172 SYSTEMATIC PALEONTOLOGY 



fragments distinguished with difficulty from the fragments of elytra. 

 They occur in the Talbot formation at Bay Eidge, a few miles below 

 Annapolis. 



Some of the better preserved fragments are shown on Plate XL, 

 Fig. 3. Pig. 3a is apparently the outer front part of the left elytra 

 or wing case. The border is smooth and slightly thickened. Striae 

 are wanting, and the surface is minutely pitted. The part preserved is 

 1.5 mm. long and slightly more than 1 mm. wide. The second specimen 

 has much the resemblance of a pronotum. The front edge is uniformly 

 curved and slightly thickened. Crushing has obscured the posterior 

 edge, but it appears to be essentially complete, and shows pitting similar 

 to that on the tegmina. The specimen is approximately 3.5 mm. wide 

 by scarcely 2 mm. from front to back. A few additional specimens show 

 indeterminable fragments of elytra. 



Class CRUSTACEA. 



Superorder MALACOSTRACA. 



Order DECAPODA. 



Suborder BRACHYURA. 



Superfamily CANCROIDEA. 

 Family CANCROIDAE. 



Genus CALLINECTES Stimpson. 



Callinectes sapidus Eathbun. 



Plate XLI, Figs. 1-3. 



Callinectes sapidus Rathbun, 1896, Proc. U. S. Nat. Mus., vol. xviii, pp. 

 352-354, pis. xii, xxiv, fig. 1; xxv, fig. 1; xxvi, fig. 1; xxvii, fig. 1. 



Description. — " Adult. Carapace moderately convex. Granules of me- 

 dium size, crowded on the inner branchial and cardiac regions, scattered 

 and faintly marked on the anterior half of the carapace. The length of 



