254 



lamelloso : intus alba. Long. If ; alt. 1^ ; lat. ^ poll. Hob. 

 Feejee Islands. 



Like T. capsoides, Lam., but less triangular, the anterior por- 

 tion more tumid, and its dorsal slope arcuate ; the flexure is 

 more decided ; the concentric laminse decided and uniform 

 throughout ; the radiating strise are very delicate, and found 

 equally before and behind, not crossing the concentric laminae. 

 It is much like T pristis, Lam., except in form, and its anterior 

 margin, which is represented as serrated. 



Tellina perula. T. parvula, solidiuscula, ventricosa, rotun- 

 dato-triangularis, eburnea, concentrice et remote striatula ; um- 

 bonibus t mi iis,submedianis, radiis binis lacteis ornatis ; margin- 

 ibus dorsalibus valde declivibus ; latere antico rotundato, tumido ; 

 latere siphonali brevi, valde flexuoso, infra angulato ; margine 

 ventrali pendulo ; cavositatis limbo albo, disco sulphureo ; denti- 

 bus lateralibus conspicuis. Long. ^ ; alt. f ; lat. -2% poll. Hab. 

 Feejee Islands. 



Very much like T. casta, Hanley, which is described as pel- 

 lucid, and no mention is made of the yellow color of the interior, 

 or of the two white umbonal radiations. One specimen is tinted 

 and zoned with rose red, and the interior is wholly red, preserv- 

 ing however, the umbonal white rays. 



PsAMMOBiA FLORIDA. Tcsta transversa, oblonga, tenera, 

 polita, purpurascens, pos'ice albo-radiata ; limbo epidermide 

 flavo-virescente induto ; natibus postmedianis, inconspicuis ; latere 

 antico semi-elliptico, apice supra-mediano ; latere siphonali 

 angustato, acute rotundato, apice infra mediano ; margine ven- 

 trali rectiusculo : interior incarnata ; sinu siphonali angusto, 

 prselongo ; cardine dentibus duobus minutis divaricantibus 

 in utraque valva instructo. Long. 1^ ; alt. -^^ poll. Hah. lUa- 

 warra, N. S. Wales. 



A shell closely resembling in structure and exterior coloring 

 Machcera costata. It has the form of P. vespertina, except that 

 the beaks are removed much further backwards. 



DoNAx PALLiDUS. Testa transversa, ovato-triangularis, solidula, 

 convexa, exalbida, postice concentrice sulculata, antice polita ; 

 umbonibus postmedianis ; margine dorsali utrinque declivi (prse- 

 cipue retro) convexiusculo ; latere antico semi-ovali, sensim 



