878 THE AMERICAN NA TURALIST. [Vol. XXXV 1 1 . 



female. These figures are not accurate as a dense gelatinous 

 secretion in the posterior part of the atokal region makes it diffi- 

 cult to count the segments. The greatest diameter of the atokal 

 region is 4 mm. and that of the epitokal region i-ih mm. dimin- 

 ishing gradual 1\ at the anal end. and more abruptly at the junc- 

 tion of the atokal and epitokal parts. The color of the male is 



