CRUSTACEA— MALACOSTRAC A. 



391 



35. C. mortoni Pilsbry. (Fig. 1693, d-f-) Cretaclc. 



Known by chelae; the abrupt deflection of the hind margin of 

 the more convex face of propodite and the downward bend pos- 

 teriorly of its upper margin are characteristic. 



Nearly throughout the Ripleyan of New Jersey. 



P^lG. 1693. a-c^ Callianassa conradi : «, right propodite ; b^ profile of left propo- 

 dite ; <r, inner face of same; d-f, C. mortoni: d, outside view of specimen retaining 

 propodite, carpopodite and mesopodite in rostrum ; e, outside view of right propodite ; 

 f, outside view of extremity of right propodite with dactylopodite, X }( • (After 

 Weller.) 



36. C. stimpsoni Gabb. CretacicP-Eocenic. 

 Fixed finger nearly as long as hand, not toothed, very slightly 



curved on inner edge ; surface minutely wrinkled, and marked 

 along upper edge by a row of about seven foramina, and by pus- 

 tules, largest and most crowded in the upper half. 

 Upper Chico? and Tejon formations of California. 



37. C. ulrichi White. Eocenic. 

 Hand quadrate, flattened, inner face less convex than outer, 



both upper and lower edges acute, the lower one mainly so and 

 finely crenulate; fixed finger shorter than the hand, and gently 

 curved, slender; movable finger larger and stronger, with a mod- 

 erately strong inner ridge, sometimes with a tooth ; surface smooth 

 or granulated along the middle, several small foramina occur in 

 the upper margin of the movable finger. 

 Lower Eocenic (Midwayan) of Arkansas. 



38. C. oregonensis Dana. Oligocenic. 

 Lower margin of hand and fixed finger straight, and denticu- 

 late ; finger narrow, arcuate, inner edge and sometimes upper 



