CHINESE EARTHWORMS GATES 477 



of a Stalked gland just median to the ectal end of the prostatic duct 

 indicates that two pores should be present on each area — a median 

 gland pore and a lateral male pore. 



The genital markings are small, about 1 intersetal interval wide 

 transversely ; circular to transversely oval ; each marking with a de- 

 pressed, grayish-translucent center and an opaque, whitish, protuber- 

 ent rim. Each of the midventral markings on xviii may be sur- 

 rounded by 2 or 3 concentric circular furrows. 



Presumably the grayish-translucent appearance of the central por- 

 tion of a marking is the result of the crowding closely together of a 

 number of pores, each of which has the appearance of a black dot. 

 The recognition of distinct pores is exceedingly difficult except when 

 the specimens are softened. 



Just median to the male pore tubercles (specimens G) there are 

 genital markings of similar shape and size. These markings are 

 on the area crossed by the concentric furrows and are usually lo- 

 cated between two consecutive furrows. On eight specimens there 

 are two markings near each male pore tubercle, one presetal and one 

 postsetal. On three specimens presetal markings alone are present 

 on xviii. On two specimens one of the postsetal markings is lack- 

 ing. On another specimen there are two extra presetal markings 

 on the left side and one extra presetal marking on the right side. 

 On another specimen there is an extra presetal marking on one 

 side but on the other side the male pore region has an appearance 

 very similar to if not exactly the same as that in corrugata. In this 

 worm the prostate is lacking on the side having the coirugata ap- 

 pearance. On another specimen there are two extra presetal mark- 

 ings on one side ; on the other side of xviii there are only two mark- 

 ings, in contact, both slightly sunk in a transverse depression, the 

 male pore on the lateral marking. 



The preclitellar genital markings are similar to the postclitellar 

 markings and are usually close to or in the near vicinity of the sper- 

 mathecal pores ; on the posterior margins of vii and viii and the an- 

 terior margins of viii and ix; the markings immediately behind, in 

 front of or slightly median to the spermathecal pores. 



Genital markings are usually entirely lacking on the H and I 

 specimens. One small specimen has a tiny, protuberant, and well- 

 developed genital marking immediately behind each spermathecal 

 pore. Another specimen has two pairs of tiny genital markings; 

 presetal on viii and ix, each marking nearer to the midventral line 

 than to the spermathecal pore, the markings of a pair separated by 

 an interval about equal to 2-3 intersetal distances. 



Genital markings of the other specimens are located as follows: 



