No. 462.] LATERAL VEIN OF SKATE. 351 
** These latter, I have no doubt," says Parker, “although I have 
not actually proved it, anastomose with factors of the portal 
vein" (p. 416). The large trunk which constitutes a direct 
continuation of the lateral vein from its femoral region into the 
cardinal sinus was called by Parker the 2/o-hemorrhoidal vein 
because it “seems to correspond in all essential respects to the 
iliac vein " and “also receives the hemorrhoidal veins from the 
rectum and cloaca” (p. 416). The arrangement described by 
Parker is virtually that of a continuous large venous trunk open- 

Fic. 1.—Venous system of Raia nasuta. After T. J. Parker. sn. cf., cardinal sinus; 
sn. p., hepatic sinus; sz. frecav., precaval sinus; sw. vm., Veno 
us sinus; vx. ór., brach- 
ial v vn. fe., femoral vein; vn. kær., hzmorrhoidal veins; v». il-her., ilio-haem- 
eins; : 
orrhoidal veins; va. jug. if., inferior jugular vein; vw. Z., lateral vein ; v. f'cr., post 
cardinal vein ; vz. frecr., precardinal vein. 
ing at its anterior end into the precaval sinus and at its posterior 
‚end into a posterior extension of the cardinal sinus, its chief 
tributaries being the brachial and femoral veins and veins from 
the abdominal wall. 
Jourdain ('59) in his 
oes not mention the lateral veins, but 
«Recherches sur la Veine Porte Rénale," 
describes the femoral 
