430 PHYSIOLOGY OF THE INVERTEBRATA. 



side of the rectum. Like the testes, the ovary is situated in 

 the posterior end of the body. It is a small, single, bilobed 

 organ provided with two long oviducts, which unite before 

 passing into a short vagina. The vagina opens externally on 

 the ventral side of the rectum. The oviducts are provided 

 with uterine dilatations, and in these the ova are developed, 

 Pcripcdus being a viviparous animal. For details concerning 

 the development of Pcripatus, the reader is referred to 

 Moseley's original paper, already cited. 



The Myriapoda. 



The Myrictpoda are dioecious. The testes, in the Chilopoda, 

 assume various forms ; but in most of these animals, the testes 

 are said to be "fusiform acini united by delicate ducts with a 

 median vas deferens ; and two, or four, pairs of accessory 

 glands are connected with the opening of the male apparatus." 

 According to Favre,* the testis, in Zithohius, is a single tube 

 connected with the vas deferentia, the latter being situated 

 on each side of the rectum. A vesicula seminalis opens into 

 each vas deferens. 



In the Cliilognatha (Biplopuda), the tubular testes are 

 situated between the alimentary canal and the nervous 

 system. The testes are provided with lateral tubules, the 

 former being connected with the latter by transverse ducts. 

 There are two penes connected with the bases of the seventh 

 pair of legs. In Scolopendra (centipede), Gcophilus, and 

 Cryptops, the spermatozoa are enclosed in spermatophores. 



In both the Cldlo'poda and Chiloynatha, the ovary is a long 

 single tube. It is situated above the alimentary canal in the 

 Chilopoda, and between the alimentary canal and the nervous 

 system in the Chiloynaflut. The female organ in each order 

 is provided with double vagime, which open beneath the anus 

 in the Cliilopoda, and behind the bases of the second pair of 

 legs in the Cliilognatlia. Two spermatheca3 are generally 

 present in the Myriapoda. 



* Anaalesjles Seances Xaturelles, 1855. 



