ANNELID GENUS CAMBARINCOLA — HOFFMAN 



315 



Figures 19, 20. — Reproductive systems, lateral aspect, of two species of the Mesochorea 

 section. 19, Cambarincola macrocephala Goodnight, specimen from Gooding Co., 

 Idaho. 20, C. holli, new species, paratype, Pulaski Co., Kentucky. Drawings to 

 same scale. 



sentially equal diameter; segment i the smallest. Body segments 

 short, as little as a fourth the diameter at midbody, as much as a half 

 at anterior end; prosomites large, about three times as long as meta- 

 somites. Caudal sucker large, its diameter greater than that of head. 



Head larger than normal for genus, as long as first three body 

 segments combmed, and about a fourth the entire length of the 

 animal, broader than the fh'st segment but considerably narrower 

 than midbody segments. Peristomium distinctly set off by a basal 

 constriction, about a third of the total head length, with four slender 

 elongate dorsal tentacles slightly removed from the peristomial mar- 

 gin, each subtended b}'^ a small rounded lobe. 



Jaws large and massive, equal in size but anisomorphic, the dental 

 formula 5-4 or 3-4. 



Male reproductive system large, occupying most of one side of the 

 coelom of segment vi as well as the mid ventral and middorsal areas. 

 Bursa large and subglobose, a little longer than broad, merging 

 entally into a short, slender, ejaculatory duct. Latter entering 

 spermiducal gland at about the middle of the segment, the gland 

 continuing dorsad for about a third of its length and then strongly 

 bent on itself and directed ventrad to the level of penial sheath where 



