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Show 148 PROF. W. N. PARKER ON THE LEFT POSTERIOR [Mar. 19, valuable suggestions to m e by letter on this subject, for he could not believe that the two so-called " vense cavee posteriores" were Fig. 2. pr.c. S.cl. *%.*R* pt. -Led I; JJL.CSM m ••'i „p.U •Cf D i a g r a m ol' the chief veins of Protopterus annectens. F r o m the ventral aspect. (N.B. - T h e veins from the body-walls a n d generative organs are omitted.) c.f, caudal vein; h.v, hepatic veins ; k, kidney ; Led, left cardinal; Ir, liver; •pr.c, precaval; pt.c1, hepatic portion of postcaval; pt.c'*-•, renal portion of postcaval ; p.v, pelvic vein ; r.p, renal portal vein ; s.cl, subclavian. really the cardinals. Although m y observations on Protopterus do not point to a paired origin of the postcaval, as indicated by |
