SCYLLIUM 



57 



the funnel-shaped openings of the Mullerian ducts on the 

 ventral side of the oesophagus, and pass down them. These 



Fig. 30. — Scyllium : ventral view of a dissection of the urinogenital 

 system of a female adult. 



ab, abdominal pore through which an arrow is passed ; t, oesophagus ; 

 io, internal opening of the Mullerian ducts ; k, mesonephros ; Md, Mullerian 

 duct ; o, ovary ; og, oviducal gland ; 00, opening of Mullerian duct into the 

 cloaca ; p, pericardium ; pp, pericardio-peritoneal canal through which an 

 arrow is passed ; r, rectum ; so, sinus venosus cut ; up, urinary papilla ; 

 Wd, Wolffian duct. 



ducts or oviducts swell out into the oviducal glands, where the 

 horny egg-case is secreted, and open separately into the cloaca. 



