AMPHIBIA. 



199 



(1) Renal Portal The principal veins of the hind-limb are 

 the femoral and sciatic, running 



along the front and back of the 

 thigh. The femoral vein is 

 connected by a cross-branch (*) 

 with the sciatic just before 

 reaching the trunk, and then 

 divides into a pelvic vein which 

 runs to the middle ventral line 

 to unite with its fellow, and a 

 renal portal vein which runs to 

 the outer side of the kidney, 

 and divides into small veins 

 breaking up in the kidney- 

 substance. The renal portal 

 vein receives the sciatic vein, 

 dorso - lumbar veins from the 

 dorsal abdominal walls, and, in 

 the female, small veins from 

 the oviduct. 



(2) Hepatic Portal The liver 

 is supplied with impure blood 

 by two veins, (a) the anterior 

 abdominal and (6) the portal. 

 (a) The anterior abdominal is 

 formed by the union of the two 

 pelvic veins, receives veins from 

 the bladder, and runs forwards 

 in the middle line of the ab- 

 dominal wall as far as the liver. F % 55.-VEINS or FROG (after 



. , . Ecker), semi-dias;rammatic. 8.V. 



Here it bifurcates, the two divi- Sinus venosus ; & A , right auricle ; 

 sions going to the right and left L.A, left auricle ; V, ventricle ; 



halves of the liver. (b) The P r ~ c \ P rec . aval ; , ex.ju t external 

 . , , Y jugular veins ; i.ju t internal jugu- 



vein IS formed by the l ar vein ; s-sc, sub-scapular vein ; 



in, innominate vein ; s-cl, sub- 



clavian vein; br, "brachial vein; m-ct, musculo-cutaneous vein; p-c, post- 

 caval ; sc, sciatic vein ; /, femoral vein ; *, cross-branch connecting sciatic 

 and femoral ; p.v, pelvic veins ; r.p, renal portal vein ; d-l, dorso-lumbar 

 veins; o, veins from oviduct; r.v, renal veins ; a.ab, anterior abdominal 

 vein ; bl, veins from bladder ; + , small vein from truncus arteriosus ; p, 

 portal vein ; h, hepatic veins ; k, kidneys ; i, represents alimentary canal 

 with its capillaries ; I, represents capillaries of liver ; pi, pulmonary veins. 



