737 



In form more like /'. uphroclina than V. scalarina, but having 

 the ribs crenulated by fine radiating strise. Lamarck has not 

 mentioned the latter charucter, and perhaps did not observe it, 

 but tlie fact of V. aplirodina not being marked Mith the angular 

 grey Knes which characterize some specimens of our species, points 

 to the probability of our identification being correct. 



Austraha. 



100. Venus astartoides (pi. clviii. f. 137), FJdU^ipi, ? 



V. testa ovah-subtrigona, laevi, alba, epidermide pallide subviridi 

 induta, conceutrice leviter costellata ; umbonibus corrosis ; mar- 

 gine dorsali et lunula declivibus, lajvibus ; latere postico subelon- 

 gato, vix truncato. 



Eather trigonal, very smooth, colourless, and covered by a thin 

 pale epidermis; the concentric ridges are very slightly raised. 

 This shell has very much the appearance of an Adarte, but is thin, 

 and has a slight bend in the paUial impression. 



Greenland. 



101. Venus gemma (pi. clviii. f. 141), Totten, Silliman's 

 Journal, vol. 26. p. 367. 



y. testa minuta, tenui, rotundato-subtrigona, subaequilatera, 

 leevi, postice violacea; lunula et area dorsaH distinctis nullis; 

 pallii impressiones sinu elongato, erecto, trigouo. 



A minute, partly rounded, partly trigonal, nearly equilateral, 

 smooth, purple-tinged, thin shell, with a remarkably erect, 

 pointed sinus in the paUial impression. 



New York. 



102. Venus pumigata (pi. clix. f. 152-155), Sowerbi/,jtm. 



V. testa Isevi, crassa, oblique subovali, antice rotundata, plana, 

 postice subangulatim producta, subsulcata, colore fumoso, prope 

 umbones maculatim radiata; area dorsaH et lunula lividis, de- 

 pressis, Isevibus ; margine ventrali arcuato. 



Much shorter, more full tlian F. Kockii, and not contracted or 

 beaked behind ; there are a few slight grooves on the posterior 

 angle. The colour is dull smoky, with spotted rays near the um- 

 boes. The fine specimen figured^ half the natural size, is from the 

 collection of Mr. Gaskoin. I regret being unable to find room in 

 the plates to figure a ver// smoky variety of this, lately added to 

 Mr. Cuming's collection. 



Australia. Strange. 



