80 BIVALVE SHELLS, 



V. Testa ovato-transversa, angusta. 



83. DlONE GIGANTEA. B.M. 



D. testa oblonga, subovali, compressa, Isevi, magna, rubeseente 

 fulva, maculis quadratis fusco-nigrescentibus interruptim ra- 

 (liata, intus alba; latere antico brevi, subacuminato, postico 

 elongato, ad terminum subquailrato ; margine dorsali subre- 

 tuso ; ligamento elongato ; lunula oblonga, distincta. 



Telline, Favanne, Conch. pl. 49, i. il. 



Venus gigantea, Chemn. Conch. x. 354. pl. 171. f. 1661. 



Gmel. p. 3282. no. 89. 

 Venus, EncycL Meth. pl. 280. f. 3. 



Dillw. Cat. i. 202. no. 102; Wood, Ind. pl. 8. f. 100. 

 Cytherea gigautea, Lamk. An. s. Vert. v. 564. no. 13 ; ed. 2. vr, 

 302; ed. Brux. ii. 216. 



Desh. Encycl. Meth. Vers, ii. 55. no. 8. 



Hanley, Descr. Cat. p. 97. 



Sow. Thes. Conch. p. 628. pl. 131. f. 8^, 



DeKay, Zool. Neiv York, pt. 5. p. 216. 



Conrad, Shells of Tampa Bay, Sill. Journ. ser. 2. ii. 394, 



Hab. Sinus Mexicanus. 



84. DioNE Grayi, Desh. B.M. 



I). testa ovato-transversa, insequilaterali, turgidula, solida, Isevi- 

 gata^ polita, candidissima intus extusque, apicibus minimis 

 vix prominentibus, roseis ; latere antico breviore angustiore 

 quam postico ; lunula patenti, linea impressa circumdata ovato- 

 oblonga ; sinu pallii brevi, trigono, subffiquilaterali, superne 

 gibbo. 



Chione apicalis, Gray, Cai. Cyth. Anal. viii. 306 (non Philippi). 



Hab. ? 



85. DlONE SPH^RICULA. 



D. testa orbiculari, subaequilaterali, turgida, subsphreroidali, can- 

 didissima, transversim sulcata; sulcis antice posticeque evanidis, 

 in medio convexiusculis latioribus; mnbonibus magnis, ele- 

 vatis, recurvis, cordatis; lunula brevi, impressa, cordiformi, 

 in medio purpureo maculata ; valvis incrassatis, intus albis, 

 ad marginem posticum purpureo maculatis ; sinu pallii brevi^ 

 triangulari, sequilaterali. 



Chione sphaericula, Desh. Proc. Zool, Soc. 1853, 



Hab, ? Coll. Cuming. 



