RHINODRILUS TENKATEI. 105 



examining a dissected animal I could not find them out, 

 but by microscopical examination of transverse sections 

 they are plainly visible. I believe they are situated in the 

 14th segment ; however because the septa are strongly dis- 

 placed by the development of the seminal reservoirs , it is 

 difficult to determine their real situation. Each ovary is 

 a lobed organ, fixed to the posterior surface of the ante- 

 rior septum , on each side of the ventral vessel ; they con- 

 tain every gradation in development of the ova. Opposite 

 each ovary, on the anterior side of the posterior septum, 

 lies the funnel-shaped mouth of an ovid uct , which , passing 

 through the septum , opens on to the exterior in the line 

 of the ventral setae. I could not identify any structure 

 as a receptaculum ovorum. 



The alimentary canal commences by a wide buccal ca- 

 vity, passing into a large pharynx, which extends into 

 the 5tli segment and is attached to the body-wall by nu- 

 merous radiating muscular bands. The wall of the pha- 

 rynx is not only muscular, but contains in its posterior 

 two-thirds a large glandular mass , very obvious in trans- 

 verse sections, as described also in Pontodrilus^) by Per- 

 rier. The oesophagus then follows , reaching into the lO^t 

 ring ; its posterior boundary is marked by a large , mus- 

 cular gizzard with the same nacreous appearance as in 

 Lumbricus and extending over three segments. Behind the 

 gizzard the tubular intestine commences and is furnished 

 here on each side with six coecal diverticula, the first of 

 which is divided in a superior and an inferior portion; in 

 transverse sections these glands appear to be dilatations of 

 the intestine , having their lumen divided by radiating 

 folds of their wall in a great number of lamelliform cavi- 

 ties, resembling the structure of the oesophagean glands 

 in Lumbricus. A rudimentary typhlosole seems to be present. 



The vascular system consists of four main vessels: the 

 dorsal trunk, two ventral vessels and a subneural vessel; 



1) Arch. Zool. Expérim. T. IX, 1881, p. 197, pi. XVIII, fig. 40. 

 Notes from the Leyden Miuseuzn, Vol. IX. 



