CHINESE EARTHWORMS — GATES 



431 



other side (1 specimen), a pair of medium-sized prostates with 

 ducts (1 specimen), a pair of fully developed prostates with ducts 

 (2 specimens). 



Remarks. — Stephenson's specimen of P. divergens is quite clearly 

 P. diffnngens. One of the three paratypes of Chen's P. corrugata 

 also is rather obviously to be referred to P. diffringens. 



A specimen from Tatsienlu with normal prostates is heavily in- 

 fested with nematodes. The worm has a pair of large pseudovesicles 

 in xiii. 



PHERETIMA EXILIS Gates 



1935. Phcrctinia cxllis Gates, Smitbsoniau Misc. Coll., vol. 93, no. 3, p. 7 



(type locality: Suifu, Szechwau; type in U. S. National Museum). 



1936. Pheretima exllis Chen, Contr. Biol. Lab. Sci. Soc. China, zool. ser., 



vol. 11, p. 294 (after examination of type). 



Material exarnmied. — From Dr. Graham: 2 clitellate specimens 

 labeled "Suifu, Szechwan, 1929." 



External charactemtics. — ^Length, 68-85 mm. Diameter, 2-2l^ 

 mm. 



The setae begin on ii, on which segment there is a complete 

 circle, and are small and closely crowded. There is no definite mid- 

 ventral gap in the setal circles; a slight middorsal gap may be 

 present. There are six ventral setae on segment xvi. Other setal 

 numbers are as follows: 



The first dorsal pore is on 12/13. 



The clitellum is annular, extending from 13/14 to 16/17; dorsal 

 pores and intersegmental furrows lacking. 



The spermathecal apertures are minute, widely separated, on tiny 

 transversely oval areas; two pairs. The pore areas appear to be on 

 the posterior margins of v and vi; ducts of several spermathecae 

 were pulled out from the parietes but without obtaining definite 

 evidence as to the exact location of the pores with relation to the 

 intersegmental furrows. 



The male pores are minute, each pore on a smooth, glistening, in- 

 distinctly demarcated area, the central portion of which is slightly 

 depressed, the depression with an open circular aperture at the 

 bottom of which the male pores are readily visible. 



