PERIPATUS CAPENSIS AND NOVAE-ZEALANDIAE. 307 



side, and dorsally to the ductus ejaculatorius, into which they 

 open at the point where it opens to the exterior. These 

 accessory glands were first mentioned by Professor Moseley (4), 

 and their position and mode of opening were described by 

 Professor Balfour (1). 



In P. novae zealandiae these accessory glandular tubes are 

 also present, but their relations are somewhat different. They 

 lie more laterally in the body. Each gland starts as a blindly- 

 ending tube near the posterior end of the body, and passes 

 forwards for a short distance. It then bends sharply on 

 itself, and passes backwards to its external opening, which 

 is situated near the posterior end of the body at its ventro- 

 lateral angle, external to the nerve-cord. This position of 

 their openings is clearly seen, both on dissection and in sec- 

 tions. Thus they open quite independently of the vas deferens, 

 therein differing from those of P. capensis. They also differ 

 from the accessory glands of P. Edwardsii, which Gaffron (2) 

 describes as opening with the anus. 



Vas Deferens. 



To the naked eye the main difference between the vas 

 deferens of P. capensis and that of P. novae zealandiae appears 

 to be in their relative lengths, that of the former being much 

 the shorter. This difference seems to be due to the very great 

 difference between the spermatophores formed by the two 

 species. 



The vas deferens of P. novae zealandiae very closely re- 

 sembles that described by Gaffron in P. Edwardsii. The whole 

 of the posterior part of the duct is filled by an enormously 

 long spermatophore, which is surrounded by a horny case. 

 The internal cavity is enlarged in several places and in these 

 regions is filled with spermatozoa, the external case being thin 

 and composed of a single layer. In the remainder of the 

 spermatophore the lumen is very small, and the case very thick 

 and composed of several layers of horny substance. The whole 



