116 PROCEEDINGS OF THE ACADEMY OF [Jan.,. 



the dacty]oi)odite. Fixed finger rather slender, with a series of 

 coarse tubercles (worn flat) along its grasping edge. 



Dactylopodite armed with a short conic spine near its base 

 (continuing the row of similar spines on the upper margin of the 

 propodite), its grasping face with a series of coarse tubercles, 

 worn flat. 



Carpopodite (?) irregularly cylindrical, gibl)0U3, a little com- 

 pressed and faintly grooved along the outer side, bearing a series 

 of several short spines along the inner. 



Abdominal somites (PI. I, figs. 13, 14) with highly arched ter- 

 gum, the surface punctate. 



Lower Marl beds, Lenola, N. J. (C. AV. Johnson, Uselma C, 

 Smith); Monmouth county (William Cleburne). Also deep cut 

 of the Delaware and Chesapeake canal. 



Cotypes are No. 527 Coll. A. N. S. and 5,941 Coll. Wagner 

 Institute, from Lenola, N. J. 



This species is based upon a right hand and group of four 

 abdominal somites in the collection of the Academy of Natural 

 Sciences of Philadelphia, and a right hand and carpopodite (?) 

 in that of the Wagner Free Institute. The fixed finger is broken 

 in both specimens, and the proximal portion of the hand is wanting. 

 In the Wagner Institute specimen the base of the dactylopodite 

 remains. 



A much smaller propodite from Monmouth county, N. J., shows 

 a series of four short spines along the upper margin; but perhaps 

 this specimen belongs to an alliea but distinct species, as it is much 

 less convex inside than the larger claws. In the large specimens 

 from Lenola only the anterior two spines remain, as described 

 above, owing to the loss of the posterior portion of the hand. 



On account of the mutilated condition of the remains, measure- 

 ments cannot readily be given; but an Astacoid somewhat larger 

 than the common Eastern crayfish is indicated. The figures are 

 of the natural size. The high arch of the abdomen may be parti v 

 due to lateral compression. Until further remains come to light, 

 and especially the cephalot borax, the generic position of the species 

 will be uncertain. It is named in honor of William M. Gabb. 

 Hoploparia gladiator n. sp. PI. I, figs. 15, 16. 



Propodite long and narrow, parallel sided, its thickness more 

 than half the width, about equally' convex on the two sides, 



