490 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 85 



< Specimen with large numbers of parasitic bodies visible externally. 



• Gaps in setal circle indicate that some setae have been lost. 



' Large numbers of parasites in the coelomic cavities, the parasites not visible externally. 



* Ventral setae of .xix and some of the succeeding segments abnormally placed, possibly zigzagged; the setal 

 row apparently doubled in spots. 



The clitellum is annular, extending from 13/14 to 16/17. Inter- 

 segmental furrows and dorsal pores are lacking. Setae are usually 

 lacking; on Chen's specimen there are circular rows of setal pits on 

 xi-xvi but no setae are visible; on four specimens there are a few 

 setae midventrally on xvi. The dorsal pores on 13/14 and 16/17 are 

 functional. 



The spermathecal pores are minute, widely separated; three pairs, 

 on 6/7-8/9. Each pore is at the center of a tiny, circular to trans- 

 versely oval, smooth area the margins of which are usually not clearly 

 demarcated. The spermathecal pores are readily recognizable though 

 minute owing to the presence of a tiny whitish rim around the margin 

 of a pore. A spermathecal pore tubercle may be very slightly de- 

 pressed into the body wall. 



The apertures of the male-pore invaginations, are crescent-shaped, 

 the concave side of the crescent facing midventrally. The apertures 

 of softened specimens gape open so that a portion of the median wall 

 of the invagination is visible. The lateral wall of the invagination is 

 thin and without setae; the ventral margin of this wall forming a 

 crescentic, lateral lip of the aperture of the invagination. On one 

 specimen the invaginations are almost completely everted. 



