176 AMERICAN MARINE CONCHOLOGY. 



3. L. piCTUM, Ravenel. 



Proc. Philad. Acad., 44. 18G1. 



Shell ovate, triangular, veiy oblique, somewhat compressed, 

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

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

 nearh' 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. 



1 have not seen this species ; it is, perhaps, a higlilj^-colored 

 G. Mortoni. 



Genus SERRIPES, Beck. 

 Verzeicli. d. Deutsch. Naturf. iu Kiel, 317. 



Aplirodit'e, Lea, Am. Philos. Trans, v. 1834. 



1. S. Grcenlandicus, Chemnitz. Fig. 458. 



{Cardium.) Conch. Cab., vi. t. 19, f. 198. 1783. 

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



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

 submedial, prominent, incurved, contiguous ; obsoletely radiatel}* 

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

 olivaceous or drab, the 3'oung with occasionall}' zigzag daiiker 

 lines ; within white or yellowish. 



Length 2.7, height 2.3 inches. 



Maine, northwards. 



Family CHAMIDyE. 



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. 



