CRUSTACEA. 



Crustacean remains are extremely rare in the California Cretaceous ; fragments 

 iff but three species having yet been encountered. PI. 19, fig. 1, represents a 

 carapace of a small crab, a unique specimen from Martinez, discovered by Mr. 

 Mathewson, in a coarse-grained gray sandstone. Figures 2, a-f, are three frag- 

 ments of claws, remarkable for their long, slender form. Dr. Stimpson concurs 

 with me in the belief that they all belong to the same species, though they vary 

 much both in size and shape. They are from a dense gray claystone, associated 

 with Ptiloteuthis foliatus and Diplychoceras Icevis, from the vicinity of Cottonwood 

 Creek, Shasta County. 



CALLIANASSA, Leach. 

 C. Stimpsonii, Gabb. 



PI. 19, Fig. 3. 

 (Callianassa Stimpsonii, Gabb ; Pal. Cal., Vol. 1, p. 57, pi. 9, fig. 1, a, b, c.) 



Pigure 1 b, above quoted, was unfortunately so misrepresented by the artist as 

 not only to be unrecognizable, but also to give an entirely incorrect idea of the 

 shape. This was due to the original drawing representing the two upper angles 

 broken away, and the lithographer having substituted a curved line in the place 

 of the broken one in my drawing. The present figure is from the same sketch, 

 with the sole addition of the probable outline being restored. 



(127) 



