MARYLAND GEOLOGICAL SURVEY 701 



Family PSAMMOBIIDAE 



Genus SOLYMA Conrad 

 [Am. Jour. Conch., vol. vi, 1870, p. 75] 



Type. Solyma lineolatus Conrad. 



" Two direct approximate teeth under the apex of right valve. The 

 anterior tooth thick and rounded anteriorly. This genus is allied to 

 Leptosolen Conrad, but wants the internal rib of that genus and differs 

 also in having two teeth in the right valve." Conrad, 1870. 



Shell equivalve, inequilateral, thin, transversely ovate in outline; an 

 obtuse posterior carina more or less obscurely developed; external surface 

 feebly sculptured concentrically; pallial sinus apparently profound. 



If Weller was right in his observation on the pallial sinus of the type 

 species the genus would be allied to the Psammobiidce rather than with 

 the Solenidce. Restricted in its known distribution to the Upper Cre- 

 taceous. 



SOLYMA LINEOLATA Conrad 

 Plate XXXVI, Figs. 20, 21 



Solyma lineolatus Conrad, 1870, Am. Jour. Conch., vol. vi, p. 75, fig. 9. 

 Solyma lineolatus Gabb, 1876, Proc. Acad. Nat. Sci., Phila., p. 305. 

 Solyma lineolatus Tryon, 1884, Struct, and Syst. Conch., vol. iii, p. 134, pi. 



cv, fig. 89. 

 Solyma lineolata Whitfield, 1885, Mon. U. S. Geol. Survey, vol. ix, p. 182, 



pi. xxv, figs. 11-13. 



Solyma lineolata Johnson, 1905, Proc. Acad. Nat. Sci., Phila., p. 17. 

 Solyma lineolata Weller, 1907, Geol. Survey of New Jersey, Pal., vol. iv, p. 



629, pi. Ixxi, figs. 3-5. 



Description. " Equilateral, ventricose, substance very thin ; anteriorly 

 slightly contracted, end margin rounded; posterior margin obtusely 

 rounded ; uinbonal slope rounded ; ventral margin nearly straight in the 

 middle ; disk ornamented with minute and very closely arranged lines. 

 Length 1| in., height f in. The figure represents the hinge of the right 

 valve. Left valve unknown." Conrad, 1870. 



Type Locality. Haddonfield, New Jersey. 



"The dimensions of the type specimen are: Length 26 mm., height 

 15.5 mm. Shell subquadrangular in outline, a little broader behind than 



