320 Records of the Indian Museum. [Vol. VIlI, 



The genital atrium is divided unequally into two divisions, 

 the atrium genitale commune and atrium masculinum by a projec- 

 ting ridge ; into the former, which is posterior, open the medium 

 unpaired oviduct, the ''uterine duct" and the muscular mucous 

 glands; while the latter and anterior division receives the opening 

 of the penis chamber. 



The ovaries are situated in the usual position between the 

 first and second anterior secondary branches of the gut. and close 

 to the middle line ; the oviduct, on each side, starts from the 

 actual substance of the o^vary as a funnel-like opening, richly 

 ciHated and surrounded by glands, passing gradually into a fine 

 duct which runs ventrally ; at the region of the penis, it suddenly 

 takes a vertical course to the dorsal side, where it meets its fellow 

 of the opposite side to form a medium unpaired oviduct ; this 

 latter, still a narrow duct, continues until it enters the genital 

 atrium anteriorly from the dorsal side. 



Fig. 2. — Diagram of the muscular mucous gland of P. kempt (purely diagram- 

 matic) opening into the posterior part of the genital atrium. The two parts do 

 not lie in quite the same plane. 



The " uterus " — better called shell-gland — with its wide duct 

 shows no peculiarities. The muscular mucous glands (muskulose 

 Driisenorgane of German writers) are two in number, and each 

 possesses a lumen ; a peculiarity of these structures however is that 

 there is but a single exit for the secretion of both glands. As shown 

 in text fig. 2 thej^ are both pear-shaped structures, one of which 

 is entirely embedded in the parenchyma, while the other protrudes 

 by its tapering extremity in the form of a papilla into the common 

 genital atrium, further^ the rounded end of each gland forms with 

 the other a common mass through which the two lumina become 

 continuous. Thus there is but one aperture for the two glands. 

 The exact angle of inclination of one gland to the other it was not 

 possible to determine, lince only a single specimen ^yvas available. 



Numerous testes are present dorsally and ventrally, and extend 

 nearly the whole length of the body. The vasa deferentia expand 

 into vesiculae seminales before entering the cavity of the penis or 

 ductus ejaculatorius. There is no appreciable differentiation of 

 the penis into bulbus, etc. 



