P5AMM0BIA.— Plate VII. 



The scaled Psammobia. Shell oblong-transverse, 

 arched, thin, nearly equilateral, obliquely wave- 

 ridged, posteriorly radiately ribbed, ribs prominent, 

 scaled, rather distant, blue-violet, sometimes whit- 

 ish, mottled with rose, anterior side rounded, poste- 

 rior obliquely truncated and gaping. 

 Lamarck, Anim. sans vert. vol. vi. p. 176. 

 Hab. Island of Masbate, Philippines ; Cuming. 



A delicate and beautifully sculptured species, chiefly 

 distinguished by the prominent openly spread develop- 

 ment of the posterior ribs and gaping extremity. 



Species 51. (Mus. Cuming.) 



Psammobia bugulosa. Psam. testa elongato4ransverad, 

 subarctiatd, tenui, inaquilaterali, oblique rugulono- 

 Uratd, postice radiaiim cosialo, costk scabrosk, lules- 

 eente-albd, latere antico attenualo-rotundato, postico 

 ailenualo-rodraio et obliqui Inmcalo. 



The -wrinkled Psammobia. Shell elongately trans- 

 verse, slightly arclied, thin, inequilateral, obliquely 

 wrinkle -ridged, posteriorly radiately ribbed, ribs 

 scabrous, yellowish-white, anterior side attenuately 

 rounded, posterior attenuately beaked and obliquely 

 truncated. 



Adams and Eeeve, Moll. Voy. Samarang, p. 81. pi. 24. 

 f. 4. 



Hab. China Sea. 



The posterior side of this species is more attenuately 



beaked than in other examples of the genus. 



rupted at the posterior side, posterior side rather 

 depressed, scarcely truncated, bipartite, divaricately 

 wrinkle-ribbed. 



Deshayes, Pro. Zool. Soc. 18.54, p. 325. 



Hab. Philippine Islands ; Cuming. 

 The posterior side of this species is less distinguished 



in form from the anterior than usual, and both sides gape 



at the extremity. 



(Species 52. Mus. Cuming.) 



Psammobia pennata. Psam. testa ovato-tra/tsversd, in- 

 aquilaterali, utrinqne hiante, albo-grised, albo et ru- 

 bescenie irregulariter minute maculatd, oblique tenuis- 

 sime striatd, striis ad latm posticum abrupte interrup- 

 tis, latere postico depressinsculo, vix truncato, bipar- 

 tito, divaricatim corrugato-coslato. 



The winged Psammobia. Shell ovately transverse, in- 

 equilateral, gaping at each side, whitish-grey, irre- 

 gularly minutely spotted with white and pale red, 

 obliquely very finely striated, stria; abruptly inter- 



species 53. (Mus. Cuming.) 



Psammobia petalika. Psam. lesid oblongo-trailsversd, 

 tenuissimd, pelliicidd, valde inaquilaterali pallide 

 violascente, violaeeo quinqueradiatd, nitente, latere 

 antico elongato, postico brevi, ambobus rotundatis. 



The little petal Psammobia. Shell oblong-trans- 

 verse, very thin, transparent, very inequilateral, pale- 

 violet, five-rayed with darker violet, shining, anterior 

 side elongated, posterior side short, both rounded. 



Deshayes, Pro. Zool. Soc. 1854, p. 320. 



Hab. China Sea. 



An extremely delicate, transparent, violet-rayed shell, 



without any indication of the peculiar sloping sculpture 



which is chiefly characteristic of this genus. 



Species 54. (Mus. Cuming.) 



Psammobia suffusa. Psam. testd oblongo-transversd, 

 tenui, subcompressd, subaquilaterali, ubliqiie lirato- 

 striatd, striis ad latus posticum subitu interruptis, 

 purpurascente-violaced, albo tenuiradiatd, latere antico 

 rotwidato, postico latiore, lavigato, mbangulato-lrun- 

 cato. 



The blushing Psammobia. Shell oblong-transverse, 

 thin, rather compressed, nearly equilateral, obliquely 

 ridge-striated, stria; suddenly interrupted on the pos- 

 terior side, purple-violet, finely rayed with white, 

 anterior side rounded, posterior broader, smooth, 

 somewhat angularly truncated. 



Hab. Malacca. 



A thin, purple-violet shell, delicately rayed with white, 



conspicuously sculptured with obliquely sloping ridges. 



