CHINESE EARTHWORMS GATES 



475 



1 specimen labeled "Suif u, water specimens, May 24, 1928" ; 1 specimen 

 labeled "Suif u." From the U. S. National Museum : 2 clitellate speci- 

 mens (I) labeled ^^Pheretima corrugata Chen (paratypes), Kia-Ting, 

 Szechwan. Y. Chen." 



Extenml characteristics. — Length, 33-36 mm (E), 125 mm (G), 

 85-120 mm (H). Diameter, 2 mm (E), 4-61/2 mm (G), 21/2-6 mm 

 (H). 



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

 A midventral gap, when present, is slight, a middorsal gap present 

 or lacking. The setae of ii-ix, at least ventrally, are enlarged. En- 

 larged setae from several specimens (including a paratype of P. 

 corrugata) have been examined microscopically. The shaft is almost 

 straight, the ectal tip ornamented with short, transverse rows of 

 very fine spines. The setal numbers are as follows : 



> Wide ventral break with setal pits, if pits are counted as setae the number is 22. 



' The epidermis damaged midventrally, the number possibly should be increased by 2 or 3. 



