732 



umbonibus roseis ; latere antico brevi, postico multo longiore ; 

 lunula parum distincta." 



A companion to V. lenticularis, but much thicker and more 

 square. Of a light shining straw-colour. 



Corean Archipelago. 



86. Venus oblonga (pi. clxi. f. 197, 198), Gray, Yates's 

 New Zealand. 



V. testa ovali, ventricosa, ferruginea vcl alba, intus alba, cos- 

 tellis concentricis numerosis obtuse et interrupthn lamellosis non- 

 nullis subundulatim divaricatis cincta ; latere postico elongate, 

 rotundato; margine dorsali paululum declivi, simplici; latere an- 

 tico brevi; lunula plena, striata; margine ventrali intus crenu- 

 lato. 



Of an oblong-oval, full form ; the concentric ridges are thick, 

 square, rather nndulated, some of them interrupted and diverging 

 near the sides, with interstices two or three times their breadth ; 

 dorsal margin rounded, simple. The anterior side is . short, with 

 laminated lunule ; inner margin crcnulated. 



New Zealand. 



87. Venus albo-kadiata (pi. clxi. f. 199), 8owerhj, jim. 



V. testa ovata, ventricosa, fulva grisescente albo biradiata, cos- 

 tellis concentricis numerosis kevibus integris ad latera et prope 

 niarginem erecto-laminatis prope marginem ventralem crebrius- 

 culis depressis obtusis cincta ; latere postico elongato, ad terminum 

 obtuse triangulate ; margine dorsali striate, subangulatim de- 

 presso, subarcuato ; latere antico brevi, rotundatim elevato ; lu- 

 nula fusca, striata ; margine ventrali intus crenulato. 



In shape and sculpture resembling J . oblonga, but the concen- 

 tric laminae smoother, and becoming more close and rounded near 

 the ventral margin ; the hinder side has three obscure angles at 

 the extremity, and the dorsal margin is angularly depressed. The 

 lunule is dark brown. 



Gulf of Mexico. In Mr. Cuming's collection. 



88. Venus albina (pi. clxi. f. 201), Sowerbv, jun. 



V. testa alba, V. albo-radiatce simili, sed antice longiuscula, 

 margine magis excavata ; lunula fusca, subexcavata ; laminis con- 

 centricis prope marginem ventralem numerosissimis. 



In V. albo-racliata the concentric ribs become closer, broader, 



