731 



prominence of the laminrp, but not sufficiently so to justify se- 

 paration. Both the varieties figured are in Mr. Cuming's collec- 

 tion. Mr. Adams's F. elegans is more elongated. 

 Eastern Seas. 



82. Venus elegans (pi. clviii. f. 138), Adams, Moll. Sama- 

 rang, p. 79. pi. 24. f. 13. 



V. testa V. declivi simili, sed magis quadrata ; laminis concen- 

 tricis alternatim elevatis. 



Of a more quadrate and elongated form than V. declivis, with 

 the ribs alternately more produced, the end slightly truncated. 

 We copy the figure. The shell is from some of the East Indian 

 Islands. 



83. Venus exalbida (pi. clxi. f. 193), Chemnitz, Conch, 

 f. 1974; Lamarck, Venus, no. 29. 



V. testa sordide alba, ovali-subquadrata, magna, striis elevatis 

 insequalibus numerosis ad latera sublaminatis cincta ; latere pos- 

 tico oblongo, subangulato, subtruncato; margine dorsali subar- 

 cuato, laminato, planulatim depresso ; latere antico subrotundato, 

 brevi, superue decHvi ; lunula elongata, striata ; margine interno 

 Isevi. 



A large, rather flat, oblong shell, with raised concentric strise, 

 of very unequal growth and development. 



Strait of Magellan. 



84. Venus lenticularis (pi. clxi. f. 194), Sowerby, Pro. 

 Zool. Soc. 1835, p. 42. 



"V. testa lenticulari-subtrapeziformi, crassa, opaca, pallida, 

 Isevi, lineis concentricis antice posticeque distinctis, medio ob- 

 soletis, prope umbonem elevatiusculis ; margine dorsali subrotun- 

 dato, postice subangulato ; impressione cordiformi elongata, parva, 

 impressa, intus albida; margine ventrali Isevi." 



Shaped like an Artemis, and nearly smooth, but with the teeth 

 and muscular impressions more like the generality of species of 

 Venus; dorsal margin depressed; lunule long, rather hollow; 

 ventral margin smooth within. 



Valparaiso Bay ; in coarse sand at low water. Cuming. 



85. Venus quadrangulams (pi. clxi. f. 196), Adams, Voy. 

 Samarang, Moll. p. 79. pi. 24. f. 7. 



"V. testa quadrato-ovata, subcompressa, crassiuscula, concen- 

 trice tenuiter et irregulariter striata, palhde straminea, nitida; 



