308 LILIAN SHELDON. 



spermatophore has, in fact, precisely the same structure as that 

 described by GafFron in P. Edwardsii. 



The structure of the walls of the vas deferens of P. novae 

 zealandiae is also similar to that of P. Edwardsii, except 

 that the secretion globules are arranged in irregular masses in 

 the cells near their ends, which abut upon the lumen, instead 

 of having the regular arrangement described as occurring in 

 the latter. The structure of the walls of the testes in P. 

 novae zealandiae differs from that of P. Edwardsii, in that in the 

 latter Gaffron (2) states that there is no epithelial lining, where- 

 as those of the former are lined by a layer of fairly deep 

 columnar cells with large nuclei, their ends, which abut upon 

 the lumen, being rounded. There is a layer of muscles external 

 to the epithelium. 



In P. capensis the spermatophores are small rounded 

 bodies, enclosed in a thin, structureless case, and filled with 

 spermatozoa. 



In its lower part, where the vas deferens is filled with 

 spermatophores, the cells lining it are somewhat flat, are much 

 vacuolated, and stain very slightly. Just in front of the 

 region where the fully formed spermatophores lie the cells are 

 continued into small masses of unstained matter containing 

 very deeply staining globules lying in the lumen of the duct. 

 These masses probably form the cases of the spermatophores, 

 and are secreted by the cells with which they are continuous. 

 In front of this region the cells become columnar, the nuclei 

 being closely packed at the bases of the cells. The cell pro- 

 toplasm also stains very deeply. The spermatophores of P, 

 capensis, after they have been shed, are easily seen by 

 examining with a lens the dorsal surface of a female. They 

 appear as small, round, whitish bodies, lying on the skin of 

 the animal, and when teased are found to be filled with 

 spermatozoa. 



I have not had the good fortune to see a spermatophore of 

 P. novae zealandiae after it has been shed, and I only assume 

 that the horny case found in the vas deferens is a spermatophore, 

 because Professor Moseley (4) and Gaffron (2) both describe it 



