638 



90. Cyther^a CONVEXA (pi. cxxxii. f. 119), Say. C. Sayana, 

 Conrad, Silliman^s Journal, vol. xxiii. p. 345. 



Cyth. testa ovali, ventricosa, fulva, subrugosa ; latere antico 

 brevi ; lunula vix distincta. 



Shell oval, brownish, veutricose, roughened by concentric 

 irregular and rather coarse strice. 



Rhode Island; New Jersey. Specimens, Mr. Cuming's and 

 Mr. Hanle/s. 



91. Cyther^a PALLESCENS (pi. cxxxii. f. \2>'b),Sowerh>/,sen., 

 Pro. Zool. Soc. 1835. p. 47. 



" Cyth, testa obovata, tenui, pallide lutescente, Iffivi, concen- 

 trice striata ; latere antico breviore, apicibus subprominulis ; im- 

 pressione cordiformi, antica elongata, distincta." 



Shell of an oval flattish form, rather light, pale yellowish, or 

 with a purplish tinge near the umbones ; concentric strise so fine 

 as to give a silky appearance to the surface. 



Island of Annaa, Pomoutian Group ; in coral sand. Cuming. 



92. Cyther^a inconspicua (pi, cxxxii. f. 133, 134), Sower- 

 hy, sen., Pro. Zool. Soc. 1835. p. 47. 



"Cyth. testa obovata, crassiuscula, Iffivi, albida, concentrice 

 striata, striis exiUssimis ; epidermide tenuissima, pallide subfusca ; 

 apicibus subprominulis ; impressione cordiformi, antica ovata, 

 inconspicua." 



Shell more thick, and with the striae more distinct than the 

 preceding. 



Payta, Peru. Cuming. 



92*. Cyther^a Kingii (pi. cxxxiii. f. 129, 130, 131, 132), 

 Gray, Wood's Suppl. Venus, f. 9. C. modesta, RJdlippi, Abbild. 

 t. iii. f. 3. Var. C. Lamarckii, Gray, Analyst, 1838 ; Hanley, 

 Eecent Shells, p. 103. Var. C. albida, Gr«j^ ? Var. C. bilunu- 

 lata, Brit. Mus. 



Cyth. testa ovali-oblonga, subcompressa, medio laevigata, ad 

 latera substriata, albida, castaneo fasciatim varie radiata; latere 

 antico brevi, declivi, lunula elongata, subcomplanata, (Hstincta; 

 latere postico elongato, subquadrato, margine dorsali subelevato. 



Shell oval, oblong, not very ventricose, smooth in the middle, 

 slightly striated at the sides; whitish, generally with chestnut 

 rays either linear or broad; anterior side short, sloped, with 

 the lunule long and defined ; hinder side elongated, rather square, 



