1901.] NATURAL SCIENCES OF PHILADELPHIA. 115 



Measurements of propodife. — Length about 30 mm.; exclusive 

 of finger 18.5; width 1(5.5; thickness 7.6 mm. 



Crosswicks and Monmouth county, N. J., with C. mortonl 

 (Coll. A. K S.). 



In a few specimens the dactylopodite remains as a short stump 

 only. iSTo carpopodite or other part is known. Thirteen propo- 

 dites, probably belonging to as many individuals, are before me, 

 the most perfect being one of two in the collection of the Wagner 

 Free Institute of Science. 



The claw of C. conradi differs from that of C. mortoni in being 

 much shorter and broader; more evenly convex on the two sides, 

 the posterior margin of the outer side and the keel along the upper 

 edge are not abruptly deflexed behind; the fixed finger of the propo- 

 dite of C. conradi has no median tooth on its grasping face, which is 

 flat with a short smooth ridge and bounded by two crenulate 

 angles, while in C. mortoni there is a median tooth, a crenulate 

 ridge on the face, and no crenate angle along the lower inner part 

 of the finger. 



The name is in honor of Timothy Abbott Conrad, the al)lest 

 of the early expositors of the Cretaceous and Tertiary faunas of 

 the United States. 



Figured type in collection of the "Wagner Free Institute of 

 Science, No. 5,478 W. 



HOPLOPARIA McCov. 

 The following species are referred to this genus with due reserve, 

 as until the cephalothorax is known their exact position in the 

 Astacoid series must remain doubtful. The specific characters of 

 the fossils, however, may be readily appreciated ; and the definition 

 of the species may call attention to the matter and lead someone to 

 search for the missing parts. 



Hoploparia gabbi n. sp. PL I, figs. 11, 12, 13, 14. 



Right propodite robust, evenly convex on both '"sides, but 

 slightly more convex above than below, the surface slightly rough- 

 ened everywhere by small flattened, separated, scale-like asperities; 

 lower margin bluntly angular and marked by a slight groove ; upper 

 margin narrowly rounded, bearing a couple of short conic spines, 

 inserted slightly below the edge and directed downward and for- 

 ward; and on each side there is a rounded tubercle at the base of 



