56 KANSAS UNIVERSITY QUARTERLY. 



No. 10. C. immunis. F. II. About two and one-lialf inches long. 

 August 31, 1900. 



One lobe sectioned. Condition about same as No. 1. 



No. 11. C.virilis. F. II. Perfectly soft from shedding. A little 

 over two inches long. September 4, 1900. 



One lobe sectioned. Seems to be abnormal. There are present, however, 

 almost mature elements, spermatids, spermatocytes, and spermatogonia. 



No. 12. C. imrmi7iis. F. II. About two inches long. August 

 24, 1900. 



One lobe and vae deferens sectioned. Condition of lobe practically same as 

 No. 1. Vas deferens contains many spermatozoa. 



No. 13. C.immnnis. F.I. Good- sized individual. Probably two 

 and one-half or three inches long. Collected in burrow, October 13, 

 1900. 



One lobe and vas deferens sectioned. Proximal part of lobe made up of 

 emptied follicles and those yet filled with mature spermatozoa. Farther back 

 are seen spermatids in various stages of transformation, some of them quite early. 

 A few follicles with spermatocytes are noted. Bordering immediately on the 

 spermatid region, or upon the scattered follicles of spermatocytes, is seen the dis- 

 tal region of spermatogonia, in which a division figure is occasionally to be noted. 



No. 14. C. innnnnis. F. I. About two and one-half inches long. 

 August 21, 1900. 



Material so badly oriented and broken up in preparation that an exact de- 

 termination of the different regions is impossible. Spermatozoa, spermatids, 

 spermatocytes and spermatogonia are found. Apparently, it is practically the 

 same condition as No, 1. Vas deferens shows considerable number of sperma- 

 tozoa. 



No. 16. C. ivimu7iis. F. I. About two or two and one-half inches 

 long. August 21, 1900. 



One lobe examined. Condition about same as No. 1. 



No. 17. C. imimuiis. F. II. About two inches long. August 

 24, 1900. 



One lobe sectioned. Condition practically same as No. 1. 



No. 18. C. immunis. F. II. About two and one-half inches long. 

 August 2, 1900. Still fairly soft from shedding. 

 Condition practically same as in No. 1. 



No. 20. C. virilis. F. I. About two and one-half inches long. 

 Collected in ice-cold water in creek, January 18, 1901. 



Sections not longitudinal, and so arrangement of regions is uncertain. Most 

 of the follicles are filled with mature spermatozoa; in some few the spermatozoa 

 are apparently not quite mature, not being massed together at the center. Fol- 

 licles containing spermatocytes, and a greater number containing spermatogonia, 

 also occur. The vas deferens contains a good many spermatozoa, but is not 

 nearly full. 



