PSAMMOBIA.— Plate I. 



Species 4. (Mus. Cuming.) 



PsAMMOBiA MAXIMA. Psam. testd ovato-transversd, com- 

 pressiusculd, solidd, valde ituBquilaterali, rude concen- 

 trice liratd et striata, liris postice subundulatis ; lutes- 

 cente-albd, radiis carneo-roseis lineisqne angularibm 

 notatd; lateribus rotundalk, postico subobliqui trun- 

 cato. 



The very large Psammobia. Shell ovately transverse, 

 rather compressed, solid, very inequilateral, rudely 

 concentrically ridged and striated, ridges slightly 

 waved on the posterior side ; yellowish-while, marked 

 with faiut flesh-rose rays and angular lines, sides 

 rounded, the posterior somewhat obliciuely truncated. 



Deshayes, Pro. Zool. Soc. 1854, p. 317. 



Ilab. Panama. 



A very solid roughly-formed shell, of brownish chalk 



substance, mottled throughout with faint-red triangular 



marks. 



Species 5. (Mus. Cuming.) 



Psammobia anomala. Psam. testa elongato-transversd, 

 tenui, fragili, tmniduld, sub/gquilaterali, transversim 

 oblique minute striata, striis ad latera evanidis; lu- 

 tescenle-carned, prope umicmem- aurantio tinctd; latere 

 antico paulo attenuato, postico suilaie angidato. 



The anomalous Psammobia. Shell elongately trans- 

 verse, thin, fragile, rather swollen, nearly equilateral, 

 transversely obliquely minutely striated, striae disap- 

 pearing at the sides; yellowish flesh-colour, tinged 

 with orange near the umbo ; anterior side a little at- 

 tenuated, posterior rather broadly angled. 



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



Hah. BrisbaneWater, east coast of New Holland; Strange. 



A delicate orange-tinted shell, having the posterior 

 igle rather concavely impressed. 



Species 6. (Mus. Cuming.) 



Psammobia Tellinella. Psam. testa elongato-transversd, 

 subaqtdlaterali, lavigatd; sordide carneo-a/bd, riifo 

 tinctd et interrupte radiatd, umbonibus vimde rufo 

 biradiatd. 



The little Tellen Psammobia. Shell elongately 

 transverse, nearly equilateral, smooth ; dull flesh- 

 white, tinged and interruptedly rayed with red, um- 

 boes two-rayed with deep scarlet. 



Lamarck, Anim. sans vert. vol. vi. p. 177. 

 Psammobia floruJa, Turton. 



Eab. Britain. 



A pretty orange-tinted simply convex shell, with two 



small bright pink rays darting from the umboes. 



7. (Mus. Cuming.) 



Psammobia lata. Psam. testa ovato-transversd, lata, 

 depressd, solidd, ituequilaterali, inaqtialiter transver- 

 sim striaid; purpurascente, epidermide lutescente-oli- 

 vaced indutd ; lateribus subtruncato-rotmidatis. 



The broad Psammobia. Shell ovately transver.se, broad, 

 depressed, solid, inequilateral, unequally transversely 

 striated; purplish, covered with a yellowish-olive 

 epidermis ; sides somewhat truncately rounded. 



Desh.\yes, Pro. Zool. Soc. 1854, p. 318. 



Hab. St. Elena, West Columbia ; Curaiug. 



A broad square shell, almost entirely enveloped in a 

 skin-like yellowish-olive epidermis. 



