480 Records of the Indian Museum. [Vol. VIII, 



Crural glands. 



A single crural gland is found in the male at the Vjase of each 

 of the two pregenital pairs of appendages. Each gland is tubular 

 in form, often much convoluted, and placed in close juxtaposition 

 with the renal organs of the same segment. The glands at the 

 base of the seventeenth legs are much longer than those of the 

 preceding segment; as will be seen from pi. xxxv, figs 8-10, they 

 may show considerable differences in length. Their external open- 

 ings are situated a little behind those of the renal organs. 



Male Reproductive Organs (pi. xxxvi). 



The testes have the form of slender tubes which arise from 

 the dorsal aspect of the seminal vesicles and extend forwards as 

 far as the interspace between the ninth and tenth pairs of legs. 

 They run together throughout the greater part of their length and, 

 in the specimen figured (pi. xxxvi, fig. i), the distal ends turn 

 downwards towards the ventral surface, the actual apices being 

 directed backwards. 



The seminal vesicles are large sacs, sometimes 4 mm, in 

 length; they are placed one behind the other, overlapping slight!}^ 

 at their point of contact, and occupy almost the whole of the body 

 cavity between the tenth and thirteenth pairs of legs. 



The vasa deferentia arise from the inferior surface of each 

 seminal vesicle and extend backwards as a closely convoluted 

 mass of tubes as far as the seventeenth pair of leg?. At this 

 point, in the specimen figured, the left vas deferens, that sup- 

 plied by the anterior vesicle, passes beneath both nerve- cords 

 before running forwards to join its fellow; in a second specimen 

 one vas deferens passes under the right nerve-cord only. The two 

 vasa deferentia, running forwards, lie close together and become 

 enveloped in a common sheath \ their lumina not joining until 

 they reach the level of the eighth or ninth legs. 



The common duct is of very great length, as long as the 

 entire animal; it passes forwards from the junction of the two 

 vasa deferentia and in one specimen reaches the fifth, in another 

 the interspace between the seventh and eighth legs before turning 

 backwards. The common duct has a single loop in its downward 

 course and runs throughout the posterior part of its length on the 

 left side of the animal. At its termination, however between the 

 eighteenth or penultimate pair of legs, it passes, in both specimens 

 examined, to the right of the two nerve-cords 



The testes are in an active state of spermatogenesis. The 

 lumen, which is not sharply defined, contains quantities of sperm- 

 mother-cells, mostly in the spireme phase. Only quite close to 

 the seminal vesicle is any trace of the subsequent development 

 found, the formation of the spermatozoa taking place for the most 

 part within the vesicle. I have been unable to detect a muscular 

 layer in the wall of the testis near its junction with the seminal 



I They are separated in the tig-ure. 



