CHINESE EARTHWORMS GATES 481 



vessel, the primary ampullae small, more or less spheroidal and 

 sunk into the dorsal margins of the ventral parts of the vesicles. 



In one specimen the vasa pass posteriorly in the usual fashion, 

 but the canal is unusually fine in part and nonexistent or at least 

 unrecognizable in part. In another specimen each vas of a side 

 can be traced from the prostate anteriorly to xv in a normal fashion. 

 In the latter segment (on each side) the vas bifurcates into two 

 discrete portions, which are separate through xiv and xiii. At the 

 posterior face of 12/13 the separated portions again come into con- 

 tact and then project through 12/13 slightly into xii. The terminus 

 of the combined deferent ducts (of a side) in xii is club-shaped and 

 firm. There are paired male funnels in the testis sacs of x and xi but 

 no deferent ducts pass posteriorly from these funnels. 



The spermathecal diverticula may not be differentiated into stalk 

 and diverticulum, or the ental portion of the diverticulum may be. 

 widened but without the thin wall and large lumen of the seminal 

 chamber. In only one specimen is there iridescent material in the 

 seminal chambers. In this worm (the specimen with genital mark- 

 ings and large seminal vesicles) the elongated ellipsoidal seminal 

 chamber is definitely marked off from a shorter stalk, but the 

 spermathecal ducts are very short, almost rudimentary. The semi- 

 nal chambers of other worms are filled with grayish or pinkish 

 transluscent material or a watery fluid. 



It is unfortunate that so few normal specimens of P. rohusta have 

 been available for study. Specimens G, however, from Szechwan, 

 in spite of their abnormalities, can be referred with but little doubt 

 to rohmta. Specimens H from Szechwan, also abnormal, presented 

 a greater difficulty because of the invaginate male pores. On finding 

 two specimens that would otherwise have been referred to ?'obiosta^ 

 characterized by a male pore invagination (on one side only) of the 

 cornigata type it seems necessary to regard worms H also as abnor- 

 mal specimens of rohusta though even more abnormal than specimens 

 G. In this case the abnormality (invagination of the male pores) 

 is such that it would ordinarily be considered not as an abnormality 

 but as good evidence for specific distinctness. 



The types of P. lohri must have been allowed to dry out at some 

 time almost completely. The specimens are very hard, brittle, 

 shrunken, wrinkled, and stuck together, the body wall transparent. 

 After soaking in water for several days, followed by a very slight 

 drying, it was possible to recognize under best optical conditions the 

 genital markings and apertures. The internal organs of the undis- 

 sected type are brittle, adherent to each other and to the membranes 

 and the body wall. Nothing could be found, however, after careful 

 examination of the internal organs to indicate that these specimens 



