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 

 obsoletel y 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 r and a little white ; margin crenulated. 



Length 18, height 20 mill. 



Charleston, S. C. 



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

 G. Mortoni. 



Genus SERRIPES, Beck. 

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

 Aphrodite, Lea, Am. Pkilc-9. Trans, v. 1834. 



1. S. Grcenlandicus, 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 danker 

 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. 



