CHINESE EARTHWORiMS GATES 459 



pore invaginations may be deepened, possibly but not probably 

 developing into spermathecal chambers. The development of the 

 copulatory chamber from a parietal invagination like that char- 

 acteristic of certain species, such as P. tschiliensh Michaelsen, 1928, 

 is noteworthy. 



P. paeta is distinguished from P. omebiiontis by the copulatory 

 chambers and even in young aclitellate specimens by the parietal male 

 pore invaginations. From P. schmardas (Horst, 1883) P. paeta is 

 distinguished by the invaginate spermathecal pores, the median loca- 

 tion of the copulatory chamber glands, and the presence of pre- 

 clitellar genital markings. A satisfactory diagnosis of P. paeta 

 cannot, of course, be given until fully clitellate specimens have been 

 available for study. 



PHERETIMA PAPILLIFERA Gates 



1935. Pnerethna papillifera Gates. Smithsonian Misc. Coll., vol. 93, no. 3, p. 13 



(type locality: Yacbow, Szechwan; type in the U. S. National Museum). 



1936. Pheretima papiUifera Chen, Contr. Biol. Lab. Soi. Soc. China, zool. ser.. 



vol. 11, p. 300 (after examination of type). 



Material examined.— From Dr. Graham: 1 clitellate specimen 

 labeled "Near Yachow." 



External charaGterlstics.— Length, about 100 mm. Diameter, 4 mm. 



Setae begin only on iv, on which segment there are but a few scat- 

 tered ventral setae. There are middorsal gaps of varying width in 

 the setal circles and a fairly regular but slight midventral gap. 

 The setae are small and closely crowded, but with frequent asetal 

 gaps. Setal formula : vi/11 +, vii/13 +, xvii/8 +, xviii/10, xix/10, 

 ■Kx/ca. 41 (+ denotes asetal gaps). 



The first dorsal pore is on 11/12. 



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

 segmental furrows and dorsal pores lacking; no setae visible. 



The spermathecal apertures are minute, widely separated, three 

 pairs, on 5/6-7/8. 



The male pores are minute. On the left side the male pore is at 

 the center of a circular, smooth area, which is demarcated by a slight 

 furrow. No definite male pore area can be discovered on the right 

 side. 



The genital markings are circular, about l-iy2 intersetal intervals 

 wide, presetal, fairly closely paired, one pair on each of segments 

 xi-xiv. The last pair are in contact with the whitened, transversely 

 oval area on which the female pore is located. 



Internal miatomy.—Seiptii 5/6-7/8 and 10/11-12,/13 are thickly 

 muscular; 8/9-9/10 lacking. 



