1906.] 



RESPIEATORY 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 non- 

 existence of this vein does not, however, seem to be of any 

 systematic importance. I find, in fact, that it may either exist 



Text-fio-. 90. 



\i IT 



pc- 



■S.B. 



P 



c. 



r.eff.-- 



•K 



Posterior cardinal and suprarenal veins of 5o« diviniloqua. 



K. Left kidney ; pc. Post-cardinal vein (continuation forward of renal afferent 

 vein); S.B. Left suprarenal bod}'; sr. Suprarenal portal veins; r.eff. 

 Efferent renal vein of left side ; T. Testes. 



or not in the Pythonine division of the Boidee. In both Pyilion 

 molurus and P. sehce 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 

 Proc. Zool. Soc— 1906, No. XXXY. 35 



