452 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 85 



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

 labeled "Suifu, 1922"; 1 aclitellate specimen labeled "Suifu, Decem- 

 ber 7-10." 



External cfiaracteristics. — Length, 60-85 mm; the longer of the 

 two specimens is incomplete posteriorly. Diameter, 2i/^-5 mm. 



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

 The setae are small, closely crowded, and difficult to count; the setal 

 circles unbroken either at the midventral or middorsal lines. The 

 setal numbers are as follows, the first of the two specimens being the 

 clitellate : 



Tlie first dorsal pore is on 12/13 (2 specimens). 



The smaller specimen is apparently fully clitellate, the clitellum 

 annular, extending from 13/14 to the setae of xvi. Intersegmental 

 furrows and dorsal pores are lacking; setae present on xvi at least 

 ventrally, a few scattered setae on xiv and xv. There is no trace of 

 clitellar glandularity on the larger specimen. 



The spermathecal pores are minute, widely separated, one pair, on 

 5/6, on tiny tubercles. 



The male pores are minute, each at the center of a small, oval, con- 

 vex, smooth-surfaced tubercle. On the tubercles of the clitellate 

 specimen there is a slight transverse central furrow. At the lateral 

 margin of each tubercle is a thin fold of tissue that can be drawn 

 mesially over the tubercle like an eyelid. 



The genital markings are paired, on xvii, presetal, extending from 

 the setae to 16/17, each marking elongate-oval to almost circular, 

 slightly elevated, with smooth, flat surface, about 6-8 intersetal in- 

 tervals wide, separated from the other marking by a midventral dis- 

 tance equal to 10-12 intersetal intervals. On the clitellate specimen 

 there is an additional asymmetrical marking, presetal, on the right 

 side of xvi. 



Infernal atmfomy. — Septa 6/7-9/10 are all present and thickly 

 muscular; 10/11-13/14 are strengthened but membranous. 



The gizzard is in viii. There is a slight but lobed glandular col- 

 lar on the esophagus in ix just behind 8/9. The intestine 

 begins in xvi. The intestinal caeca are simple, long; the dorsal and 

 ventral margins smooth. 



In segment ix there is a pair of large, heartlike, blood-filled com- 

 missures, passing ventrally from the supraesophageals. In the same 



