THE SKATE. 



57 



portion (/), 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 



f* 



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 (<zs), 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: .fi.t, Fallopian tube, or anterior 

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

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

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

 u.p, urinary papilla : ttr, ureters : ut, uterine portion of oviduct : 

 ut', its opening into the cloaca. 



