THE SKATE. 



57 



portion (ut), opening into the cloaca, and an anterior, 

 slender, thin-walled portion, or Fallopian tube (/./) 

 which unites with its fellow of the opposite side on the 



a.p 



FIG. 19. Raja batis. The urinogenital organs of the female (one- 

 third nat. size). 



The organs are removed from the body along with a small portion of 

 the oesophagus (as), and are viewed from the ventral aspect. The left 

 ovary (ov) is removed as well as the greater part of the right oviduct ; 

 the cloaca and the right horn of the urinary bladder are laid open. 



a.p, abdominal pore: cl, cloaca: fl.t, Fallopian tube, or anterior 

 portion of oviduct : fl.f, common opening of the conjoined Fallopian 

 tubes into the abdominal cavity : /, kidney : mn.d, mesonephric duct : 

 od.g, oviducal gland : <zs, oesophagus : ov, ovary : u.b, urinary bladder : 

 M./, urinary papilla : ur, ureters : /, uterine portion of oviduct : 

 ul', its opening into the cloaca. 



