638 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



range, being found from New York State south to Louisiana, and north- 

 west to Indiana and Illinois. 



According to Dr. Abbott,* this species frequents running streams 

 which have masses of vegetation growing in them ; the animal resting 

 upon the plants, usually near the surface of the water. 



Cambaeus AFFInis Brichsou. 



Astacus affinis Say, Journal Academy Nat. Sci. Philadelpliia, vol. 1, p. 163, 1317. 

 Camharus affinis Ericbson, Arcbiv filr Naturgeschichte, xii, 1346, p. 96; Hagen, 

 op. cit., p. 60, pi. 1, figs. 19-22, 84, 85 ; pi. 3, fig. 152 ; pi. 5. 



Dr. Hagen knew this species only from the Middle States and Mary- 

 land. According to Dr. Abbott, in the paper previously referred to, this 

 is the river-species in the vicinity of Philadelphia. He says, "AVe have 

 been able to find it, as yet, only in the Delaware Eiver, usually frequent- 

 ing the rocky bed, but also in fewer numbers on the mud-bottomed por- 

 tions of the river. They are usually found resting under flat stones, 

 well out from the banks of the stream, where the water is of consid- 

 erable depth. Wherever the vegetation is dense, we have failed to find 

 them ; nor have we seen anything to indicate that it is a burrowing 

 species." 



Cambaeus virilis Hagen. 



Op. cit., p. 63, pi. 1, figs. 23-28 ; pi. 2, figs. 123-132 ; pi. 3, fig. 155 ; pi. 8. 



Canada West ; Lake Winnipeg; Saskatchewan and Red Eiver of the 

 North; Ohio; Illinois; Iowa; Lake Superior; Missouri; Texas. 



Cambarus placidus Hagen. 



Op. cit., p. 65, 1)1. 1, figs. 76-79'; pi. 3, fig. 158. 



Illinois ; Tennessee ; Texas. 

 Cambarus juvenilis Hagen. 



Op. cit., p. 66, pi. 1, figs. 29-33 ; pi. 3, fig. 1.57. 



Kentucky River ; Osage River, Missouri. 

 Cambarus peopinquus Girard. 



Loc. cit., p. 83; Hagon, op. cit., p. 07, pi. 1, figs. 34-38; pi. 3, fig. 158. 



I have examined specimens of this species from as far east as Mon- 

 treal, and Dr. Hagen records it from Northern New York to Lake Su- 

 perior. It dwells in Cayuga Lake, New York ; and Professor Yerrill 

 has found it in a lake at Madison, Wis. 



It was found in abundance in the stomach of Mowhranchus lateralis, 

 at Ecorse, Mich., by Mr. J. W. Milner. 



A crawfish, found in the valley of the Saint John's and Aroostook Riv- 

 ers in Maine and New Brunsvrick, is most likely this species; but I have 

 never had specimens for examination. 



*American Naturalist, vol. vii, p. 80, February, 1873. 



