurea, Jonas, Arch. Naturg., 1839, p. 242, pl. x, fig. 1. Bulimus tristis, Jay, Cat. of Shells, 1839, p. 121, pl. vii, fig. 1. Meladomus bulimoides, Swainson, Treat. on Malacology, 1840, p. 340. M. olivaceus, Sow. (selected as ‘the type of the genus), Gray, Proc. Zool. Soc., 1847, p. 148. MM. olivaceus (Sow. ys I. & A. Adams, Gen. of Shells, i, 1858, p. 349, pl. xxxvi, fig. 6. M. pyramidalis, Letourneux, in Bourg. Moll. Egypte, Abyssinia, ete., 1879, p. 36. Ampullar ia procera, Mancens; Novit. Conch., vol. ii [1870], p. 292, pl dacxt, fies. 1, Meladomus Say ae ‘Bourg. , Moll. Equat. Afr., 1889, p. 171. M. bloyeti, Bourg., ib., 1889, p. 171. Hab.—Mozambique, Zanzibar, Ousaghara, Congo, etc. A very variable and widely distributed species. The shells are generally pyramidal in form, but they sometimes partake of a more oblong-oval shape. Some are distinctly umbilicated, others almost or quite imperforate. 21. Lanisres sintsrrorsvus, Lea. Paludina sinistrorsa, Lea, Trans. Amer. Phil. Soc., vol. vi, 1839, p. 98, pl. xxi, fig. 78. Ampullaria sinistrorsa, Philippi, Mon. Amp., 1850, p. 64, pl. xxi, Mes Be Hub.—Usagara, and Lake Tanganyika. 22. LanisrEs souipus, Smith. Proc. Zool, Soc.; 1877, p. 716, pl. lexiv, figs. 10, 11: SOWERBY: ON THE FAMILY AMPULLARIIDZ. 69 23. Lanistes suscarinatus, Sowerby. Ampullaria subcarinata, Sowerby, Gen. of Shells, [ No. 4, 1822]. Hab.—Congo. 24. Lanisres StUHLMANNI, Martens. Besch. Weichth. Ost. Afr. (Deutsch-Ost- Afrika, vol. iv), 1898, p. 171, pl. vi, fig. 37. Hab.—Congo (Dupuis & Putzeys). Sub-genus LEROYA, Grandidier. Bull. Soc. Malac. France, vol. iv, 1887, p. 185. 25. Lanisres (Lreroya) cHarmeranti, Grandidier. Leroya charmetanti, Grandidier, Bull. Soc. Malac. France, vol. iv, 1887, p. 193. Hab.—Lake Tanganyika. 26. Lanistes (Lrroya) poureurenatr, Grandidier. Leroya bourguignati, Grandidier, Bull. Soc. Malac. France, vol. iv; 1887, p. 182. Hab.—Uake Tanganyika. 27. Lanisres (Lrroya) criratus, Martens. Lamstes ciliatus, Martens, Monatsber. K. Acad. Wiss. Berlin, 1875, p. 296, pl. il, figs. 8-10. Hab.— Zanzibar. 28. Lanistes (LeroyA) FARLERI, Craven. Lanistes farlert, Craven, Proc. Zool. Soc., 1880, p. 218. L. sculptus, Martens, Sitz. Ber. Naturf. Freunde Berlin, 1887, p. 96. Hab.—Magela, Usambasa. AMPULLARIA. The following names have been omitted :— 154, Ampurtarta (Pita) porrra, Deshayes. Encyc. Méth. Vers., vol. ii, 1830, p. 31; Reeve, Conch. Icon., sp. 35. Ampullaria virescens, Deshayes, Dict. Class. Hist. Nat., tom. xvii, 1831, pl. Ixxxvu, fig. 2. A. pagoda, Morelet, Journ. de Conch., vol. xiii, 1865, p. 227. A. polita, var. compressa, Nevill, Moll. Ind. Mus., Pt. ii, 1884, p. 7. A, polita, var. major, Dautz. & Fisch., Journ. de Conch., vol. liu, 1906, p. 426. A. brohardi, Granger, Le Naturalist, 1892, p. 79. The last is a remarkable abnormal form (E. A. Smith, Proc. Malac. Soc., vol. iv, 1900, p. 40). Hab.—Cambodia. 155. Ampuntarta (Pina) ruFintneata, Reeve. Conch. Icon. Amp., sp. 7. Hab.—Pegu. VOL. XII.—NOV. 1916. 6 70 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 156. AMPULLARIA IMPERFORATA, Swainson. Philos. Mag., 1823, p. 401. I am quite unable to identify this, as the description is very vague and the habitat unknown. Swainson takes it for a western form, but not knowing the operculum he says ‘“‘ operculum corneum ? ”” ApprrionaL Synonymic Names. Ampullaria conica, Swainson=vrrens, Lamarck (see Proc. Malac. Soc. wl, ax, p. Ol). A. borealis, Valenciennes= Natica HEros, Say. A. caliginosa, Reeve=pratuposa, Say, Proce. Malac. Soc., vol. viii, Pp. o08; Vol. 1x, p. 64. A. rugosa, Valenciennes = vol. vill, p. 358. unceus, Miller, Proc. Malac. Soc., Inpex to tHE Names CITED IN THESE Notes. adusta, Reeve, ix, 56. egyptica, Ehren., xii, 65. affinis, Smith, xii, 67. africana, Marts., ix, 56. alexandri, Bourg., xii, 67. alucinans, Sow., ix, 63. amazonica, Reeve, viii, 346, 363. ambiguus, Bourg., xii, 68. ampullacea, Linn., ix, 56. aperta, Phil., ix, 57. aperta, Reeve, viii, 349. archimedis, Spix, viii, 359. aulaniert, Hupé, viii, 346. auriformis, Reeve, viii, 346. aurostoma, Reeve, viii, 347. australis, Orb., viii, 352, 353. autumnalis, Reeve, viii, 357. avellana, Sow., viii, 360. baeri, Dautz., viii, 346. balanoidea, Gould, ix, 57. balteata, Phil., viii, 350. begint, Morlet, ix, 57. belizensis, Cr. & F., viii, 352, 363. bernardianus, Morel., xii, 67. bicarinata, Nev., xii, 65. bilineata, Reeve, ix, 57. bloyeti, Bourg., xii, 68. bolteniana, Ch., xii, 65. borealis, Val., xii, 70. borneensis, Phil., ix, 57. bourguignatr, Billotti, ix, 60. bourgwignati, Grand., xii, 69. bourguignont, Put., xii, 66. bridouxi, Bourg., ix, 60. bridgesi, Reeve, viii, 346. brohardi, Grang., xii, 69. brown, Jay, viii, 347. bulimoides, Swains., xii, 68. bulla, Reeve, viii, 346. buxea, Reeve, viii, 346. caliginosa, Reeve, xii, 70. canaliculata, Lam., viii, 346, 363. canaliculata, Orb., viii, 348. canaliculata, Deless., viii, 350. canaliculata, Reeve, viii, 346 ; ix, 61. carinata, Lam., xii, 65. carwmata, Swains., ix, 61. carinatus, Oliv., xii, 65. cassidiformis, Reeve, viii, 349. castellot, Sow., viii, 346. catamarcensis, Sow., viii, 347. cecillet, Phil., ix, 57. celebensis, Quoy & G., ix, 56. cerasum, Hanley, viii, 347. charmetanti, Grand., xii, 69. chemnitzt, Phil., viii, 354. chevalieri, Germ., ix, 57. chiquitensis, Orb., viii, 359. ciliatus, Marts., xii, 69. cimerea, Reeve, ix, 58. cingulata, Phil., viii, 347. citrewm, Reeve, viii, 347. columellaris, Gould, viii, 347. compacta, Reeve, ix, 57, 62. complicata, Reeve, ix, 57. compressa, Ney., xii, 69. congicus, Bottg., xii, 66. conica, Gray, 1x, 57. conica, Swains., Lam., xii, 70. conoidea, Marts., viii, 347. cornuarietis, Linn., viii, 359. cornucopia, Reeve, viii, 347. corrugata, Swains., ix, 58. costaricana, Marts., viii, 347. cousint, Jouss., vill, 347. crassa, Swains., viii, 347. crocostoma, Phil., viii, 350. crosseana, Hid., vili, 348. cubensis, Reeve, viii, 350. cumingt, King, viii, 348. SOWERBY : ON THE FAMILY AMPULLARIID A, 71 cuprina, Reeve, viii, 351. cyclostoma, Spix, viii, 348. dacoste, Sow., viii, 359. dalyi, Blan., ix, 56, 58. decocta, Mab., ix, 58. decussata, Moric., viii, 348. dequerryanus, Bourg., xii, 68. depressa, Say, viii, 351. depressa, Nev., xii, 65. dira, Reeve, ix, 58. dolioides, Reeve, viii, 348. doliwm, Phil., viii, 358. d@ orbignyana, Phil., viii, 348, 363. dubia, Guild., viii, 350. dumesmiliana, Billotti, ix, 60. duvayrarianus, Revoil, xii, 66. dysoni, Hanley, viii, 352; ix, 64. effusa, Miiller, viii, 350. elatior, Pfr., xii, 67. electrina, Reeve, viii, 349. elegans, Orb., viii, 348. ellipticus, Pfr., xii, 67, 68. encaustica, Reeve, ix, 59. erogata, Cr. & F., viii, 349. erronea, Nev., vill, 349. erythrocheila, Dtz. & F., ix, 61. erythrostoma, Reeve, viii, 349, 363. eumicra, Cr. & F., viii, 349. exigua, Phil., ix, 58. eximea, Dkyr., viii, 349. expansa, Miller, viii, 349. expansa, Nev., ix, 56. exumbilicata, Spix, vili, 347. farleri, Craven, xii, 69. fasciata, Lam., ix, 56. fasciata, Reeve, viii, 353. fasciata, Han. & Th., ix, 59. fasciata, Roissy, ix, 56. fasciata, Swains., viii, 354. figulina, Spix, viii, 349. filosa, Reeve, ix, 59. fischbeini, Dohrn, ix, 62. flagellata, Say, viii, 352. flatilis, Reeve, viii, 352. foai, Germ., xii, 66. fuliginea, Phil., ix, 58. fumata, Reeve, viii, 352. georgi, Williams, viii, 353. geveana, Phil., viii, 350. geveanensis, Desh., viii, 350. ghiesbreghti, Reeve, viii, 349. gigantea, Trist., viii, 350. gigas, Spix, viii, 350. glauca, Linn., viii, 350. globosa, Swains., ix, 58. gordoni, Smith, ix, 59. gosset, Reeve, viii, 351. gracilis, Lea, ix, 59. gradata, Smith, ix, 59. granulosa, Sow., viii, 351, grassett, Morel., xii, 66. gruneri, Phil., ix, 56. guadeloupensis, Marts., viii, 350. guatemalensis, Morelet (?), viii, 352. guayanensis, Lam., viii, 351, 363. guinaicus, Lam., xii, 66. hemastoma, Reeve, viii, 349, 363. hanleyi, Reeve, vili, 356. haustrum, Reeve, viii, 351, 363. hepataria, Reeve, viii, 351. holostoma, Morel., xii, 66. hondurasensis, Reeve, viii, 352. hopetonensis, Lea, viii, 351, 363; ix, 64. ammersa, Reeve, viii, 351, 363. umperforata, Swains., xii, 70. ampervia, Phil., viii, 353, 363. incrassatula, Nev., ix, 59. wmnesi, Pall., xii, 66. annexa, Cr. & F., viii, 353. imops, Morel., ix, 57. aimsularum, Orb., viii, 353, 363. intermedia, Fér., viii, 357. uuterrupta, Sow., viii, 361. awntortus, Lam., xii, 66. antropicta, Reeve, viii, 348. javanica, Reeve, ix, 58. jouberti, Bourg., xii, 66. knorri, Phil., viii, 359. kordofana, Parr., ix, 60. labiosa, Koch., viii, 354. lamarcki, Phil., viii, 352. largillierti, Phil., ix, 59. largillierti, Reeve, ix, 61. lattret, Reeve, viii, 354. layardi, Reeve, ix, 62. lennriscata, Cr. & F., viii, 352, 363. leopoldvillensis, Putz., ix, 59. letourneuxt, Bourg., ix, 59; xii, 67. leucostoma, Swains., viii, 358. levior, Sow., viii, 361. lineata, Spix, viii, 354. linnei, Phil., viii, 354. livescens, Reeve, viii, 352. longispira, Nev., ix, 59. lwapalensis, Furt., xii, 68. lubrica, Reeve, ix, 58. lucida, Parr., ix, 60. luteostoma, Swains., viii, 350. luzonica, Reeve, ix, 59. lybicus, Morel., xii, 67. lymnefornus, Reeve, viii, 354. madagascariensis, Smith, ix, 60. magnifica, Dkr., ix, 56. magnus, Furt., xii, 67. magior, Dautz. & F., xii, 69. malabarica, Phil., ix, 62. malleata, Jonas, vili, 352. ~I bo PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. manayarana, Sturany, xii, 68. physis, Hupé, viii, 356. marginatra, Jonas, viii, 359. physoides, Reeve, viii, 356. martensiana, Ney., vili, 352. picta, Reeve, viii, 356. martinezt, Hid., viii, 354. pilula, Reeve, ix, 56. maura, Reeve, ix, 62. pinet, Dall, viii, 356. megastoma, Sow., vili, 359. planorbula, Phil., viii, 359. melanocheila, Reeve, viii, 357. plate, Maton, viii, 356. metcalfei, Reeve, viii, 354. plate, Orb., viii, 356. miamensis, Pilsb., viii, 354. plicosus, Marts., xii, 66. miltocherlus, Reeve, viii, 348. polita, Desh., xii, 69. modesta, Busch., viii, 354. porphyrostoma, Reeve, viii, 353. moesta, Reeve, ix, 60. procera, Marts., xii, 68. monacha, Cr. & F., viii, 354. producta, Reeve, viii, 356. naticoides, Orb., viii, 356. prunulum, Reeve, viii, 350. neavet, Melv. & Stand., xii, 67. pulchella, Anton, viii, 348. neritoides, Orb., viii, 359. pulchra, Gray, viii, 356. nigricans, Sow., ix, 63. puncticulata, Swains., viii, 356. nigrilabris, Phil., viii, 355. puntaplaya, Cousin, viii, 356. niloticus, Sow., xii, 67. purpurascens, Guppy, viii, 356. nitidissimus, Bourg., xii, 68. purpurea, Jonas, xii, 68. nobilis, Reeve, viii, 355. pyramidalis, Letour., xii, 68. notabilis, Reeve, viii, 355. pyranidalis, Phil., viii, 353. novegranade, Busch., viii, 355. pyrum, Phil., viii, 353, 359. nsendweensis, Dup. & Put., xii, 67. quercina, Spix, viii, 355. nubila, Reeve, viii, 353, 363. quinquidensis, Miller, viii, 357. nux, Reeve, ix, 61. quitensis, Busch., viii, 348. nyanz@, Smith, ix, 60. raymondi, Bourg., ix, 60. nyassanus, Dohrn, xii, 67. refleca, Swains., viii, 353. oblonga, Swains., vili, 355. retusa, Olfers, viii, 353. occidentalis, Mouss., ix, 60. reyert, Cousin, viii, 357. occlusa, Cr. & F., vili, 352, 363. robusta, Phil., viii, 357. occulus-communis, Gmel., viii, 350. roissyt, Orb., vili, 348. ochracea, Jay, ix, 56. rotula, Mouss., viii, 359. olea, Reeve, ix, 60. rotundata, Say, viii, 357. olivacea, Spix, viii, 355. rufilineata, Reeve, viii, 357; xii, 69. olwaceus, Ad., xii, 68. rugosa, Lam., viii, 358. olivaceus, Sow., xii, 68. rugosa, Sow., ix, 58; xii, 68. oliviert, Desh., viii, 347. rugosa, Val., xii, 70. orbata, Perry, ix, 56. saxea, Reeve, ix, 61. orientalis, Phil., ix, 58. scalaris, Orb., viii, 357. oronocensis, Reeve, viii, 351. schranumi, Crosse, viii, 357. ovata, Oliv., ix, 60. schweinfurthi, Ancey, xii, 67. oviformis, Desh., viii, 355. sculptus, Marts., xii, 69. ovum, Peters, xii, 66, 67. scutata, Mouss., ix, 58. pachystoma, Phil., viii, 350. semitecta, Mouss., viii, 357. pagoda, Morel., xii, 69. simplex, Reeve, viii, 357. pallens, Phil., ix, 62. simamarina, Bourg., viii, 357. paludinoides, Ph., ix, 57, 62. sinistrorsa, Nev., ix, 59. paludosa, Say, vili, 352; ix,64; xii,70. sinistrorsus, Lea, xii, 68. palustris, Morel., ix, 61; xii, 68. solidus, Smith, xii, 68. papyracea, Spix, viii, 355. sordida, Swains., viii, 357. pealeana, Lea, viii, 355. speciosa, Phil., ix, 61. perakensis, Morgan, ix, 56, 61. spherica, Hanley & T., ix, 59. pernambucensis, Reeve, vili, 355. spiai, Orb., viii, 348. peristomata, Orb., viii, 348. sprucet, Reeve, viii, 347. pertusa, Sow., vill, 355. stoliczkana, Ney., ix, 58. petiti, Crosse, viii, 356, 363. storeria, Jay, viii, 358. pfeifferi, Bourg., xii, 67. strebeli, Marts., viii, 358. pheostoma, Phil., viii, 353. stuhlmanni, Marts., xii, 69. SOWERBY: ON THE subanpullacea, Nev., ix, 61. subcarinatus, Sow., xii, 69. subglobosa, Nev., ix, 61. subscutata, Mouss., ix, 61. sumatrensis, Phil., ix, 56. swainsoni, Phil., viii, 354, 358. swainsont, Reeve, viii, 354. tamsiana, Phil., viii, 358, 364. tenuissima, Jonas, viii, 358. testudinea, Reeve, viii, 358. theobaldi, Hanley, ix, 61. trapeziformis, Furt., xii, 68. tristis, Jay, xii, 68. trochulus, Reeve, viii, 358. turbinis, Lea, ix, 56, 61. turbinoides, Reeve, ix, 58. urceus, Miill., viii, 358; xii, 70. venetus, Reeve, viii, 352. FAMILY AMPULLARIID, vermiformis, Reeve, viii, 353, 363. vexillum, Reeve, viii, 356. vignont, Bourg., xii, 67. villata, Marts., viii, 350. violacea, Val., viii, 358. virens, Lam., ix, 61; xii, 70. virescens, Desh., xii, 69. vitrea, Born., ix, 62. vittata, Reeve, ix, 62. wellesleyana, De Morg., ix, 56. wellesleyensis, De Morg., ix, 62. wernet, Phil., ix, 62. winkleyi, Pilsb., ix, 62. woodwardi, Dohrn, ix, 62. yatest, Reeve, vili, 358. yucatanensis, Cr. & F., viii, 353. zambezianus, Furt., xii, 68. zonata, Spix, vili, 359. “I ie) 74 DESCRIPTIONS OF SEVEN NEW SPECIES OF MOLLUSCA BELONGING TO THE GENERA DRILLIA, CLAVATULA, HPITONIUM, CANTHARIDUS, BITTIUM, FISSURELLA, AND CARDIUM. By G. 3B. Sowrrsy, F.L.S. Read 12th May, 1916. PLATE Ih ies: 1-8: 1. Dents CARMEN, nesp. (Pl. VET) Fis.52; Testa fusiformis, fulvo-albida, fusco pauci-maculata ; antice breviter rostrata, postice elato-turrita; spira elongata, acuta; anfractus 84, primi 2 leves, nitentes, leviter obiique contorti, cateri convexi, spiraliter regulariter filo-lirati, longitudinaliter crassi-plicati, plicis rotundatis, obtuse angulatis, interstitiis pallide fusco maculatis; sutura leviter impressa; anfractus ultimus + longitudinis teste gquans, supra obtuse angulatus, deinde leviter convexus, infra medium contractus et attenuatus; apertura oblonga, canalis productus, latiusculus; columella rectiuscula, antice producta; labrum acutum, sinu postico latiusculo. Long. 18, maj. diam. 8 mm. Hab.—Goto, Hizen, Japan (Hirase). A typical Drillia, with somewhat angular whorls, and numerous rounded longitudinal plice ; finely spirally lirate throughout. The plicee are rendered conspicuous by the light-brown colouring of the interstices. Perhaps the nearest species is D. griffithi, from which it may be readily distinguished by its much more delicate sculpture. 2. CLAvaTuLA DEcoRATA, n.sp. Pl. III, Fig. 1. Testa fusiformis, tenuis, fulvo-fusca ; spira acute turrita, elata; anfractus 19, concavi, leves, inferne carina conspicua albo anguste zonata multi-tuberculata et fusco interruptim unilineata ornata ; sutura sulcata, infra carina levis angusta marginata; anfractus ultimus +4 longitudinis testa eequans, supra valde concavus, ad peripheriam carina tuberculata per-prominens instructus (tuberculis albis oblique verticalis) infra angulum anguste spiraliter grano-liratus, deinde contractus et rostratus; apertura mediocriter lata, canalis longus ; labrum tenue, postice late et profunde sinuatum. Long. 21, diam. 8 mm. I have only seen a single individual of this species. It was found in the collection of the late Admiral Keppel without any indication of its habitat, but comes very likely from Sierra Leone, where the Admiral collected largely. The shell is one of striking character, the whorls being unusually concave, with a stout prominent keel, crossed by numerous oblong somewhat oblique white tubercles or short plice, which are rendered more conspicuous by a brown intersecting spiral line. 3. Epirontum rEYNoLDSI, n.sp. Pl. III, Fig. 4. Testa imperforata, angusta pyramidata, solidiuscula, fusco-grisea, albo-balteata; spira turrita, acuta; anfractus 10, rotundati, obscurissime SOWERBY : SEVEN NEW SPECIES OF MOLLUSCA. 75 eancellati, varicibus inequalibus subdistantibus plerumque tenuibus, hic illic plusminusve crassis muniti; sutura angusta; anfractus ultimus + longitudinis teste sequans, fusco bizonatus, albo late balteatus; apertura fere circularis; peristoma crassum, album. Long. 18, maj. diam. 7 mm. Hab.—F lorida (Reynolds). This species, of which I have only seen a single specimen, was sent by Mr. Reynolds, of Florida. It differs considerably from any ofits congeners. Its surface is rendered slightly rugose by very faint eancellating striz, and its varices are for the most part thin, and very slightly raised; but at distant intervals there are a few much stouter ones. I have been at variance with several eminent conchologists con- cerning the substitution of the name Scala for Scalaria (see Ann. Mag. Nat. Hist., November, 1903). I am now glad that the question is settled by discarding both these names in favour of Epitonium, Bolton (1798), which has priority. 4, CanrHaRipUs RARIGUTTATUS, n.sp. PI. III, Fig. 8, Testa conica, profunde umbilicata, fusca, hic illic sparsim albo maculata et flammulata; spira elata, lateribus leviter convexis ; anfractus 5, convexiusculi, liris numerosis confertis leviter elevatis spiraliter cingulati, oblique tenuissime striati; sutura anguste canaliculata; anfractus ultimus % longitudinis teste equans, ad peripheriam obtuse angulatus, ad basim convexus, umbilicus excavatus, intus rotundus, profundus; apertura subquadrata, intus iridescens ; columella crassa, albida rectiuscula; peristoma simplex, tenue. Long. 12, diam. 10 mm. Hab.—New Caledonia. A shell having the prevailing form of a Cantharidus. It is dark brown in colour, with here and there a few whitish spots and streaks, spirally closely lirate, iridescent within. I have seen ten specimens varying very little in form, but some of them are almost, or quite, destitute of the whitish markings mentioned. 5. Brrrium perspicuum, n.sp. Pl. III, Fig. 3. Testa elongata, angusta, tenuis, imperforata, fusca, varicibus per- conspicuis albis distantibus munita; spira elongata ad apicem angustissima ; anfractus 12, leviter convexi, spiraliter dense et rugose lirati, sutura valde impressa sejuncti; anfractus ultimus brevis, brevissime rostratus; apertura subquadrata, brevis; peristoma simplex, tenue. Long. 6, diam. 2 mm. Hab.—Trincomalee, Ceylon. This species is chiefly distinguished by its prominent, irregularly distant, short, white varices. 6. Fissunetta (Gryprus) sacax, n.sp. Pl. III, Figs. 5, 6. Testa ovalis, mediocriter lata, elata, luteola, costis radiantibus creberrimis leviter nodulosis, et liris concentrices irregularibus decussata; antice turgida, postice breviter declivis, ad apicem 76 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. mucronata; foramen parvum, oblongum, leviter constrictum, multo antimedium situm; pagina interna alba, supra callo denticulata induta, ad marginem crenulata. Long. 8, lat. 7, alt. 5 mm. Hab.—New Caledonia. Of this curious little species I have only seen four specimens, two quite young and two apparently adult. The adult are peculiarly swollen on the back, and in both young and old the border of the foramen is curiously mucronate. 7. Carpium FuLronr, n.sp. Pl. III, Fig. 7. Testa oblique subovalis, crassiuscula, leviter inflata, alba, maculis numerosis vivide rufo-fuscis pulcherrime ornata, radiatim costata; costis circiter 27 prominentibus, valde nodosis; interstitiis profundis, transversim sulcatis; umbones mediocriter elevati, latiusculi. Umbono-marg. 37, antero-post. 33 mm. Hab.—Philippines. A pretty shell, ornamented with red-brown spots on a white ground. The ribs are rather peculiarly knotted, especially on the anterior side. The form and general aspect of the shell are somewhat similar to that of a recent Zrigonia. I have only seen a single example of this species. EXPLANATION OF FIGURES ON PLATE III. Fics. 1. Clavatula decorata, n.sp. 2. Drillia carmen, n.sp. . Bithium perspicuum, n.sp. . Epitoniwm reynoldsi, n.sp. . Fissurella sagax, n.sp., lateral view. », apical view. . Cardium fultoni, n.sp. . Cantharidus rariguttatus, n.sp. DID WE oo Proc.Marac.Soc.Lonp. VoL.XII,PuIll. an \ \ ih \ [a S itl m Wi YY ji})) COW, 1 Xd \~ = \ a Wey) : ity \ Li Wy y G.M.Woodward del Huth photodith SEVEN NEW SPECIES OF MARINE MOLLUSCA, TORE WUSRE ClES OF PARPULNA. —I ~I NOTES ON A SMALL COLLECTION OF HELICOID LAND SHELLS FROM THE SHOUTEN ISLANDS, DUTCH NEW GUINEA, WITH DESCRIPTIONS OF TWO NEW SPECIES OF PAPUINA. By Huenw C. Forron. Read 14th April, 1916. PLATE III, Fies. 9-14. Te shells here noted were collected by Mr. Pratt on the Island of Wiak and a smaller unnamed island to the south-east of it. 1. Xesta avtica, Pfr. Wiak I. A number of examples of this species were obtained, most of them being the usual colour varieties, but two are new to me; one has the apical whorls white, whilst the lower whorls are covered with a very light uniform greenish-yellow periostracum ; the other shows various shades of brown from reddish to a dark smoky brown; both varieties have the usual darker-coloured spiral band and are not polished, but exhibit a duller surface than is usual in this protean species. 2. Xesra FRAUDULENTA, Smith. Wiak I. In addition to the typical form one or two specimens were collected that have a narrow spiral band of darker colour situate just above the periphery of the last whorl and continued upwards towards the spire. 3. XESTA PORCELLANICA, Sarasin. S.E. of Wiak I. Some specimens are of a uniform whitish coloration; others have a narrow reddish-brown band at the suture, which is continued to about the first half of the last whorl. 4. Cutoriris crrcumpata, Fér. Wiak I. 5. Cutoriris (ALBEersra) zonuLaTa, Fér, Wak I. 6. Papurna HERO, Smith. S.E. of Wiak I. Very large examples of this handsome species; the type is smaller, but not so small as some specimens that were collected on a former expedition by Mr. Pratt at Muswar I., Geelvink Bay; the species evidently varies greatly in size. 7. Pavurna TRocuiForMis, Preston. Wiak I. wo specimens, both of which have a somewhat higher spire than the type, but agree well with it in other respects. 8. Papuina suscosrata, n.sp. Pl. III, Figs. 12-14. Shell depressed trochoid, moderately solid, openly umbilicated to a width of about 4 mm., light brown with a rather broad band of darker brown encircling the last whorl, situated just above the middle and continued upwards for a short distance at the suture of the 78 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. penultimate whorl, the last two whorls have a whitish thread-like line at the suture, upper part of shell finely obliquely striated, on the lower two whorls the strize gradually become stronger until the last half-whorl has the appearance of being broadly but obtusely costate, the whole surface of the lower whorls is covered with a microscopic granulation ; whorls 53, slightly convex, the last rounded but showing some indications of a keel; aperture transversely oval, whitish within, the outer band showing through; peristome white, very oblique, broadly expanded and somewhat reflexed, margins joined by a thin transparent callus. Maj. diam. 36, alt. 22mm. Hab.—Wiak I. Allied to the Papuina labium-lituus-multisona-wallaceana-aurora group (all of which may prove to be but varying forms of one species), but our new species can be easily distinguished from all by its open umbilicus and the coarse oblique sculpture of the last whorl. The specimen selected for the type is of a light yellowish-brown with a rather broad dark-brown band at the periphery of the last whorl; but there are also specimens of a uniform dark brown without any band, and other examples have the last whorl dark brown, whilst the upper whorls exhibit a lighter-brown coloration. All have the characteristic open umbilicus and coarse sculpture. 9. Papurna mEpipa, n.sp. Pl. III, Figs. 9-11. Shell depressed trochiform, rather thin and transparent, openly umbilicated to width of about 3mm., of a very light yellowish-brown colour; whorls 5, distinctly convex, with very fine oblique striz or lines of growth, lower whorls covered with microscopic waved granules, last half-whorl is bluntly whilst the first half is sharply carinate, there is a spiral white thread at the suture of the penultimate which is continued half-way round last whorl, where it is covered by a narrow reddish-brown band which extends to the peristome; aperture transversely oval, whitish within; peristome expanded and slightly reflexed, flesh-coloured. Maj. diam. 29, alt. 17 mm. Hab.—Wiak I. Approaching but quite distinct from P. pseudolanceolata, Dtz., and P. callosa, Sykes, from both of which it is easily distinguished by its open umbilicus and much less angular peristome. EXPLANATION OF FIGURES ON PLATE III. Fics. 9-11. Papuina lepida, n.sp. 12-14. P. subcostata, n.sp. ON TWO EDITIONS OF DUMERIL’S ZOOLOGIE ANALYTIQUE. By Tom Inepatr. Read 14th April, 1916. I wave only seen one reference to this work, namely that in the Nautilus, vol. xv, p. 127, March, 1902, where Dr. W. H. Dall wrote as follows: ‘‘I have frequently called attention to the ill-effects of the absurd European proposition that names such as Cyprinus and Cyprina should not be allowed to exist in nomenclature simultaneously Finding the name Jassaria challenged on this ground, I hunted up the earlier use (1806) in Duméril’s Zoologie Analytique, and took the occasion to make a full list of Duméril’s names, which all end in -arius and are all synonyms. Some appear in the text, and others in the Latin index only, with references to the pages where the French equivalent is to be found. Among the latter I discovered Pleuro- tomarius, Duméril’s name for Pleurotoma. If the idiotic rule above- mentioned was put in force this superfluous synonym would deprive us of the right to use Plewrotomaria, J. Sowerby, which dates only from 1821, and perhaps also Plewrotomarium, Blainville, another rendering of Defrance’s French name which dates from 1825. I may add that any rule admitting anonymous names, taken into con- sideration with the above-mentioned one, would upset about half of the best-known names in mollusean zoology, including such as Oliva, Cyprea, ete.” The last sentence seems to have been written in a hurry, asCyprea is a Linnean 1758 name, and as far as I can judge absolutely unassailable, while I have no record of any danger to Oliva from either of the causes Dr. Dall has quoted. In the above-mentioned quotation Dall does not discuss the validity of Duméril’s names, but apparently accepts them as valid. Many of them were quoted in synonymy by the Adams Bros. in their Genera of Recent Mollusca. Scudder also records most, if not all, of the names. Consequently they have been available to workers for many years, and there is no new discovery here. It seems necessary to make this statement in view of the results hereafter given. Dall afterwards reconsidered the matter of rejecting Duméril’s nomen- clature as not acceptable, for in the U.S. Geol. Survey Prof. Paper No. 59, 1909, p. 46, in the synonymy of Zhais, Bolten, he wrote: ‘* Purpurarius, Duméril, Zool. Anal., p. 166, 1806: nomenclature not Linnean: Froriep’s German transl., p. 167 (P. persica cited), 1806.” I cannot accept the dictum that Duméril’s ‘‘nomenclature”’ is ‘‘ not Linnean”. This wonld certainly have been an easy solution to the problem, but unfortunately it is not maintained in other branches of Zoology. Thus, in Ornithology, the names proposed, when available, by Duméril are in use. I believe also that Ichthyologists utilize Duméril’s novelties without question. My own method of dealing with Duméril’s names would be to advise rejection whenever there is the slightest technical cause and to urge the strict letter of the law 80 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. against them, but where no cause can be shown for rejection to at once make use of them, and so rid ourselves of an annoying shadow in our nomenclature. The title of Duméril’s book is ‘‘Zoologie Analytique, | ou | Méthode Naturelle | de | Classification des Animaux, | rendue plus facile | a Vaide de tableaux synoptiques; | Par A . M. Constant Dumeéril, | Docteur en médecine, .. . | Parva sed apta. | Paris, | Allais, Libraire, Quai des Augustins, No. 39, | M,pccc,vr”’. The dedication to ‘‘ Monsieur de La Cépéde ” is dated ‘‘ Ecija, le 20 septembre, 1805”’’, the preface ‘‘Cordoune, le 17 septembre, 1805”’. In this preface Duméril, p. xxiii, wrote: ‘‘La classe des mollusques offrira des ordres tout-d-fait nouveaux; mais ils ont été faits ou indiqués, déja par M. Cuvier lui-méme, qui a le premier séparé ces étres de la classe nombreuse des vers de Linné. ‘lous les savans ont adopté maintenant cette classification ; et comme notre objet étoit de faire connoitre les animaux et non les coquilles qui les revétent, nous n’avons profité que dans trés-peu de circonstances des travaux de MM. Poli et Lamarck, cette partie de la science laissant encore beaucoup a desirer aux naturalistes.”’ The Cuvierian work referred to is designated on the previous page as the ‘‘ Tableau élémentaire de lHistoire naturelle des Animaux”’. I therefore conclude that the above can be considered as a direct bibliographical reference, basing my conclusion on the opinion (No. 39) given by the International Commission on Zoological Nomenclature, when dealing with a very similar case. his decision is not in accord with that given by Dr. Dall, already quoted, but in view of the complication hereafter exposed I suggest reconsideration, and moreover confidently anticipate agreement with the results advocated in this note. The complication consists of the German translation, which was quoted by Dall without comment, but which necessitates a recon- sideration of the whole matter. The title-page reads: ‘‘C. Duméril’s, | Doctors und Professors an der Medicinischen Schule | zu Paris, | Analytische Zoologie. | Ausdem Franzosischen, | Mit Zusitzen | von | L. F. Froriep, | Professor zu Halle. | Parva sed apta. | Weimar | Im Verlage des Landes-Industrie-Comptoirs | 1806.” Froriep’s ‘‘ Vorrede”’ is dated ‘‘ Halle am 18 Sept. 1806”, and in it he explains that as no examples are given in the original he has added to each genus-name a species cited from Gmelin’s edition of Linné’s Systema Nature. Let us now consider the original edition and its effect on the accepted nomenclature of Mollusca. The names collated by me as new are as follows :— p- 156. Argonautarius, new name for Argonauta, Cuv. Nautarius Nautilus, Cuv. p. 157, Sprrularius Spirula, Lam. p- 162. Patellarius Patella, Cuv. p. 164. Srgaretarius Sigaretus, Lam. Bullearius Bullea, Lam. Trochiarvus Trochus, Cuv. IREDALE: ON DUMERIL’S ZOOLOGIE ANALYTIQUE. 81 p. 164. Zurbinarius, new name for Zurbo, Cuv. Planorbarius Planorbis, Cuy. Naticarius Natica, Lam. Neritarius Nerita, Cuv. Monodontar ius Monodonta, Lam. Valvearius Valrata, Miller. Scalatarius Scalaria, Lam. p- 166. Conarvus Conus, Cuv. Cypriarvus Cyprea, Cuv. Olivarius Oliva, Cuv. Volutarius Voluta, Cuv. Nassarvus Nassa, Lam. Purpurarius Purpura, Brug. Buceinarvus Buceinum, Cuy. Terebrarius Terebra, Lam. Murieiarvus Murex, Cuv. Turbinellarius Turbinella, Lam. p. 168. Venusarius Venus, Cuv. Solenarius Solen, Cuv. Myarius Mya, Cuv. Ostracarius Ostrea, Cuv. In the Latin Index I find several which do not appear in the text save in the vernacular form, and these can only be linked up by the pagination ; such are: p-. 834. Colombellarius, new name for Columbella, Lam. p. 838. Marginellarius Marginella, Lam. p- 340. Pleurotomarius Pleurotoma, Lam. p- 840. Pholadiarius Pholas, Cuv. p- 385. Donaciarius Donax, Lam. p- 843. Zellinarius Tellina, Cuv. Teredarius Teredo, Cuv. p. 333. Cardiarius Cardium, Cuv. p- 386. Haliotidarius Halyotis, Cuv. p. 840. Pinnarius Pinna, Cuv. It will be just as well to cite an example of Duméril’s method, since it is not a common book. I quote part of Table No. 105 (p. 167). This covers his ‘‘ [[1¢ Famille. Siphonobranches ”’, and the diagnosis reads ‘‘ Mollusques gastéropodes testacés a deux tentacules, & coquille échancrée ou prolongée en un canal pour recevoir un siphon propre a la respiration”. Thirteen genera are admitted with vernacular names only, differential diagnoses being prepared. Thus the two main sections are ‘‘Opereule distincte’’? and ‘‘Opercule nulle”; the former is then subdivided thus: ‘‘ a yeux a la base des tentacules”’ and ‘‘a yeux non & la base des tentacules”’, and so on. On the opposite page (166) ‘‘ Notes sur le No. 105” are given, and equivalent to most of the vernacular names Latin ones are allotted in brackets, thus: ‘‘ Les nassiers (nassarius).” A few read as follows (p. 166): ‘‘ Les turbinelliers (turbinellarius) et les pleurotomiers ...” No equivalent is given to the last-named, but in the Index (p. 340) 82 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. the word ‘pleurotomarius’ appears and p. 166 is added. From Duméril’s usage it can be deduced that these are connected, but strictly speaking I would have regarded tle index names as nomina nuda, and objected to their active incorporation into molluscan nomenclature. Three bibliographical references are given by Duméril —first to Cuvier’s Zableau Hlém., second to Poli, and third to Lamarck. Consequently Duméril’s names all depend on these works. I therefore allot all I can first to Cuvier’s work, then to Poli’s, and lastly to Lamarck’s as synonyms. Cuvier’s names are simply those of Linné, so that Duméril’s names follow the Linnean ones and are absolute synonyms of those. None are referable as new to Poli, so that the only names that interest us are the emendations of the Lamarckian names. Most interest ‘centres around NaAssAnRius. This can only be determined as a new name for Wassa, Lamarck, 1799, non Bolten, 1798. ‘he type of Massa, Lam., is Buecinum mutabile, Linn. Recently Lamarck’s familiar name has been rejected, as it was antedated by Bolten’s usage in another con- nexion. As substitutes Now reference is given, since Martyn’s second volume had not been published at this date.¥ X Ne deehk Apectes owe PUL Fh wotkente F Walyn , IREDALE? SOLANDER AS A CONCHOLOGIST. 89 In this connexion may be noted that the Catalogue was published between the 8th and the 24th of April, 1786, and we do not know the exact date of publication of Martyn’s vol. ii, save 1786. ‘This suggests that if the Portland Catalogue’s valid names clashed with Martyn’s the former should have priority. I know of one case, Patella umbraculum, and I will use this name in preference to Martyn’s (Lepas) umbella, until such time as an exact date is known for the latter, when the matter may be reconsidered. The valid names are as follows :— Arca fusca, 8., p. 42, based on Gualt., 87 G. labiata, S., p. 185 D’ Avila, vol. i, pl. 18. nodulosa, S., p. 98 Gualt., 87 E. Argonauta hians, 8., p. 44 Rum., 18 B. navicula, p. 44 Rum., 18, 4. nodosa, S., p. 96 Rum,;. 18) 1: Bucceinum calcaratum, 8., p. 183 Gualt., 31 F. iris, S., p. 14 Martyn, vol. i, fig. 26. monodon, S., p. 17 Martyn, vol.i, fig. 10e. muricatum, p. 104 Favanne, 33, x. 3. pustulosum, S., p. 88 um: 49 B. taurinum, S., p. 142 Lister, 841, 69. testudo, S., p. 98 Seba, ili, 70, figs. 2,38, and 4 of the Buce. harpa, L. Bulla vesicaria, §., p. 1386 Seba, ili, tab. xxxviil, figs. 46, 48. sonata, S., p. 164 Born, Mus. ces., tab. ix, fig. 1. Cardium hystrix, S., p. 116 Gualt., 72 5. impressum, S., p. 155 Born, mus., tab. 11, figs. 15, 16. protrusum, S., p. 178 Lister, 319, 156. robustum, 8., p. 58 Lister, 328, 165. spinosum, S., p. 105 Favanne, 52, A 2. Chama lazarus, var. pannosus, op: 96 Rum., 48, 3. Conus araneosus, 8., p. 76 'Martyn, vol. 11, 676. architalassus, S., p. 189 Argenv. Suppl., tab. 1, fig. M.N., 18. augur, S., p. 44 Knorr, vi, tab. xiii, fig. 6. Juscatus, 8., p. 160 Martyn, vol. 11, fig. 693. leoninus, p. 72 Knorr, in; 12; 5. mappa, S., p. 116 Knorr, i, tab. viil, 4. nocturnus, S., p. 156 Martyn, vol. 11, 687, 688. pulcher, p. 179 Lister, 772. quereinus, S., p. 67 Martyn, vol. ii, 657. undulatus, S., p. 180 Gualt.,. 25 1. Cyprea pantherina, S., p. 50 Lister, 681, 28. pustulata, p. 106 Lister, 710, 62. Helix alba, p. 186 Lister, tab. xxxili, xxxii, and xlvi, Favanne, 63 E. erubescens, p. 187 Lister, 24, 22. ' It will be noted that Martini is commonly written Martyn. 90 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Helix insignita, p.176,basedon Lister, 67, 68. otis, p. 38 ovipara, p. 87 pieta, p. 182 undata, p. 177 vitellus, p. 26 Isognoma lignea, §., p. 9 rigida, S., p. 118 Lepas cornucopia, S., p. 101 Murex elongatus, p. 65 Jimbriatus, p. 106 plicatus, p. 104 tribulus, var. pecten, p. 188 Mya complanata, p. 100 gigas, S., p. 27 ovalis, p. 184 Mytilus castaneus, 8., p. 69 lingua, 8., p. 77 pictus, p. 158 Nautilus serobiculatus, S., p. 182 Ostrea purpurea, p. 139 Patella auricularia, p. 154 Sungoides, p. 55 gorgonica, p. 105 macroschisma, p. 71 mytiliformis, p. 42 oculus-hiret, p. 105 pulehra, p. 105 umbraculum, p. 178 Pinna rigida, §., p. 136 Serpula attrahens, p. 106 gigantea, p. 186 tortuosa, p. 184 Solen antiquatus, p. 101 pallidus, p. 42 plebeius, p. 42 rostratus, S., p. 160 Strombus fusus, var. persicus, p. 3 sinuatus, p. 189 tricornis, p. 5 truncatus, p. 150 Tellina cruentea, 8., p. 10 marginalis, S., p. 137 Trochus alveolatus, p. 52 onustus, p. 4 solaris, p. 86 Favanne, tab. Ixiu, fig. 11. ister, (23, 2); Rume;-22, 1; Lister, 76, Favanne, tab. lxiii, fig. G3. Rum., 22, 1. New name for Ostrea tsognomon, L. ister, 227. 62: D’Argenville, 26 D. Favanne, pl. lxxix H. Martyn, vol. i, fig. 6¢. Favanne, tab. lxxix, I. Rum., 26, 3. Lister, 150, 5. Lister, conch. 414 ; 414, 258. Lister, 146, 1. Lister, 1055, 9. New name for Patella unguis, L. = Humph. Conch., pl. 1, fig. 2. Knorr, iv, tab. xv, fig. 5. Lister, 552, 4°- Knorrjav, 22) ie Born, Mus. ces., tab. vi, figs. 11,12. Rumph., 40 N. Humph. Conch., pl. iv, fig. 16. Humph. Conch., 3, 8. Humph. Conch., pl. vii, fig. 3, Humph. Conch., pl. 111, fig. 9. Humph. Conch., pl. ii, 6. Humph. Conch., pl. i, 8. Humph. Conch., pl. v, fig. 5. Knorr, 01,26, 1: Humph. Conch., pl. vii, fig. 15. Seba, 111, 94; the largest figure. Humph. Conch., pl. u, fig. 4. Pennant, 46, 25. Lister, Conch., t. 412 inferior. Lister, 421, fig. 265. Valentyn, Bivalves, No. 5. 9 Vv. Lister, 854, 12. Seba, iii, pl. lxui, fig. 3; Favanne, 22, 2. Martin, 848, 45 ; Lister, 873. DP Avila, vol: 1, tab: xr. Kirorr; vi, 12,41.. Lister, 387. Lister, 62, 60. Favanne, tab. xii, C. 1, 2. Martyn, vol. i, fig. 30, 9. IREDALE: SOLANDER AS A CONCHOLOGIST. 91 Trochus sulcatus, p.113, based on Naturforscher, vol. ix, tabs. 11, figs. tectus, p. 187 Turbo cornutus, p. 147 Venus arctica, 8., p. 138 nimbosa, p. 175 Voluta amphora, 8., p. 30 ancilla, S., p. 84 angulata, S., p. 76 anguria, S., p. 64 arausiaca, S., p. 26 cithara, S., p. 96 elongata, p. 30 filosa, S., p. 76 gravis, 8., p. 108 haustrum, S., p. 187 emperialis, S., p. 188 incompta, S., p. 96 incrassata, S., p. 13 melo, S., p. 41 muricata, S., p. 142 nobilis, S., p. 6 pepo, S., p. 87 ponderosa, S., p. 25 scafa, 8., p. 41 virescens, S., p. 26 5, 6; Martyn, vol. 1, fig. 337. Lister, 628, 14. DD Avila, volkan pl. v, fig. 1. Lister, 426, 267. Favanne, pl. xlix, fig. I, 1. Martyn, 780. D’ Avila’s Cat., vol. 1, pl. vin, fig. 5. Martyn, vol. iv, 1328. Martyn, vol. 111, 767. Rumph., 37, 2. Seba, Mus., vol. iii, t. lxv, figs. 1, 2. Martyn, vol. i, fig. 25n. Martyn, vol. 1, fig. 22/. Martyn, vol. iii, 917. Martyn, vol. ii, 781. Martyn, vol. iii, 934, 935. Martyn, vol. i, fig. 192. Martyn, 499, 500. Martyn, vol. iii, 772, 773. Lister, 810, 19. Lister, 799, 6; p. 183, adds Martyn, vol. 11, 774. Martyn, vol. iii, figs. 768-70. Martyn, 916. Adans., Seneg., 3, 2. Martyn, 932, 933. I had hoped to have given the exact status of each of the above names, but my ignorance of general conchology has compelled me to forego that idea. I believe, however, that the preceding list will prove useful, and here add a few notes whereby the work of my eritics may be lessened. Page 186, lot 3964, reads: ‘‘ A very fine specimen of the Concho- Lepas, or Cockle Limpet. Humph. Conch. page 12, No. 7, plate 4, fig. 9, which was taken from the shell. See also Favanne, pl. 4, fig. H. 2, from the Straits of Magellan.” I note that the following Solander names are invalid through earlier usage of the same combination, mayhap in some cases in the same connexion. ‘The necessary data can be easily recovered in each instance from the same source as I have consulted, viz. Sherborn’s Index Animalium. Such are Serpula gigantea, Buceinum monodon, Trochus solaris, Arca nodulosa, Voluta muricata, Mytilus pictus, Helix picta, and H. plicata. A second series of invalid names are those proposed for the shells figured by Martyn in the first volume of the Universal Conchologist. These are Buccinum iris, Voluta elongata, V. filosa, Trochus solaris, V. incompta, Murex fimbriatus, and T. sulcatus. I have compiled from Sherborn’s Jndex a third list of names, these being generally referred to a later worker. The latter need investigation, though in some instances probably they refer to the same species, viz.: Arca 92 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Jusca, Brug., 1789; Conus araneosus, Brug., 1792; C. augur, Brug., 1792; OC. leoninus, Gmelin, 1791; C. nocturnus, Brug., 1792; C. quercinus, Brug., 1792; C. sulcatus, Brug., 1792; Cymbium melo, Bolten, 1798; Cyprea nebulosa, Gmelin, 1791; Helix undata, Gmelin, 1791; Murex plicatus, Gmelin, 1791; Mya ovalis, Pulteney, 1799; Patella mytiliformis, Gmelin, 1791; Solen antiquatus, Pulteney, 1799; TZrochus tectus, Gmelin, 1791; Zurbo cornutus, Gmelin, 1791; Voluta arausiaca, Shaw, 1790; and V. seapha, Gmelin, 1791. Most, if not all, of these Solander names are quoted by Dillwyn in his synonymy, but I have refrained from citing Dillwyn’s equivalents as it is commonly known that these may not be exact, and I might only cause confusion. Thus Area fusca of Solander is cited as a synonym of Arca imbricata, Bruguiere, over which it has priority, while it invalidates the later Arca fusca, Bruguiére. The exact determination of the correct names of the two species concerned would need special knowledge, for E. A. Smith has shown that Lamy’s synonymy of these complex bivalves is open to correction. Srromsus Livipus, Linné. Hedley, in the Proe. Linn. Soc. N.S.W., 1909, vol. xxxiv, p. 453, used Drillia livida ex Gmelin, explaining: ‘‘In the absence of a figure and a type, the Linnean Strombus lividus is, according to Hanley, unrecognizable. Under these circumstances it is better to adopt the name of Gmelin, securely based on the figure of Chemnitz (Conch. Cab., ix, 1786, pl. 186, f. 1269-70), than to use Lamarck’s aurieulifera.” I have made it a rule never to accept second-hand determinations, so that to me Linné’s species being indeterminable Gmelin’s inter- pretation did not systematically concern me, save as a synonym. For the shell figured by Chemnitz, Bolten (prior to Lamarck) had proposed two names, viz., (Mus. Boltenianum, p. 100) S| ¢rombus | canalicularis, and (p. 124) 7[urris] St. Stephani. I should therefore have preferred the safe method of nomination and called the shell “ Drillia”’ canalicularis (Bolten). The sequel appears in the present publication, as on p. 91 we read, ‘‘ A pair of large and fine Strombus lividus, L., from Guinea, Lister, 121, 17, rare.’ Here we have a definite and earlier attempt to fix the Linnean species, and, moreover, one more valuable than Gmelin’s, as Solander was a personal pupil of Linné and more likely to know the Linnean shell. I cite this as of interest in confirming my proposed usage of the Boltenian species-name, and not as an incentive to use Solander’s acceptance of the Linnean name. I have cited ‘‘ Driilia”’ as I do not consider this genus-name in any way satisfactory. It is restricted to the species D. umbilicata, Gray, fixed as type in 1847, and I cannot trace any knowledge of the animal of this apparently aberrant species. It belongs to the west coast of Africa, where also Clavatula typical is found, and the shell characters of this genus, as commonly utilized, approach so closely that it is difficult to separate these genera. I do not believe the Pacific ‘‘ Drillia”’, especially the smaller species, are closely related. IREDALE: SOLANDER AS A CONCHOLOGIST. 93. Cyprm#a umBiticata, Solander. On p. 65 ‘* Lot 1471, Cyprea umbilicata, 8., Coromandel” occurs. Here it is a nomen nudum. Dillwyn, in his Index Hist. Conch. List., 1823, p. 32, gives a note identifying List., 667, fig. 12, thus: ‘‘ This shell has been arranged as a variety of Cyprea Pyrum, and as a separate species in Solander’s MS. with the name of Cyprea umbilicata; it has the teeth of a saffron colour, and in Cyprea Pyrum they are whitish.’ This quotation validates Cyprea umbilicata as of Dillwyn, 1823, and invalidates Cyprea umbilicata of Sowerby, 1825. Recently Verco has given a good history of the latter species, and now his varietal name armeniaca will become the species-name, while the typical form will need renomination. In order to draw attention to this matter I propose to rename C. umbilicata, Sowerby, and to eall it CYPR#A HESITATA. [P.S.—Murex fimbriatus of Solander (ante, p. 90) unfortunately invalidates Murex fimbriatus of Lamarck, 1822, which has just recently been rehabilitated, after ninety years, by C. Hedley (Proce. Linn. Soc. New 8. Wales, vol. xxxvili, 1913, p. 328). |] 94 MISNAMED TASMANIAN CHITONS. By Tom Inrpatr and W. L. May. Read 12th May, 1916. PLATES IV AND YV. SUMMARY. Status of Chiton inquinatus, Reeve. Eudoxoplax, gen. nov. for Chiton inornatus, Ten.- Woods, Plaxiphora, spp. Acanthochiton, spp. Cryptoplax, spp. Ischnochiton, spp. Recognition of Chiton longieymba, Blainville. Heterozsona subviridis, n.sp. Chiton contractus, Reeve, is Ischnochiton decussatus, auctt. Recognition of Chiton lineolatus, Blainville, as contractus, auct. Ischnochiton (Anisoradsia, n.subg.) marlet, n.sp. Chiton divergens, Reeve, is a synonym of J. fruticosus (Gould). Chiton proteus, Reeve, is the correct name for Z. divergens, auct. Ischnochiton milligant, n.sp. Ischnochiton atkinsont, n.sp. Chiton ustulatus, Reeve, is not Ischnochiton ustulatus, auct. Ischnochiton torri, n.sp. = J. ustulatus, auct. Ischnoradsia evanida (Sowerby) is not a synonym of J. australis, but is the name for East Tasmanian form. Chiton cimolius, Reeve, is distinct from Chiton volvox, Reeve, and is probably equal to Zorvea duniana, Hull. Callistochiton mawlet, n sp. Sypharochiton maugeanus, n.sp. Rhyssoplax diaphora, n.sp. I. Hisrortcat Notes. It seems meet to anticipate the systematic correction of some misnamed Tasmanian Chitons with a few notes which may appear outside the scope of our title, but which nevertheless are the direct results of research conducted with the above sole aim. The earliest collectors of Tasmanian Chitons appear to have been the famous French naturalists Péron and Lesueur. In 1802 the Géographe called at southern Tasmania, and Péron records that he met with wonderful shells on Maria Island. Our friend Mr. Chas, Hedley has sympathetically related (Proc. Linn. Soc. N.S. Wales, vol. xxxix, 1915, p. 727) how a comrade, Mauge, perhaps even keener than the two above-named naturalists, passed away through an effort to participate in the spoils, and was buried on the island. We have no record of any Chitons preserved from this particular locality, but it may be that Mauge’s eyes feasted upon the species with which we associate his name. The following year the Géographe returned from Port Jackson and stayed at King Island, Bass’ Straits, where a large collection of shells was made. IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 95 Péron was now the conchologist of the trip, but unfortunately, though he survived to reach Paris with his treasures, science was deprived of his personal experiences and knowledge by his early decease. Lesueur was primarily the artist, and though he edited his friend’s journal he did not attempt to deal with this collection, which was deposited in the Paris Museum. Blainville, however, in the preparation of the pioneer monograph of this group published in the Dict. Sci. Nat., vol. xxxvi, 1824, made good use of the material, and many species were described as collected by Péron and Lesueur from various Australian localities. The only definite citations are from King Island and King George’s Sound, but unfortunately, through accidents, Péron’s collections had suffered so that incorrect data were frequently ascribed to the specimens, and the correction of such errors has been made with great difficulty, as hereafter shown. Quoy and Gaimard, twenty years after Péron and Lesueur, collected in southern Tasmania, and their great interest in this group is manifested in their beautiful plates and lucid descriptions. The earliest British visitor who was a collector of Chitons appears to have been Dr. Sinclair, R.N., but his discoveries are peculiarly perplexing, since his shells also appear to have been mixed and we have had a great deal of trouble in clearing these up. ‘Thus, in Dieffenbach’s Travels in New Zealand, vol. ii, 1843, Gray described some New Zealand forms and enumerated the New Zealand molluscs. On p. 245 he recorded :— Acanthopleura undulatus; Chiton undulatus, Q. & G., New Zealand, Van Diemen’s Land, Dr. Sinclair, R.N., and p. 262 :— Acanthochetes hookeri, u.sp., New Zealand, Van Diemen’s Land, Dr. Sinclair, R.N. A few years later Reeve in the Conch. Icon., section Chiton, included the following species as collected by Dr. Sinclair in Van Diemen’s Land, viz.: Chiton sinclairi, Mus. Cuming, C. inguinatus, Mus. Brit., and C. carinulatus, Mus. Brit. None of these records is reliable. The first three are undoubtedly Neozelanic, the fourth is probably so, and the last may be West American. Reeve at the same time described Chitonellus gunnii from specimens forwarded by Roland Gunn, which appears to be the only contribution made to our study by that famous Tasmanian naturalist. Joseph Milligan’s name is known in this connexion through the record of some species from Flinders Island by E. A. Smith in 1884. The true facts have never been published, but it would seem that we must consider Milligan to be the first native Chiton enthusiast, for reterence to the British Museum Registers and collections shows the following items: In the year 1850 Joseph Milligan presented to that institution a series of Tasmanian shells, including Chitons collected on Flinders Island, Bass’ Straits. The Chitons were forty-seven in number, separated by Milligan into nineteen lots. This series has been traced in the British Museum, and we find it covers the 96 FPROCERDINGS OF THE MALACOLOGICAL SOCIETY, majority of the forms recently collected by one of us on the Furneaux Group. Thus, ave note “Jschnochiton ecrispus, ustulatus, contractus, deeussatus, cariosus, maytt, australis, novehollandia, Cryptoplaxe gunnii, Notoplax speciosa, Acanthochiton asbestotdes, and Loriea volvo”. We have quoted these names as being in use, but we show many to be incorrect hereafter. The collection was simply placed in the drawers in the British Museum without study, but thirty-four years afterwards E. A. Smith recorded a couple of species and described one new one from Milligan’s gift. One of us recorded only three years ago, and sixty-three years after Milligan’s discoveries, three of the above-named species as new to Tasmania, This tardy recognition of Milligan’s suecess in Chiton-collecting is noteworthy, since we can now accept this worker as our earliest local predecessor, The earliest list we recollect is that of Tenison-Woods in 1877, when eleven species were included, but Woods conservatively estimated this as far too many. We wonder how he would greet our fifty to sixty species and suggestions of many more. We have not with certainty determined the modern equivalents of his eleven names, Tate and May in 1901, mainly from collections made by the latter, were enabled to recognize twenty-four species, but these included some doubtful forms. Torr, the most diligent Chiton collector in Australasia, explored the north-west coast, and as a result a new list was drawn up. This was published in the “ Papers and Proe. Roy. Soc. Tasm.”’ for 1912, pp. 25-40, by May and Torr, as follows :— Lepidopleurus inquinaius (Reeve). Dredged 15 f. and 9 f., South-east Coast. matthewstanus, Bednall. One specimen, North-west Coast. columnarius, Hedley & May. One specimen, 100 f., South Coast. Callochiton platessa (Gould). North Coast. mayt, Torr. North Coast. tnornatus (‘Ten.-Woods). North Coast, Ischnochiton crispus (Reeve). Universal. @ivergens (Reeve). North Coast. contractus (Reeve). North Coast. eartosus, Pilsbry. North Coast. smaragdinus (Angas). North and East Coast. maywt, Pilsbry. South Coast. australis (Sowerby). East Coast. novehollandia (Reeve). North-west Coast. Callistochiton antiguus (Reeve). North Coast. Plaxiphora costata (Blainville). Universal. aldida (Blainville). Universal. matthewst, Iredale. North-west and East Coasts. Acanthochites asbestoides (Smith). Universal. variabilis (Adams & Angas). North-west Coast. bednalli, Pilsbry. Universal. sp. Five valves, 100 f. off Cape Pillar. IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 97 Acanthochites speciosus (H.Adams). Dredged 9f., South-east Coast. lachrymosus, May & ‘Torr. South-east Geek: Cryptoplax striatus, var. gunnit, Kast and North-west Coasts. Reeve. Chiton gugosus, Gould. North-west, South, and East Coasts. pellis-serpentis, Quoy &Gaimard, Universal. tricostalis, Pilsbry. North Coast. quoyt, Deshayes. South-east Coast. calliozona, Pilsbry. One valve only. Loricella angasi (Adams & Angas). North-west Coast. Liolophura gaimardi, Blainville. Recorded but doubtful. The following species admitted in the Revised Census in 1901 were rejected, as not rediscovered or authenticated :— Ischnochiton fruticosus (Gould), |New South Wales. carinulatus (Reeve). Described from ‘ Tasmania ”’ tateanus, Bednall, South Australia. Acanthochites granostriatus, Pilsbry. = A. bednall, Pilsbry. costatus, Adams & Angas. An investigation of the Furneaux Group enabled one of us to add some more species, whilst also other shells found there incited a redetermination of some species, and these specimens were forwarded to England for comparison with the British Museum types, hence the present paper. ‘The species added were (Victorian Naturalist, vol. xxx, 1918, p. 59) Ischnochiton sulcatus (Quoy and Gaimard) = decussatus (Reeve), I. ustulatus (Reeve), and Lorica volvox (Reeve) ; and the doubtful species were Jschnochiton cariosus, Pilsbry, and J. contractus (Reeve). Continued interest through the publication of these accounts resulted in further discoveries, and in the ‘‘ Papers and Proceedings Royal Society of ''asmania”’, 1915, pp. 78-9 and 81-2, May added Chiton oruktus, revel C. aureomaculatus, Bednall & Matthews, - Acanthochiton kimberi, ' Yorr, and A. rubrostratus, Torr, all from the south-east coast, and extended the range to the south-east coasts of Lorica volvox (Reeve), Callochiton inornatus (Ten.-Woods), C. mayt, Torr, Acanthochites variabilis, Adams & Angas, and Callistochiton antiquus (Reeve). This made up a total of thirty-nine species, but the collections now studied by us show at least sixty species. We here record our thanks to a recent and most energetic field naturalist, our friend Mr. Ernest Mawle, of Port Arthur, who has submitted and presented to us splendid specimens of many species which are worthy of special note for their perfect preservation and large size. We have attached his name to two magnificent new species as a mark of our appreciation of his good work, and note that we have other new discoveries made by him now before us and anticipate many more. It is Pye difficult to fully express our thanks to our friend Dr. W. G. Torr for his generosity in presenting us with so many Tasmanian forms, the results of much labour in collection, and, 98 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. further, Iredale desires to place on record at this, the earliest, opportunity, his gratitude to Dr. Torr for the gift of an unequalled and complete series of South Australian shells, whereby definiteness has been gained in connexion with typical Adelaidean forms. We have continually referred to Torr’s papers, and, though the nomen- clature needs revision, these mark an epoch in the study of Australian Chitons, being based on personal experience, whilst his field notes are very valuable. The types of the new species will be presented to the Tasmanian Museum, Hobart. These are undissected shells which have been figured as such; detail figures will be later given from dissected paratypes. If. Sysrematic Nores. We preface our corrections and descriptions of new species with a few words of explanation and warning. The list given above needs extensive revision, and we have to point out one general reason. Many species were described by Reeve from the Cuming Collection and British Museum. Reeve only described and figured one specimen of each species, and very fortunately his artist painted the shell carefully. We are thus able to trace the individual which must be regarded as the type. When Pilsbry prepared his monograph he was dependent upon Carpenter’s MS. notes on these shells, and Carpenter did not differentiate this figured shell. The only worker who has since determined Australian shells by direct comparison with the British Museum material also overlooked this item, which now proves important. One of us has endeavoured to fix these figured shells, and hereafter we record some results, but we would note that complications may yet occur. The word of warning is in connexion with the description of new species from unique examples of which we do not as yet know the variation and evolution through their growth stages. Hence, while geographically species can be easily named and thus variation gauged, it is impossible to apply the knowledge so gained from one species to another case even in the same genus. The growth of sculpture and development of girdle-scales need careful investigation, for we find that the young of some species of Jschnochiton differ in both these items from the adult and senile phases. We have now before us almost twenty different species represented by a few specimens; most of these are very distinct, but we withhold descriptions until possessed of more material that will illustrate the growth stages. Itisalso necessary to use the microscope in connexion with each specimen, though we have found it an infallible law that the strange appearance of a shell is the first attraction, and that in no case are species so alike that no superficial difference is apparent at first sight. 