OCR Text |
Show 1 9 0 6 .] RESPIRATORY SYSTEMS IN THE OPHIDIA. 511 afferent renal before it reaches the kidney with its affluents after it has left the kidney in front. I have not referred to*any similar vein in Boa, and I have not found one. The existence or nonexistence of this vein does not, however, seem to be of any systematic importance. I find, in fact, that it may either exist Text-fig. 90. Posterior cardinal and suprarenal veins of Boa diviniloqua. K . Left kidney; pc. Post-cardinal vein (continuation forward of renal afferent vein); S.B. Left suprarenal body; sr. Suprarenal portal veins; r.eff. Efferent renal vein of left side; T. Testes. or not in the Pythonine division of the Boidse. In both Python molurus and P. sebce I have found this vein to be very extensively developed both in the region of the kidney and behind it, and furthermore on both sides of the body. It seemed to me to be P roc. Z ool. S oc.-1906, No. XXXY. 35 |