HARRIS : DISTRIBUTION OF KANSAS CRAYFISHES. 5 



wont down almost perpendicularly until they came to the sur- 

 face of a stratum of Wellington shale. Here they were enlarged 

 into almost round chambers, about ten inches in diameter and 

 not more than three inches in height. The burrows were sup- 

 plied with "chimneys" above. In these chambers the crayfish 

 were found. They were not very active or pugnacious. The 

 w T hole burrow was, of course, filled with water. The crayfish 

 had burrowed down a little ways into the rather disintegrated 

 shale. The excavations into the shale were conical, about four 

 inches in diameter at the top and four inches deep. Mr. Kin- 

 near thought that, as the shale was somewhat softened by the 

 water, the crayfish had removed it bit by bit. There were 

 about three or four of the main burrows coming from the upper 

 surface terminating in the large chambers as described above. 

 These chambers w T ere then connected by passageways running 

 from one to another. 



Two of the specimens were taken August 1, and the other six 

 August 25-27. Two w r ere males and the other six females. All 

 the females w 7 ere, with one exception, well loaded with eggs, 

 which appear, from an examination with a hand lens, to be in 

 a very early stage of development, and have probably been only 

 comparatively recently laid. 



So far as reported, this species is confined to a narrow strip 

 of territory running north for about eighty miles from the south- 

 ern boundary of the state and drained by the Arkansas river. 



3. Cambarus gracilis Bundy. 



Specimens of this species are hard to obtain, and this doubt- 

 less accounts for its few localities. It is found in the territory 

 drained by the Arkansas (1 ) as well as that drained by the Kan- 

 sas river ( 2 ) . 



In August, 1901, I found an adult female of C. gracilis in a 

 stagnant pond near Lawrence the only time I have ever taken 

 an adult specimen in open water during the summer. 



4. Cambarus diogenes Girard. 



Reported so far only from a limited territory along the Kan- 

 sas and Missouri rivers, in the northeastern part of the state. 

 As with C. gracilis, the difficulty of obtaining material probably 

 accounts for the rarity of the reports on this species. 



