500 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 85 



is firm, smooth, and pinkish. The seminal chamber is elongate and 

 looped, the looping usually (completely or in part) of a short, reg- 

 ularly zigzagged type. The spermathecal chamber projects con- 

 spicuously into the coelomic cavity, but the junction of the cham- 

 ber and the bulbous portion of the spermathecal duct is covered over 

 by connective tissue so that the chamber at first appears to be merely 

 a thicker ventral portion of the duct. The chamber does not, how- 

 ever, have the smooth pinkish appearance of the bulbous portion of 

 the duct. Within the chamber are two or three genital markings, 

 round or oval and similar to those in the copulatory chamber. The 

 wall is cross-hatched by furrows producing a warty appearance 

 very similar to that within the copulatory chambers. The minute, 

 primary spermathecal pore is located at the apex of a tiny, glisten- 

 ing, conical protuberance. The margin of this protuberance is not 

 definitely demarcated as is the margin of a genital marking. The 

 stalks of the genital marking glands are not as a rule confined to the 

 wall of the spermathecal chamber but project slightly from the sur- 

 face of the chamber, holding the glands erect in the coelomic cavity. 

 All spermathecal chambers of each specimen are completely retracted. 



Remarks. — The aclitellate specimen is 125 mm long; maximum di- 

 ameter, nearly 4 mm. The clitellar segments are fully setigerous 

 and without trace of clitellar glandularity. The spermathecal aper- 

 tures are open and transversely oval; through each aperture a geni- 

 tal marking is visible, the marking in the lateral part of the sperma- 

 thecal chamber. The partially everted copulatory chambers are as 

 on the clitellate specimens except that there are two round genital 

 markings in contact and near the neck. The genital markings, in 

 the spermathecal as well as in the copulatory chambers, are fully 

 developed and similar in appearance to those of clitellate specimens. 

 The conical protuberance on which the minute spermathecal pore is 

 located is not so large as in adult specimens. The male pore area 

 is also not quite so large as in clitellate specimens, though the minute 

 male pore is recognizable. 



The seminal vesicles are approximately of adult size. The testis 

 sacs are both U-shaped. The testicular coagulum extends in the sac 

 of X only halfway up the limbs of the U. There is a very thin layer 

 of testicular coagulum in the sac of xi partially surrounding each 

 seminal vesicle. The prostates and prostatic ducts are nearly adult 

 size. The spermathecal chambers are well developed and project 

 conspicuously into the coelomic cavity. The spermathecal ducts are 

 apparently fully formed. The ampullae are small and empty. The 

 diverticula are probably also fully formed, but the seminal chambers 

 are transparent. The glands on the spermathecal chambers and in 

 the prostatic region are very small. 



