ARTHROPODA. 851 



(I49> 195 )> near Jacobstown (150) ; Tinton beds, Tinton Falls 

 (no), Beers Hill cut, south of Keyport (129^, 129^), near 

 Freehold (132). 



Geographic distribution. — New Jersey. 



Callianassa conradi Pilsbry. 



Plate ex., Figs. 18-22. 



1901. Callianassa conradi Pilsbry, Proc. Acad. Nat. Sci. Phil. 

 (1901), p. 114, pi. I, figs. 8-10. 



Description. — "Propodite rhombic, its length (without finger) 

 not much exceeding the width, somewhat more convex on the 

 outer than on the inner face, the posterior margin neither abruptly 

 nor deeply deilexed. Surface smoothish, with some small 

 tubercles on each side of the slight excavations on both sides 

 of the hand near the commissure between the bases of the fingers ; 

 the acute lateral edges crenulate, as in C. mortoni, but the lower 

 edge is not deflexed posteriorly as in that species. Fixed -finger 

 triangular in section, the- angles crenulated, the flat, grasping 

 face with a short smooth rib near the base, which joins the keel 

 along the outer angle of the finger." (Pilsbry.) 



The dimensions of a propodite are : length, about 30 mm. ; 

 length, exclusive of the finger, 18.5 mm. ; width, 16.5 mm. ; thick- 

 ness, y.6 mm. 



Remarks. — "The claw of C. conradi differs from that of C. 

 mortoni in being much shorter and broader; more evenly con- 

 vex 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 propodite 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." (Pilsbry.) 



Formation and locality. — Tinton beds, Tinton Falls (no), 

 Beers Hill cut (129"). 



Geographic distribution. — New Jersey. 



