PSAMMOBIA. 



Plate VI. 



Species 37. (Fig. a, b, Miis. Cuming.) 



PsAJiMOBiA TENUIS. Psam. testa elougato-transversd, con- 

 veximculd, termi, hjalina, huequilaterali, aliidd, in- 

 terdum roseo radiatd, oblique tenimsinie striata, striis 

 ad laitts posticum abrupte terminafis, latere antico sub- 

 attenuato, postico breviore, late truncato. 



The thin Psammobia. Shell elongately transverse, 

 rather convex, thin, hyaline, inequilateral, whitish, 

 sometimes rayed with rose, obliquely very finely stri- 

 ated, striae abruptly terminated on the posterior side, 

 anterior side slightly attenuated, posterior shorter, 

 broadly truncated. 



Deshayes, Pro. Zool. Soc. 1854, p. 330. 



Hab. Philippine Islands ; Cuming. 



The posterior side of this delicate hyaline species is 



co'iipressly truncated and more angularly sloped in some 



specimens than in others. 



Species 38. (Mus. Cuming.) 

 Psammobia costulata. Psam. testa elongato-transversd, 

 tenuicttld, inaquilaterali, concentrice sulcato-striatd, 

 albidd, intense roseo pauciradiatd, latere antico atte- 

 nuato-rotundato, postico breviore, rotundato, radiatim 

 tenui-costato. 

 The finely ribbed Psammobia. Shell elongately trans- 

 verse, rather thin, inequilateral, concentrically groove- 

 striated, whitish, marked with a few deep rose rays, 

 anterior side attenuately rounded, posterior shorter, 

 rounded, radiately finely ribbed. 

 TuRTON, Dithyra Brit. p. 87. pi. 6. f. 8. 



Psammobia discors, Philippi. 

 Hab. Porto Santo, Madeiras, Sicily, British Isles. 



A small elongately transverse species, sculptured in a 

 characteristic manner on the posterior side with fine ra- 

 diating ribs. 



Species 30. (Mus. Cuming.) 

 Psammobia abrupta. Psam. testa elongato-tramversd, 

 tenui, pellucidd, aquilaterali, compressd, 'albidd, 

 transversim costafd, cosfis obtusis, stibobliquis, postice 

 abrupte interruptis, latere postico compresso, costis 

 latis radiantibus sculpto, supernc recto, ad eitremita- 

 lem rotundato-trmicato. 



The abrupt Psammobia. Shell elongately transverse, 

 thin, pellucid, equilateral, compressed, whitish, 

 transversely ribbed, ribs obtuse, rather oblique, poste- 

 riorly abruptly interrupted, posterior side compressed, 

 sculptured with broad radiating ribs, straight at the 

 upper part, rotundately truncated at the extremity. 



Deshayes, Pro. Zool. Soc. 1854, p. 324. 



Hab. Philippine Islands ; Cuming. 

 The ribbed sculpture of this delicate little transparent 



shell is very conspicuous. 



Species 40. (Mus. Cuming.) 



Psammobia eburnea. Psam. testa oblongo-lransversd, 

 valde compressd, lavigatd, nitente, alba, inceqmlate- 

 rali, latere antico late rotundato, postico breviuscalo, 

 ad marginem superam anguste angulato-impresso, ad 

 extremitatem rotundato. 



The ivory Psammobia. Shell oblong-transverse, very 

 compressed, smooth, shining, white, inequilateral, 

 anterior side broadly rounded, posterior rather short, 

 narrowly angularly impressed along the upper mar- 

 gin, rounded at the extremity. 



Hab. Malacca. 



A thin compressed smootii ivory-like shell, with a simple 



narrowly impressed slope along the upper posterior edge. 



Species 41. (Mus. Cuming.) 



Psammobia candidula. Psam. testa oblongo-transxersd, 

 imniduld, crassitiseuld, subaquilaterali, lavigatd, irre- 

 gulariter incremento mterruptd,fiavescente-albd, late- 

 ribus rottmdatis, ab umhonem declivibus, latere postico 

 paululum breviore, obtuse angulato. 



The white Psammobia. Shell oblong-transverse, rather 

 swollen, somewhat thick, nearly equilateral, smooth, 

 irregularly interrupted with lines of growth, yellow- 

 ish-white, sides rounded, slanting from the umbo, 

 posterior side rather the shorter, obtusely angled. 



Deshayes, Pro. Zool. Soc. 1854, p. 319. 



Hab. Philippine Islands ; Cuming. 



Of a solid dead-white aspect, smooth throughout, with 



only the faintest indication of an angle on the posterior 



side. 