1. Curron rneurnatus, Reeve. This species was described from ‘‘ Van Dieman’s Land; Dr. Sinclair ’’. In 1896 Sykes dissected one of the type-specimens and found it to be a Lepidopleurus, and recorded the species from Victoria, while IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 99 simultaneously Pilsbry and Suter added New Zealand as an additional locality, and Bednall extended the range to South Australia. In 1910 May recorded it as dredged in 9 fathoms off Pilot Station, River Derwent, and in 1912 May and Torr added ‘‘ large specimens dredged, fifteen fathoms in Geographe Strait, East Coast’’, observing ‘“ No specimen, to our knowledge, has been taken near the shore” Re-examination of these dredged specimens in conjunction with the type series necessitated a consideration of Neozelanic and South Australian shells. Untortunately we have not been able to criticize Victorian examples, but we have the following facts to record. The type set are obviously ‘‘shore shells’? and agree better with New Zealand specimens than with any other, but here again no certainty is possible, since they do not exactly agree, and, moreover, we have two species collected on the New Zealand httoral; we have not seen the dredged New Zealand specimens attributed to this species. We particularly note this because we have two series from Tasmania, both dredged, and these represent two species, both ditferent from the types of inguinatus. ‘l'orr has also sent us two different species from South Australia, which seem to agree with the Tasmanian forms or to differ very slightly from them, we have not sufficient material to determine which. However, all those we have yet examined seem to fall into Parachiton, since the girdle appears to be covered with slender glassy spikes, whilst enguinatus and the Neozelanic shore shells have the girdle covered with small scales. There may be a rare shore shell in Tasmania which will bear the name inqguinatus, and there may be a shore shell in South Australia which may bear the name J/iratus, as the description given refers to a shore shell which seems to be a Lepidopleurus, but we have not yet traced the type. 2. Evupoxorpnax, gen. nov. This name is proposed for Chiton inornatus, Tenison - Woods. Pilsbry, in his Monograph, took up a manuscript description, made by Carpenter of a shell in the British Museum, under the name Callochiton lobatus, placing it in the subgenus Sfereochiton from Carpenter’s note, ‘‘ Girdle leathery, smooth, under a lens seen to bear short minute sparsely placed hairlets.’”” Later Pilsbry recognized this species was Tenison- Wood’s species above-named, and still later sinking Stereochiton as a synonym of Zrachyradsia, noted the species as Callochiton ( Trachyradsia) inornatus, ‘len.- Woods. Recent acquisitions of many specimens show the Tasmanian shell to reach a large size, and to differ appreciably from Callochiton and approach very closely to Hudoxochiton. It differs from the latter in the very wide leathery girdle with very short thin curved few and minute little hairs, and may later be regarded as a subgenus of Eudoxochiton. 3. PLaxrPHorA IN AUSTRALIA. Under this heading one of us gave (Proce. Malac. Soc. Lond., vol. ix, June, 1910, pp. 96-100) the results of the examination of a number of specimens, concluding as follows :— 100 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Plaxiphora costata (Blainville). Specimens from Queensland, Tasmania, and South Australia. Plaxiphora albida (Blainville). New South Wales, Victoria, South Australia, and ‘l’asmania. Plaxiphora peteliana, Thiele. New South Wales. Plaxiphora matthewsi, Iredale. South Australia. It was obvious from that paper that no definite result had been achieved, and other workers found great difficulty in accepting these conclusions. ‘he writer was just as dissatisfied, and later recorded that he was still working on the matter. Herein is presented a reason for reconsidering the whole subject, but material is demanded. It has been abundantly proved by the large collections now available that all Chitons are very local in their distribution, and this suggests the criticism of series from definite localities. With such series field notes should be considered and the variation established. Thus ‘‘ Tasmania”? is of little use as a locality when we know the northern shells may differ from the southern, and from the south alone we seem to have three distinct species, not counting matthewst, Iredale, which is not a Plaxiphora, strictly speaking, at all. Tasmanian shells have been twice named, thus: P. albida (Blain- ville), King Island; P. tasmanica, Thiele, new name for Chiton glaucus, Quoy & Gaimard, from southern ‘Tasmania. We have not yet examined actual topotypes, but Thiele has given figures of the type of the first-named, and good figures were given by Quoy & Gaimard as well as by Thiele of the other. As previously stated, it is hoped to settle this matter in detail later, but we call attention to it in the hopes of obtaining further co-operation, many more specimens being necessary. Thus Torr has sent us shells from St. Francis Island which he has ealled costata, publishing a note, ‘““Mr. Gatliffe, of Victoria, identifies this shell with P. bednalli, Thiele.””? We are inclined to agree with Gatliff, and the shells are certainly not costata (Blainville). Torr also sent us a topotype of the latter, and it seems distinct from the South Australian shell we had so identified. Further, South Australian shells do not seem to agree with Tasmanian shells determined as albida (Blainville), so that probably the former will bear the name of conspersa, Adams & Angas. A further complication exists in Plaxiphora peteliana, Thiele. This was described as from ‘‘'lasmania’’, and Iredale, probably wrongly so determined a New South Wales species. The items calling for urgent solution are: Does P. albida (Blainville) exist in South Australia, and, if so, is P. conspersa, Adams & Angas, synonymous? Does P. costata (Blainville) range into South Australia and Tasmania, or is it represented by different forms? Does P. bednalli, Thiele, range into West Australia, and, if so, is not P. hedley?, Torr, the immature shell, and also is not this the form recorded as P. albida(Blainville) by Thiele ? Again, does P. bednall, Thiele, range into 'l'asmania or is it there represented by a closely allied form? ‘These questions can only be answered by the study of systematically made collections of numbers with field notes. This is necessary, as it is quite impossible to gauge the merits of the cases by IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 101 means of a few shells only. P. matthewsi, Iredale, is not involved in the above medley, and we think one of the other species would quickly be eliminated were collections available. We have taken the oppor- tunity of figuring P. matthewsi, Iredale, from a Tasmanian specimen so determined (Pl. V, Fig. 4). When it was described the peculiar formation of the tail-valve which suggested Frembleya was remarked upon. Receipt of well-preserved specimens from Tasmania show that the species has no close relationship with Frembleya, the animal being obviously different. This is now being investigated, but in the meanwhile a nearer ally from a superficial examination might be Loricella. This statement should prove how extremely interesting this species is, and we hope that its exact status will be soon fixed. The valve slitting recalls that of Callistochiton, and we note hereafter that Thiele asscciated Lorica, Loricella, Squamophora, and Callistochiton together. We discuss the association later, but believe most of the resemblances of this species are simply due to convergence in develop- ment, and are not of phylogenetic import. 4. AcANTHOCHITONS, Torr, in his essay on South Australian Polyplacophora, observed, ““A splendid opportunity awaits the student who will make this field a special study,” and recorded sixteen species. We confirm Torr’s statement, and asan aid give the following notes. First, it is now necessary for the student to collect in quantity, as we find the species difficult to delimit without long series. It will be necessary to continually use the microscope, and very many specimens must be dissected. The difficulty of distinguishing these Chitons may be lessened by the usage of narrow generic groupings. Thus one of us advocated the usage of six generic names, viz. : Acanthochitona, Cryptoconchus, Cryptoplax, Notoplax, Macandrellus, and Craspedochiton. This was after consideration of Thiele’s classification, which was based on examination of the radula as well as microscopic shell-characters, and which reads :— “Genus Craspedochiton and subgenus Thaumastochiton. Genus Aristochiton. Genus Cryptoconchus with subgenus Spongiochiton and sections Leptoplax and Notoplax. Genus Acanthochites.”’ If this be accepted the following alterations are necessary on nomenclatural grounds alone. Firstly, regarding the genus Crypto- conchus with subgenus NVotoplar and sections Leptoplax and Macandrelius. Notoplax is older than Macandrellus, which equals Spongiochiton and Loboplax. We, however, would prefer Iredale’s arrangement with the amendment that J/acandrellus may fall as an absolute synonym of Notoplax. We have Tasmanian species which completely combine any superficial differences apparent in the types of the two generic groups. We would note, however, that Thiele referred the Neozelanic species “ rubiginosus, Hutton” to Loboplax = VOL. XII.—NOV. 1916. 8 102 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY Macandrellus, whereas, superficially, it seemed typically a Craspedo- chiton. Again, Thiele placed the Australian variabilis in Loboplax, but we hoe no hesitation in disagreeing with this point. This species (there may, however, be more than one confused under the name) is of the “ereatest interest because it cannot be closely correlated with any other Australian shell. More study than we have yet given to it is necessary to determine the correct location of the shell, and the animal must be carefully examined. Again, 1t must be admitted that probably more than one generic form is confused under the name Acanthochiton, even as restricted above, since the ~“bednalli”’? group seems somewhat different to the ‘ asbestordes”’ group. ‘These may, however, prove to stand in the same relationship to each other as typical Wotoplax does to typical Loboplax. As one of us admitted before, this is the most difficult group in the order to satisfactorily determine, and we want much more material to work upon. 5. CrYPTopLax. Reeve described Chitonellus gunnit from Bass’ Straits, Tasmania, but Pilsbry, in his Monograph, considered it a variety of striatus, Lamarck, even as EK. A. Smith had concluded some years previously. Consequently Bednall so recorded the South Australian shells. Torr recently reverted to the name striatus, remarking: ‘‘ Chitonedlus striatus of Lamarck describes our South Australian species admirably... The breadth of the valves varies so much in stratus that there seems no room for var. gunnit.”” Previously, May and Torr had catalogued the Tasmanian shells as Cryptoplax striatus (Lamk.), var. gunnii. Probably Torr had overlooked an article by Pilsbry in the Proc. Malac. Soc., vol. iv, pp. 151 et seqq., March, 1901, entitled “ Morphological and descriptive notes on the genus Cryptoplax”’, wherein Pilsbry clearly differentiated specifically Cryptoplaz gunnii, Reeve, from Cryptoplax striatus, Lamarck. In this paper Pilsbry used spirit specimens sent by Bednall from St. Vincent’s Gulf, South Australia, giving a description on p. 156 and figures on pl. xv, figs. 17-19, 24-6, to be contrasted with figs. 20-3 drawn from Port Jackson specimens of C. striatus, Lamarck. British Museum specimens confirmed Pilsbry’s conclusion, and North Tasmanian shells generally agreed. ‘The first Port Arthur (South Tasmania) specimen attracted attention as differing from the typical gunniz in being even more elongate. Mr. E. Mawle has since collected more Port Arthur specimens, and these indicate the solution of Torr’s perplexity, since two very distinct species are living together in that locality. We had observed some differences in othes collections, but were not certain of the exact source of the shells. Mawle’s collection has placed us upon sure ground, and the additional material we are now obtaining will enable us to deal with this matter later in more detail. In the meanwhile we can state that the two Port Arthur species are quite different superficially and in detail, and that we suggest one is the southern representative of “ striatus”’, while the other IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 103 represents gunniz. This conclusion necessitates the redetermination of South Australian shells and also West Australian ones. Torr has sent a few South Australian shells, and here again two very distinct species are confused, and it may even prove that more may be recognized. The exact application of the name striatus is not yet certain, for we have not ascertained the existence of the type, and the description is very inadequate and no exact locality is given, though Péron and Lesueur are cited as the collectors; this fact suggests King Island. 6. IscHNnocuHrrons. Tasmania appears to be very rich in species referred to Lschnochiton, s.l., but the south has developed a most wonderful fauna of large species, while the north has many Adelaidean forms. ‘Torr recorded twenty species of Zschnochiton from South Australia, and the majority of these may yet be found in northern Tasmania. Pilsbry, when dealing with Port Jackson Chitons, admitted five subgenera, viz. Ischnochiton, s.s., Heterozona, Stenochiton, Haploplax, and Ischnoradsia. Thiele was more conservative still, for, dismissing Zaploplax altogether, he only regarded Stenochiton, Heterozona, and Isehnoradsia as sections of the subgenus Lschnochiton. Stenochiton and Ischnoradsia are super- ficially so different that generic segregation isdemanded. The general form of Haploplax differentiates this group, and the girdle-scales being very different from those of /schnochiton we consider the name should have generic rank. However, we would record that neither mayit nor virgatus have any place in the group. Adult Leterozona is a very characteristic shell in the peculiar girdle-scaling, and we propose to use this name generically for somewhat novel reasons. Firstly, the immature Heterozona cariosa has the girdle-scaling normal, the scales being regular but smaller on the outer half of the girdle. This is the regular girdle-scale formation in such a species as fruticosus, Gould, and to some extent in the species known as “contractus”’ (recte Uineolatus, Blainville). In the species known as ‘“divergens”’ (recte proteus, Reeve) and crispus, Reeve, the scales are practically uniform in size to the edge of the girdle. Therefore, if Heterozona were to be enlarged, it might reasonably include such Shells as fruticosus, Gould. While we do not take this step at this time we use Heterozona generically, as we describe a new species from southern Tasmania which is the most highly developed of the group yet known. In this the peculiar girdle covering is developed at an early age, and is most noticeable at the first glance. We would thus make use of Pilsbry’s five subgenera as genera, and if these are utilized closer examination of shells becomes necessary and fewer mistakes will be made. Again, we must note that long series are necessary, as the very immature of many Ischnochitons are quite alike in form, lack of sculpture, and girdle-scaling. Further, the girdle- scales of juvenile specimens appreciably differ from those of the adult, even when the latter are not referable to Heterozona. Since the preceding was written we have been surprised by the dissections of the new species J. mawlei. A peculiar and beautiful 104 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Ischnochiton with extraordinary lateral sculpture was all it impressed us as. The girdle-scales were certainly slightly abnormal, in that they were more regular than those of ‘‘ contractus”’ auctt., with little or no leaning to the fruticosus style. We found, however, that all the median valves had two, three, or four slits, instead of the single one anticipated by us. Consequently it fell into Pilsbry’s subgenus Ischnoradsia, which in no other item did it resemble. While this proved the inadvisability of accepting Pilsbry’s differential features it did not relieve us from our dilemma. We purpose having the animal investigated and will then decide as to its exact status. - In the mean- while, to fix the peculiar systematic position of the species we provide for it the new subgeneric term ANISORADSIA. When Hull described Jschnochiton faleatus he recorded that he had received the same species from one of us under the name J. tateanus, concluding that an error had been made by Tate & May in 1901 when they included the latter species in the Revised Census. Confusion occurred through this note, and consequently netther species appeared in May & Torr’s List, whereas the fact is that both species or their representatives do occur, and were dredged together. Further, either I. faleatus or a nearly allied shell also occurs in South Australian waters. The Tasmanian and South Australian shells known as I. crispus (Reeve) differ appreciably from New South Wales shells, which are typical, as shown by the types in the British Museum. The Victorian shell received as a varietal name decorata by Sykes, and at the present time this may be used specifically for the Victorian, Tasmanian, and South Australian form. 7. Curron toneicymBa, Blainville. Blainville described this species in 1825. Quoy & Gaimard utilized this name for a common Jschnochiton found in Australia and New Zealand. ‘l'his usage persisted until 1892, when Pilsbry separated the Australian species from the Neozelanic, retaining the above name as of Quoy & Gaimard for the latter, definitely stating that this was not Blainyille’s species. ‘This disposition was accepted until one of us indicated the falsity of this procedure and definitely distinguished the Neozelanic shell with a new name. ‘This, however, did not finish the matter, for Blainville’s species still remained unrecognized. The same writer has continually endeavoured to fix this name and so effectually rid our nomenclature of an irritating item. The constant examination of the present collections has enabled us to record a favourable, though quite unanticipated, result. Blainville’s descrip- tion not being commonly accessible, we here transcribe it :— ‘« C[hiton | longicymba, Dufr. (Blainville, Dict. Sci. Nat. (Levrault), vol. xxxvi, 1825, p. 542). “Corps trés-alongé, trés-étroit; limbe couvert de trés-petites écailles comme farineuses; coquille trés-longue, composée de huit valves grandes, croissant de la premiére a la derniére, convexes et parfaitement lisses ; les intermédiaires avec des aires latérales larges, distinctes par une saillie anguleuse; couleur générale d’un vert brunatre, varié ou panaché de petites taches blanches, plus larges sur IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 105 la ligne dorsale. Cette jolie espéce existe dans la collection du Muséum; elle provient des rivages de Vile King.” The recognition of this species is very easy when the keynote is touched. Hitherto we have always been searching in the wrong place, looking at Ischnochitons with sculpture, whereas Blainville wrote ‘‘ valves . . . parfaitement lisses ’’. Rochebrune described a large number of Chitons in the Paris Museum, generally hiding every clue to their identity under ~ a peculiarly false generic location. Thus he described Schizochiton nympha (Bull. Soc. Philom. Paris, ser. vir, vol. viii, p. 36, 1884) from King Island, collected by Péron & Lesueur. No one could possibly be expected to guess that so far from being a Schizochiton, this species was exactly the opposite in every generic feature, being a Stenochiton. Yet Thiele, from an examination of Rochebrune’s type, has showed this and given figures to support his conclusions. In a similar case one of us showed that Rochebrune had redescribed the type of a species named by Quoy & Gaimard, and this enabled us to reconcile the loss of the type of C. longicymba, Blainville, with the presence of Schizo- chiton nympha, Rochebrune. f From Thiele’s description and figures there is certainty that Rochebrune renamed the Blainvillean species, and that Chiton longicymba, Blainville, is a Stenochiton. Thiele does not definitely make this a synonym of Stenochiton juloides, H. Adams & Angas, and until King Island specimens are again collected we prefer to allow Stenochiton longicymba (Blainville) as a separate species. Blainville definitely named four species as coming from King Island, viz. C. lineolatus, C. longicymba, C. hirtosus, and C. albidus. Thiele disposed of the last two, and we now recognize the two first-named. Thus C. dineolatus is later shown to be the species known as “ J. con- tractus, Reeve’’, but which is not Reeve’s species. The status of C. longicymba has just been discussed, while C. albidus from examina- tion of the type-specimen still existing must be used for one of the common species of Plaxiphora. Though Thiele recorded that C. hirtosus was based on the shell later described by Quoy & Gaimard as C. georgianus, from King George’s Sound, and therefore the locality ‘‘ King Island’ was erroneous, he did not use it. We had referred the species to the genus Scelerochiton, though Thiele selected Liolophura, but here we simply note that Sclerochiton is untenable, the name being preoccupied, and for the Chitons so named, Squamopleura, Nierstrasz, seems avail- able: of which more at a later opportunity. 8. Hzrerozona susvirinis, n.sp. Pl. IV, Fig. 2. Shell of full size for the genus, elliptical, valves low, semi-carinate, keel often obsolete, side slopes arched, valves not beaked. Colour varied, generally of shades of blue-green with lighter stripes and mottling; many specimens show a dark dorsal stripe succeeded on each side by whitish stripes; some specimens combine with the bluish shell a beautiful red-brown girdle, others even a golden girdle, though usually the girdle is darker blue-green. ‘The characteristic 106 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. coloration has suggested the specific name, but some colour-aberrations occur in which the green is lacking, being pale cream splashed with white and orange, though green even here sometimes recurs. The following description of the sculpture is drawn up from a perfectly normal specimen of small size selected as the type. Anterior valve regularly radially ribbed with about fifty flattened ribs. Median valves have six to eight similar ribs on the lateral areas; the pleural areas have a few longitudinal wrinkled threads near outer edge of the pleura, the rest of the pleura and jugum covered with fine zigzag wrinkled lines. Posterior valve regular and normal; mucro elevated about anterior third; sculpture of posterior half lke that of the anterior valve; anterior portion sculptured like the pleura. Variation in the sculpture occurs according to age in that the ribbing on the anterior valve and lateral areas of median valves increases through divarication and also tends to degenerate into nodules through the intersection of the concentric erowth- lines. The posterior area of the tail-valve shows this more stro ngly, appearing in some cases coarsely nodulose. Further with age, the pleural sculpture becomes finer and the zigzags predominate. Girdle-scales distinctive ; near the shell small pointed or tending to mucronate scales bearing striz, and comparatively regular for about half the width of the rather broad girdle; the outer half covered with minute scales, irregular and somewhat varying in size. Length of type 30mm., breadth 16mm. Dried shell. Length of largest specimen (dried) 49 mm., breadth 24mm. The series examined shows two phases, a lower broader shell and a higher narrower shell; they are certainly conspecific as far as can be determined at the present time, and the only suggestion we can make is that the differences may be sexual. This suggestion is being investigated as it may explain the discrepancies observed in other eases. ‘he internal structure is quite normal, the coloration varying slightly as the outer coloration varies. Type from Port Arthur, southern Tasmania, collected by E. Mawle. Range, east and south coasts at Tasmania. Swansea, Kelvedon (W. FO May); Port Arthur (W. Torr, W. L. May, E. Mawle). 9. CHrron conrractus, Reeve. The locality given when this species was described was ‘‘ New Zealand”. When Pilsbry dealt with it (Man. Conch., vol. xiv, 1892, p. 93) he did not comment upon this, but simply gave “Tasmania (Mus. Cuming.)”’. This was taken from Carpenter’s “Manuscript, the quotation reading, ‘‘ There are 3 specimens in the Cuming collection, from Tasmania, and two on the same tablet which are really an intermediate variety of J. castus’ As synonyms, also following Carpenter, Pilsbry added Chiton decussatus, Reeve, Chiton castus, Reeve, and Lepidopleurus speciosus, H. Ad. & Angas. Later, in the Nautilus, vol. viii, p. 129, March, 1895, Pilsbry recorded, ‘‘ By the study of many specimens received from Messrs, Bednall & Cox, I find that two species were ‘lumped’ under the name IJschnochiton contractus. (1) ZL. decussatus, Reeve, of which castus, Reeve, and IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 107 speciosus, Ad. & Ang., are synonyms, and (2) contractus, Reeve, of which Mr. Sykes considers pallidus, Reeve, a synonym.” ‘This conclusion was accepted by Bednall, though he observed he was not satisfied. Confusion of more than one species under the name contractus in ‘lasmania urged reconsideration from first principles, when it was found that the description of contractus was only applicable to the shell known as decussatus, specimens being available that agreed absolutely with Reeve’s figure and description. Reeve wrote, ‘terminal valves and lateral areas of the rest concentrically” granulated, granules solitary.” This is quite definite and sufficient to fix the species, and when this is accepted the exact shape and coloration are seen to agree. Search in the British Museum showed that the description and figure had been taken from a specimen of decussatus on the same tablet as specimens of ‘“‘ contractus auctt.”, and this had apparently been selected as being the most perfect. Consequently the name contractus undoubtedly refers to the species known as decussatus, and the synonymy given in the Man. Conch. by Pilsbry is exact. We had drawn up a description of ‘‘contractus auctt.’? when we recognized that the description of /ineolutus given by Blainville was absolutely applicable. We reproduce the latter : ‘ C[hiton | lineolatus (Blainville), Dict. Sci. Nat. (Levrault), vol. xxxvi, 1825, p. 541). Coll. du Mus. ‘Corps ovale, assez alongé; les aires laterales des valves inter- médiaires moins distinctes que dans les espéces précédentes, et offrant des stries nombreuses sur les bords; les écailles du limbe trés-petites ; les dents des lames d’insertion non pectinées; couleur variée de petites taches longitudinales brunes sur un fond jaunatre. Cette espéce, assez rapprochée de l’oscabrion alongé, a été rapportée de Vile Kang par M. Péron et Lesueur.”’ Sykes has recorded C. pallidus, Reeve, as a synonym, but the description is of a smooth shell of unknown locality. The tablet bearing the name has specimens of ‘ contractus”? upon it, as Sykes recognized, but the particular shell figured and described by Reeve is there also ; it is a smooth shell, due to extr aordinary wear, and differs in shape and is quite indeterminable, but ¢extilis is suggested, and it very probably is no¢ Australian. We give the synonymy of the two species as we now make it. Ischnochiton contractus (Reeve). Chiton contractus, Reeve, 1847 = C. sulcatus, Quoy & Gaimard, 1834, not of Wood, 1815 = C. decussatus, Reeve, 1847 = C. castus, Reeve, 1847 = Lepidopleurus speciosus, H. Adams & Angas, 1864 = Gymnoplax urvillet, Rochebrune, 1881. tange: Adelaidean Region from Flinders Island, Bass’ Straits, to Rottnest Island, West Australia (W. Torr). Note.