1904.] 



ANATOMY OP CERTAIN SjNAKES. 



115 



(text-fig. 21, p. 114) are disposed as follows: — The caudal vein 

 gives off first the right afierent renal; after the cloaca (i. e. in front 

 of that aperture) it gives ofi" two branches to the dorsal parietes 

 and then divides into three veins as in the Anaconda. Shortly 

 after its origin, the anterior abdominal gives rise to the single 

 epigastric vein. The arrangement of veins in this snake is in 



Text-fig. 22. 



^n/.a^/ 



Certain abdominal veins in Eryxjaculus. 

 B, branches to rectum ; el., branches to cloaca. Other letters as in text-fig. 21. 



fact precisely as in Etc7iectes. In £Jri/x jaculus, on the other 

 hand, there are differences which are illustrated in the accom- 

 panying figure (text-fig. 22). The caudal vein apparently divides 

 into two— but I am a little uncertain — and each of these vessels 



