ON LIMNODKILUS GOTOI, N. SF. 



11 



alimentary canal. These two veutral vessels uuite into a single large ventral vessel, 

 which then runs backward. The lateral commissures connecting the dorsal and 

 ventral vessels in segments I — VII are slightly enlarged and contractile. The supra- 

 intestinal vessel is conspicuous only in segments Vili, IX and their vicinity, but very 

 indistinct elsewere. 



Fig. 1. — Diagram showing the arrangement of the reproductive organs. 

 Eig. 2a. — Cross seclijii through segment VIII; (o show the commissural blood vessels. 

 Fig. 2 b. — Cross section through segment IX ; to show the commissural blood-vessels. 

 Fig. 3. — Male duct, with peni'. 



Fig. 4. — CrosB section of prostate gland, to show the connection with the atrium. 

 Fig. 5. — Cross section through tie penis showing the spirally arranged muscle. 

 Fig 6. — Nephridium. 

 Fig. 7. — Brain. 



Fig. 8 — Semi-diagrammatic section of penis. 



Fig. 9. — Spermatheca. 



Fig. 10. — Chitinous sheath of penis. 



EXPLANATION OF PLATE II. 



ABBREVIATIONS. 



n. c. 

 neph. c. 



c. h.K. 

 dit. 



d. v. 

 epth. 

 h. 



amp. 

 at. 



al. c. 



alimentar}' Canal. 



ampulla. 



atrium. 



chitinous sheath, 

 clitellum. 

 dorsal vessel, 

 epithelium, 

 heart, 

 nerve-cord, 

 nephridial canal. 



ueph. p, 



ovd. 



!>• 



prs. 



s.i.v. 



ep. c. 

 sp. m. 

 sptb. 

 t. 



nephridio-pore. 



oviduct. 



penis. 



prostate gland, 

 supra-intestinal vessel, 

 spermduct cavity, 

 spiral muscle, 

 spermatheca. 

 testis. 



