248 PROFESSOR F. M. BALFOUR. 



prostates {pr') and vasa deferentia [vd) and accessory glandu- 

 lar tubules (/"). 



All the above parts lie in the central compartment of the 

 body cavity. In addition, the accessory glandular bodies or 

 crural glands of the last (I7th) pair of legs are enlarged and 

 prolonged into an elongated tube placed in the lateral com- 

 partment of the body cavity [a g). 



The arrangement of these parts represented in the figure 

 appears essentially that which Moseley has already described 

 for this species. The dilatations on the vasa deferentia, 

 which he calls vesiculse seminales, is not so marked; nor can 

 the peculiar spiral twisting of this part of tho vas deferens 

 which he figures (No. 13) be made out in this specimen. 

 The testes are placed at different levels in the median com- 

 partment of the body cavity, and both lie on the same side of 

 the intestine (right side). 



The arrangement of the terminal portions of the vas de- 

 ferens is precisely that described by Moseley. The right vas 

 deferens passes under both nerve-cords to join the left, and 

 form the enlarged tube {p), which, passing beneath the 

 nerve- cord of its side, runs to the external orifice. 

 The enlarged terminal portion possesses thick muscular 

 walls, and possibly constitutes a spermatophore maker, as 

 has been shown to be the case in P. N. Zealandise, by 

 Moseley. 



In some specimens a diflferent arrangement obtains, in that 

 the left vas deferens passes under both nerve-cords to join the 

 right. 



In addition to the above structures, which are all described 

 by Moseley, there are a pair of small glandular tubes (y), which 

 open with the unpaired terminal portion of the vas deferens at 

 the generative orifice. 



2. Female Organs. PI XIX, fig. 33. 



The female organs consist of a median unpaired ovary and 

 a pair of oviducts, which are dilated for a great part of their 

 course to perform a uterine function, and which open behind 



