MEXICAN, CENTRAL AMERICAN', AM) CUBAN CAMBARI 5 



irregular, strong tubercles ; tips horny, and generally another 

 horny tooth a short distance from tip on cutting edge of the im- 

 movable finger. 



Carpopodite short, with a longitudinal sulcus above, granu- 

 lated and tuberculated ; tubercles forming one or two spines on 

 distal end of inner margin, and two other spines on lower sur- 

 face, one on anterior margin, the other at the lower articulation 

 with the hand. Meropodite granulated, but almost smooth on 

 the larger portion of outer and inner face ; several strong tuber- 

 cles at distal end of upper margin ; inner and outer lower 

 margins each with a row of strong, spiniform tubercles, the 

 outer row shorter. All the tubercles of the chelipeds appear 

 squamiform on account of a fringe of short, stiff hairs at their 

 anterior edges. 



Ischioftodite of fourth fierct'oflods with a strong hook ; this 

 hook has a subcompressed, broad base, and is subcompressed, 

 but narrower at the tip, and is slightly twisted. The ischiopo- 

 dite of the third pereiopods is without hook, and there is only 

 a slight, almost imperceptible elevation at its inferior margin. 



Fig. i. Cambarus paradoxus, sp. n. First pleopod (right side) of male (I). 

 a, outer view; b, inner view. Enlarged about tour times. 



First pleopods (see Fig. i) reaching to the middle of the bases 

 of the third pereiopods, stout, slightly curved backward ; inner 

 and outer parts subequal, in close apposition to the tips. Both 

 tips curved gently backward, and slightly outward, horny ; 

 inner part, on posterior margin, at a short distance from the tip, 

 with a strong, spiniform process, going off at an acute angle, 

 and being longer than the two tips of this organ. 



Male of the second form : Tips of inner and outer parts of 



