CHINESE EARTHWORMS GATES 471 



PHERETIMA PRAEPINGUIS Gates 



1935. FhereHiiia praephumi'^ Gates, Smithsonian Misc. Coll., vol. 93, no. 3, p. 15 



(type locality: Mount Omei, Szecliwan ; type in the U. S. National 

 Museum). 



1936. Fheretima praephujuis Chen, Contr. Bidl. Lab. Sci. Soe. China, zool. ser., 



vol. 11, p. 302 (after examination of type). 



Material examined.— Fvom Dr. Graham: i clilellate specimen la- 

 beled "Mt. Omei, 4,400 feet.'' 



External charaecerkytica.—LQ^^^^^x, 207 mm; a posterior portion 

 probably lacking. Diameter, 16 mm. 



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

 There is no definite midventral gap in the setal circles; the middorsal 

 gaps of variable width. Setal numbers: vii/23, viii/24, xvii/20, 

 xviii/9(+4?), xix/22, xx/93. 



The first dorsal pore is on 12/13. 



The clitellinn is annular and extends from 13/14 to 16/17; only 

 very slight traces of intersegmental furrows and dorsal pores visible; 

 circles of setal pits present on xiv-xvi but no setae visible. 



The secondary spermathecal apertures are transverse slits; three 

 pairs on 6/7-8/9; the margins of the pores finely wrinkled. 



The apertures of the male parietal invaginations are rather cres- 

 centic, but the left aperture gapes open so widely that some of the 

 structures within the invagination are visible from the exterior. The 

 invaginations are deep but confined to the body wall; the lateral 

 wall of the invagination thin, lacking setae. The ventral margin of 

 the thin lateral wall forms a rather crescentic lip at the lateral side 

 of the aperture into the invagination. The minute male pore is on 

 the ventral face of a smooth, glistening, protuberant tubercle, which 

 is located dorsally in the lateralmost portion of the invagination. 

 The median wall of the invagination is raised into a slight ridge 

 on which is located a single circular tubercle, the latter near to but 

 not in contact with the male pore tubercle. At the center on the 

 ventral face of the tubercle several grayish porelike markings are 

 visible. On the median wall of the invagination near the aperture 

 and anterior to the ridge is a transversely oval genital marking, with 

 a grayish, translucent, central portion and a raised opaque rim. The 

 })resetal marking is about three times the size of the tubercle on the 

 ridge. 



The external genital markings are presetal; three pairs, on vii-ix. 

 Each marking is transversely oval, circular or longitudinally oval, 

 located on the anterior margin of the segment just median to the 

 secondary spermathecal pore. The markings are not .sharply de- 

 marcated, but a central portion of a grayish, translucent appearance 

 and a slightly protuberant, opaque rim can be distinguished. 



