176 AMERICAN MARINE CONCHOLOGY. 



3. L. PICTUM, Ravenel. 



Proc. Philad. Acad., 44. 1861. 



Shell ovate, triangular, very oblique, somewhat compressed, 

 smooth, polished, with a few obsolete ribs at each end, and 

 obsoletely waved by the lines of growth ; beaks small,, prominent, 

 nearly touching, very much in advance of the centre, anterior end 

 short, regularly curved, posterior end produced, somewhat angular. 

 Color reddish-brown in zigzag spots and blotches upon a white 

 ground, internally polished, reddish-brown, clouded, with some 

 patches of yellow and a little white ; margin crenulated. 



Length 18, height 20 mill. 



Charleston, S. C. 



I have not seen this species ; it is, perhaps, a highly-colored 

 G. Mortoni. 



Genus SEEEIPES, Beck. 

 Verzeich. d. Deutsch. Naturf. in Kiel, 217. 



Aphrodite, Lea, Am. Philos. Trans, v. 1834. 



1. S. GROENLANDICUS, Chemnitz. Fig. 458. 



(Cardium.) Conch. Cab., vi. t. 19, f. 198. 1782. 

 Aphrodite columba, Lea, Trans. Am. Philos. Soc., v. t. 18, f. 54. 1834. 



Shell large, thick, heart-shaped, somewhat compressed ; beaks 

 submedial, prominent, incurved, contiguous ; obsoletely radiately 

 striate ; margin entire, gaping behind. Epidermis thin, pale 

 olivaceous or drab, the young with occasionally zigzag daukei 

 lines; within white or yellowish. 



Length 2.7, height 2.3 inches. 



Maine, northwards. 



Family CHAMID^E. 



Labial palpi small, curved, obliquely truncate. Mantle closed, 

 margins united by a fringed curtain ; siphonal orifices small, wide 

 apart, the branchial slightly prominent, with the orifice fimbriated, 

 the anal with a simple valve ; gills two on each side, unequal, 

 plicate. Foot cylindrical, bent. Living attached to stones and 

 rocks. 



