v u 



sxtwL y'y 2 yV k 



y- 



f 3 



Fig. 3. Ceratias holbblli Kroyer. Viscera of the Antarctic specimen, x^. a\ bulbus arteriosus; a 2 , ventricle; a 3 , auricle; 

 a 1 , sinus venosus ; b, pericardium ; c, pericardio-peritoneal septum ; d, hepatic vein ; e 1 and e 2 , right and left lobes of the 

 liver;/ 1 ,/ 2 and/ 3 , cardiac, pyloric and caecal parts of the stomach;/ 4 , stomach opened to show longitudinal folding of the 

 gastric mucosa ; g, pyloric caeca ; h, duodenum ; i, small intestine ;j, large intestine ; k, rectum ; /, anus ; m, spleen ; n, pancreas 

 in the intestinal mesentery; o 1 , hepatic duct; o 2 , cystic duct; o 3 , gall bladder; o 4 , bile duct; p, left kidney; q, left ureter; 

 r, renal duct ; s, urinary bladder ; t, urinary aperture ; u, right ovary ; v, integument of right ovary ; w, left genital aperture ; 

 x, urinogenital cloaca; y 1 , posterior mesenteric vein; v 2 , ovarian vien; v 3 , gastro-intestinal vein; y*, intestinal vein; 

 y r °, gastric vein ; z, hepatic portal vein. 