—One of us observed that specimens in the British Museum from West Australia appeared separable. We have not seen any more shells from that locality, but Torr has again recorded it. We here note that should the West Australian form be distinguished it 108 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. will bear the name urville’, Rochebrune, given to the shell collected by Quoy & Gaimard in King George’s Sound, West Australia. Ischnochiton lineolatus (Blainville). Pl. IV, Fig. 1. Lschnochiton contractus, Pilsbry, 1895 (not of Reeve, 1847), and of all recent writers. A good description was published by Pilsbry in the Manual, extracted from Carpenter’s MS., but no figure has yet appeared. We remedy this latter point, but do not give any further description, since the shell we figure is well known, and complications occur in specimens from southern Tasmania which we have not yet completely cleared up. The typical form is very common in South Australian waters, where little variation exists. One of us collected it in the Flinders Group, and odd specimens with the same distinctive coloration have been taken in southern Tasmania. “I. contractus” must now be entirely omitted from the New Zealand fauna. 10. Iscunocurron (ANIsorapsIA, n.subg.) MAWLEI, n.sp. Pl. IV, Fig. 4. Shell of full size for the genus, elongate elliptical, valves round- backed, low, not keeled nor beaked. Colour uniform pale yellow. The following description of the sculpture is drawn up from a small normal specimen selected as type. Anterior valve sculptured, with fifty to sixty low radials, which are curved, straggling, convergent, and more or less undefined, so that scarcely any one can be traced from apex to edge. Median valves show the same sculpture on the lateral areas, but more irregular development still is here noticeable. The pleural areas are sculptured at the sides with irregular longitudinal threads, more or less wavy, which become obsolete towards the jugum, the dorsal area being covered with fine zigzag scratches. ‘Tail-valve large with mucro elevated at about the anterior third, posterior slope straight. Posterior area sculptured like the anterior valve, but more roughly, separated lozenges commonly occurring ; anterior sculpture like that of pleura of median valves. Variation in sculpture is slight, age developing moré radials on anterior valve and lateral areas of median valves, while concentric growth-lines become more prominent and tend to form lozenges on these areas, the posterior area of tail-valve generally showing this lozenge formation more boldly. Interior coloration pure white. In young shells both the tegmentum and articulamentum are brittle. The sutural lamine and teeth are typically Ischnoid, but the latter are very short. In the anterior valve twenty slits were counted in a senile shell, twenty-five in a young one, the teeth irregular in shape. In the posterior valve eighteen irregular slits were noted in the senile shell, eighteen regular ones in the young one. In the median valves the sinus is broad, about one-third the breadth of the valve, the sutural lamine are long and evenly shaped ; the lateral teeth are very short, exceeded by the tegmentum, and two, three, or four slits occur. The external appearance of the shell is distinctive, but detail figures of the valves will be given later. Girdle IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 109 broad, covered with regular imbricating small scales; in the young shell these are oval, sub-erect, with ten to twelve deep grooves, the apex smooth. Adjacent to the shell these are longer, narrower, and more erect. Small squarish granules adorn the edge. In a senile shell the scales are all more erect and more deeply grooved, while they are more irregular in shape. Length of type (dried shell) 34mm., breadth 18mm. Collected by E. Mawle at Port Arthur, - South Tasmania. Range: south coast of Tasmania. This distinctive species cannot be confused with any other Australian shell, differing as it does in shape, colour, sculpture, and internal features. It is a very fine discovery, as it grows to 51 mm. X 24mm. in the dried specimen. We have already indicated that its relationships are obscure and its range is very restricted so far as at present known, for such a conspicuous shell could not escape notice by collectors as keen as those of Victoria and South Australia. 11. CuHrron pivErGENsS, Reeve. Reeve’s description and figure were not carefully considered: by Pilsbry when he separated divergens, Reeve, from fruticosus, Gould, and made Chiton proteus, Reeve, synonymous with the former. Pilsbry wrote ‘‘Girdle covered with large scales’’, and remarked, “7, divergens has been erroneously united to fruticosus by Angas and by Haddon.”? Angas and Haddon were, however, quite right, as the figure shows, and the description ‘‘ ligament horny, very finely granulously coriaceous’? is very definite. Reeve’s diagnosis of Chiton proteus is a perfect description of the shell Pilsbry considered “‘ divergens”’. Tasmanian shells recorded under the latter name do not agree with specimens of proteus and are here distinguished. We may note that in the British Museum the shell apparently figured by Reeve as C. divergens is on a tablet now labelled fruticosus (quite correctly), while the type of proteus appears to be on a tablet labelled ‘‘ divergens’?. 12. IscHNOCHITON MILLIGANI, n.sp. Pl. V, Fig. 2. Shell of full size for the genus, narrowly elongate, not appreciably tapering at the ends, elevated, gothic arched, valves not beaked nor keeled. Colour varied: greenish of dull shades longitudinally streaked with darker. Anterior valve small radially, closely ribbed, with numerous low riblets, often divaricating, forty to sixty or more according to size. Median valves deep; lateral areas radially ribbed as anterior valve, eight to twelve ribs being counted; ribs low and close together. Pleura finely ridged at sides, ridges straight, succeeded on jugum by finer sculpture which is sometimes zigzag in character. Tail-valve large, mucro elevated at anterior third, posterior slope slightly concaye; sculpture of posterior area as of anterior valve and anterior portion sculptured as pleural areas. Girdle-scales large, oval, and very regular, deeply grooved with eight to ten grooves. Interior with red markings, a red horseshoe clearly seen in tail-valve ; slitting regularly Ischnoid in character, head-valve in young shell 110 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. having 13 slits, old shell 9 slits, median valve 1 slit, tail-valve in young shell 138 slits, in old shell 11 slits. T'ype from Port Arthur, southern Tasmania, collected by E. Mawle. Length 41, breadth 19mm. Largest shell: length 59, breadth 27 mm. Range: coasts of Tasmania. This species differs from Z. proteus, Reeve, in the finer sculpture of the terminal valves and lateral areas of the median valves, while the pleura shows much coarser sculpture. It grows to a much larger size, and the scales of the girdle are comparatively smaller. Compared with a typical specimen of proteus of the same size, the anterior valves show 40 ribs, the laterals 6-8, the posterior 40 ribs, as against anterior 35, the laterals 4-7, the posterior 28-30 for proteus (PL. V, Fig. 2a”). The figures will show the differences, which become emphasized as larger specimens are examined. 13. IscuNnocuiron arkrnsont, n.sp. Pl. IV, Fig. 3. Shell small, elongate oval, elevated, round-backed, valves not beaked. Colour uniform buff. Anterior valve coarsely quincuncially punctate, though obscure radials can be distinguished; the type- specimen figured is half-grown only, since the valves become eroded and brittle at a very early stage. In the senile shell obscure radials predominate on the anterior valve. Median valves have the pleural areas coarsely quincuncially pustulose, the pustules round, flat-topped, and finer on the jugum, which is always much eroded in senile shells. The lateral areas are well elevated, pustulose only in the adult, coarse, nodulous radials being developed with age, that are, however, dominated by the concentric growth-lines so that they appear as if concentrically granulose. The posterior valve is pustulose in the immature stage, which first shows the development of stronger sculpture. In the senile shell the mucro is elevated and central, the posterior slope slightly convex, sculptured with apparently elongate nodules, caused by the intersection of the radials with the growth- lines. Gurdle-scales regular, very small, and finely striate. Internal coloration white; slits normally Ischnoid, nine in anterior valve, one in median valves on each side, eleven in posterior valve. Type collected by Mr. E. D. Atkinson, J.P., at Sulphur Creek, northern Tasmania. Length 8, breadth 4:5 mm. Senile shell: length 13, breadth 7 mm. Dried shells. Range: northern Tasmania. Also collected by Dr. Torr. The minute striated scales of the girdle at once distinguished this small species from the immature of Z. decoratus (Sykes), and there is at present no other species with which it can be confused. It suggested ‘‘gryer’”’ recorded by Dr. Torr from South Australia, but we find it quite distinct, as will later be shown. 14. Cutrron usrunatus, Reeve. Angas, in 1867, recorded Lepidopleurus ustulatus (Reeve) from Port Jackson. Pilsbry (Proc. Acad. Nat. Sci., 1894, p. 70, footnote) commented ‘‘ Jsehnochiton ustulatus, Reeve, occurs abundantly in South Australa, but nothing I have seen from Port Jackson IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 111 corresponds to this species”. Bednall (Proc. Malac. Soc., vol. 1, April, 1897, p. 144) then recorded a species under this name, giving a very fine word-picture of the shell, and observing, ‘‘ Kecorded by him [Angas] from New South Wales, where it does not appear to occur. I have received specimens of J. divergens (= proteus) under this name.” Bednall’s species does not agree with the type of teeve’s species, but is a very distinct unnamed shell. We would note that Sykes (Proc. Malac. Soc., vol. ii, July, 1896, p. 88) also recorded Ischnochiton ustulatus (Reeve) from Port Phillip. We have not seen the shells so named, but they may have been the true wstulatus, since there are shells in the British Museum dredged in Port Phillip which agree very closely with the type lot of ustwlatus, Reeve. 15. Iscunocurron torn, n.sp. Pl. V, Fig. 3. Ischnochiton ustulatus, Pilsbry, Proe. Acad. Nat. Sci. Philad., 1894, p- 70, footnote, and of Bednall, Torr, May, and Thiele, but not Chiton ustulatus, Reeve. Shell of full size, for the genus narrowly elongate, girdle broad, elevated, round-backed, valves not beaked. Colour red brown, longitudinally striped with cream, stripes more prominent om the dorsal area, lacking on head-valve. Anterior valve very finely radially ribbed, about fifty being counted on normal specimen. Median valves, with lateral areas strongly elevated, similarly sculptured, but sculpture commonly tending to elongate lozenge shapes through growth-lines. Pleural areas very finely quincuncially punctate, somewhat linear towards edges, even fine on the jugum. Tail-valve with mucro elevate, ante-central, posterior slope a little concave; the posterior sculpture like that of anterior valve, but much more cut into lozenges by the concentric growth-lines. Internal features normal. Girdle very broad, covered with microscopic scales, not distinguishable with an ordinary lens. This is diagnostic. Under the microscope the scales are seen to be elongate ovals, a little variable in size, flattened, and closely imbricating; they average about a tenth of a millimetre long, and are finely striated with about twelve striz. 'ype from Barren Island, Flinders Group, collected by W. L. May. Length 29, breadth 14 mm. Range: Adelaidean region from Flinders Group to West Australia, recorded by Torr and Thiele. This very distinct species stands quite alone, not only in shape, coloration, and sculpture, but in its microscopic girdle-scales. We have given a section of the girdle of one of the type series of Chiton ustulatus, Reeve, for comparison, drawn from the specimens in the British Museum (Pl. V, Fig. 3a”). We have not yet recognized Reeye’s species, though it certainly seems Australian. 16. IscHNorapsta EVANIDA (Sowerby). In the ‘‘ Mag. Nat. Hist. (Charlesworth) ”’, vol. iv, June, 1840, Sowerby described (p. 290) Chiton australis (Conch. Illus., fig. 46), Australia, and (p. 291) Chiton evanidus (Conch. Illus., fig. 139), New Holland. 112 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. The descriptions and figures are good. When Reeve wrote his Monegraph he doubtingly made the latter synonymous with the former, introducing as new species pl. XVil, sp. 104, Chiton metallicus, Australia, Mus. Cuming, and pl. xxi, Sp. 142, Chiton novehollandia, New Holland, Mus. Brit. Pilsbry made evanidus and metallicus synonymous with australis, writing : “The synonymy .. . is unquestionable,’ and giving as habitat ‘¢ Port Jackson, Australia”. J. novehollandie was admitted as distinct from ‘‘ Adelaide, S. Australia’. Shells from the two localities named (New South Wales and South Australia) are very distinct. Recognition of two forms in Tasmania necessitated re-investigation, which revealed that the form recorded as ‘‘ australis” from that locality had little to do with the typical Sydney shell. The description of evanidus gives as the salient features ‘‘ central areas smooth in the middle, faintly striated at the sides; lateral areas rather elevated, with radiating granular strie”’. This disagrees with australis, but describes the eastern l'asmanian shell very exactly. The north-west Tasmanian form differs in the absolute smoothness of its pleural areas and seems identical with the South Australian shells known as JL. novehollandie (Reeve). It is easy to separate these when series are compared, but individuals are not so clearly differentiated, and we are not certain about immature shells, the north-west form being apparently more elevated. However, the species of Jschnoradsia seem to have exceedingly narrow limits, so that for the present we may recognize two species in Tasmania. We make this observation because we have an undescribed species from Caloundra, Queensland, which is exceedingly like evanida, though the very different australis intervenes geographically. 17. Lortca crmorra (Reeve). In the Conch. Icon. Chiton, pl. vi, sp. 31, fig. 31, February, 1847, Reeve figured and described Chiton volvox from specimens in the Mus. Cuming, collected at Sydney, New Holland, by Jukes. Later in the same work (pl. xxi, sp. 141, fig. 141, May, 1847) Reeve added Chiton cimolius from the same collection, the only locality given being Australia: he observed, ‘‘ Allied in form, but not in sculpture, to the C. volvoxz; at a loss for a name, I have distinguished its resemblance in colour to the common fuller’s clay.”’ The differences are not clearly defined in the descriptions, but we note with regard to the former ‘‘ridges narrow, slightly waved, interstices peculiarly crenulately latticed”’, and to the latter ‘‘ central areas smooth in the middle, ridged on each side, ridges thin, scarcely granulated, interstices hollowed ’’. In 1871 Angas, recording Zorica angast from Port Jackson, commented (Proc. Zool. Soc. London, 1871, p. 97), ‘‘ A species quite distinct from JZ. cimolia, Reeve, of which Z. volvox, Reeve, is a synonym.”’ In the Man. Conch., vol. xiv, p. 237, 1893, Pilsbry accepted this synonymy, probably following Haddon (Rep. Zool. Res. Challenger, vol. xv, Polyp., p. 31, 1886), writing, ‘‘ The differences IREDALE & MAY: MISNAMED TASMANIAN CHITONS, 463) between ZL. volvox and L. cimolia are easily effaced when a good series is examined.” He also suggested Chiton rudis, Hutton, as a synonym. Hutton’s species was based on a specimen in the Colonial Museum, Wellington, New Zealand, supposed to have been collected in that country. This determination has been accepted by all workers since, Bednall, Suter, Torr, Thiele, and ourselves all passing this synonymy without question. The consideration of the present collection necessitated a review, and with the types of Reeve’s species, topotypes of the first-named species, South Australian specimens, and shells purporting to have been collected in New Zealand we find that Lorvea cimolia, Reeve, is the name for the Tasmanian species, which differs at sight from the New South Wales shell in lacking the very distinct latticing between the longitudinal ribs of the central areas. The ribs are more distant and not so definite; the girdle-scales differ in size, and there are other minor differences. Basset Hull (Proc. Linn. Soc. N.S. Wales, vol. xxxv, 1910, pl. xvii, figs. 1, 2) gave illustrations of half-valves of the fossil Lorica duniana, n.sp., and the recent Z. volvoz, Reeve. Relying on the excellent illustrations, we cannot separate the recent Tasmanian and South Australian species from the fossil LL. duniana, which would thus become a synonym of JZ. eimolia, Reeve. It may be possible later on to differentiate southern ‘Tasmanian from South Australian shells, but typical Z. volvox cannot be confused with either. The juveniles of the two species also show striking differences in many respects. Lorica was reduced by Thiele to subgeneric rank under Callistochiton, Loricella and Squamophora being given similar rank. Thiele over- looked the fact that Loriea had priority, and that Callistochiton would be the name to suffer. We cannot see, however, that there is such a close relationship, and maintain all the groups with generic value and suggest later that they will not be closely associated. Squamophora seems very near to Loricella, but when the juveniles of Loriea, Loricella, and Callistochiton are compared little resemblance is found. With regard to the genus Callistochiton, we would note it has been badly handled in Australia. The generic (or family) characters have been taken as specific, and hence orr recorded that he had traced C. antiquus from Queensland to West Australia. The northern Queensland shell differs from the Sydney one, which is easily separable from the South Australian form, which, however, may be the one inhabiting Bass’ Straits, and may range to south- west Australia. The southern Tasmanian shell is, however, so very different that we are dubious of every record we have not personally investigated; and we note variation among unlocalized South Australian examples. 18. CALLisrocHITON MAWLEI, n.sp. PI. IV, Fig. 5. Shell small, elliptic oblong, elevated, keeled, side slopes curved, valves not beaked. Colour orange-brown with distant dark-brown spots; girdle orange-brown tessellated with dark-brown stripes. Anterior valve with twelve distinct rounded radial ribs with deep 114 PROCEEDINGS OF HE MALACOLOGICAL SOCIETY. intervals, apparently smooth but under a good lens showing transverse scratches. Median’ valves with two similar ribs forming the lateral area; the ribs obsoletely scaled, probably due to erowth, and sometimes appearing nodulose. Pleura longitudinally ridged, the ridges continuing over the jugum, about twenty to the half-valve, closer ‘together as they reach the jugum, the interstices closely latticed. Tail-valve with mucro median, depressed, posterior slope convex. Anterior area sculptured as the pleura, posterior area as the anterior valve with nine ribs, scaly nodulose. Girdle covered with minute rounded scales, deeply ¢ grooved. ‘lhe internal coloration white; teeth and slitting nantals) but sutural lamine low and continuous, the sinus only showing as a slight curve. Type from Port Arthur, southern Tasmania, collected by E. Mawle. Length 17, breadth 95mm. A _ larger specimen measures 24X12 mm. Range: southern Tasmania, collected by W. L. May, Dr. Torr, and EK. Mawle. Separable at sight from C. antiquus (Reeve) by the presence of the te eaaiial ribs on the jugal area; a honeycomb structure occurs on the jugum of C. antiquus (Reeve), as here ‘figured (PL TV, Hig. aa) for comparison. Other differences exist in the keeling, size and shape of girdle-scale, elevation of mucro of posterior valve, and conclusively in the formation of the sutural lamine. ‘These are continuous, whereas they are widely separated in the species C. antiquus (Reeve), and even more so in the South Australian species. 19. SypHAROCHITON MAUGEANUS, n.sp. . Pl. V, Fig. 5. Shell large, elongate oval, elevated, a round-backed, beaked. Colour: blackish brown, with a black stripe down the jugum, succeeded on each side by a pale buff stripe, blotches of the latter colour also occurring on some of the sides of the valves. Anterior valve sculptured, with about sixteen ribs at the apex, divaricating so that over thirty can be counted at the edge; the ribs are cut by erowth-lines into irregular nodules. Median valves with the lateral areas similarly sculptured, four primary ribs becoming six to eight at the edges; pleural areas sculptured with fine slanting longitudinal threads, becoming obsolete on the jugum; these are crossed by distinct growth-lines, which do not, however, cause nodules. ‘T'ail- valve with the mucro elevated at about the anterior third, posterior slope straight; sculpture on anterior portion like that on pleura of median valves; posterior portion sculptured like the anterior valve, twelve primary ribs being noted, and as many secondary ones. Internal features normal. Girdle covered with large round oval scales, finely striated. Type from Port Arthur, southern Tasmania. Length 52, breadth 31 mm. A large specimen measures 61 X 40 mm. {ange: southern Tasmania. The history of the genus Sypharochiton in Australia is complex. Chiton pellisserpentis was described in 1834 by Quoy & Gaimard from New Zealand. Gray in 1843 added another species, Chiton IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 115 sinclair?, also from New Zealand. In 1847 Reeve figured the latter species with the locality ‘‘ Van Dieman’s Land. Dr. Sinclair”. In 1877 Tenison- Woods included this species 1m the Tasmanian ueneant but noted ‘‘ Locality doubtful. N.Z. species”. In 18938 Pilsbry included in the Manual C. pellisserpentis and C. sinclairi, but only gave for each the locality New Zealand. The next year Cox added Sydney as a locality for the former species, and later observed that he had specimens from Port Jackson which he took to be C. sinclairi. he same year Pilsbry stated he could not separate the Sydney shells sent him by Cox from Neozelanic specimens. In 1901 Tate and May replaced C. sinelairt by C. pellisserpentis on the Tasmanian list. In 1912 May and Torr write of C. pellisserpentis as ‘*the commonest of all ‘'asmanian Chitons”’, while a similar shell is common in Port Jackson. ‘The southern Tasmanian shells differ appreciably from Neozelanic shells in shape, elevation, sculpture, etc. In order to gauge the value of these differences we have studied Neozelanic shells from many localities from Auckland to Otago, and though we have observed vz ariation we have not been able to confuse Australian with Neozelanic shells. Robin Kemp collected for one of us a long series of this genus in Sydney Harbour, and these are obviously separable from ‘the Tasmanian shell and m: my of them suggest C. sinclairi. It is possible that there are two species of the genus also represented in Sydney Harbour, just as there appear to be two in South Tasmania. Certain shells have been found in the latter locality having the lateral areas as well as the pleural areas smooth. We have not yet fixed the status of this smooth shell. If it be an aberration of the present species it is unparalleled in the Neozelanic species, unless C. torrt, Suter, be its equivalent. The question at once arises, should these be classed as sub-species or species? We have carefully considered this matter in connexion with southern Tasmanian shells, of which we have the following representatives : Sypharochiton maugeanus, Yas., and S. pellisserpentis, N.Z.; Lschno- chiton milligani, Tas., and L. proteus, N.S.W.; Ischnochiton decoratus, Tas., and J. erispus, N.S.W.; Callistochiton mawlet, Tas., and C. antiquus, N.S.W.; Lorica cimolia, Vas., and L. volvox, N.S.W. ; Rhyssoplax diaphora, Vas., and R. rugosa, N.S.W., and others. It is obvious that the last three could not be treated as subspecies, and in the case of J. decoratus, Sykes, we have three closely allied species living together, scarcely any more difference being observed than between the l'asmanian J. decoratus, Sykes, and the New South Wales Z. crispus (Reeve). In the present case we have S. pellisserpentis (Q. & G.) and S. sinelairi (Gray) living together, and it is possible two pairs also occur together in Australia and Tasmania. Thus, while not dogmatizing, it seems best, until we know these faunas better, to treat each on its merits as specifically distinct, for to accurately settle the matter long series must be collected in many localities. 20. Rnyssoprax DIAPHORA, n.sp. Pl. V, Fig. 1. Shell of full size for the genus, elongate oblong, narrow, slightly tapering at the posterior end, strongly elevated and keeled, side-slopes 116 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. straight, median valves beaked. Colour generally green, end-valves and lateral areas of median valves concentrically lined with white or pale greenish, dorsal area with dark-brown triangular patch, apex of triangle posterior, sides orange marbled ; pleura green, with furrows in some cases blue-lined. In some specimens the orange marbling overruns the dark dorsal patch, and also extends on the pleura, the ribs becoming orange-brown. ‘The general appearance is, however, more or less uniform. On the tail-valve there is a very narrow white patch, more or less triangular from the mucro to the girdle, where a broader and more extensive white patch is observed. Anterior valve very perpendicular, smooth. In senile shells an obsolete radial ribbing may be distinguished under a strong lens. Median valves have the lateral areas well raised and smooth, but in senile shells concentric growth-lines are prominent and obsolete radial ribbing is rarely present. The pleural areas are cut by longitudinal furrows which are distant and reach across the valve for half its height, fading away as the jugum is approached. In other words the pleura are sculptured with shallow ribs, a broad smooth triangle being observed on the jugum. In the type figured ten grooves can be counted on the half- valve, four of which extend across the valve; in the largest specimen sixteen grooves appear, seven extending across the valve. Tail-valve with the mucro elevated at the posterior third, the posterior slope slightly concave and smooth, the anterior area sculptured like pleural areas. Girdle-scales shining, obsoletely striate, and of varied colours. Rounded in shape, they are much smaller near the girdle-margin, and are largest in the centre of the girdle. Internal features typical of Rhyssoplax. Sinus very narrow. Colour inside pale blue-green with the sutural lamine white. Type from Norfolk Bay, southern Tasmania. Length 31, breadth 17 mm. Range: southern Tasmania. This shell has been known as Chiton jugosus, but it differs at sight from the typical Sydney shell in the pleural sculpture. It seems more nearly allied to C. torrid = torrianus, Hedley & Hull, but it cannot be regarded as a subspecies thereof, nor can it be so classed in connexion with R. jugosa. We give diagrams of sections through the pleural areas of each species, taken at right angles to the girdle (P1. V, Fig. laanda”). In South Australia there lives another species, classed as C. jugosus, which is nearer to that form, but it lives with R. torriana, and so complicates the matter. Moreover, the West Australian shell called &. torrdana differs at sight from the South Australian species. Additional material is needed to accurately fix the status of these forms, but there is little doubt this shell is specifically distinct. III. Groeraruicat Nores. We have previously noted the importance of the Chiton fauna of Australia in connexion with zoogeographical problems, and have cited them in support of Hedley’s theory of the Bassian Isthmus. The results of the present study are striking and such as we had not Vou.XIL PLIV. Proc.MALAC.Soc.LOND. i H.Gronvold,del. TASMANIAN CHITONS. PrRoc.Mauac.Soc.Lonp. Se ag A ie NWR \ omy ; : Bide (quebec TASMANIAN CHITONS. IREDALE & MAY: MISNAMED TASMANIAN CHITONS. 