CHINESE EARTHWORMS — GATES 



441 



1 Aclitellate. 



» Several gaps in which setal pits are visible but apparently no setae in the pits. 



The first dorsal pore is on 12/13 (29 specimens). 



The clitelhim is annular, extending from 13/14 to 16/17; setae 

 lacking on fully clitellate specimens, present ventrally on one par- 

 tially clitellate specimen. Functional dorsal pores or nonfunctional 

 porelike markings and slight indications of intersegmental furrows 

 are visible on several specimens on which the clitellar glandularity 

 may not have reached full development. There are functional dorsal 

 pores on 13/14 and 16/17. 



The secondary spermathecal pores are transverse slits opening into 

 deep pits, 3 pairs, on 6/7-8/9. 



The apertures of the male pore invaginations are crescentic, the 

 concave side facing midventrally. In many of the rather soft Nan- 

 king specimens the apertures gape open, disclosing more or less of 

 the median wall of the invagination. The invaginations are rather 

 shallow. The lateral lip or wall is thin and lacks setae. The median 

 wall of the invagination is firmer than the lateral wall and is ridged, 

 the ridge in line with the male setae and cut up, as a rule, by short 

 furrows into fine lobes. On these lobes or between the lobes there 

 are setae, usually 2-3 in each invagination, which have been in- 

 cluded in the male setae in the preceding table. The setae are 

 0.49-0.61 mm long, straight or slightly sigmoid, with a slight bend 

 (^f the ental ends, the ectal tips narrowing gradually to a bluntly 



