Fig. 75.— Venous system of tlie frog seen from the dorsal side, abd, ab- 

 dominal vein ; bi\ brachial vein ; cd, cardiac, or vena bulbi cordis ; ds. 

 /;;?<^, dorso-lumbar ; «?«, duodenal ; ^jf/.yw, external jugular ; fm, femoral; 

 gs, gastric ; hp, hepatic ; hp.pt, hepatic portal ; int. intestinal ; int.ju, 

 internal jugular; kd, kidney; l.au, left auricle; btg, lung; Ivr, liver; 

 msxu, musculo-cutaneous ; pr.cv, precaval ; pt.cv, postcaval ; pul, pul- 

 monary; /z/, pe'.vic; r.a//, right auricle; ;«, renal veins; rn.pt, renal 

 portal; sc, sciatic; spl, splenic; spm, spermatic; s.v, sinus venosus; 

 ts, testis; vcs, vesical veins. (From Parker and Haswell's Zoology.) 

 T 273 