17 ventured to anticipate. We find that not only are the Peronian Chitons quite distinct from the Adelaidean ones,but that no Peronian species occurs in Tasmania without local variation. Further, that a different Chiton fauna is developed in the south and south-east bays from that of the north coast. The latter is practically pure Adelaidean, but there isa slight Tasmanian element. This Tasmanian element is strongly emphasized in the south-east, and shows such peculiarities that we propose to designate the east coast of Tasmania. the Maveran Recion, and separate it from the Peronian Region, which we restrict to the east coast of Australia from Bass’ Straits to Caloundra, Queensland. This nomination will attract zoogeographers, and we anticipate confirmation from study in other divisions of molluscs, and also other branches of natural science. As distinctive of the Maugéan Region we would cite the species Jschnochiton mayt, Pilsbry, Z. (Antsoradsia) mawlet, Heterozona subviridis, and Callisto- chiton mawlet, described in this paper. ‘The genus Hudoxoplax has worked into the Adelaidean Region, but not into the Peronian, while other genera such as Sypharochiton range into the Adelaidean only as far as Tasmania is concerned, though otherwise represented in the Peronian region. Larger and more extensive collections may add further novelties and make the subject more interesting still. EXPLANATION OF PLATES. PLATE IV. Fig. 1. Shell of Chiton lineolatus, Blainville=contractus, auct., x 2, p. 108. la. Half valve of id., x 5, showing sculpture. 2. Shell of Heterozona subviridis, n.sp., x 2, p. 105. 2a. Section of girdle of id., x 7. 3. Shell of Ischnochiton atkinsoni, n.sp., x 8, p. 110. 3a. Half valve of id., x 12, showing sculpture. 3a’. Section of girdle of id., x 24. 3a''’. Section of girdle of I. decoratus, Sykes, x 24. 4. Shell of I. (Anisoradsia) mawlei, n.sp., x 2, p. 108. 5. Shell of Callistochiton mawlei, n.sp., X 4, p. 118. 5a. Half valve of id., to show sculpture and sutural plate, x 8. 5a’. Half valve of C. antiquus, Reeve, from Caloundra, Queensland, x 10, for comparison. PLATE V. 1. Shell of Rhyssoplax diaphora, n.sp., x 2, p. 115. la. Section through pleural area of half valve of id., x 4. 1a’. Section through pleural area of half valve of R. jugosa, x 4. 2. Shell of Ischnochiton miliigani, n.sp., X 2, p. 109. 2a". Half valve of id., x 5. 2a''’. Half valve of I. proteus, for comparison, x 5. 3. Shell of I. torri, n.sp., x 2, p.111. 3a. Section of girdle of id., x 50. 3a”. Section of girdle of Chiton ustulatus, Reeve, x 50. 4. Shellof Tasmanian specimen of Plaxiphora matthewsi,Iredale, x 24, p.101. 4a. Tail-valve of id., side view. 4a’. Tail-valve of id., front view. 5. Shell of Sypharochiton maugeanus, n.sp., x %, p. 114. *,” The enlargements are only approximate. VOL. XII.—NOV. 1916. 9 118 ON AMMONITOCERAS TOVILENSE FROM THE LOWER GREENSAND (APTIAN) OF KENT.! By G, C. Crick, F.G.S., ete. Read 9th June, 1916. PLATE VI. Tae specimen which forms the subject of the present note belongs to the British Museum collection [B.M., No. C. 14671] and came from the Hythe Beds of the Lower Greensand (Aptian) at Tovil, near Maidstone, Kent. When obtained only a portion of the outer whorl of the specimen was visible, the rest being covered by extremely hard matrix; the greater part of this, however, has been successfully removed by Mr. Richard Hall, one of the formatores at the Museum, and to him therefore we are indebted in no small degree for the admirable specimen described below.’ The fossil is fairly complete; the body-chamber occupies about three-fourths of the last whorl, but the aperture is not preserved. The shell is evolute, the whorls being just in contact. Unfortunately the youngest part of the shell is not exposed and may not be preserved; the shell begins where the coil has a diameter of about 55 mm., and three whorls are preserved. ‘lhe diameter of the whole specimen is about 510mm. (about 20 inches), the width of the umbilicus (measured from suture to suture) 225 mm., and the height of the outer whorl about 164mm. The whorls are subcircular in cross-section, wider than high, and increase rapidly. At a point about 100mm. (measured along the median line of the periphery) from the anterior end of the specimen the thickness of the whorl including the rib is 186 mm., and excluding the rib 170 mm., whilst the height of the whorl including the rib is 160mm. The earliest part of the surface of the specimen is much damaged, and the precise nature of the ornaments cannot be seen until the shell has attained a diameter of 132mm. Here the test is ornamented with coarse rounded ribs separated by intervals rather wider than the ribs; the ribs are somewhat reclined over the greater part of the lateral area, and at the umbilical margin of the whorl curve a little more forward as far as the suture of the shell. From the point where the shell has a diameter of 132 mm. the whorl exhibits at intervals a double row of tubercles, a fairly sharp one on the umbilical margin and a larger, more obtuse one on about the middle of the lateral area. Between the umbilical tubercle and the suture of the shell there are sometimes two ribs, at other times only one, rather stouter than the rest. Each pair of tubercles is connected mostly by three prominent ribs, and trom the outer tubercle there are usually three ribs passing over the periphery of the whorl, without interruption, though sometimes with 1 Published by permission of the Trustees of the British Museum (Nat. Hist.). 2 In its present condition, after development, the fossil weighs almost exactly 100 lb. CRICK: ON AMMONITOCERAS TOVILENSE. 119 a slight flattening or even a slight depression on the central part of the peripheral area. The rib connecting each pair of tubercles becomes gradually stronger until, where the diameter is 850mm., most of the fine ribs of the test have disappeared, the outer tubercle becomes more compressed and gradually approaches the periphery ; the three ribs connecting it with its fellow on the opposite side are relatively coarser and have an orad convex curve. Later the finer ornaments disappear except on the inner area of the whorl, and the shell is ornamented with strong compressed ribs, which encircle the | whorl, have a strong projection both at the umbilical margin and at the margin of the periphery, and a slight depression at the middle of the periphery. The body-chamber began at a point where the shell had a diameter of 295mm. and occupied fully three-fourths of the last whorl. At the base of the body-chamber the thickness (or width) and height of the whorl are about 135 mm. and 115 mm. respectively. The aperture is not preserved. The details of the septal-suture are unknown. On the earliest part of the outer whorl and immediately in front of the aperture the periphery is broken and exposes the siphuncle in the median line just beneath the surface in two places (see fig. 2); in one place for a length of about 78 mm., and in the other for a length of about 23 mm. ; here the diameter of the siphunele is about 4°6 mm. In a work by Emilien Dumas,! published (1875-6) after the author’s death, an ammonoid from the Lower Aptian of the department of Gard (France) is quoted (but not described) and figured as Ammonitoceras ucetia,*? other cephalopods occurring at the same horizon being very large examples of Ancyloceras matheronianum, A. gigas, Nautilus radiatus, NV. plicatus, Ammonites stobieckit, and Am. crassicostatus. The genus Ammonitoceras was not described, but the following extract from the notes of Emilien Dumas was given in a footnote by the editor of the work (Lombard-Dumas): ‘‘Ce nouveau genre doit étre placé entre les Ammonites et les Scaphites. Il se rapproche des Ammonites par sa coquille enroulée en spirale réguliére dans un méme plan et a tours en contact pendant la période embryonnaire et la période daccroissement; mais a lage adulte, le dernier tour se détache peu a peu des tours réguliers et sa projette en avant en conservant toujours une forme arquée au lieu de se prolonger en ligne droite comme dans les Scaphites.”’ In a note communicated to the Geological Society of France on the 19th December, 1910, Professor W. Kilian? noticed the occurrence of a group of loosely-coiled ammonoids in the Aptian of France, of the Caucasus, and of various other regions, in which the ornaments differ both from those of Crioceras (sensu stricto) and of Ancyloceras (sensu stricto) by the possession of only two rows of lateral tubercles 1 Emilien Dumas, Statistique géologique, minéralogique, metallurgique et paléontologique du département du Gard, 2 parts, 1875-6. 2 Op. cit., p. 405, pl. v, figs. 1, 2. 3 Ww. Kilian,“ Sur le genre ‘Ammonitoceras : Bull. Soc. géol. France, sér. Iv, vol. x, 1912, pp. 798-9. 120 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. (instead of three), of which the outer one is situated towards the middle of the lateral area, rather far from the median line of the periphery and by the ribs crossing the peripheral area without interruption. For these forms, which according to Kilian may be considered as having been derived from Acanthoplites, examples of this genus occurring with them in the Aptian, Kilian uses the name Ammonitoceras proposed by Dumas, and in it he includes the Ammonitoceras uceti@ of Dumas from the Lower Aptian of Languedoc; Crioceras transcaspicum described by Sintzov' from the Lower Gault of the Mangischlak Peninsula on the eastern shore of the Caspian Sea, and which Kilian ? states that he himself had also found in the Aptian of the Basses Alpes; also the form noticed by Kilian* (under the name of Ancyloceras ackermannt) and figured by Krenkel‘ (under Kilian’s name of Aneyloceras ackermanne) from the Aptian of Delagoa Bay, South-East Africa. The present specimen seems to be clearly referable to this group of forms and may be named Ammonitoceras tovilense, the trivial name being suggested by the locality whence it came. EXPLANATION OF PLATE VI. Ammonitoceras tovilense, n.sp., from the Lower Greensand (Hythe Beds), Aptian: Tovil, near Maidstone, Kent. Fic. 1. Lateralaspect. The body-chamber commences at a point immediately above the figure 2 on the scale. ;, 2. Apertural aspect, showing the siphuncle on the early portion of the last whorl. ,, 3. Peripheral view. The specimen is in the British Museum collection [reg. No. C. 14671]. 1 I. Sintzov, ‘‘ Untersuchung einiger Ammonitiden aus dem Unterem Gault Mangyschlaks und des Kaukasus’’: Verhandl. d. russisch-kaiserlichen mineral. Gesellschaft, ser. 11, vol. xlv, 1907, pp. 510-11, pl. vi, figs. 9-12. 2 W. Kilian, ‘‘ Sur le genre Ammonitoceras’’: Bull. Soc. géol. France, sér. Iv, vol. x, 19125 p. 799: 3 W. Kilian, ‘‘ Ueber Aptien in Siidafrika’’: Centralbl. f. Mineral., etc., 1902, p. 466. ‘ BE. Krenkel, ‘‘ Die Aptfossilien der Delagoa-Bai (Siidostafrika) ’’: Neues Jahrb., 1910, i, p. 150, pl. xvii, figs. 10, 11. “INSY SJNOLSGIVW SU ‘STIAOL'NVILdY ‘(sa3q 3HLAH) GNVSN339Y9 Y3MOT “YOIND (9°9 “‘ASNATIAOL SVYHSDOLINOWWYV Too wy é T TA Td TX TOA ag a ‘dNO'T'00S Ov TVW!90ug mt) a HAN 121 NOTE ON HELIX SCYTODES, PFR. By G. K. Gupr, F.Z.S., ete. Read 9th June, 1916. Recentity, while working at some of the land shells in the collection of the British Museum, I noticed two specimens of a helicoid which I had not seen before, viz. Helix scytodes, Pfr.,1 from the Solomon Islands. These were the type-specimens in the Cuming Collectiom. I was immediately struck with their resemblance to two unnamed shells which were acyuired by me some years ago with various other shells at an auction sale, and actual comparison of the specimens confirmed their identity. The species was referred to Zrochomorpha by Pfeiffer* and by Pilsbry,* but a careful examination of the shell convinced me that it would more correctly be assigned to the genus Plectotropis, the reflected outer and basal margins of the peristome, especially, being a feature which would at once remove it from Zrochomorpha. Both the type shells in the Cuming Collection, and those in my own, are devoid of the periostracum and do not, consequently, show the scales which are so characteristic of the genus Plectotropis, but traces of them can be seen inside the umbilicus. The shell bears a general resemblance to such species as P. winteriana, Pfr., P. tapeina, Bens., and P. squarrosa, Gld. No species of the genus Plectotropis, it is true, has been recorded from the Solomon Islands, but Cuming is well known to have been unreliable with his localities, and this may well be another instance of a wrong habitat. The species has been well figured by Reeve,‘ whose figure has been copied by Tryon.* 1 Proc. Zool. Soc., 1854, p. 56. 2 Malak. Blatt., ii, 1855, p. 133. * Man. Conch., ser. II, ix, 1894, p. 5. * Conch. Icon., vol. vii, 1854, pl. 188, fig. 1310. > Man. Conch., ser. I, vol. iii, 1887, p. 77, pl. xiv, fig. 20. is Vir i” pyle died Ears 9 ene tis 3 iby y ‘ef im) Menare I le i rt | eis any ' I Mei apt ree POA, OB ti) mW eee eth Reh Teibe LON DON: EDITED BY B. B. WOODWARD, F.L.S., ETC., Under the direction of the Publication Committee. AUTHORS ALONE ARE RESPONSIBLE FOR THE STATEMENTS IN THEIR RESPECTIVE PAPERS. Go TSG ST AE ee PROCEEDINGS :— PAGE Ordinary Meetings : November 10th, 1916......... 123 December 8th ............00006 123 January 12th, 1917............ 123 NOTES :— Hulota fruticum in Kent ...... 124 Paludestrina minuta in the IBmitishelslestc.ccctecesscus cesses 124 PAPERS :— Has Lymnea an Auriculoid Ancestry? By C. HEDLEY, F.L.S. (Figs.) On Sexual Characters in the Shelland Radula of Pomatias elegans. By Dr. A. HE. Boycor;rt, F.R.S. PAPERS continued :— PAGE On the occurrence in England of Helicella neglecta. By A. S. KENNARD, F.G.S., and B. B. WOODWARD, F.L.S. (Eye ae rect etescace 133 Patella vulgata, Linn., and P. depressa, Penn. By the Rey. Dr. A. H.COOKE,F.Z.S. 135 Note on the type-specimen of Crioceratites bowerbankii. By G. C. Crick, F.G.S. CR EOMVAUIS) iran sesenretanioner Geet 138 Revision of the Turride of the Persian Gulf, ete. ByDr. J. CosMo MELVILL, F.L.S. (Blatess VMI aX ios cates sec 140 LONDON: DULAU & CO., LTD., 37 SOHO SQUARE, W. 1. Conchological Society of Great Britain and Ireland. Hon. Sec.: Rey. L. J. SHACKLEFORD, Taranaki, Vernon Avenue, Blackpool. Subscription : 5s. per annum, or £8 8s. for life. Members are elected by ballot, after nomination on a form signed by at least two members. Meetings are held by kind permission at the MANCHESTER MusEeuM on the SECOND WEDNESDAY in each month from SEPTEMBER TO JUNE. The Journal of Conchology, the organ of the Society, is issued quarterly to all Members. *,* Back volumes to be had only from Messrs. Dutau & Co., Ltd., 87 Soho Square, London, W. Vols. II-IV and VII-XIV at 15s. each (to Members 11s. 3d.). Vols. I, V, and VI out of print. (Vol. I will be reprinted and issued at 21s. net when a sufficient number of Subscribers has been obtained.) For information concerning the MALACOLOGICAL SOCIETY OF LONDON See page iv of this wrapper. PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 123 ORDINARY MEETING. Fripay, 10TH Novemser, 1916. J. R. LE B. ToMutn, M.A., F.E.S., President, in the Chair. ‘The Rev. Dr. A. H. Cooke exhibited two sinistral shells of ZZelvx vermiculata from Palermo. Mr. A. S. Kennard exhibited a sale catalogue of shells of Sowerby’s, dated 25th May, 1829. The following communications were read:— « | 1. ‘‘Has Zymnea an Auriculoid ancestry ?”’ By Charles Hedley, ELS. 2. ‘*Sexual characters in the shell and radula of Pomatias elegans.” By Dr. A. E. Boycott, F.R.S. ORDINARY MEETING. Fripay, 8raH DecrmBer, 1916. The Rey. Dr. A. H. Cooker, M.A., F.Z.S., Vice-President, in the Chair. oe following communications were read :— e (a) Anodonta cygned, Lu. and A. anatina, L., (b) Pseudanodonta Me Au ee Locard.”’ By H. H. Bloomer, F.L. S., , and H. Overton. 2. ‘* A revision of the species of the family Pleurotomidee occurring in the Persian Gulf, Gulf of Oman, and the Arabian Sea, as exemplified in the collections formed by Mr. F. W. Townsend, 1893-1914.” By Dr. J. Cosmo Melvill, M.A., F.L.S. 3. ‘On the occurrence in England of Helicella neglecta (Drap.).” By A. 8. Kennard, F.G.S., and B. B. Woodward, F.L.S.; with notes on the Anatomy by Dr. A. E. Boycott, F.R.S., and on the Radula by the Rev. E. W. Bowell, M.A. 4. “On the occurrence of Hulota fruticum ina living state in Kent, and of Paludestrina minuta in the British Isles.” By A. S. Kennard, F.G.S., and B. B. Woodward, F.L.S. ORDINARY MEETING. Fripay, 12ra January, 1917. J. R. LEB. Tomtuin, M.A., F.E.S., President, in the Chair. Messrs. Fulton and Salisbury were appointed Auditors. The following communications were read :— 1. ‘‘ Patella vulgata, L., and its so-called variety, Patella depressa, Penn.” By the Rev. Dr. A. H. Cooke, M.A., F.Z.S. 2. ‘“*The occurrence of Manganese in Mollusea.”” By Dr. A. E. Boycott, F.R.S. 3. * Note on the holotype of Crioceratites bowerbankii, J. de C. Sowerby.” By G. C. Crick, F.G.S., F.Z.8. VOL. XII.—APRIL, 1917. 10 124 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. NOTES. ON THE OCCURRENCE OF HAULOTA FRUTICUM (MUtu.) In Kenr. (Read 8th December, 1916.)—On 10th November, 1911, an example of this species, collected at Penshurst, W. Kent, by the Rev. E. W. Bowell, was exhibited (by A. S. K.) before this Society (Proc. Malac. Soc., vol. x, 1912, p-1). It was then considered that the species could not be recognized as a member of the British recent fauna, since only one stray example had been found, but it was suggested that it might occur and be mistaken for Theba cantiana (Mont.). Recently F. Hugh Gripper informed us that he possessed some examples of a shell which he could not name, though at the time of collecting he had thought they were the white form of T. cantiana. An examination of the shells at once showed that these shells were Hulota fruticum (Miill.). They were four in number, three mature and one immature, and were collected in September, 1908, between Dover and Lydden from a roadside hedge. There can now be no question that. the species does live in Kent and has been confounded with Theba cantiana (Mont.). The attention of collectors having now been called to it, it will probably be found in other localities. The question arises whether this species can be considered a survival from the Pleistocene, or is a reintroduction. In the first place it is only known in a fossil state in England from four localities, Barnwell and Grantchester (Cambridgeshire), Stutton (Suffolk), and Ilford (Essex), and it has not yet been detected in any of the Kentish Pleistocene beds. These four deposits are all of the same age and form a well-marked horizon in the Pleistocene. The species has not been found in any Holocene deposit. in Kent. Hence it would appear that the species became extinct in Pleistocene times, and these Kentish examples must be considered a recent introduction. A.S. Kennarp & B. B. Woopwarp. ON THE OCCURRENCE IN THE Britisu Istes or PALUDESTRINA MINUTA (Torren). (Lead 8th December, 1916.)—About two years ago Dr. A. C. Johansen called our attention to the existence of this species in a living state at Blythburgh, Suffolk, examples having been given to him by one of us (A. 8. K.). He pointed out that the species differed in its anatomy from P. ventrosa (Mont.) and forwarded Danish examples. We had hoped that he would have published the discovery himself, but since he has not done so we think it is quite time the fact should be recorded. Though greatly resembling P. ventrosa in its general appearance, P. minuta may be distinguished by its smaller size and more regular growth, the last whorl not being so inflated. We have now noted it. in a recent state from Blythburgh, Southwold, and Lowestoft (Suffolk), Woolwich (Kent), Strangford Lough and Killough (co. Down), and in the Holocene from Littleport (Cambridgeshire), St. Ives (Huntingdonshire), Deal (Kent), and Waterloo (Surrey). In all probability P. mdnuta is a widely distributed form in these Islands. Perhaps it may be of interest to add that we have lately received from Mr. F. W. Harmer, through Mr. Alfred Bell, a gathering taken at Kaasjes- water, near Zierikzee, at the mouth of the Scheldt, Baster’s locality for his Turbo stagnalis. Baster’s description is too meagre and his figures too weird to recognize his species, which has been assumed to be a synonym for the wlve of Pennant. This gathering, however, consists almost exclusively of Paludestrina minuta, the shells of which are coated, as Baster describes, with a whitish limy deposit. A. S. Kennarp & B. B. Woopwarp. 125 HAS LYMNZA AN AURICULOID ANCESTRY,? By Cuartes Heptey, F.L.S., ete. Read 10th November, 1916. Criricat study of fluviatile faunas has lately broken up the alliances of former classifications and frequently ascribes to each smaller group an independent origin from marine species. Thus the Lymneide of Fischer’s Manual has been divided since 1883 into Lymneide, Planorbide, Ancylide, and Physide, while Chilina is regarded by Dr. H. A. Pilsbry as having arisen in South America from a marine parent. From what marine type did Lymnea come ? Judging from its radula, Mr. F. C. Baker proposed for Lymnaea ‘‘a descent from the Tectibranchiate stock of marine mollusks’’.! It is now suggested that the Ellobiide may stand closer to Lymnea than any Tectibranch. Phytia ornata (Férussac). Upper and under view of the animal crawling. In shell features the remarkable strongly-twisted pillar of Zymnea may answer to the prominent columella folds so radical a character of the Ellobiide. The animal of Zymnea is well known, but there are few drawings, or descriptions from life, of the auriculoids. The following notes which prompted the query at the head of this paper are therefore advanced for comparison. Phytia ornata, Férussac,? is abundant and widespread in South-East Australia and Tasmania. Its habits are to associate with Rhodostoma, Salinator, and Assemannia, in the Salicornia zone, that is just below high-water level in sheltered estuarine swamps, either in the open or 1 Baker: Chicago Acad. Sci., Spec. Publ. No. 3, 1911, p. 9. ? Hedley: Proc. Linn. Soc. New South Wales, xxxviii, 1913, p. 334. 126 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. under the shade of the Avicennia mangrove. At low tide the Phytia crawls over the mud at a fair pace, and if placed in a vessel of sea-water it soon creeps out and always moves steadily away from the light. The foot is small and narrow for the size of the shell. There is no operculum. ‘The facial area is darker in colour and covered with finer tubercles than the rest of the animal; it is marked off from the foot by a groove on each side, When the animal is extended the tentacles are planted well apart, but seem to spring from contiguous bases when it is contracted. They are subcylindrical, slightly tapering, blunt at the tips, contractile not evaginate. The eyes are sunk within the substance of the tentacle at the inner base. Near the tip of the muzzle are two white oblong marks that may represent the smaller tentacles of the Helicide. The muzzle is unusually broad, being as wide as the foot. Sometimes it is emarginate in front and usually recurved at the margins. The mouth is in the centre of a large labial disc. Between this dise and the fore-part of the foot is a shallow pouch. Here there seems to be a general correspondence to the pattern of Lymnaea, the chief distinction being the longer and narrower tentacles of Phytia. Acclimatization from salt water to fresh is easy in warm temperatures, but difficult in cold. So it was perhaps during the warmer periods of the Kocene or Cretaceous that the rich Lymneid fauna of the Northern Hemisphere arose from auriculoid sources. ON SEXUAL CHARACTERS IN THE SHELL AND RADULA OF POMATIAS ELEGANS (MULLER). 3y Dr. A. E. Boycorr, F.R.S., etc. Read 10th November, 1916. Some years since’ I examined the shells of a series of Pomatias elegans from Ashtead in Surrey for sexual characters and found that the females were longer and wider than the males, but not more tumid, i.e. the ratio of length to breadth was the same in the two sexes. In the present communication I give the results of the examination of some 400 specimens, collected on about a hundred yards length of chalky hedge bank in the parish of St. Stephen, near Aldenham, in Hertfordshire, on 28th June and Ist July, 1916, when they were crawling freely on the surface after rain. All specimens found were taken without selection. The two lots were analysed separately, but no significant difference was found in any respect and they are treated below as forming one series.? The shells were measured with sliding callipers to 0°1mm., the length (altitude) being taken parallel to the axis of the shell and the breadth (diameter) at right angles to the length. The fraction altitude diameter course afford a complete description of the shells; with regard to the shape of whorls, depth of suture, size and shape of mouth, and the like, I can only say that by visual inspection I can detect no difference between males and females, In comparing males and females it is necessary in the first instance to take only mature specimens, and as the criterion of maturity the completion of the peristome has been used. There will obviously be a certain number of specimens in which it is a matter of opinion rather than of fact whether the peristome is complete or not; but such specimens are few in number, and, noting also the texture of the edge of the shell and the depth within the mouth where the operculum makes a good fit, there does not seem to be much danger of any substantial inconsistency in the determination of maturity, at any rate within the same series of shells examined at x 100 gives a measure of tumidity. These figures do not of 1 Journal of Conchology, vol. xii, 1909, p. 323. 2 e.g. in the first lot males formed 54 per cent of 130 mature specimens, in the second 61 per cent of 187, a difference easily compatible with the two lots being random samples of the same series. % I do not know whether sexual activity is restricted to individuals which are mature by this standard; anatomically the sexual apparatus seems to be pretty fully developed in the larger immature specimens (e.g. in many of the males of 11-5mm. altitude). In species where the growth of the shell reaches a definitive termination (e.g. Tachea), completion of the shell seems to precede sexual action. The six pairs taken im cop. in the present series were all mature. 128 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. one time. Unless otherwise stated, the following refers to specimens judged to be mature in this way. Of 317 specimens, 184 (58 per cent) were males and 133 (42 per cent) females. I. Axrirope anp DIAMETER. ™The altitudes and diameters, distributed in convenient groups of = > 0:3 mm., are shown in the table, which gives also the relation between altitude and diameter for each group. DIAMETER mm. * . . * Se =) oO So Son fal . nl a lor) for} for) oon ton ol onl rc re n 3 a4 © a a 1S ) a Sian ire Bk o |< eae . 2 > f 3 5 S ; = : 3 Bas Se oe See wes eS. es:) 2) ene 12-0-12-2 3+0 3 3 12°3-12°5°|}4+0 J+o 1+0 12 12 g 12-6-12'8 |8+o ll+o 11+o 4+0 34 34 g 12-9-13-1 5+o 1l+o 9+0 3+0 28 28 13*2-18'4 | 1--o 3--o 19+ 7-1 5-0 -Fo 46 2| 48 A 18-5-13-7 4+2 20+7 18+6 2+3 O+1 39-19 | 58 p 13-8-14-0 7+2 74+6 5+6 0+3 19 17 | 36 H 14-1-14°3 0+3 2+13 O+7 O+6 O+5 2 34 | 36 3 14-4-14°6 1to O+:r O+10 0+7 O+5 O+t 1 24 | 25 < 14-7-14-9 (ee (ame) (aeey (aah (ae aye ily; 15-0-15-2 O+r O+6 O+3 O+1 et ail lid 15-3-15:5 0+3 O+3 O+F12 AN Ul 15:6-15°8 0+: O+1 7 || 0) Mailesnoaay || 28 29 46 58 30 8 184 Females. . 3 13 28 33 29 20 6 I 133 Total.) . 18 29 49 71 58 41 29 20 6 1 [317 “13 + 6=13 males, 6 females. Further analysis of these figures gives the following summary results :— ALTITUDE mm. Standard Coefficient Max. Min. Mean. deviation. of variation. Males : 14°5 La Toei 0°470 3°6 Females . 15°8 Si 14°36 0°539 3°8 Total 5 15°8 1A 13°69 0°707 9-2 DIAMETER mm. Males 4 10°3 8°6 9°44 0°376 4:0 Females . 11°4 9-2 10°26 0°435 4-2) Total ‘ 11°4 8°6 9°78 0-571 5°8 It is clear from these results! that the females are definitely larger than the males. Of the males 77 of 184 (42 per cent) are smaller (in altitude) than the smallest female, and of the females 47 of 133 1 For statistical methods and the interpretation of the results I have followed G.U. Yule, Introduction to the Study of Statistics (2nd ed., London, 1912), where a plain account of the methods of testing the validity of numerical differences will be found. BOYCOTT : SEXUAL CHARACTERS IN POMATIAS ELEGANS. 129 (35 per cent) are larger than the largest male, the average female being 1:2 mm. longer and 0‘8 mm. wider than the average male. If anyone therefore wants to breed Pomatias it is probably safe to assume that the largest shells are females and the smallest males; about two-thirds might from their size be of either sex. It would be a matter of much interest to determine whether there is any size selection in mating. In the present series only six pairs were taken 7 cop.; in each case the male was smaller than the female :— Male. Female. Male. Female. 