1905,] VASCULAR SYSTEM OF LACERTILIA. 479 



lohich runs along the trachea parallel with a tracheal artery 

 referred to. This vein does not exist on the opposite side. 



(2) The azygos vein is developed on the left side of the 

 body only. 



(3) There is an unusual series of vestiges of the j^osterior 

 cardinals, which, like the anterior vestige of the same, the azygos, 

 are upon the left side of the body, and, with the exception of a 

 small twig, not upon the right side. The veins foi'm the dorsal 

 parieto-hejjatics, and j^our their contents into a common trunk 

 lohich runs heloio the liver only in its anterior region, and vjhich 

 receives also branches from the first half of the stoinach. 



(4) The anterior abdominal vein receives the portal i^^st before 

 its entrance into the liver, along which it is not prolonged, and 

 just after the entrance of the portal the posterior part of the 

 epigastric vein. The anterior region of the epigastric vein is 

 either separate from the posterior part or joined by the minutest 

 twig ; it pours its blood into the liver near to its anterior end. 



(5) There are gastro-hepatic vessels to the number of four or 

 'five in the anterior region of the stomach and liver only. The blood 

 from the postei-ior region of the stomach is chiefly collected into 

 a vessel which runs back along the stomach and joins the com- 

 bined portal and anterior abdominal. 



(6) The sitpra-renal 2^ortal system consists of tioo series of 

 vessels, of which one series, consisting of one or more twigs, arises 

 from the parietes laterally ; the other series, consisting of one 

 vessel only, arises from the parietes close to the dorsal middle line. 

 Veins also emerge from the parietes and run to the sperm-duct. 



(7) The Tiidneys receive blood from the parietes in their neigh- 

 bourhood by a series of about six veins to each kidney arranged 

 metamerically, and corresponding in point of emergence from the 

 parietes with the more laterally placed supra-renal portals. 



The two halves of the anterior abdominal, before they join, 

 also give off two tivigs to the kidney on each side 



(8) A lateral abdominal vein is present, which runs along the 

 kidney on the outer side, but dies away before reaching its 

 anterior end, 



(4) On the Anatomy of Amphisbfena brasiliana, particularly of the 

 Vascular System and the Mesenteries. 



Though a good deal of information concerning the anatomy of 

 this genus of Lacertilia is already contained in zoological litera- 

 ture *, there remain certain matters which have not been ex- 

 haustively stvidied, either in the species [Aonphisbcena brasiliana) 

 with which I deal in the communication now submitted to the 

 Society or in other species. I have therefore, in continuation of 

 a series of dissections of the Lacertilia, some of the results of which 



* The pi'iiicipal anatomical memoirs dealing with the viscera are hy v. Bedriaga 

 (Arch. f. Natnrg. 1884), Smalian (Zeitscliv. wiss. Zool. 1885), and Butler (P. Z, S. 

 1895). In none of these is A. brasiliana dealt with. 



