542 Illinois State Laboratory of Natural History. 



Note on Discodrilidce. — The collection sent me includes 

 three bottles of Discodrilidce comprising altogether about 

 sixty specimens of Bdellodrilus philadelphicus (Leidy) Moore. 

 This species was originally described by Leidy under the 

 name of Astacobdella philadelphica in the Proceedings of the 

 Philadelphia Academy of Sciences for 1851, page 209. 

 Some additional notes on it may be found in two papers by 

 Moore in the "Journal of Morphology," Vol. X., page 498, 

 and Vol. XIII., page 327 et seq. The Illinois specimens were 

 taken from the exterior of Cambarus diogenes and C. Han- 

 ding ii. 



University of Pennsylvania, August, 1900. 