115355) 113397) 13°2 15°2 12°6 Naye7( 13°4 14°6 13°4 14°6 1 seFi 13°5 Il. Yomrprry or SHett. altitude diameter differs in the two sexes, we have the following figures, the shells being grouped by altitude into half-millimetre groups :— Taking next the question whether the tumidity ( index) MALES. FEMALES. TOTAL. Group. No. Mean index. No. Meanindex. No. Mean index. 12°0-12°4 6 (139) ~- — 5 (139) 12°5-12°9 46 139 — — 46 139 13°0-13°4 wl 140 2 (141) 7 140 13°5-13°9 50 140 26 139 76 140 14°0-14°4 10 142 52 139 62 140 14°5-14°9 1 (149) 33 140 34 140 15°0-15°4 —_ — 16 142 16 142 15°5-15°9 = — 4 (143) 4 (143) Total; 184 140 133 140 SLe/ 140 aininge. + 100. Males. Females. Total. iameter 130-132 6 6 12 133-135 13 ll 24 136-138 43 31 74 139-141 61 35 96 142-144 44 36 sO 145-147 14 3 27 148-150 2, ] 3 151-1538 1 0) ] Mean 6 6 . 139°91 159°86 139°88 Standard deviation . 3°645 3°951 3°165 Coefficient of variation 2°6 2°8 23 Taking the results as a whole, or dealing only with the groups (13°5 and 14:0 mm. altitude) which contain a fair number of both males and females not differing very grossly in size, there is no evidence that there is any sexual difference in tumidity. The index has a low variability,! and the evidence that it varies with size is indefinite, though there is some suggestion that the larger shells are relatively more slender. 1 Corresponding with a high correlation (+0-92) between altitude and diameter. 1380 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. III. Weteur or SHEtr. The average weights of the shells with opercula (dried at 100° C.) showed no difference between males and females except that due to size.) In the 13:5 mm. group the sizes and weights are identical: in the 14:0 mm. group the females (14°2 X 10-1) had larger shells than the males (14:0X9°9). Hence we may conclude that there is no sexual difference in shell thickness. GROUP. AVERAGE WEIGHT IN MILLIGRAMMES, mm. alt. Males, Females. 12°5-12°9 154 — 13°0-13°4 169 — 13°5-13°9 186 186 14°0-14°4 198 205 14°5-14°9 -— 230 15°0-15°4 -~ 244 Mota . ral Silies IV. Rapoza. The bodies were used for various purposes; from 185 (112 males, 73 females) the radule were extracted by boiling with caustic soda and mounted in Farrant’s solution. No sexual difference in the shape or character of the teeth could be made out, and beyond three cases with multicuspid centrals there seemed to be no gross variations; for numerical examination the length of the radula and the number of transverse rows of teeth were determined. The length is given in arbitrary units, 12°8 of which equal 1 mm. MALES. FEMALES. Group. No Mean size Mean length Mean No, No Mean size Mean length Mean No. Alt. of shell. J of shell. of radula. of rows. Tak of shell. of radula. of rows. 12:0-12°9 29 126x9-1 ~§ 64:4 964 — — — 13°0-13°4 Bf — Ue esos MP7 99:2 — a= —- — 13°5-13°9 S6r los 7x 958) 69's 98°5 14) S1365e 1957) 270°9 99°1 14°0-14°4 10 140x9°9 69:9 104°8 Diy ete (ess iyftes, 98°7 14°5-14°9 — — = — DOW a x< 1056) ORs 98°8 15°0-15°4 — ss — = Wik bysisei oer 7aleil 97°0 LENGTH. Long. Males. Females, Total. 50-55 2 — 2 56-61 8 — 8 62-67 37 12 49 68-73 50 95 io 74-79 13 22 35 80-85 2 10 12 86-91 — 3 3 92 — 1 1 Mean . . 68°52 (8:35mm.) 73°89 (5°77mm.) 70°63 (5°52 mm.) Standard deviation . 5°283 6426 6°330 Coefficient of variation 7°7% 8°7% 9:0% Maximum . 6'4mm. 72mm. 772mm. Minimum 4°0 mm. 4°‘8 mm. 4‘0mm. 1 The weights are nearly proportional to the calculated shell volumes, the ratio volume to weight varying only from 2:5 to 2:6 on passing from the smallest males to the largest females. BOYCOTT: SEXUAL CHARACTERS IN POMATIAS ELEGANS. 131 NUMBER OF Rows. Rows. Males. Females, Total. 78-85 12 3 15 86-93 93 PA 44 94-101 40 19 59 102-109 2 22 45 110-117 10 5 15 118-125 Be 2 4 126-129 Be 1 3 Mean . ; : , 98°25 98:29 98:27 Standard deviation . 10°07 9°61 9°90 Coefficient of variation 10°2% 9:8% 101% Maximum : 129 127 129 Minimum . : ; 78 79 78 These figures show that the females have a larger radula than the males but about the same number of transverse rows; in the males the number of rows appears to increase as the shell becomes larger, while in the females it remains the same or even becomes less. Whether the difference in length is due to the larger size of the females is uncertain without more ample data for males and females of equal size. Relatively to the volume of the shell and the weight of the body the female radula is obviously short and has few rows, but the same is true of the larger males and females compared with smaller individuals of the same sex. The ratio of the volume of the female shell to that of the male is about 1380: 100.2 The average weights of a series of bodies dried at 100° C. are given below, the general ratio being 188: 100. On the whole, therefore, while the radula of the females is slightly but clearly different from that of the males, it 1s hardly legitimate to call it a sexual difference without clearer exclusion of the size factor. MALES. FEMALES. Group Noe ea eg Oe Nom Faeren - sehtae saa 12:0-12‘9mm. 17 12x89 48 — — — 13°0-13°9 46 Srooxeo re oo _ de} 13°6x 9°8 62 14°0-14°9 6 14°1x9°8 58 35 14°4 x 10°2 12 15°0-15'9 —_ —- os ll Isa ise UO e7/ 87 V. Sex or Immature SPECIMENS. Those of the cmmature specimens which were 10 mm. or more in altitude were examined for sex and gave 40 per cent males,® dis- tributed as follows :— 1 It is obviously illegitimate to bring immature specimens into the comparison, the radula being a feeding organ, and the amount of food required being presumably quite different in growing and adult individuals. 2 i.e. assuming the shell is a regular cone with a base equal to the measured diameter and a height equal to the measured altitude. 3 This does not satisfy the statistical test that there are really fewer males in the immature than in the mature specimens (58 per cent). 132 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Group. Males. Females. Total. 10mm. 8 9 17 11 9 12 21 12 1] 15 26 13 33 9 1) 14 0 1 1 Total mel 46 77 VI. Cotour Varration In SHELL. Among the 317 mature specimens were 64 (20 per cent) of the pale form (var. ochroleuca) and in the 77 immature 16 (21 per cent) ; there is no evidence that this variety has any relationship to size or sex :— MALES. FEMALES. TOTAL. Group. Total No. No. of Total No. No. of Total No. No. of =per cent. ochroleuca. ochroleuca. ochroleuca. 10mm. 8 2 9 0 17 2 12% 11 9 1 12 ] Pall 2 10 AZ 63 15 15 6 78 21 27 13 124 19 Sl 10 161 29 18 14 ll 2 86 2) 97 Die 24 15 — — 20 3 20 3 15 Total. 215 39(18%) 179 41 (22%) 394 80 20%, VII. Summary. (a) Females are larger than males. (6) There is no difference in shape nor, allowing for size, in weight. (c) The female radula is longer, but has not more teeth, than the male radula. (d) The var. ochrolewca has no sexual significance. ON THE OCCURRENCE IN ENGLAND OF HELICELLA NEGLECTA (DRAP.). By A. S. Kennan, F.G.S., and B. B. Woopwarp, F.L.S., ete. With notes on the Anatomy by Dr. A. E. Boycorr, F.R.S., and on the Radula by the Rev. E. W. Bowenr, M.A. Read 8th December, 1916. In September, 1915, several examples were found by one of us (A.S. K.) on a grassy bank near Luddesdown, West Kent, of a Helicella which was obviously new to our fauna. In the same month this year two excursions were made to the localitv. On the first occasion about six living examples and several dead shells were met with, but on 17th September about thirty examples were collected, whilst a number of immature specimens were left. On comparing our shells with the large series of this genus in the Norman Collection in the British Museum (Natural History) we were able to identify them as Helicella neglecta (Drap.), and this has been confirmed by Mr. G. K. Gude. Luddesdown is a small village about one mile south of Cobham, and is situated on the Chalk. The bank where the species occurs is about three-quarters of a mile south-west of Luddesdown church. It is a grassy bank about six feet high, and is really a large gap in the roadside hedge. It is a very remote spot, and we can offer no solution as to how the species came to be established there. Search was made in the neighbourhood to see if it occurred elsewhere, but so far it appears to be restricted to this one locality. We, however, hope next year to make a more extended search in the neighbourhood, for it is extremely probable that this is not an isolated colony. The district is not only a remote one, sparsely populated, but it is also famous for the number of its botanical rarities. Helicella neglecta has been well figured by Draparnaud (Hist. Nat. Moll. France, pl. vi, fig. [125] 13), by Moquin-T'andon (Hist. Nat. Moll. France, pl. xviii, figs. 27-9), and by Bourguignat (Moll. Algiers, pl. xxx, figs. 12-18). According to Westerlund it lives in Southern France, Italy, Spain, Greece, and Algiers, whilst Moquin-Tandon records it from Central and Southern France. ‘he occurrence of this species in West Kent thus affords an interesting analogy with the presence of //elicella elegans (Gmel.) near Dover. In its habits it appears to resemble H. gigaxti, Pfr., for nearly all the examples were high up on the stems of grasses. In captivity it partakes freely of lettuce and carrot, but is decidedly a shy species, retiring into its shell on slight provocation. ANATOMY. The obvious anatomical distinction of Mr. Kennard’s specimens from any known British Helzcell/a is the presence of a double dart-sac lying on one side of the oviduct with a single dart, ¢fala having two sacs one on each side with two darts, virgata, gigaxwi, and caperata asingle sac. Apart from this the anatomy is similar to that of ¢tala in its general features. The dart is of a simple slightly curved 154 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. acicular type. The second sac has slighter walls, and recalls the accessory dartless sacs of Hygromia rufescens, fusca, and (from Moquin-Tandon’s account) Helicella carascalensis. 7M. Helicella neglecta (Drap.).—F1G.1. Genitalia of specimen whose shell measured 10°5mm. in diameter: a.d. accessory dart-sac ; d. dart-sac ; g.o. genital orifice ; m.g. mucous glands ; fee r. retractor muscles ; s. sperma- theca ; v.d. vas deferens. ia. . Unci of Radula. Fic. 3. Maxilla. XADULA AND MAXILLA. The radula is 2°47mm. long and 0°96mm. wide. There are ninety-four rows of unci. The admedians merge gradually into the externals. Ten typical admedians may be recognized, leaving twenty externals; of the latter, the lateral ten or twelve have a well-marked median cone. This is the condition which I have elsewhere described as ‘‘ bifid mesocone”’, but in this case the accessory cone has more the appearance of an appendage median to the mesocone. In my figure of H. caperata (Proc. Malac. Soc., viii, p. 384) this feature is more regularly represented than I have since found to be usual; it is quite common to find an irregularly scolloped median margin to the mesocone in that species. The general appearance of the unci is shown in Fig, 2. The maxilla is narrow, presenting no central increase of length. It is provided with eight or nine ribs. Its width is about 1mm. (Fig. 3.) 155 PATELLA VULGATA, LINNEZUS, AND ITS SO-CALLED VARIETY, PATELLA DEPRESSA, PENNANT. By the Rev. A. H. Cooxn, Se.D., F.Z.S. Read 12th January, 1917. Pennant, British Zoology, vol. iv, 8vo ed., 1777, p. 142, described his- Patella depressa as a ‘‘ shell much depressed, the vertex approximating nearly to one edge. More oblong than the former” [ vulgata }. Forbes & Hanley, Hist. British Mollusca, vol. ii, p. 428, under the name athletica, Bean, regard depressa on conchological grounds as a true species, but, after mentioning that the two forms ‘inhabit different levels, the vu/gata being always in the higher zone’’, add the singular statement, ‘‘We have sought in vain for differences between the structure of the tongue in this and the common species.”’ Jeffreys, Brit. Conch., vol. iii, p. 237, regards depressa, Penn., as avar. of vulgata, and ‘‘ cannot find a single permanent character which will serve to distinguish ”’ them or the var. ¢ntermedia, Knapp. The authors of the List of British Marine Mollusca published by the Conchological Society (Jowrn. Conch., vol. x, 1901, p. 16) appear to have been of the same opinion, since they kept depressa as one of the vars. of vulgata, but in their revised edition (1902) they treat them as separate species. If the radula of a specimen of vulgata, the shell of which measures 2 inches in length, be laid ont alongside the radula of a specimen of depressa, whose shell is also 2 inches long, it will at once be noticed that the radula of depressa is markedly shorter than that of vadgata, probably by as much as 4 to 3 inch. Two other points will strike the observer: the radula of depressa is much broader than that of vulgata, and the nascent portion is relatively much shorter and terminates more abruptly. Thus a radula of vulgata measuring 84:2 mm. long is ‘8 mm. broad, with perhaps 25 nascent and 190 adult rows, while a radula of depressa 55°6 mm. long is 1°6 mm. broad, and has 6-7 nascent and 112 adult rows. If a long series of the two forms be taken, and the radule of shells of equal length, from the same locality, examined, this difference becomes more striking. Beginning with shells measuring 58°8 mm. (the largest procurable of both species) and forming a series with shells decreasing each time by an equal amount (1°6 mm.), we find that in every case the radula of depressa is markedly shorter than that of vulgata. Sometimes the amount of difference is so large as to be startling; thus in the case of shells measuring 55°6 mm. the radula of vulgata is 89 mm. long, that of depressa 47°8 mm., a difference of 41:2 mm., or more than 1} inches. In the case of shells measuring 44°6 mm. the radula of vulgata (100°2 mm.) is more than double the length of that of depressa (44°6 mm.). In. the younger specimens the difference is just as marked. And if the length of the radule of the whole series is added up, the average length of a vulgata radula is found to be 63:6 mm., while that of 136 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. a depressa radula is 87°4 mm. Thesum of the whole of the differences in length in favour of vu/gata is, in the twenty-nine specimens of the series, 75°96 cm., or about 23 feet. Length Length of radula in Difference in of shell, vulgata. depressa. favour of vulgata, 58°8 84°2 70°0 14°2 oes 87:4 65°2 222, 55°6 89-0 47°8 41°2 54°0 81:0 46°2 34°8 52°4 76°2 Die 190 50°8 87°4 49°3 38°1 49°3 76:2 46°2 30°0 47°8 74:8 50°8 24:0 46°2 74:8 54°0 20°8 44°6 100°2 44°6 55°6 43°0 87°4 38°2 49°2 41°4 84°2 43°0 41°2 39°8 87°4 36°6 50°8 38°2 87°4 36°6 50°8 36°6 54°0 36°6 17°4 35°0 66°8 33°4 33°4 33°4 60°4 35°0 25°4 31°8 47°8 35°0 12°8 30°2 76°2 33°4 42°8 28°6 46°2 28°6 17°6 27:0 43°0 27:0 16°0 25:4 38°2 27:0 11-2 23°9 41:4 Pal 14°4 92-4 36°6 25°4 ie? 20°8 382 22, 16:0 19:2 38 °2 19:2 19°0 17°6 28°6 19 2 9°4 16°0 23°9 76 6°3 14°4 27:0 14°2 14°8 It must be remembered that the specimens examined are not specially selected in order to exhibit differences of length in the radula, They are simply, in each case, the first two specimens of equal length which happened to come to hand on a certain beach in South Devon. In the teeth of the radule themselves certain small differences appear. In both cases there are four uncini flanked on each side by laterals, the innermost of which is armed, and not in the same plane with the rest. In depressa the two interior uncini are much narrower than the two external, the hooks being mounted on narrower bases than in vudgata. This fact, which is observable in the nascent rows, becomes more marked as growth proceeds. In vulgata, on the other hand, the two interior uncini, although smaller than the other two, are not nearly so unequal to them in breadth. Further, the serrations of the interior lateral appear to be much more deeply cut in vulgata than in depressa. The sum of all these observations seems to tend decisively to the conclusion that in vulgata and depressa we have two quite distinct species of British limpets. It is my impression, which I have not yet had time to verify, that vulgata is a northern, depressa a southern 1 Measurements are in millimetres. COOKE: ON PATELLA VULGATA AND P. DEPRESSA. 137 form, and that while the northern limit of the distribution of vulgata is about the latitude of the Lofoden Islands, that of depressa is very much further south. It should be made clear that the statement of Forbes & Hanley— the two forms ‘‘ inhabit different levels, the vudgata being always in the higher zone ’’—does not represent the facts accurately. P. vulgata, as is well known, lives from near high-water mark to the extreme of low-water. LP. depressa, on the other hand, is seldom found till near low-water mark, where, so far as my experience goes, vulgata and depressa occur abundantly on the same masses of rock. ‘This fact further strengthens the case for their specific difference. *,* Since the foregoing paper was read, our Editor informs me that it is stated in Woodward’s Manual, 1st ed., p. 451, that ‘*‘ Mr. Wilton has ascertained that Patella athletica may be distinguished from the common limpet of our coast by its teeth”’. He further tells me that in his uncle’s interleaved working copy of the Manual, now in his possession, he finds the following manuscript note: ‘‘ Patella athletica: dental canal not much longer than the shell (scarcely half as long as in P. vulgata): teeth closer together than in P. vulgata; more massive and with shorter cusps; the difference is greater in the imperfectly developed teeth near the further extremity of the canal.” 138 NOTE ON THE TYPE-SPECIMEN OF CRIOCERATITES BOWERBANKII, J. DE C. SOWERBY.! By G. C. Crick, F.G.S., F.Z.S. Read 12th January, 1917. PLATE VII. Tue type-specimen of Crioceratites bowerbankii, formerly in the Bowerbank Collection, now forms part of the British Museum collection [ Brit. Mus. No. 46474]. The present writer’s attention was directed to it recently in connexion with the description? of an ammonoid, Ammonitoceras tovilense, from the Lower Greensand ( Aptian) of Kent, and two or three features about the specimen that had not hitherto been recorded seem to deserve notice. Sowerby’s*® description of the fossil was communicated to the Geological Society of London in a letter which was read on March 8th, 1837. In his letter Sowerby writes: ‘‘'The recent discovery in the Isle of Wight, by Mr. Bowerbank, of a fossil shell resembling Ammonites, but differing essentially from that genus, and of a magnificent Scaphites, appears to me of sufficient importance to be laid before the Geological Society; I have, therefore, drawn up the following descriptions, accompanied by reduced figures of the fossils. ply sexxiv.” His description of Crioceratites bowerbankit is as follows: ‘‘ The gigantic species from the Isle of Wight I shall name, after its discoverer, Crioceratites bowerbankit, pl. xxxvi, fig. 1. Spec. Char.— Whorls about four, slightly flattened on their sides, and nearly close ; the inner one ornamented with numerous radiating furrows, which, gradually disappearing upon the outer whorl, are replaced by eight or ten thick, arched cost, extending completely across the whorl, and largest and most elevated towards the thinly edged, transversely oblong aperture. ‘‘The septa are rather distant, terminating where the coste begin to enlarge. There is generally a short rib almost close to the aperture, and in one specimen I have noticed an additional short rib between the two long ones which precede the termination. In an individual sixteen inches wide, the septa are one inch and a half apart. ‘The fossil occurs in the lower green sand on the south coast of the Isle of Wight.” The type-specimen is very well represented in Sowerby’s figure, the enormous enlargement of the ribs on the body-chamber being well shown. Of these ribs, and counting from the aperture, the two largest are the third and fifth, the fourth is a trifle 1 Published by permission of the Trustees of the British Museum (Nat. Hist.). 2 G. C. Crick, Proc. Malac. Soc., vol. xii, November, 1916, pp. 118-20, pl. vi. * “*Tietter from Mr. James de Carle Sowerby to the Secretary, on the Genus Crioceratites and on Scaphites gigas’’: Trans. Geol. Soc. London, ser. I, vol. iv, p. 409, pl. xxxiv. beg’ bib ‘LHOIM SAO'l*ONVSN3SZYSD YIMOT ‘AGYSMOS'O 3ZQ'Pk'NYNVBYAMOG SALILVHYBOOIYO TIA Td ITX TOA ‘DOS '‘OVIVW 20Hg CRICK: ON CRIOCERATITES BOWERBANKII. 139 thicker but not quite so prominent. The last two, however, show a considerable diminution in size. About 40mm. in front of the last complete rib there is another obscure rib, most apparent near the periphery, and about 20 mm. in front of this a portion of the peristome is visible. The peristome was plain, and in the fossil, which it must be remembered is an internal cast, there are several fairly-coarse lines of growth immediately posterior and parallel to it. Not only are the ornaments much more feeble, but the body- — chamber itself is very much reduced in front of the third (counting from the aperture) large rib. True the (morphological) left side of the fossil is abraded, but the fossil does not appear here to be either distorted or crushed. This condition of the anterior end of the body- chamber is evidently a senile character and indicates the extremely feeble condition of the animal and its approaching death. Although the rough surface of the specimen, which is an internal cast, is not favourable for the preservation of delicate lines, there is what appears to be an obscure indication of one of the muscle-scars. When complete the scar seems to have been an oval area truncated posteriorly, approximately 45mm. long and 40mm. wide, but only its anterior and inner boundaries are preserved as an obscure impressed line. Commencing on the umbilical margin at a point half-way between the sixth and seventh (counting from the aperture) ribs the line passes forward and inward over the margin to within about 30 mm. of the suture of the shell, it then curves backward still passing inward until at about 28 mm. from its most anterior part it is only 10mm. from the suture of the shell, then curving slowly outward it can be traced nearly as far as the last septal-suture. EXPLANATION OF PLATE VII. Crioceratites bowerbanku, J. de C. Sowerby, from the Lower Greensand, Aptian, Isle of Wight. Type-specimen. British Museum Collection, register number 46474. Fic. 1.—Lateral aspect, showing the rapid decrease in size of the anterior part of the body-chamber. The body-chamber commences immediately above the left-hand edge of the scale. m.sc. anterior boundary of muscle-scar. 5, 2.—Peripheral view, showing the enormously-enlarged ribs on the body- chamber. >, 3.—Apertural view (with the aperture turned slightly to the right), showing the rapid decrease in size of the anterior part of the body- chamber and (i.sc.) the boundary of the muscle-sear. (In each figure the scale represents 4 inches = 10°15 cm.) VOL. XII.—APRIL, 1917. i111 140 A REVISION OF THE TURRIDH (PLEUROTOMID) OCCURRING IN THE PERSIAN GULF, GULF OF OMAN, AND NORTH ARABIAN SEA, AS EVIDENCED MOSTLY THROUGH THE RESULTS OF DREDGINGS CARRIED OUT BY MR. F. W. TOWNSEND, 1898-1914. By James Cosmo Metvitt, M.A., D.Sc., F.L.S., ete. Read 8th December, 1916. PLATES VIII-X. Tur comprehensive study of the marine mollusean fauna of the Persian Gulf and its contiguous seas is of comparatively recent date, hardly any steps having been taken to classify or enumerate the members of the richest family occurring within that area, until 1875, when Messrs. Geoffrey and Hugh Nevill published an account of ‘“New Marine Mollusca from the Indian Ocean, mostly Pleuro- tomide’’.! In this treatise about twenty-five species are named, but many of them occur beyond our assigned limits. These were all well described, but only fairly figured on the whole. '‘I'wo years later, in 1877, Mr. Edgar Smith began his ‘‘ Diagnosis of new species of Pleurotomide”’ in the British Museum,’ and a series of papers followed, which were not completed till October, 1888. Very unfortunately, but owing to no fault of the author, who always spoke regretfully to me of the circumstances, none of them were figured. Over 160 species were diagnosed, and the types noted. During the past five or six years a few of them have been illustrated, either by Mr. C. Hedley * or myself,* but only a very few, and there can be no concealing of the fact that a great stumbling-block to the student has been occasioned by this omission. Many times I had discussed this question with Mr. Smith, and had resolved to delineate all that came from this particular province, from the actual types, and I find that thirty-five (or one-fifth of the total) of his species can be included. I therefore venture to offer now the three plates accompanying this paper, as some slight memorial of one to whom molluscan science owes so much, and whose unvarying kindness, attention, and readiness to assist in every possible way those who asked his advice and help, so endeared the name of Edgar Albert Smith to all. To discover these types I have been several times through the amassed stores of this family in the cases and drawers of the cabinets at the Museum, and only in two instances have I so far failed to find the objects of my search. 1 Journ. As. Soc. Bengal, vol. xliv, pt. ii, 1875, pp. 83-94, pls. vii-—viii. 2 Ann. Mag. Nat. Hist., ser. Iv, vol. xix, 1877, pp. 488-501; ser. Vv, vol. x, 1882, pp. 200-18, 296-306; ser. v, vol. xiv, 1884, pp. 317-29; ser. V, vol. xviii, 1888, pp. 300-17. : : > Mem. Austral. Mus., iv, pt. vi, 1903, p. 389. : 4 Proc. Zool. Soc. Lond., 1901, ii, pl. xxi, figs. 4, 14; Proc. Malac. Soc. ond: vols x, 1912" p.2ol ple xin U3, l38a- MELVILL: TURRID# OF THE PERSIAN GULF, ETC. 141 I may add that more than 180 species are treated of in this paper, and one-half of them have been described as new, mainly from Mr. Townsend’s collections. The typesare allin the British Museum. The Turride (Bolten’s name TZurris, 1798, antedating Lamarck’s Pleurotoma, 1799) are certainly among the most, if not the most, attractive of all the genera of marine mollusca, and at the same time the most difficult to classify properly. This fact really adds incentive to their study, coupled with their infinite variety of contour, the many rare and abysmal forms, and the certainty of additions occurring — to the family whenever new ground—or rather seas—are examined. Yet, so far, no student has made this one group his life-work. I am convinced that the fossil forms (mostly Tertiary) should be studied part passu with the recent, before any satisfactory headway towards the much-needed accurate classification can possibly be reached. Mr. 'I’. L. Casey’ has attempted this with some measure of success as regards the larger forms, both recent and fossil, though he has evidently mainly worked out the species of the last named in the United States far more completely than those of the Old World. He creates various new genera for the more pronounced species.of considerable size, but notes his inability ‘‘ after long and patient study of rather large material to devise a system of characters to serve for the definition of the subtribal groups” he includes under the collective term Daphnellini. For the sake of convenience, an alphabetical sequence has been adopted in the enumeration of all the following species under what I assume to be their proper genera, but I have endeavoured, in the remarks that accompany each, to name their most likely affinities. A large proportion of the forms from this region are endemic, so far as is known, and certain of them are very conspicuous for beauty of contour or coloration. In the first category might be placed such species as Zurris invicta, Mungilia Townsend, Clavatula navarchus, and Drillia tasconium; in the second, Drillia resplendens, D. persica var. jacintha, and Cythara hyperealles. Many Daphnelle and Pleuro- tomelle, the ten species of the latter not yet being known elsewhere, are of exquisite and most delicate design, pure white, and abysmal in distribution. It has been found necessary to institute a sub-genus (Diaugasma) for the curious Daphnella epicharta, M. & St., and another ( Veprecula) for a series of deep-water Clathurelle with nuclear and other peculiarities. Doubtless, as hinted by Mr. Casey, the vast genus Mangilia will be subdivided when the relations of the species are better known; indeed, I believe Mr. Iredale, to whom I am very greatly indebted for many useful hints in nomenclature, already has the matter in hand. It now only remains for me to thank also Mr. J. R. le Brockton Tomlin for considerable assistance; and Mr. R. Standen, with whom I collaborated in the first enumeration of this Family,’ as far as the 1 Trans. Acad. Sci. St. Louis, vol. xiv, 1904, pp. 123-70. ” Proc. Zool. Soc. Lond., 1901, pp. 327-460. 