14 



ORTMANN 



form ; the inner part is drawn correctly, showing the setiform 

 tip and the horny spine ; this spine, however, is drawn triangu- 

 larly-single-pointed, while it is really slightly procurved and 

 two-pointed. The outer part is represented in this drawing by 

 a blunt, conical process, while actually it resembles the con- 

 dition seen in the male of the second form, being concealed by 

 the inner part with the exception of the swollen anterior margin, 

 which projects slightly. Fig. 5 (outer view of same organ) is 



Fig. 3. Cambarus cubensis Sauss. a, First pleopod (left side) of male (II), 

 outer view; b, the same, inner view; c, tip of same organ of male (I), inner 

 view; d, annulus ventralis of female. All figures enlarged. 



quite unintelligible ; the tip of the outer part is not correctly 

 represented, while the horny process is much too thin and is 

 recurved, instead of procurved. 



That the differences between Faxon's figures and our speci- 

 mens are due to incorrect rendering of the object by the draughts- 

 man, is evident from the fact that it is impossible to reconcile 

 the different views (inner and outer) of the same object. Correct 

 figures of the organ in question are submitted here. 



Thus the copulatory organs of C. cubensis clearly belong to 

 the type of the subgenus Procambarus ; the outer part has no 

 terminal horny teeth, but is soft and blunt ; the inner part is flat- 



