PSAMMOBIA 



Plate V. 



Species 28. (Fig. 28 and 30, Mus. Cuming.) 



PsAMMOBiA BiCARiNATA. I'sttm. testd elotigato-tratis- 

 versd, angustd, depressd, soUduld, cequilaterali, atro- 

 violaccu, obsolete saturniiore radiatd, ti'ansversim sul- 

 cata, S'ulcis versus manfmem ohliqiie pUeaiis, latere 

 antico Totundato, postico oUl/jue trimca/u et rostraio, 

 ah umbone bicarinato. 



The two-keeled Psammobia. Shell elongately trans- 

 verse, narrow, depressed, rather solid, equilateral, 

 dark-violet, obsoletely darker rayed, transversely 

 grooved, grooves obliquely plicated towards the mar- 

 gin, anterior side rounded, posterior obliquely trun- 

 cated and beaked, two-keeled from the umbo. 



DESH.4.YES, Pro. Zool. Soc. 185-t, p. 322. 



Ilab. Zanzibar; T. Thome. 



A dark purple shell, sometimes white, stained with 

 rose, as in Fig. 30, sculptured with obliquely sloping folds 

 near the margin, the posterior extremity being beaked, 

 with two-keeled angles running down from the umbo. 



Species 29. (Mus. Cuming.) 

 PsAMSlOBiA ZONALIS. Psavi. ttstd miyuste tr, 



compressd, siiba-qnilaterali, tennissime striata, uitente, 

 albidd, zonis transversis livido-roseis, latere antico ro- 

 tundato, postico ah wnhone subangulato, trtmcato. 

 The zoned Psammobia. Shell narrowly transverse, 

 compressed, nearly equilateral, very finely striated, 

 shining, whitish, with transverse livid-rose zones, 

 anterior side rounded, posterior slightly angled from 

 the umbo, and truncated. 

 I'samriiolaa zonalis, Lamarck, Anim. sans vert. vol. vi. p. 



183. 

 Hah. Tasmania; E. C. Gunn. 



A smooth compressed species, very finely striated to- 

 wards the margin and extremities, painted with delicate 

 livid-rose zones. 



Species 31. (Mus. Cuming.) 

 Psammobia Tellin^formis. Psam. testd anguste trans- 

 versa, compressd, suhmiidlaterali, dense tenuistriatd, 

 nitente, striis ad latus posticum plicato-elevatis ; al- 

 bidd, livido-carneo pallide radiatd, latere antico rotun- 

 dato, postico rotimdato-truncato, ah umbone siiperf- 

 cialiter angulato. 



The Tellina-shaped Psammobia. Shell narrowly 

 transverse, compressed, nearly equilateral, closely 

 finely striated, shining, strife plicately raised on the 

 posterior side ; whitish, faintly rayed with livid-flesh, 

 anterior side rounded, posterior rotundately trun- 

 cated, superficially angled from the umbo. 

 Deshayes, MS., Mus. Cuming. 



Hab. ? 



Unusually compressed, with the posterior angular con- 

 cavity only superficially developed, the surface being faintly 

 rayed with a thin livid-tlesh tint. 



Species 33. (Mus. Cuming.) 

 Psammobia castrensis. Psam. testd ovato-trarisversd, 

 tenui, pellucidd, subaguilaterali, nitente, vix striata, 

 purpurascente-albd, maculis hieroglyphicis purpuras- 

 centibus picta, epiderinide tenui corned prope margines 

 indutd, lateribtis rotimdatis, postico tumidulo. 

 The camp-marked Psammobia. Shell ovately transverse, 

 thin, pellucid, nearly equilateral, shining, scarcely 

 striated, purplish-white, painted with obscure hiero- 

 glyphic purplish spots, covered with a thin horny 

 epidermis near the margins, sides rounded, posterior 

 slightly swollen. 

 Hanley, Species of Shells, p. 59. 



Solen castrensis, Chemnitz. 

 Hab. Sorsogon, Island of Luzon, Philippines ; Cuming. 



A semipellucid smooth shell, covered towards the mar- 

 gin with a thin horny epidermis, not unlike a Soleit in 

 general aspect. 



Species 33. (Mus. Cuming.) 



Psammobia Ferroensis. Psam. testd anguste transversa, 

 subcompressd, snheeguilaterali, striata, striis ad latus 

 posticutn subplicatis, ad angnlum striis radiantihus 

 decussatis ; albidd, roseo radiatd, ad margines epider- 

 mide vestitd, latere antico rotundato, postico attemiato- 

 truncalo ab umbonem angulato. 



Tub Ferroe Psammobia. Shell narrowly transverse, 

 rather compressed, nearly equilateral, striated, stria> 

 subplicated on the posterior side, decussated on the 

 angle with radiating striffi ; whitish, rayed with pink, 

 clothed with an epidermis at the margins, anterior 



December, 1856. 