142 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Gulf was concerned; Mr. Townsend, as I have often had occasion to observe, in the care exercised in the preservation of the specimens collected, and in the labelling of exact localities, as well as in the selection of good dredging stations, exceeded most, if not all his forerunners, and to him I feel extremely grateful, now, as ever. Lastly, to Miss Gertrude M. Woodward I must express my especial gratitude for the admirable illustrations delineated with such consummate accuracy. ABBREVIATIONS EMPLOYED TO INDICATE REGIONS OF DISTRIBUTION. P.G. By these initials is to be understood the whole area of the Persian Gulf, likewise comprehending the Gulf of Oman, with Muscat and Jask, bordered eastward by long. 59° 48' E. M.C. The Mekran coast of South Persia and Baluchistan, between long. 59° 48’ KE. and the River Hab. I. The east coast of continental India from east of the River Hab, abutting on Karachi, say long. 66° 40', south-eastward to Panjim, lat. 15° 50’ N., long. 66° 40’ EK. Class GASTROPODA. Order PROSOBRANCHIATA. Sub-order MonorocaRrDIA. § TOXOGLOSSA. Family TURRIDAZ (=PLEUROTOMID£). I. Sub-family Tourrinm. Genus TURRIS, Bolten, 1798 (= PLEUROTOMA, Lamarck, 1799). 1. Turris acura (Perry). Pleurotoma acuta, Perry, Conchology, 1811, pl. liv, fig. 5. as tigrina, Lamarck, Anim. sans Vert., vol. vii, 1822, p. 95. + 5 Deshayes, Anim. sans Vert., 2nd ed., vol. ix, 1843, p- 302. of o Kiener, Coq. Viv., 1839, pl. viii, f. 1. aA Reeve, Conch. Icon., vol. i, 1843, pl. i, f. 3. e - Hedley, Proc. Linn. Soc. New South Wales, 1902, p. 28. Lvphiotoma ,, Casey, Trans. Acad. Sci. St. Louis, vol. xiv, 1904, p. 180. P.G. Gulf of Oman, Malcolm Inlet, at 24 fathoms, dead. M.C. On soft mud, at 7 fathoms, but very scarce. A widely distributed and not very variable species, extending to the Philippine Isles,! where it abounds, and also Fiji and other islands of the Eastern tropical Archipelago. See remarks under T. indica. 1 Hidalgo, Cat. Moll. Test. Ins. Philip., 1904, p. 112. MELVILL: TURRIDZ OF THE PERSIAN GULF, ETC. 143 2. Tourris arpina (Lam.). Pleurotoma albina, Lamarck, Anim. sans Vert., vol. vii, 1822, p. 96. * Reeve, Conch. Teon:, vol. 7, 1843; pl. ix, £..77. P. G. Gulf of Oman. Off Muscat, 30 fathoms. teat. 18> 43) N long. 71°41" E. Reeve remarks upon the ‘‘ squareness and equidistant arrangement of the spots which ornament the flattened keel formed by the filling up of the labral slit”. The figured specimen was dredged by Surgeon R. Brinsley Hinds, R.N., in the Island of Cerat, Moluccas. 3. Turris mnpica, Bolt. Turris indica, Bolten, Mus. Boltenianum, 1798, p. 124, No. 1594. Pleurotoma marmorata, Lamarck, Anim. sans Vert., vol. vii, 1822, p. 9d. », Reeve, Conch. Icon., vol.i, 1843, pl. iii, f. 21, a, d. Lophiotoma marmorata, Casey, Trans. Acad. Sci. St. Louis, vol. xiv, 1904, p. 130. P.G. Thairi, Mussandam, east side, 30 fathoms (1912). Malcolm Inlet (Kubbatt Ghazira), giant example, long. 94 mm., dredged at 55 fathoms. From this latter place a shell was procured that may prove a hybrid indica & acuta. M.C. Not uncommon, often washed ashore. I. Bombay. A variable species, extreme forms being happily figured by Reeve. Distributed over the Eastern 'l'ropics very widely, ranging from the Red Sea to Australia and Polynesia, and as far north as Japan, I do not agree with Tryon (Man. Conch., vol. vi, 1884, p. 165) that hastula, Reeve (Conch. Icon., vol. i, 1843, pl. xvii, f. 139), is the young of this species. From the Cargados Isles came interesting albino specimens (Stanley Gardiner Expedition).1 These are probably the PJ. buelowi, Sowb., and have the appearance of having been dredged at a considerable depth. I may add that for this species and acuta, Bolt. (as well as leucotropis, Ad. & Ryvye., srekeli, Weink., unedo, Vil., and virgo, Lam.), Dr. Thomas L. Casey proposed a new genus, Lophiotoma, laying stress upon the stouter form, abbreviate, with straighter beak, more acutely elevated and less close-set spiral carina, and with deep anal sinus formed centrally ov, and not behind, the peripheral keel, the latter being more strongly elevated and usually sub-duplex. Possessing all these species, I have closely compared their structure with those few still allowed a place in the typical genus Turris, the result being that I prefer to consider them all so closely allied that it seems disadvantageous to separate them even subgenerically. ‘The nepionic whorls are confessedly identical; it is simply a question of the carine being more pronounced in such a species as acuta, for instance; the same character of marking or painting is to be found, and to a great extent the same build and contour generally. 1 Trans. Linn. Soc. Lond., ser. 11, Zoology, vol. xiii, 1909, p. 118. 144 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 4. Turris rnvicra, Melv. Turris invicta, Melvill, Ann. Mag. Nat. Hist., ser. vii, vol. vi, 1910, p: (5,91. tte 27.. P.G. Telegraph cable at 29 fathoms. September 2,1906. Bushire, Hinderabi Island, Gulf of Oman, 55 fathoms. Several. One, especially large and fine, measures long. 90 xX lat. 32mm. Allied to indica, it preserves its individuality in all specimens found, especially as regards its remarkably abbreviate contour. So far as is at present known, it is endemic. This would be included in Dr. Casey’s genus Lophiotoma, to which I referred under 7. indica. § Subgen. GEMMULA, Weinkauff, 1876. 5. Turris (GEMMULA) CONGENER (Sm.). Pleurotoma congener, K. A. Smith, Ann. Mag. Nat. Hist., ser. v1, vol. xiv, 1894, p. 160; pl: imi, £4, 5. P.G. Gulf of Oman (Jnvestigator Expedition), lat. 238° 47’ N., long. 58° 30’ E., 230 fathoms. This fine species was originally dredged by the same expedition in the Bay of Bengal, and subsequently west of Travancore at 102 fathoms, also west of the Malabar Coast at 295-360 fathoms, from mud and sand. Wehad hoped to have found it among Mr. Townsend’s collections. Many other large abysmal species were found by the IJn- vestigator, but mostly in the Bay of Bengal, or off Ceylon, and the Malabar Coast, outside our limits. Most, if not all of them, have been figured by Messrs. Alcock, Annandale, MacGilchrist, and others in the Lllustrations of the Zoology of the Royal Indian Marine Survey Ship “ Investigator ’’. 6. Turris (Gemmora) cemmata (Hinds). Pleurotoma gemmata, Hinds, Proc. Zool. Soc. Lond., 1843, p. 37. a x Reeve, Conch. Icon., vol. i, 18438, pl. x, f. 83. ) fusca, Hombron & Jacquinot, Voy. Sud. Pol. Zool., vol. v, 1850, p. 3, pl. xxv, f. 19-20. P.G. Gulf of Oman, lat. 24° 5’ N., long. 57° 35’ E., 205 fathoms, sand, abundant, none full grown. Also lat. 24° 58’ N., long. 54° 56’ E., 156 fathoms, equally common, and at two contiguous dredgings at 37 and 225 fathoms respectively, in sand and mud. A dark form occurs off Muscat at 20-40 fathoms. M.C. Off Charbar, 40 fathoms. P. fusca, H. & J., we consider synonymous; the dark form mentioned above might be considered a colour variety for which the name fusca would be congenial. Few of our examples are full grown; it is evidently an abysmal species. The distribution is extended over the eastern tropics from the Red Sea to Australia. It does not, however, occur in Hidalgo’s Philippine Catalogue. Hedley, in his Queensland List, separates “« Pleurotoma”’ gemmata, Hinds, and ‘‘ Drillia”’ fusca, H. & J., and MELVILL: TURRIDEH OF THE PERSIAN GULF, ETC. 145 classes them accordingly in these two genera, but I cannot say I agree with this proposal. 7. Torris (Gemmura) eitcuristi (Sowb.). Pleurotoma gilchristi, G. B. Sowerby, ‘‘ Marine Investigations in S. Africa,” Cape Town, 1902, p. 99, fig. M.C. Off Ras Maidani between Jask and Charbar, at 180 fathoms, 1914, occurs what appears to be this species, the type of which came_ from Natal. It isnearly allied to P. ceylonica, Sm., of which I have an example from the Hugh Nevill Collection. ‘The tubercles, however, are smaller and more compact in gilchristi, and it is much less in latitude, proportionately, than the var. guadurensis of Z. granosa, Helb. (=carinata, Gray). 8. Turris (Gemmura) eranosa (Helb.). Murex (Fusus) granosus, Helbling, Abhandl. Priv. Bohm. Math. Prac, Bd. iv, 1779) p- 116, pl. nu; f. 16: a Dall, Journ. of Conch., vol. “ll; 1906, p: 291: Pleurotoma car inata, Gray, Griffiths’ Cuvier Anti. Kingdom, vol. xy 1834, pl. xxiii. 9 5» Reeve, Conch. Icon., vol. i, 1843, pl. vii, f. 56. a kvenert, Doumet, Mag. de Ficoll. 1840, Moll. > pl. x. P.G. Fahal, 20-40 fathoms; Mussandam, 30 fathoms, 1912: Gulf of Oman, Muscat, 25-40 fathoms. Var. guadurensis, nov. Testa ut in typo, sed omnino minor, fere immaculata. M.C. Gwaditr, one specimen at 70 fathoms. A few others, all much of the same calibre, off Ras Maidani, between Gwadtr and Jask, The sculpture of this variety is identical with the type; the size about one-half, say 38 mm. as against 60-70 mm., the coloration most simple, nearly immaculate. 9. Turris (GemmuLa) MuLTIseRIaTA (Sm.). (Pl. VIII, Fig. 3.) Pleurotoma multiseriata, KE. A. Smith, Ann. Mag. Nat. Hist., ser. rv, Voluxix, 187 /..p; 491. P.G. Koweit, 10 fathoms. M.C. In many places, 5-20 fathoms, mud bottom. I. Twelve miles west of Karachi, on the border of the Mekran coast, at 15 fathoms. Very large examples occurring in this locality, measuring 2 inch. Captain Tindall of the S.S. Patrick Stewart likewise procured it at Batticaloa, south of our limit. We follow Paetel! in assigning this shell to the section Gemmu/a, but it stands somewhat alone in the assemblage, resembling in extreme miniature such a large deep-water form as congener, Sm. It is distinguished by the double row of tubercles, spirally running below 1 Paetel, Cat. de Conchyl. Samml., 1887, p. 67. 146 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. the sutures, and the many close longitudinal lire or costule descending obliquely. ‘he colour varies from reddish brown to full ochreous, the latter colour predominant. There are specimens in the National Collection from Ceylon, the Persian Gulf, and China seas. The original type is now figured. § Subgen. TOMOPLEURA, Casey, 1904. 10. Tureis (TomopLevrA) acuriceMMaTA (Sm.). (Pl. VIII, Fig. 1.) Pleurotoma acutigemmata, EK. A. Smith, Ann. Mag. Nat. Hist., ser. 1v, vol. xix, 1877, p. 489. P.G. Gulf of Oman, Muscat, 20-40 fathoms. I. Lat. 18° 58’ N., long. 71° 45’ E., 40 fathoms. The locality of the type, now figured for the first time, is unknown. In my opinion, this may stand as distinct from jubata, Hinds, to which, however, it is very nearly allied. ‘The author lays stress on the form being narrower, tubercles larger, and canal more abbreviate. It is merged by Tryon (Man. Conch., vi, pp. 171, 172) with Hinds’ species, but this evidently only on surmise, since he had never beheld acutigemmata. We have it also from the Andaman Islands (Booley).! Tomopleura, Casey,*? was instituted as a genus, while Gemmuda, Weink., has been also raised to the same rank. I prefer treating both as sub-genera for the present. 11. Torrts (Tomopievra) crrcumvertENS (Melv. & Stand.). Drillia circumvertens, Melvill & Standen, Proc. Zool. Soc. Lond., 1901; p: 436, pla xxi, devo: P.G. Gulf of Oman, lat. 24° 49’ N., long. 51° 56’ E., 225 fathoms, mud; and lat. 24° 58 N., long. 56° 54’ E., 156 fathoms. A small white species, of peculiar sculpture. The two uppermost nuclear whorls are smooth, globular, and shining, the two succeeding, longitudinally nodulously costate, the rest pronouncedly excavate at the sutures, a strong carina or keel just below, on each whorl, and another just above the sutures, the intermediate space smooth with crescent-shaped striation, the lower keel is the strongest, canal only shghtly produced, spiral lire running below the periphery to the base, twelve or thirteen in number. Long. 6, lat. 2°25 mm. 12. Turris (TomopLevra) Facina (Ad. & Rve.). Pleurotoma fagina, Adams & Reeve, Voy. Samarang, Moll., pt. 2, 1850, p. 40, pl. ix, f. 2, ad. “i », cLryon, Man. Conch., vol. vi, 1884, p. 167, pl. iii, f, 22. P.G. Henjam Island, 46 fathoms, sand. A large species, dark brown, with regular spiral ribs. Only one specimen dredged. The type camefrom China. It may be considered one of the rarer species. 1 Casey, Trans. Acad. Sci. St. Louis, vol. xiv, 1904, p. 138. 2 Proc. Malac. Soc. Lond., vol. ii, 1897, p. 165. MELVILL: TURRID#® OF THE PERSIAN GULF, ETC. 147 Pl. annulata, Reeve, Conch. Icon., vol. i, pl. v, f. 35, of unknown locality, seems near akin. 13. Turris (Tomorrrvra) nivea (Phil.). Pleurotoma nivea, R. A. Philippi, Zeitschr. f. Malak., 1851, p. 92. I. Karachi, 3-7 fathoms, loose stones, and muddy sand. Originally described from Formosa, Judging by the Indian examples, this hardly differs from the variety violacea (Hinds), excepting in the pure-white coloration, all the violacea I have seen being most delicately tinted the palest lilac. (a) Var. violacea, Hinds. Pleurotoma violacea, R. B. Hinds, Moll. Voy. Sulphur, 1844, p. 16, pli v3 2. 8: 5 Reeve, Canch. Tcon., vol. i, 1843, pl. xxii, f. 186. Vee G. Basadu, Kishm Island, and iehor Kaede I. Karachi. Inside the harbour in 8-7 fathoms, loose stones and mud. It is reported to range from the Red Sea to Japan, Philippine Isles, and Australia. The type figured by Reeve came from the north coast of New Guinea and Macassar Straits, 7-22 fathoms. It is therefore in all probability widely distributed over the whole eastern tropics. Jam sorry it cannot be taken as the more typical form; but the name had been previously employed, by Mighels and C. B. Adams, so was rendered untenable. 7. nivea proper is, in my opinion, only the same shell without the pale lilac tint. (b) Var. makemonos, Jouss. Pleurotoma makemonos, F. Jousseaume, Bull. Soc. Zool. France, 1883, pe 198, pl;x, it. 4. 5 * Tryon, Man. Conch., vol. vi, 1884, p. 319, pl xocxty, 1. 10: P.G. Gulf of Oman, Jask Beach. Originally described from Aden, this variety merges on the one hand into the type, and on the other approximates pouloensis, Jouss. This latter, however, is a stouter shell, of a uniform dun colour, but, notwithstanding this, it is probably only another variety of nivea. Pl. makemonos is known by its pale-brown hue, with longitudinal patches of a darker shade crossing it at intervals. It is also reported from Japan. (c) Var. pouloensis, Jouss. Pleurotoma pouloensis, F. Jousseaume, Bull. Soc. Zool. France, 1883, p. 199. 5 i Tryon, Man. Conch., vol. vi, p. 319, pl. xxxiv, fel, P.G. Shaikh Shuaib Island. M.C. Charbar. I. Karachi. 148 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. Usually in 3-5 fathoms, amongst loose stones and muddy sand. Described originally from Malacca. Although the two last, here considered varieties, can usually be recognized, I fail, after having examined many examples from the Arabian Sea and Persian Gulf, to be able to draw a hard and fast line between them. 7° pouloensis is the most incrassate of the series, and the coarsest in build, the typical volacea being a graceful, attenuate shell, with slightly more produced canal, 14. Turris (Tomoptevra) patricia (Melv.). Pleurotoma patricia, Melvill, Proc. Malac. Soe. Lond., vol. vi, 1904, p; 164, nl. x,t. 1a, P.G. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 156 fathoms, 1903; lat. 25° 63’ N., long. 60° 39’ E., 90 fathoms, 1914. M.C. Astola Island, Charbar, 40 fathoms. The tumid, longitudinally ribbed, and shining third and fourth whorls of this charming little species characterize it specially. In good condition the shellis tinged with pale violet. I possess examples of Pl. loprestiana, Caleara, from Adventure Bank (Porcupine Expedition), which show slight affinity, but are quite distinct in form, the effect of the tumid whorls just mentioned being to give patricia a somewhat dolioform contour. It appears to be widely distributed over the Gulf area, but is sparse in individuals. 15. ? Turris (Tomoprrvra) THISBE (Melv.). ? Drillia Thisbe, Melvill, Proc. Malae. Soc. Lond., vol. vii, 1906, Pp. %, pl. vill, 1.120. P.G. Persian Gulf, Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 156 fathoms. A small white shell, with mouth decidedly buccinoid. Nearly all the specimens seen are imperfect as regards the nuclear whorls. The shell is closely, spirally ridged. here are many differences of opinion among those I have consulted as to the proper status of this species, which may be the young of a Zritonidea or allied genus. At the same time it seems to possess some Pleurotomoid characters, but, until better material is obtained, I fear no quite satisfactory conclusions can be drawn. Judging by the figure, it resembles in form, shape of aperture, and general sculpture, Daphnella (Teres) mimica, Sowb.,'’ from St. Vincent’s Gulf, South Australia. 16. Turrts (TomorLevRA) tTRypanopEs (Mely.). Pleurotoma trypanodes, Melvill, Proc. Malac. Soc. Lond., vol. vi, 1904, Bao, ple v4: 12. P.G. Henjam Island, 1906. Arabian Sea, lat. 18° 58’ N., long. 71° 45’ E., 40 fathoms. I. On cable, 100 miles west of Bombay, 1906. 1 Proc. Malac. Soc. Lond., vol. ii, 1896, p. 27, pl. iii, f. 10. MELVILL: TURRIDZ OF THE PERSIAN GULF, ETC. 149 An elegant tornate species, with produced canal, and spiral ribbing somewhat similar to that of Pl. nivea, Phil., but more regular. White, tinted yellowish around the upper double carine of each whorl; just below the sutures these carine are spirally deeply punctulate, an item omitted in the original description. These additional notes are taken from the specimen noted as from the cable, west of Bombay. The dimensions of this are long. 20, lat.6mm. As regards the nuclear whorls, the first two are vitreous, globular, smooth, and shining, the two next, also vitreous, but spirally nodulous. 17. Turris (TomopLevra) vERTEBRATA (Sm.). (PI. VIII, Fig. 4.) Pleurotoma vertebrata, E, A. Smith, Ann. Mag. Nat. Hist., ser. rv, xv, 1875, p. 416, violacea, Hinds?, Tryon, Man. Conch., vol. vi, 1884, p. 170, pl. iii, f. 29, 29a. I. Karachi, Ratnagiri, south of Bombay (Abercrombie). Also received from Oshima, Japan (Hirase). This may, perhaps, stand on its own merits, as distinct from violacea, Hinds, with which several authors have placed it. It differs in size, also in less prominent spiral ribbing, the characteristics of which, however, are almost identical, and, above all, the chestnut zigzag longitudinal markings down the whorls, the same colour permeating the sutural region in more or less density. My largest example only measures 17mm. in length, while nvea attains 25 mm. or more. I have lately received characteristic Japanese specimens, collected by Hirase. The chestnut painting is distinct and peculiar, in zigzag longitudinal flames on white ground. ” Genus ANCISTROSYRINX, Dall, 1881. 18. ANCISTROSYRINX ORIENTIS, Mely. Aneistrosyring orventis, Melvill, Proc. Malac. Soc. Lond., vol. vi, 1904, p. 56, pl. v, f. 3. P.G. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 156 fathoms. In my description of this species I omitted to mention that A. travaneortea, Smith, a very fine and large abysmal species, of ornate sculpture, had already been recorded from the Eastern tropical area, some way south of our limit. Mr. T. L. Casey,! following Cossmann’s dictum, considers Ancistrosyrinz, Dall, preoccupied by Cochlespira, Conrad. Tryon, however, thinks the last = Plewrotoma, Lamk. (i.e. Zurris, Bolt.). DRILLIA, Gray, 1838. 19. Dritiia atcyongEA, Melv. & St. Drillia aleyonea, Melvill & Standen, Proc. Zool. Soc. Lond., 1901, p. 435, pl. xxii, f. 21. P.G. Gulf of Oman, lat. 24° 55’N., long. 57° 59’ E., 37 fathoms, sand and mud. 1 Trans. Acad. Sci. St. Louis, vol. xiv, 1904, p. 144. 150 PROCEKDINGS OF THE MALACOLOGICAL SOCIETY. This species has not been found since by Mr. Townsend. It is a small (long. 12 mm.) shining white shell, superficially fasciolarioid. 20. Drintra anerrasensis, Melv. Drillia angriasensis, Melvill, Mem. Manch. L. & P. Soc., vol. xlii, INios.45 1898, pl, plats a: I. Angrias Bank, west of Bombay (Captain Tindall). A white, smooth shell, with nodulous angled whorls, and almost plain last whorl, lip effuse, base sub-truncate. The type, in the British Museum, Natural History, is still unique. 21. Dritira atuyrma, Melv. & St. Drillia athyrma, Melvill & Standen, Proc. Zool. Soe. Lond., 1901, p. 436; pl. xxiist. 22; P.G. Gulf of Oman, lat. 24° 58’ N., long. 57° 59’ E., 37 fathoms, sand and mud. Also at 142 fathoms, off Ras Maidani. The examples subsequently secured are more mature than was the original type. The outer lip in the Ras Maidani examples is lobed, somewhat after the manner of Plewrotoma lobata, Sowerby.’ The largest example, unfortunately with imperfect outer lip, measures longi- tudinally 26 mm., is whitish, the spiral raised ridge just below the suture of each whorl is pronounced, with ribs thick, straight, and somewhat oblique on the last whorl only. In a smaller, and more perfect specimen, the labral lobe projects almost at right angles to the slightly produced canal. he aperture is milky-white within, whorls in young specimens very closely spirally striate, slight chestnut maculations very sparsely cover the surface in certain examples, in others the coloration is simple, dead white or palest ochreous. 22. Dritiia aupax, Melv. & St. Drillia audaz, Melvill & Standen, Ann. Mag. Nat. Hist., ser. vit, vols xii, 1903..pacle, plyxcxiit i. P.G. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 156 fathoms. A distinct species, both in sculpture and painting. It has not been noticed elsewhere in the Persian Gulf region save in the particularly productive dredging mentioned above. It, however, is of fairly wide distribution, evidenced by its occurrence in the Savu Sea, East Indies (Szboga Expedition).* 23. Drittia Baynoami (Sm.). (Pl. VIII, Fig. 9.) Pleurotoma (Drillia) baynhami, BE. A. Smith, Proc. Zool. Soc., 1891, p. 404, pl. xxxiii,-f.2. P.G. Gulf of Oman, Muscat, 15 fathoms. I. Karachi. This seems very nearly allied, if not identical, with Drillva suturalis, 1 Marine Investig. South Africa, vol. ii, 1903, p. 213, pl. iv, f. 9. 2 M. M. Schepman, Prosobr. Siboga Exped., 1913, p. 414. MELVILL: TURRIDH OF THE PERSIAN GULF, ETC. 151 Gray.! The type, of which we give a figure, is a pale shell, of refined sculpture, tinted with pale brown. Most of the numerous specimens we have placed under this name seem best included under intertincta, Sm., a species with more prolonged canal, and decided marking and coloration, especially interstitially. The type came from Aden. 24. Dritita cEeccuHi, Jouss. Drillia cecchi, Jousseaume, Le Naturaliste, 1891, p. 282. P.G. Henjam Island (1906), Gulf of Oman, Jask. M.C. Local at 8-80 fathoms, muddy sand. A pure-white species, which seems constant in its somewhat critical characters. The type came from Aden, and it has since been again collected there by Commander E, R. Shopland.* Near to D. theoreta, Melv., which is a highly coloured species, with more abbreviate canal. 25. Driuiia cHIMAsTRUM, sp. nov. (PI. X, Fig. 11.) D. testa compacta, fusiformi, solidula, nivea, unicolorata, anfractibus in specimine maximo ad 11, tribus supernis planiusculis, lacteo- vitreis, cxteris ventricosulis, ad suturas impressis, longitudinaliter costatis, costis incrassatis, anfractus ultimi numero tredecim, undique spiraliter regulariter liratis, apertura breviter ovata, intus alba, sinu lato, canali paullum producto, margine columellari fere recto. (xe¢uaozpov, winter apparel, from the snowy-white colour.) Long. 16, lat. 6 sp. max. P.G. Mussandam, 30 fathoms. Malcolm Inlet, 85 fathoms. Gulf of Oman, Diamanayat Isles, 20 fathoms (15 April, 1912). A pure-white, somewhat compressed and compact species, the whorls ventricose, compressed suturally, longitudinally ribbed, ribs straight, incrassate, crossed throughout by spiral filose lire, mouth subovate, sinus distinct, broadened, columellar margin almost straight. It seems near to putillus, Reeve, and perhaps spectrum of the same author, but is a far more solid species than the last-named. 26. Dritira clyponta, Melv. & St. Drillia clydonia, Melvill & Standen, Proc. Zool. Soc. Lond., 1901, Patol, ple xxi, f. 24" P.G. Henjam Island, 1906. Muscat, 20-35 fathoms, 1914. Gulf of Oman, lat. 24° 49’ N., long. 57° 56’ E., 225 fathoms, mud. A pretty species, not variable, with obliquely flexuose longitudinal ribs, surface either whitish, stramineous, or slightly rufous, shining, canal slightly produced; most nearly allied to D. omanensts, M. & St. 27. DRiitra CcRENULARIS (Lam.). Pleurotoma crenularis, Lamarck, Anim. sans Vert., vol. vii, 1822, p. 92. 3 5 Reeve, Conch. Icon., vol. i, 1843, pl. vii, f. 54. For localities see under variety A. 1 Ann. Nat. Hist. (Charlesworth), vol. i, 1838, p. 29. 2 Proc. Malac. Soc. Lond., vol. v, 1902, p. 172. 152 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. (a) Var. atkinsonit, Sm. (Pl. VIII, Fig. 7.) Pleurotoma (Drillia) atkinsonit, BE. A. Smith, Ann. Mag. Nat. Hist., ser. Iv, vol. xix, 1877, p. 495. P.G. Muscat, 25 fathoms. M.C. Rarely, at 10-12 fathoms. I. Bombay, where it appears the prevailing form, though the type has also been recorded (Abercrombie). Lieut.-Col. H. D. Olivier has also collected the typical erenularis at Bassein, near Bombay. Karachi (Townsend), both the type and the variety. (6) Var. griffithii, Gray. Pleurotoma griffith, J. E. Gray MSS., Reeve, Conch. Icon., vol. i, 1843, pl. vu, f. 57. P.G. Gulf of Oman, Jask, on hard sand. Muscat, 10-85 fathoms. M.C. Charbar, at low spring tides. I. Karachi, specimens washed up all along the coast. I expect when all the forms allied to erenularis (and by this is meant baynhami, Sm., intertincta, Sm., major, Gray, etc., mostly separable by coloration, or some other peculiarity liable to vary) are studied really closely, that they will be found hardly worthy of separate specific rank, 28. Dritia pives, Melv. & St. Drillia dives, Melvill & Standen, Ann. Mag. Nat. Hist., ser. vu, vol Ki 1903 pool L. pli oexin f. 1S; P.G. Gulf of Oman, Muscat, 25 fathoms. In the original description this is represented as being allied to D. eclydonia. I now think D. philotima its nearest ally. The latter, however, has far more frequent longitudinal coste, and the mouth is narrower. 29. Drintra EUcHROEs, Melv. Drillia euchroés, Melvill, Proc. Malac. Soc. Lond., vol. x, 1912, p- 250, plexi, FIT. P.G. On the Telegraph Cable, September 2, 1906. A most distinct species, latiroid superficially, the sinus being very obscure, and the painting of spiral ochreous lines alternating with white and darker stramineous, somewhat resembling Latirus turritus, Gmel., or a miniature Fasciolaria filamentosa, Mart. It has occurred but very rarely. 30. Drirrra FLaviputa (Lam.). Pleurotoma flavidula, Lamarck, Anim. sans Vert., vol. vii, 1822, p. 92. :. Reeve, Conch. Icon., vol. i, 1843, pl. viii, £. 66. P: G. Koweit, 7 fathoms. Shaikh Shuaib Island, 36 fathoms (1906). Gulf of Oman, Jask, 175 fathoms (1912). Maleolm Inlet (Kubbatt Ghazira), very uncommon at 24 fathoms. A species of bold contour, particularly abundant in Erythrean waters. The Jask specimens are fine and large, often covered with Malluvium lissum (Sm.), one of the Calyptreeide, peculiar to these MELVILL: TURRID® OF THE PERSIAN GULF, ETC. 153. seas and a deep-water form. The distribution of D. flavidulais wide, including Hong-Kong and China proper. But the largest example in my collection is from the northern shore of the Red Sea, that was picked up on a sandy beach many years ago by my cousin, the late Miss Mary Alexina Haldane, and kindly presented to me. This is about 2}inches in length (say 68 mm.), pale straw coloured throughout, and in perfect condition. With this species I am inclined also to place Pl. (Drillia). latisinuata’ of Smith. I possess a co-type of this “ex auctore”’, and at the suggestion of Mr. Le Brockton Tomlin, have well compared it with a large and variable series of flavidula in my _ collection. Mr. Smith admits the near alliance of the two species, and lays stress on ‘‘the upper half of each whorl being nearly smooth, as_ the plications extend scarcely beyond the central large spiral liration which marks the angulations of the whorls’. This may be true as regards the type, but there are several intermediates, and I think we may consider flavidula as a protean species, and what may be called the form /atisinuata does likewise occur in the Persian Gulf. ol. Driiita GRANATELLA, M. & St. Driilia granatella, Melvill & Standen, Ann. Mag. Nat. Hist., ser. vi, vol, xii, 1903) p.812, pl: xxi, £18. P.G. Gulf of Oman, Muscat, 15 fathoms. A very pretty little form, pomegranate pink in colour, whence the specificname. Allied to persica, Sm., but characteristic and peculiar. 32. Dritira rncerTa (Sm.). (Pl. VIII, Fig. 5.) Pleurotoma (Drillia) incerta, E. A. Smith, Ann. Mag. Nat. Hist., Ser, iv, vol. xix, 1877, -p. 496: P.G. Henjam Island, 10-14 fathoms (1906). Gulf of Oman, lat. 24° 55’ N., long. 57° 59’ EK., 205 fathoms, sand. Also in contiguous sounding, at 37 fathoms, sand and mud. A species of somewhat uncertain status, and therefore well named. The prolonged canal serves slightly to distinguish it, and its pale, colourless whorls; the sinus, too, is remarkably patent, but it is not easy to characterize its qualities for purpose of differentiation. We would refer to the author’s description. The type now figured came from New Guinea. But few examples have been yet found in the Persian Gulf area. D: yousseaumet, Mely., from Aden (Shopland), is to be compared with it. his last has not occurred, so far, elsewhere. 