NO. 14 



INSECT ABDOMEN SNODGRASS 



necessary result of the general obliteration of the coelomic walls, and 

 therefore might be supposed to be an independent development in 

 each case. 



The testes of Onychophora lie dorsally in the posterior part of the 

 body ; they are tubular in form (fig. 5 C, D, Tes) but vary in length 

 in different species. Each discharges immediately into a saclike semi- 



FiG. 5. — Onychophora : internal reproductive organs. 



A, Peripatoides novae-zealandiae, female organs, dorsal view. B, same, ovarial 

 end of oviduct with spermathecal and other diverticula. C, Peripatus tholloni, 

 male organs (from Bouvier, 1905, with parts separated for clearness). D, Peri- 

 patapsis blaiftvillei, ma.le organs (from Bouvier, 1902, with accessories omitted). 

 E, same, spermatophore (irom Bouvier, 1902). 



a, b, diverticula of oviduct; AcGld, accessory genital gland; Dej, ductus 

 ejaculatorius; Epdm, epididymis; Lg, ovarial ligament; Od, oviduct; Ov, ovary; 

 Sphr, spermatophore; Spt, spermatheca; Tes, testis; Utrs, uterus; I'd, vas 

 deferens ; Vsrn, vesicula seminalis. 



nal vesicle (Vsm) with muscular walls, within which the spermatozoa 

 are matured. The slender vasa deferentia (Vd) proceeding from the 

 vesiculae are much convoluted and the upper part of each usually 

 forms an epididymislike mass of closely entangled coils (Epdm). The 

 ductus ejaculatorius (Dej) is a long, strongly musculated tube bent 

 upon itself and often looped. The spermatozoa are enclosed in sper- 

 matophores formed within the upper part of the ejaculatory duct 

 (D, Sphr). The spermatophores vary much in size and form in 



