CHINESE EARTH WORMS GATES 



495 



1 A porelike marking on 9/10 or 10/11. 



The first dorsal pore is usually on 10/11. 



The clitellum is annular, extendino; from 13/14 nearly to 16/17; 

 intersegmental furroAvs and dorsal pores lacking; no setae visible. 

 On two specimens the clitellum does not reach to 13/14. 



The spermathecal pores are minute, widely separated; three pairs 

 (HI 5/6-7/8. 



The male pores are minute, each pore at the center of a very 

 small, indistinctly demarcated, oval area in the setal circle of xviii. 

 On this male pore area there are several tiny, slightly protuberant, 

 circular tubercles. There are usually two of these tubercles just 

 median to the male pore, one presetal and one postsetal, and a third 

 lateral to the male pore and either presetal or postsetal. In addi- 

 tion there may be 1-3 further tubercles crowded in between the male 

 pore and the lateral or median tubercles. 



Anterior to each spermathecal pore and on the posteriormost mar- 

 gin of the segment is a tiny circular tubercle at the center of which 

 there is a pore or porelike depression. This pore may be mistaken 

 for a spermathecal pore; it is often much easier to see than the 

 spermathecal pore. The spermathecal pore can be distinguished by 

 its posterior location and recognized by the very delicate iri- 

 descence of the margin of the pore, an appearance that is entirely 

 lacking around the pore of the tubercle. (If the spermathecal duct 

 is carefully pulled out from the body wall the spermathecal pore 

 is removed but not the tubercle.) Four specimens have no further 

 genital markings. A fifth specimen has a pair of tubercles on viii, 

 presetal in position, nearer to the setae than to the intersegmental 

 furrow and to the midventral line than to the spermathecal pore, 

 while on the left side of vii and in line with the left tubercle of viii 

 there is a single presetal tubercle. 



A sixth specimen has a pair of tubercles on xviii close to the mid- 

 ventral line and to the intersegmental furrow 17/18 and a single 

 tubercle on xix close to 18/19 and just to the left of the midventral 

 line. This specimen also has a single presetal tubercle on viii close 

 to the midventral line and the setae. Another specimen, which is 



