1869.J 143 [Perkins. 



CORBVUDM. 

 Corbula Brug., 1792. 



Corbula COntraeta Say, Am. Couch., p. 103, 1822; Gould, In- 

 vert. Mass., p. 43, fig. 37; De Kay, Moll. N. Y., p. 241, pi. xxviii, 

 fig. 285. 



Not common. I have dug it up alive from sand at low water, near 

 Savin Rock. 



ANATINIDiE. 

 Lyonsia Turton, 1822. 



Lyonsia hyalina Conrad, Journ. Acad. Nat. Sci. Phil., Vol. 

 vi, p. 261. Osteodesma hyalina Gould, Invert. Mass., p. 46, fig. 31; 

 De Kay, Moll. N. Y., p. 234, pi. xxxiii, fig. 311. 



Not common ; very rarely found alive. 



PANDOKIDiE. 



Clidiophora Carpenter, 1864. 



Clidiophora trilineata Carp., Proc. Zool. Soc. Lond., 1864. 

 Pandora trilineata Say, Am. Conch., pp. 89, 151, pi. ii; Gould, Invert. 

 Mass., p. 44; De Kay, Moll. N. Y., p. 239, pi. xxxiii, fig. 310. 



Abundant in mud in a few feet of water, and often on the shore. 

 Animal light brown; in April and May with ova; mantle closed; 

 gills rather long, narrow, deeply striated ; foot when contracted trun- 

 cate before, curving to a point behind ; when extended tongue-shaped 

 and pointed ; when directed straight downwards, or when directed 

 forward, rhomboidal, white; palpi very small, triangular; siphons 

 united except at the end, scarcely extended beyond the shell, white, 

 thickly spotted with red and black, fringed with few and blunt 

 papilla?, about fourteen around the dorsal and six around the ventral 

 opening, those about the former not at the end, but forming a sort of 

 collar below it. 



MEASUREMENTS. 



.4 mill. 





MEASUREMENTS. 





lgt 



h of shell 20 mill. Breadth 12 mill. Height 



u 



foot 10 " (extended). " 



9 " 



u 



" 3.8 " (contracted). " 



6.4 " 



u 



siphons 2 " " 



5 " at shell. 



U 



palpi 1.6 " " 



1 " at base. 



