240 BULLETIN OF THE MUSEUM OF COMPA11ATIVE ZOOLOGY. 



LIST OF DIAGRAMS. 



PLATE I. 



Fig. 1-3, 7. Cambarus setosus Fax. 



Fig. 4-6. C. Bartonii Fabr. ; Gir. 



Fig. 8-10. C. virilis Hagen. 



Fig. 12-14. C. pellucidus Tellk. ; Gir. 



Fig. 11,15. C. hamulatus Cope; Fax. 



PLATE II. 



Fig. 1. Cambarus setosus, H times nat., ? 

 Fig. 2. Asellus Hoppince, 3 times nat. 



