CHINESE EARTHWORMS GATES 



461 



Originale. Soochow. Biol. Station leg."; 4 specimens from a tube 

 labeled ''Pheretima {Ph.) pingi Steph. Soocliow. Biol. Station leg." 



External chti^racfet^^tics.— Length, to 220 mm. Diameter, to 10 mm. 



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

 The setal circles are unbroken midventrally ; a slight middorsal 

 break may be present. Setal formulae of 7 specimens are as follows, 

 the first four from the tube labeled P. plngl: 



The first dorsal pore is on 12/13 (7 specimens). 



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

 pores, intei-segmental furrows, and setae lacking. 



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

 on 6/7-8/9. 



Each minute male pore is located at tlie center of an area of 

 grayish translucent appearance. The area is rather small and ap- 

 proximates to elongate-oval in outline. The whole of the male pore 

 area may be visible on the ventral face of a male porophore, with a 

 slight suggestion of a lij) just lateral to the area, or the area may be 

 slightly sunk and the lip more evident or the area may be more 

 deeply sunk in the parietes and invisible from the exterior, com- 

 pletely covered over by a lateral lip. On each male pore area there 

 are four tiny circular markings, anterior, posterior, lateral, and 

 median to the, male pore. The anterior and posterior markings are 

 slightly larger than the other two. The margins of the markings 

 are rather definite but can be recognized as such only with brilliant 

 illumination and high magnification. 



Tlie male porophores are broad low protuberances approximating 

 to circular in outline and extending across xviii and slightly onto 

 xvii and xix. The ventral face of a porophore may be rather flat 

 or a lateral portion on which the male pore area is located may be 

 especially protuberant. On the ventral face of the porophore median 

 to the male pore area are four sharply defined, circular, grayish- 

 translucent genital markings, each of which is larger than the mark- 

 ings on the male pore area. 



