12 Journal of the Asiatic Society of Bengal. [N.S., XIX, 
similar to that of Uromastix, so that it ioe suffice to enu- 
merate the chief points of difference. The 
(1) The origin of the subclavians as a iidapenicet art- 
eries from the right systemic arch, and not, as in Varanus and 
Uromastiz, as a single vessel. 
(2) The anterior and posterior mesenteric arteries arise 
close together, the posterior in ton of the anterior, between 
the ninth and tenth pairs of dorso-lumbars. e have seen 
that in Uromastix the posterior mesenteric artery arises from 
the aorta further os between the seventh and eighth 
pairs of dorso-lum 
) The mgmt of an independent rectal artery, in 
addition to the usual branch of the posterior mesenteric. 
REFERENCES TO LITERATURE. 
1. Beddard, F. E. Contributions to the Anatomy of the 
Lacertilia.—On some points in the Vascular 
System of oer ae and other Lizards. 
Proc. Zool. Soe , 1904, v 
2. - Notes upon the Pes hay of certain 
Snakes of the family Boide. Proc, Zool. Soc., 
1904, vol. II 
3. “A Some contributions to the knowledge of 
the Anatomy, principally of the Vascular Sys- 
tem, of Hatteria, Crocodiles, and certain 
Lizards. Proc. Zool. Soc , 1905, vol. II 
4, oe On the Vascular System of Heloderma, 
with notes on that of the Monitors and Croco- 
diles. Proc. Zool. Soc., 1906, vol. II. 
5. © The Vascular System of Hatteria. Proc. 
Zool. Soc., 1905, vol. II. 
6. Gegenbaur, C. Vergleichende Anatomie der Wirbeltiere 
eipzig, 1898-1901. 
7. Hochstetter, F. Uber die Arterien des Darmcanals der 
aurier. Morph. Jahrb. Bd., XXVI, 1898. 
8. Mackay, J. Y. The Arterial System of the Chamaeleon. 
Mem. and Memoranda in Anatomy, vol. I. 
Edinburgh, 1889 
o.. 0 iene C.H. The Circulatory System er the Com- 
on Grass Snake. Proc. Zool. Soc , 1912. 
- A Note on the Ductus Caroticus ae Ductus 
Arteriosus and their ger gas in the Reptilia. 
Journ. Anat., vol. LI, 1917. 
ij, ‘ The Blood gee System of the Tua- 
a Sphenodon punctatus. Phil. Trans. toy: 
, 1920. 
12. Rathke, H. oSteecachans iiber die Aortawurzeln und 
A ie von ihnen ausgehenden Arterien der Saurier. 
i ia ar 



