60 KANSAS UNIVERSITY SCIENCE BULLETIN. 



longidigitus , Ark. 



difficilis, I. T., Ark. 



meekii, Ark. 



erichsonianus , Ala., Tenn. 



alabamensis, N. Ala. 



compressus, N. Ala. 



medius, Mo. 



rusticus, Ala., Ark., 111., Ind., Iowa, Kan., Ky., Mich., Mo,, 



Ohio, Pa., Tenn., Tex., Wis. 

 sjjinosMS, N. Ala., Ga., N. C, S. C, Tenn. 

 putnami, Ind., Ky., Tenn. 

 forceps, N. Ala., Va. Tenn. 

 digueti, Mex. 



Group V. 

 C. montezumse, Mex. 



montezumse dugesii, Mex. 

 montezumse areolatus, Mex. 

 moiitezum^x occidentalis, Mex. 

 shufeldtii, La. 

 chapalanus, Mex. 



PARASITISM IN CAMBARUS. 



According to Moore ('93), various writers have discussed the 

 Discodrilidne parasitic on the Fiuro-pesin Astacus fiaviatalis, and 

 Whitman has considered those living on the crayfishes of Japan. 

 He finds that our American forms carry about a "heterogeneous 

 burden of leech-like parasites (or messmates?)," C. bartonii 

 being affected by at least four easily distinguishable forms, 

 Avhile other and difi'erent forms have been found on C. afjinis, 

 and on a Cambarus sp. inhabiting the larger mountain streams 

 of North Carolina. He presents descriptions of the species and 

 some notes on their place of occurrence. The species and notes 

 of interest in this place are the following : 



Branchiobdella illuminata Moore, sp. nov. Very common, 

 being found in the branchial chambers, which it never appears 

 to leave except at the time of molt, during the life of the cray- 

 fish in nearly one-half the larger individuals of C. bartonii ex- 

 amined. Cocoons found throughout the year attached to the 

 branchial filaments, especially the inner ones. Philadelphia, 

 Pa., and Watauga county. North Carolina. 



B. pulcherrima Moore, sp. nov. Cocoons usually attached to 



