436 PROCEEDINGS OF THE NATIONAL MUSEUM vou 85 



from 10/11 in a diagonal fashion, diverging from each other ante- 

 riorly. The sacs are fairly widely separated and are without any 

 apparent connection transversely. The posterior sacs (vesicles of 

 xi excluded) project anteriorly from the base of 11/12 toward 10/11, 

 which is not reached. 



The seminal vesicles are small to mediimi-sized vertical bodies, 

 paired in xi and xii, each vesicle with a dorsal primary ampulla, 

 the primary ampullae of a segment in contact dorsally over the 

 dorsal blood vessel. In segment xiii there is a pair of pseudo- 

 vesicles, which may be as large as or a trifle smaller than the vesicles 

 of xii. The prostates extend through some or all of segments xvi-xxi. 

 The prostatic duct is 3-5 mm long, bent in a U -shape, the ectal limb 

 much thicker than the ental limb. 



The spermathecal duct is not appreciably narrowed in the parietes 

 and is as long as or slightly longer than the ampulla. The diverticu- 

 lum, which passes into the duct at the parietes or just within the 

 parietes, comprises a long slenderly tubular stalk with an ental, 

 spheroidal, or asymmetrical seminal chamber; the diverticulum 

 longer than the combined lengths of duct and ampulla. 



Remarks. — In one of the Tatsienlu specimens there are numerous 

 parasitic bodies in the coelom. 



In xiv, of the Dawei specimen, there is a pair of fairly large 

 stalked pseudovesicles. The ovoidal portion at the dorsal end of 

 the stalk is brownish and has a tough, thickish rather than mem- 

 branous, wall. The brownish material within the vesicles comprises 

 corpuscular bodies, setae, and nematode ova. No nematodes or coe- 

 lomic Protozoa were found. 



Setae as well as nematode ova have been found previously in the 

 pseudovesicles of xiv (see, for instance. Gates, 1932, pp. 479-480). 



P. fomicata is distinguished from P. hongkongensis Michaelsen, 

 1910, by the dorsal gap in the setal circle of ii, the absence of genital 

 markings, and the exclusion of the anterior seminal vesicles from the 

 testis sac of xi. 



According to Chen (1936, p. 298) P. fomicata "is probably iden- 

 tical with P. fingi Steph." P. fomicata is, on the contrary, clearly 

 distinguished from P. pingi by the horseshoe-shaped testis sacs of x 

 and xi. Chen, however, thinks that the testis sacs are "connected 

 ventrally and communicated" rather than as described above. Even 

 if the ventral ends of the "horseshoe-shaped testis sac" are in com- 

 munication as Chen suspects, the annular testis sac thus formed will 

 still distinguish fomicata from pingi. 



