308 



PROCEEDINGS OF THE NATIONAL MUSEUM vol. u4 



Figure 13. — Distribution of Cambarincola mesochorea. The records for Massachusetts 

 unquestionably represent an adventitious occurrence, see discussion in text, p. 310. 



equal to bursa in length, its diameter half or more the diameter of the 

 spermiducal gland. Latter long and slender, entaUy somewhat en- 

 larged and recurved ventrad over tlie bursa, the entry lobes of the 

 deferent ducts terminal and equal in size. Prostate very large, at 

 least as broad as spermiducal gland, usually of considerably greater 

 diameter, and of equal length, its ental part normally curved mesiad 

 under the gut and behind the spermiducal gland, and thus not visible. 

 In normally distended specimens both the spermiducal gland and 

 prostate lie oriented in a plane parallel to the median longitudinal 

 axis of the body and extend the entire length of the coelom of seg- 

 ment VI. 



Spermatheca rather slender, elongate, subfusiform, curving dorso- 

 lateral around the gut, expanding laterally, and attenuated to a blunt 

 ental process near the middorsal portion of the segment. 



Variation. — Despite the rather extensive distribution of this 

 species, I have been able to detect nothing of significance in the way 

 of geographic variation in body form, jaws, or reproductive system. 

 The single specimen seen from Louisiana differs somewhat from the 



