444 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 85 



and a tiny protuberance on which the minute, primarily spermathecal 

 pore is located. This protuberance does not appear to be definitely 

 demarcated as are the genital markings. Closely associated with 

 each spermathecal chamber are one or two stalked glands. Tlie stalk 

 of the median gland passes into the parietes at the side of the 

 spermathecal chamber and to the genital marking visible externally 

 just at the mouth of the chamber. The stalk of the posterior gland 

 passes into the posterior wall of the chamber and to the genital 

 markmg that is deepest within the chamber. A third gland when 

 present may be lateral or anterior to the spermathecal chamber. If 

 only one gland is present it is always posterior. The stalks of the 

 glands may be short and practically confined to the body wall or 

 much longer and with a definitely coelomic portion. The junction 

 of the spermathecal duct and the dorsal face of the spennathecal 

 chamber is covered over with connective tissue and unless this tissue 

 is dissected off the duct has the appearance of passing into the 

 parietes undiminished in diameter. 



(Note: As the spermathecal pore invagination appears to pass 

 through the parietes into the coelomic cavity the invagination is 

 called a spermathecal chamber, but the chamber is small, especially 

 in comparison with that of P. grahami. ) 



Retnarl's. — The Hamburg specimens are very stiff and brittle, the 

 body wall so transparent that recognition of the external charac- 

 teristics is difficult. The brittleness was overcome by a short period 

 of soaking in water, but prolongation of the soaking results in a 

 gelatinization of the organs. 



On the smallest aclitellate specimen the male pore areas are small, 

 transversely oval patches in the setal circle, which are not clearly 

 demarcated from the neighboring portion of the ventral surface. 

 The male pores, however, can be recognized at the centers of these 

 areas. On a slightly larger specimen the margin of each male pore 

 area is clearly demarcated, except mesially, by a crescentic or U- 

 shaped furrow, the concave side of the crescent or of the U facing 

 midventrall3\ The deepening of this furrow produces the parietal 

 invagination which is also crescentic to U-shaped in section. The 

 fe-ites of the spermathecal apertures on the aclitellate specimens are 

 represented by tiny, almost minute, depressions on the interseg- 

 mental furrows. 



One of the U. S. National Museum specimens is abnormal, having 

 a prostate, duct, and male pore invagination in segment xix rather 

 than xviii on the left side. 



In one of the Hamburg specimens there are a number of coelomic 

 nematodes. In four of the U. S. National Museum specimens there 

 are numbers of gregarinoid Protozoa in the coelomic cavities through- 