33. Drittia rnconstans (Sm.). (Pl. X, Fig. 1.) Pleurotoma (—?) inconstans, EB. A. Smith, Ann. Mag. Nat. Hist., ser. Iv, vol. xv, 1875, p. 417. P.G. Henjam Island, 14 fathoms. Shaikh Shuaib Island, Pasni, 40 fathoms. Gulf of Oman, lat. 24° 55’ N., long. 57° 09’ E., 37 fathoms, sand and mud. 1 Ann. Mag. Nat. Hist., ser. IV, vol. xix, 1877, p. 494. 154 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. I. Karachi. Angrias Bank and Malabar Coast (Captain Tindall), 5 fathoms. This is a plentiful species, and appears to be more ‘‘ inconstant”’ in colour than form. The hue varies from pale straw colour and almost white to chocolate-brown. Sometimes the tubercles, spirally arranged below the sutures, are shining white, the rest of the shell being darker, but this is a rare variety. So nearly akin is this species to certain forms of pyramidula, Reeve, that I expect they will be united some day, if not immediately. 34. Drittra inrertinera (Sm.). (Pl. VIII, Fig. 6.) Pleurotoma (Drillia) intertineta, K. A. Smith, Ann. Mag. Nat. Hist., ser. Iv, vol. xix, 1877, p. 497. P.G. Henjam Island, Muscat, 5-15 fathoms, sand or muddy bottom. Largest examples measure 1} inches in length. M.C. Extends along the Mekran coast past Charbar, almost to Gwadir. A handsome species, at one time rather confounded with baynhamit, Sm. It is still very abundant where found, and we have seen many specimens without much variety. The dark-brown blotches at the interstices are very conspicuous: the trivial name was imposed in recognition of this. The canal is somewhat produced, form more attenuate proportionately than most of itscongeners. It is mentioned by Hidalgo as occurring at the Island of Cebu, Philippines. 35. Dritiia wirHorta, Melv. & St. Drillia lithoria, Melvill & Standen, Ann. Mag. Nat. Hist., ser. vi, vol. xii, 1903, p. 313, pl. xxu, f. 20: P.G. Bahrein Islands, 6 fathoms, coral sand. A small nodulous species, of the same character as ¢nconstans, Sm., prunulum, Melv., radula, Hinds, but with the spiral nodules much fewer and larger in proportion. It is of very rare occurrence. $6. Dnmiua aocma, G. & H. Nev. (Pl. 1X, Figs 7) Drillia lueida, G. & H. Nevill, Journ. As. Soc. Beng., vol. xliv, pt. 11, 1875, p. 84, pl. viii, f. 15. Plevrotoma (Drillia) disjecta, K. A. Smith, Ann. Mag. Nat. Hist., ser. VI, vol. 11, 1888, p. 308. P.G. Henjam Island, 10 fathoms. Gulf of Oman, Muscat, 10 fathoms, muddy sand. The type of ducida is in the Indian Museum, Calcutta, and we, therefore, have not had an opportunity for comparing it with disjecta, but judging from the good figure, which is drawn on a considerably magnified scale, there can be little doubt that these are one and the selfsame species. We have figured the actual type of disjecta from the National Collection. Mr. Smith lays stress upon the upper ribs in this species being always nodulous, and thus being capable of being distinguished from the very nearly allied persica at sight. To my mind, nevertheless, these species are almost too near, and mainly MELVILL: TURRID# OF THE PERSIAN GULF, ETC. 155 out of regard to the memory of the author I still keep them distinct for the present. 37. DRILLIA MINDANENSIS, Sm. Drillia mindanensis, E. A. Smith, Ann. Mag. Nat. Hist., ser. rv, vol. xix, 18/7, p. 493. P.G. Investigator Expedition. One specimen dredged, according to the author! of the species, in all respects similar to the type from the Philippine Isles excepting that the spire is a little shorter. I have neither seen this nor can I find its exponent in the Museum. 38. Drittia nitens (Hinds). Clavatula nitens, R. B. Hinds, Moll. Voy. Sulphur, 1844, p. 20, pl. vi, Peelys Pleurotoma ,, Reeve, Conch. Icon., vol. i, 1845, pl. xxii, f. 189. Mangilia ,, ‘Tryon, Man. Conch., vol. vi, 1884, p. 253, pl. xx, f. 2. P.G. Dabai. Diamanayat Island, 20 fathoms. I. Lat. 18° 58’ N., long. 71° 45’ E., 40 fathoms. Our specimens are only half the size, longitudinally, of the fine shell figured by Reeve from New Guinea. The discoverer, R. B. Hinds, also found it plentiful in Celebes and at Malacca, from 7 to 22 fathoms. Our examples vary in body-colour from shining white to umber-brown. All are very shining, and, as Reeve remarks, it is ‘a characteristic and well-defined species”. It appears in Hedley’s Queensland list, and likewise in that of Hidalgo, from the Philippine Isles. 39. Drirrra opriquata (Reeve). Pleurotoma obliquata, Reeve, Proc. Zool. Soc. Lond., 1845, p. 115. 5 a Reeve, Conch. Icon., vol. i, 1845, pl. xxix, f. 262. Dritlia a Tryon, Man. Conch., vol. vi, 1884, p. 203, pl. xi, fd P.G. Henjam Island, at 10 fathoms (1906). M.C. Charbar, 10 fathoms. Local, but widely spread over the Mekran coast. I. Karachi, at 5 fathoms. Amongst loose stones, etc. The range of this species, distinguished by its heavy growth and few oblique ribs, extends from the Persian Gulf to Ceylon, Singapore, Malayana, and as far as Japan. It is a well-marked shell. This, and perhaps nitens also, might with propriety be transferred to Zy/lotia. 40. Dritira omanensis, Melv. & St. Drillia omanensis, Melvill & Standen, Proc. Zool. Soc. Lond., 1901, p. 438, pl. xxiv, f. 1. P.G. Gulf of Oman, lat. 24° 55’ N., long. 57° 59’ E., 37 fathoms, sand and mud. Also at 110 fathoms. M.C. Jask, 170 fathoms (1909). 1 Ann. Mag. Nat. Hist., ser. VII, vol. xviii, 1906, p. 164. VOL. XII.—APRIL, 1917. 12 156 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. The delicate spiral lire, very close and fine, distinguish this species from its nearest allies. The canal is slightly produced, ribs stouter and straighter than in the allied D. elydonia, Melv. & St. It is not an uncommon species, though endemic. 41. Drizira persica (Sm.). (Pl. IX, Fig. 6.) Pleurotoma (Drillia) persica, EK. A. Smith, Ann. Mag. Nat. Hist., ser. VI, vol. 11, 1888, p. 307. af A a Melvill & Standen, Proc. Zool. Soc. Lond., 1901, p. 439, pl. xxi, f. 14 (type). P.G. Henjam Island. Fao. Bushire, at about 10-12 fathoms, Gulf of Oman, Muscat, 20 fathoms, not uncommon. Off Diamanayat Island, 100 miles south of Jask, at 20 fathoms. I. Karachi, 5-15 fathoms, in thick clayey mud. Also reported from New Caledonia by Bouge & Dautzenberg. See the remarks (ante, p.154) under dweida, G. & H. Nevill. Mr. Edgar Smith gives 9mm.as maximum length of this species, as against 7°5mm. in disjecta, its very near ally, and which we have sunk as an absolute synonym of lucida, Nev. A dwarf form, however, exists, 6 mm. only in length, from the Gulf of Oman (lat. 25° 6:5’ N., long. 60° 39’ E.). The specimens are bright brownish-pink, very shining. It may not perhaps have attained quite full growth, although the outer lip is fairly formed. It is quite distinct from granatella, Melv. A much larger and very beautiful variety seems worthy of a varietal name as follows :— Var. jacintha, nov. (Pl. IX, Fig. 8.) Shell brilliantly shining, fusiform, somewhat attenuate, white, the interstices deeply shaded with brown-pink, much larger than the typical form—say, long. 14, lat. 4°50 mm. From the Persian Gulf. If it were not for intermediates, this might be considered a fitting claimant for true specific rank. 42. Driiiia poitotima, Melv. & St. Drillia philotima, Melvill & Standen, Ann. Mag. Nat. Hist., ser. vu, vol. xii, 1903, p.ioil, plaax 1216, P.G. Off the Bahrein Islands, 30-50 fathoms. Muscat, 7-80 fathoms. A most graceful species, elegantly fusiform, scabrous, many-ribbed, white, tinted with madder brown or chestnut, its nearest ally being D. dives, Melv. & St., from the same seas. It has but rarely occurred, and, so far as is known, is endemic in this region. 43. Drinir1a prunuLUM, Melv. & St. Drillia prunulum, Melvill & Standen, Proc. Zool. Soc. Lond., 1901, pe 439) pl. xxiv, f. 2. P.G. Henjam Island, Koweit, 10 fathoms. Gulf of Oman, Muscat, 15 fathoms. I. Karachi (September, 1910). MELVILL: TURRIDH OF THE PERSIAN GULF, ETC. 157 A plum-coloured shell, larger in all its parts than tnconstans, Sm., being of the same alliance. The largest specimen I have seen measures long. 18 mm. as against 8°50 mm. in tnconstans. Indeed, the type of the latter only measures 5 mm. The nearest ally seems D. radula, Hinds (Moll. Voy. Sulphur, 1844, p. 16, pl. v, f. 9), from the Straits of Malacca and Australia (Queensland), well figured by Reeve (Conch. Icon., pl. xxv, f. 223). The nodules in radula are shining white, contrasting with the dark-brown body-colour. I have examples from the Lombe Taylor Collection. It is larger (long. 20 mm.) and coarser in its sculpture than prunulum, the largest specimen of which that we have seen comes from Koweit, and measures long. 15 mm. The noduled riblets are here almost twice the number of those obtaining inradula. Notwith- standing this, doubtless znconstans, lithoria, prunulum, pyramidula, and radula have many characters in common, and probably spring from a common ancestor. 44, Drivura prramiputa (Reeve). (Pl. X, Fig. 2.) Pleurotoma pyramidula, Reeve, Proc. Zool. Soc. Lond., 1845, p. 115. Reeve, Conch. Icon., vol. 1, 1845, pl. xxix, f. 260. Clathurella 5 Melv. &St., Proc. Zool. Soc. Lond., 1901, p.445. P.G. Koweit, 10 fathoms. Henjam Island, Muscat, 10 fathoms. Kuh i Mubarik, 45 fathoms. M.C. Charbar, 40 fathoms. So allied to inconstans, Smith, that I have caused the two to be figured in approximation to each other, to show the chief distinctions, which are: (a) in form, the present species tapering gradually to the apex, whilst znconstans is of more abbreviate build. Again (6), the spiral nodules so conspicuous a feature in Smith’s species are hardly present in its ally, pyramidula being, to quote the words in the original description, ‘‘ pyramidally elongated, very closely latticed with minute longitudinal and transverse ridges.” ‘The second and third nuclear whorls are carinate. ” 2? 45. Dritiia RESPLENDENS, Melly. Drillia resplendens, Melvill, Mem. Manch. Soc., vol. xlii, 1898, No. 4, Deel Ley pl atine te 8 Melv. & St., Proc. Zool. Soc. Lond., 1901, p. 439, pleexet, fk. P.G. Muscat, 7-10 fathoms. Gulf of Oman, lat. 24° 55’ N., long. 57° 59’ K., 37 fathoms, sand and mud, only in young condition. On the telegraph cable in three or four places amongst shell and other growths it attains a fair size (20-2 mm.), and is remarkably polished and fine in deep red-brown colour. An albino variety occurred off Muscat. A very bright and beautiful species, one of the most admired of the genus, and belonging to the same section of the genus as lucida, Nevill, and persica, Sm., the variety jacintha of which, just described above, almost exceeds resplendens, if possible, in select elegance. 9? ” 158 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 46. Drittra rosusta (Hinds). Clavatula robusta, Hinds, Moll. Voy. Sulphur, 1844, p. 17, pl. v, f. 12. Pleurotoma ,, Reeve, Conch. Icon., vol. i, 1845, pl. xxiii, f. 204. P.G. Bahrein Isles. We enter this with adegree of doubt. Only one specimen occurred, which probably belongs to this species, but its condition is not good. The type came from Hong-Kong Island (Hinds). Hidalgo mentions it as an Australian shell, probably not occurring in the Philippines. 47. Dritiia sinensis (Hinds). Clavatula sinensis, Hinds, Proc. Zool. Soc. Lond., 1843, p. 38. Pleurotoma ,, Reeve, Conch. Icon., vol. i, 18438, pl. xviii, f. 153. P.G. Mussandam, 45 fathoms (1915), a white variety. Muscat, 20-40 fathoms (1912), finely coloured live varieties. M.C. Rare, an attenuate variety, occurs occasionally at 10-15 fathoms, near Gwadur. I. Karachi. Young examples only, dredged living. A very well-marked species, well figured by Reeve. Originally described from the China Sea and Straits of Macassar, found at depth of from 5-25 fathoms. I may add that Tryon’ is in complete error in attempting to merge Pl. intertincta, Smith, with this species. There could hardly be two Drillia more dissimilar. Hidalgo includes it in his Philippine Catalogue, and Hedley notes it from Queensland. 48. Dritrra sprcrrum (Reeve). Pleurotoma spectrum, Reeve, Proc. Zool. Soc. Lond., 1845, p. 118. i Reeve, Conch. Icon., vol. i, 1845, pl. xxv, f. 222. iP: G. Malcolm Inlet (Kubbatt Cian) 35 fathoms. Gulf of Oman, lat. 26° 10’ N., long. 52° 50’ E., 29 fathoms, none living, mud and ‘rocky basis. These specimens are placed under spectrum with just a little doubt. They agree up to a certain point, and it was thought best to allow for a certain percentage of variability. The original examples, collected by Mr. Hugh Cuming at Puerto Galero, I. Mindoro, Philippines, are described as of thin texture ; also as ‘‘a pale obliquely plaited shell minutely and delicately ridged across ”’ 49. Dertrra tascontum, Melv. & St. Drillia tasconium, Melvill & Standen, Proc. Zool. Soc. Lond., 1901, p. 440, pl. xxiv, f. 3. P.G. Gulf of Oman, lat. 24° 55’ N., long. 57° 59’ E., 37 fathoms, sand and mud. Also a variety at Kuh i Mubarik (1894). Near Jask, at 175 fathoms, fine, live examples (1912). A curious species, isolated in appearance and character. At the time of description we compared it with the figure of D. lucida, 1 Man. Conch., vi, p. 201. MELVILL: TURRIDZ OF THE PERSIAN GULF, ETC. ~ 69 G. & H. Nevill, misled by the highly magnified scale of the illustration. Our species is four times the size, say long. 28 mm. D. pallida, Sowb., of which I possess a beautiful example from Central American shores, is also comparable, but it is not only smaller, whilst the costze of the body-whorl are oblique, and the form more attenuate. D. tasconium is very liable to sea-breaks and slight distorsion, consequently it is not very easy to secure a really good- conditioned specimen. : 50. Dritrra TarLorrana (Reeve). Pleurotoma tayloriana, Reeve, Conch. Icon., i, 1846, pl. xl, f. 366, a, d. P.G. Gulf of Oman, Muscat, 15-40 fathoms. Also in the Persian Gulf proper, Shaikh Shuaib Island, 10 fathoms, fine examples. Our specimens are precisely similar in every way to the type so excellently portrayed by Reeve. D. variabilis, Sm., theoreta, Melv., and topaza, Melv. & St., are the nearest allies. Hidalgo notes it as found by Quadras in the Island of Cebu, Philippines. Hedley, too, notes it from Queensland. 51. Drivtia rHEoRETA, Melv. Drillia theoreta, Melvill, Ann. Mag. Nat. Hist., ser. vit, vol. iv, 1899, Pp. 0, pl. i,t. 2. P.G. Henjam Island, 20-25 fathoms, and a small brightly coloured variety at 10 fathoms. Shaikh Shuaib Island, Kishm, and other islands in the Gulf, seemingly generally distributed. Smaller in all its parts, and with the whorls far less ventricose than obtains in D. tayloriana, Reeve; also some affinity with D. cecchi, Jouss., is observable, but this species is always much paler and with little trace of pattern, the spire is likewise more attenuate, and it has more the character of an abyssal species. 52. Dritita ropaza, M. & St. Drillia topaza, Melvill & Standen, Proc. Zool. Soc. Lond., 1901, p-. 440, pl. xxiv, f. 4. P.G. Gulf of Oman, Muscat, 15-20 fathoms. An ally of D. theoreta, Melv., but much smaller, and with mamillate protoconch. The longitudinal ribs are very few, only six round the body-whorl. The coloration is also peculiar, reddish-pink and dark purplish-red beyond the sinus and round the mouth. It isa rare species, and decidedly local in its distribution. 53. Drittra varrasitis, Sm. (Pl. VIII, Fig. 8.) Driliia variabilis, KE, A. Smith, Ann. Mag. Nat. Hist., ser. rv, vol. xix, 1877, p. 495. D. variabilis, Proc. Zool. Soc. Lond., 1878, p. 805, pl. 1, f. 2, 3. P.G. Off Dabai, among the pearl oyster beds at 6 to 8 fathoms. Gulf of*Oman, lat: 423° 50' N., long: 27° 50° K., soft mud. ~ And also lat. 26° 6’ N., long. 51° 52’ E., 15 fathoms, coral sand. 160 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. I. Telegraph cable at 47 fathoms 100 miles west of Bombay. Small examples near the mouth of the River Indus, Karachi. This species has likewise been received from Andaman Isles (Booley),! whence indeed the original type came. It is also reported from Erythrean waters. We have figured the type, representing a much broader shell than is the case with its congeners, tayloriana, Rve., and theoreta, Melv. The examples I received from the late Mr. G. Booley, just mentioned, are pale in colour, freckled with pale brown, and echinately noduled. § Subgen. TYLOTIA, nom. nov. (=CLAVUS, auctt. non Montfort, 1810). Mr. Iredale assures me it is antagonistic to the laws of priority to continue using the name ‘‘ Clavus”’ subgenerically, it having been published by Montfort twenty-eight years earlier for a different group than the accepted generic ‘‘ Drillia”’, Gray, 1838. Accordingly, a new cognomen being necessary, I venture to propose Zylotia, which, being derived from tvAos, a nail or club, has the same meaning as Clavus. The type appears to be canteularis, Bolt.=auriculifera, Lam. 54, Drimira (Tyzorra) cantcutaris (Bolt.). Strombus lividus, Chemnitz, Conch. Cab., ix, 1786, pl. 136, f.1269-70. x ss Gmelin, Linn, Syst. Nat., 13th ed., tom. i, pt. vi, 1791, p. 3523. », eanicularis, Bolten, Mus. Boltenianum, 1798, p. 100, No. 1291. Pleurotoma auriculifera, Lamarck, Anim. sans Vert., vol. vii, 1822, Oe be e. Reeve, Conch. Icon., vol. 1, 1843, pl. viii, f. 69. 16. Bombay (Abercrombie). Originally described from the Philippines, the present record shows considerable extension of range westward. It has not occurred yet further north. Mr. C. Hedley? uses Gmelin’s name; but Iredale * does not agree with this, and writes exhaustive reasons in favour of Bolten’s name being employed. I am very grateful to Mr. Iredale for the advice he has given me on this subject. This species I consider the type of the section. 55. Dritira (Tyzorra) crassa (Sm.). (Pl. VIII, Fig. 10.) Pleurotoma (Drillia) crassa, KH. A. Smith, Ann. Mag. Nat. Hist., ser. VI, vol. ii, 1888, p. 301. P.G. Muscat. Gulf of Oman, Jask. I. Bombay (Abercrombie). This species might, perhaps, be occasionally confused with sacra, Reeve; the author, in comparing the two, mentions the violet apex of crassa, and its “‘ fewer ribs which are angled, and the upper ends 1 Proc. Malac. Soc. Lond., vol. ii, 1897, p. 166. 2 Proc. Linn. Soc. N.S.W., vol. xxxiv, 1909, p. 453. 3 Proc. Malac. Soc. Lond., vol. xii, 1916, p. 92. MELVILL: TURRIDZ OF THE PERSIAN GULF, ETC. 161 of them not nodose at the suture, the coloration also being different in the two forms’. It is a species of fair size, between 20 and 25 mm. longitudinally. 56. Dririra (Tytorma) rocata (Reeve). Pleurotoma fucata, Reeve, Proc. Zool. Soc. Lond., 1845, p. 110. 4 - » Conch. Icon, voli, 1845, pl. xx, £..169. ‘S Bi » Proc. Linn. Soc. New S. Wales, vol. xxxix, 1914, p. 728. 184 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. the former of them at the base of the body-whorl is distinctive ; all the genuine specimens of this in my collection are so coloured. It is a narrower shell, too, than Hedley’s new species. I doubt the occurrence of true dzcolor in these seas, as has been reported (Proc. Zool. Soc. Lond., 1901, p. 444) in our former catalogue. It may be, however, that in time connecting links between these two nearly allied species may be found. 134. Lrenarpia putcuriprcra (Melv. & St.). j Mangilia pulehripicta, Melvill & Standen, Proc. Zool. Soc. Lond., 1901, p. 443, pl. xxiv, f99. P.G. Mussandam, 55 fathoms. SBushire, towards Fao, Gulf of Oman, lat. 20° 55’ N., long. 37° 57’ E., 37 fathoms. Distinguished by the purplish blotches placed interstitially in the centre of the body-whorl, as is the case with Drillia intertincta, Sm. It seems allied to spurca (Hinds), so we place it, provisionally, in the same genus. But few examples have as yet been collected. 135. Lrenarpra rueosa (Mighels). Pleurotoma rugosa, Mighels, Proc. Boston Soc. N.H., vol. ii, 1845, p. 23. P.G. Gulf of Oman, Muscat, 15 fathoms. I. Karachi, in 8-7 fathoms, amongst loose stones and muddy sand. A widely distributed species throughout the eastern tropics. 136. Lienarpia soror (Sm.). Pleurotoma (Glyphostoma) soror, K. A. Smith, Ann. Mag. Nat. Hist., ser. V, vol. x, 1882, p. 303. Clathurella opsimathes, Melvill & Standen, Ann. Mag. Nat. Hist., ser. VII, vol. xii, 1903, p. 314, pl. xxii, f. 19. PG. Bushire, Hinderabi Island, Galig, and Kishm Islands. Gulf of Oman, Muscat, 10—20 fathoms. M.C. General all along the coast. I. Karachi Harbour, where the finest specimens of all occur in 5 fathoms, among loose stones and muddy sand. We merge our opsimathes with the type species without much hesitation. In the former the colour is more stramineous and the surface less shining, but the general characters are identical. The type of opstmathes came from Shaikh Shuaib Island, Persian Gulf. 137. Lrenarpra spurca (Hinds). Clavatula spurca, R. B. Hinds, Moll. Voy. Sulphur, 1844, p. 17, pl. v, Pele, Pleurotoma spurca, Reeve, Conch. Icon., vol. i, 1846, pl. xxxiv, f. 312. P.G. Linjah Anchorage, 3} fathoms; Henjam Island, 15-28 fathoms; Bahrein Isles, Mussandam, 55 fathoms; Gulf of Oman, Muscat, 10-15 fathoms; lat. 24° 58’ N., long. 56° 54’ E., 156 fathoms. Var. pasniensis, nov. Testa ut in typo, sed omnino albida. P.G. Gulf of Oman, Pasni. MELVILL: TURRIDH OF THE PERSIAN GULF, ETC. 185 Live albino shells dredged off the above locality constitute a well- marked colour variety. The largest examples of this interesting species, surely worthy of a more complimentary cognomen, come from the Linjah Anchorage, and measure long. 14mm. It is of extended range. Hinds described the type from New Guinea and the Straits of Malacca in 5-18 fathoms, mud. Reeve! compares it with argillacea, also of Hinds, and from the same locality (Malacca). Judging from the figure it would seem almost identical. ‘lhe smallest examples of this — species that have come under my notice measure long. 9 mm., and are in my possession, labelled ‘‘From the Lombe Taylor Coll.” Under the name Clathurella spurca, Hidalgo admits it to his Philippine Islands list, and Hedley, as Glyphostoma spurcum, from Queensland. Genus CLATHURINA, nom. noy. = CLATHURELLA,? Carpenter, 1857, DEFRANCIA, Millet, 1826, nom. prexocc. 138. CrarHurina aciata (Melv.). Mangilia aglaia, Melv., Proc. Malac. Soc. Lond., vol. vi, 1904, p. 165, plex, tf, Lor : P.G. Mussandam, 55 fathoms, rarely. The ochreous, beautifully microscopically decussate third and fourth whorls are to be noted. A very elegant species, closely roundly ribbed and latticed, of which but few examples have come to light. In one specimen the third whorl is angled. The sinus is sutural, rather wide. 139. CuarHuRINA aLBIcaupatTa (Sm.). (Pl. IX, Fig. 13.) Pleurotoma (Defrancia?) albicaudata, K. A. Smith, Ann. Mag. Nat. Hast, ser. v, val, x, 1882, p. 299. P.G. Mussandam, 47 fathoms. I. Karachi. On rocks amongst weeds at low tide. The author calls attention to the contrast of coloration in this species, the apex and lowest portion of the body-whorl being white and the remainder of the shell rich brown. I have seen no variation in the many specimens examined. 140. CrarHurina caTuarta, sp. nov. (Pl. X, Fig. 8.) C. testa minuta, candida, delicata, ovato-fusiformi, anfractibus 8, quorum apicales 23 pallide straminei, globulosi, microscopice arcte cancellati, ceteris costatis, costis rotundatis, crassis, undique spiraliter rudi-liratulis, numero costarum anfractus ultimi 9, lirarum 9, deinde 1 Conch. Icon., vol. i, 1845, pl. xxv, f. 217. 2 Mr. T. Iredale informs me that the name Clathurella cannot stand, the type being a large fossil, quite unlike the species hitherto grouped under this designation. No other cognomen has yet been proposed, and hence I would suggest Clathurina, taking as the type Cl. foraminata (Reeve). 186 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. superficie ad basim arcte striata, apertura angusta, labro paullum incrassato, columella obliqua, canali recurvo. (xaOapcos, pure.) Long. 4, lat. 1:5 mm. P.G. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 156 fathoms. The type is in perfect condition, and only one or two specimens have at present been found. Peculiar for its very rounded, incrassate ribs. 141. CrarHuriINna FoRAMINATA (Reeve). Pleurotoma foraminata, Reeve, Proc. Zool. Soc., 1845, p. 118. ” Reeve, Conch. Icon., vol. i, 1845, pl. xxxiil, f, 301. P.G. Gulf of Oman, Muscat, 15 fathoms. I. Bombay (Abercrombie). Also reported from Aden (Shopland). Var. a. camacina, Melv. Clathurella foraminata, Reeve, var. camacina, Melvill, Mem. Proc. Manch. Soc., vol. xlil, pt. ii, 1898, p. 13, pl. i, f. 15. P.G. Linjah Anchorage, 33 fathoms. I. Karachi. A large dark form, more elaborate in sculpture than the type. Var. b. pyrgodea, nov. (Pl. X, Fig. 13.) Testa turrita, major, ad suturas pulchre gradata, anfractibus 8, regularibus, arcte cancellatis, ultimo dorsaliter spiraliter ad basim fossulato, labro fere recto, sinu suturali, lato, canali ad basim recurvo. Long. 11, lat. 4 mm. Hab. Mussandam, 55 fathoms. This may be a monstrosity, but it is very regular in its formation ; the deep ridge round the dorsal base of the body-whorl is a characteristic worth attention. 142. CrarHurtna CAVERNOSA (Reeve). Pleurotoma cavernosa, Reeve, Proc. Zool. Soc. Lond., 1845, p. 118. Bs . Reeve, Conch. Icon., vol. i, 1845, pl. xxxiii, f. 303. M.C. Charbar, 40 fathoms. Slight doubt accompanies this determination, for the only three examples seen were in very poor condition. It extends to the Philippines, and Fiji Is. (Andrew Garrett). 143. CLATHURINA EPIXANTHA (Melv.). Clathurella epixantha, Melvill, Proc. Malac. Soc. Lond., vol. vi, 1904, poo, pl. v,.t. 8. P.G. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 156 fathoms. Also lat. 23° 55’ N., long. 57° 48’ E., 22 fathoms. Since the original description was penned I have seen some brighter-coloured examples, tinged with yellow-ochreous. The mouth is particularly wide, and the sinus well expressed. Apical whorls obscurely striate, the acme itself being smooth and vitreous. Won Nl Pa Vie Proc.Mauac.Soc.Lonp. G.M Woodward, del et lith. TURRIDA OF PERSIAN GULF AND NORTH ARABIAN SEA, VoL .XIL, PuJX. Proc.Manac.soc.Lonp. ‘Let lith. , de’ G.M.Woodward TURRIDA OF PERSIAN GULF AND NORTH ARABIAN SEA. Proxy 3 Vou. Xil Proc.Manac.Soc.Lonpn. G.M Woodward. del et lith. TURRIDAZ OF PERSIAN GULF AND NORTH ARABIAN SEA. GHARCES FOR ADVERTISEMENTS. OUTSIDE COVER. Each insertion-- Whole page . , z 30s. Half page : ; i 15s. Quarter page. P : 7s. 6d. INSIDE COVER. Each insertion-- Whole page . F : 20s. Half page : . : 10s. Quarter page. ser nr cheese ep ORS WPalacotogical Soctety of Pondon. (Founded 27th February, 1893.) Officers and Council—elected 9th February, 1917. President :—J. R. Le B. Tomutn, M.A., F.E.S. Vice-Presidents :—Rev. A. H. Cooxn, S8ce.D., F.Z.S.; A. S. Kmnnarp, F.G.S.; A. Reynewtt ; H. O. N. Saaw, B.Sc., F.ZS. Treasurer :—Professor A. E. Boycott, M.A., D.M., F.R.S., 17 Loom Lane, Radlett, Herts. Secretary :—G. K. Gupu, F.Z.S., 9 Wimbledon Park Road, Wandsworth, London, 8.W. 18. Editor:—B. B. Woopwarp, F.L.S., etc., 4 Longfield Road, Ealing, London, W. 5. Other Members of Council:—Rev. E. W. BowEun, M.A.; G. C. Crick, F.G.S.; T. Inppate; R. B. Newton, F.G.S.; A. E. SALisBury ; E. R. Sykes, B.A., F.L.8. By kind permission of the Council of the Juinnuan Sociwry, the MEETINGS are held in their apartments at Burninaron Housn, Procapiniy, W.1, on the second FriDay in each month from NovEMBER to JUNE. The OBJECT of the Society is to promote the study of the Mollusca, both recent and fossil. MEMBERS, both Ordinary and Corresponding (the latter resident without the British Islands), are elected by ballot on a certificate of recommendation signed by two or more Members. LADIES are eligible for election. The SUBSCRIPTION is, for Ordinary Members 10s. 6d. per annum or £7 7s. for Life, for Corresponding Members 7s. 6d. per auuum or £5 5s. for Life. All Members on election pay an Entrance Fee of 10s. 6d. The PROCEEDINGS are issued three times a year, aud each Member is eutitled to receive a copy of those numbers issued during membership. [Vols. I-VIII and Vol. IX, Parts I-III, consisting of 52 Parts, price 5s. net per Part. Parts IV-VI of Vol. IX, and all succeeding Parts, price 7s. 6d. each. A discount of 20 per cent upon the above prices is allowed to Members purchasing these Volumes or Parts through the Secretary. ] Further information, with forms of proposal for Membership, may be obtained from the Secretary, to whom all communications should be sent at his private address, as given above. STEPHEN AUSTIN AND SONS, LTD., PRINTERS, HERTFORD. Vol. XII. Part V. AUGUST, 1917. Price 7s, 6d. net. PROCEEDINGS OF THE MALACOLOGICAL SOCIETY OF LONDON. EDITED BY B. B. WOODWARD, F.L.S., ETc., Under the direction of the Publication Committee. AUTHORS ALONE ARE RESPONSIBLE FOR THE STATEMENTS IN THEIR RESPECTIVE PAPERS. Oey an at oa PROCEEDINGS :— PAGE PAPERS continued :— PAGE Annual Meeting : Genitalia of