304 CALIFORNIA ACADEMY OF SCIENCES. 



species are present and somewhat similar to those of the 

 other forms. 



Spermathecce (figs, i, 13, 14, 15, 16 and 17). There are 

 two pair of spermathecas situated in somites viii and ix. 

 While in Ocnerodrilus and presumably in Gordiodrilus, 

 the spermathecas open in front of and in line with the 

 ventral setse, we find them in our new species of Kerria 

 opening in line with the lateral or outer pair of setas. 

 Judging from Beddard's figure of Kerria halofhila 

 the spermathecce open in front of the inner couple of 

 set« though this is not so stated. There appears to be no 

 diverticula in this species, but the spermatheca; are very 

 large and appear to well fill the somites. In other 

 respects they resemble those of our species, with the 

 glandulous part very large and sac-like and the muscular 

 part narrow and short. 



The anterior pair of spermathecse or those in somite viii 

 are generally the smallest. They may be of equal size 

 with those in somite ix but they are generally smaller, never 

 larger. In shape the spermathecee vary considerably, 

 also in size. They are, however, comparatively large and 

 very conspicuous. Each spermatheca consists of two 

 distinct parts, one pointing towards the interior of the 

 somites, being sac-like inflated and very much wider 

 than the narrow tube-like and muscular part which con- 

 nects the former with the body-wall and opens out in the 

 intersegmental grove in front of the outer setse. To 

 these principal parts may be added a generally three- 

 lobed diverticulum which is situated on one side of the 

 spermatheca. This diverticulum is not always developed, 

 and is besides variable in form and size. It is generall}'^ 

 present on the spermatheca in somite ix, but is also often 

 found on those in somite viii. Sometimes it is, however, 

 of diminished size, or merely suggested by a sac-like 



