108 JOURNAL OF THE NEW JFRSEY 



1. Lyonsia, Tur. 



Shell nearly equivalve, thin, somewhat pearly, truncated pos- 

 teriorly ; pallial line not distinct. 



Animal siphons very short, almost wholly united, fringed. 



1. I^oima hyalina, Con. Shell elongated, sub-ovate, thin, frag- 

 ile, pearly, translucent, with posterior end elongated, narrow^ 

 slightly truncated and gaping; hinge margin nearly straight, 

 the rest of the outline regularly rounded ; pallial line indistinct> 

 with no well marked sinus ; whole surface except umbones 

 covered wdth delicate, radiating, fringed wrinkles. Epidermis- 

 dirty-white. L. 18; H. 10; W. 7i; U. i. Whole coast. Low 

 water to 40 ftithoms ; thrown on the beach by storms. 

 Family 27. PANDORID/E. 



Shell inequivalve, thin, pearly inside; valves closed, narrow^ed 



behind. 



1. Pandora, Hwass. 



Shell inequivalve, thin, pearly inside; right valve flat, left 

 not very convex. 



Animal siphons very short, united nearly throughout ; orifices 

 fringed. 



1. Pandora (Clidmphora) triUneata, Say. Shell oblong-ovate, 

 ro.unded before, and wdth an upward curved, narrow, truncated 

 ? ^^ SiiTd ^ b eh in d ; the hinge margin, for nearly the length of the 

 shell, straight or concave ; right valve nearly flat, the left con- 

 vex : the edjie of the flattened valve shutting over the convex 

 one; slightly gaping at the» umb4 >. Pearly-white within, irides- 

 cent. L. 30 ; H. 16 ; W. 4^ ; U. about ^. Animal with slender 

 foot and short siphons projecting through small openings in the 

 otherwise closed mantle. — Whole coast. In sand and mud. 

 Family 28. SOLENOMYID/E. 



Represented only by the genus: — 



^ 1. SoLENOMYA, Lam. 



Shell thin, cylindrical, gaping at each end ; epidermis thick, 

 horny, shining, extending far beyond the margins,cartilage in- 

 ternal wnth a peculiar arched or forked support; no cardinal 

 teeth. 



Animal wdth a single siphonal orifice, hour-glass-shaped and 

 serrated ; foot proboscis form, truncated and fringed at the end. 



