268 MR. F. E, BEDDARD ON THE [June 6, 
manchen Gattungen, z. B., bei Varanus, Iguana, ist es nach den 
Angaben von Stannius zwar diinn, aber schildformig, vorne 
concav, hinten convex und zeigt Andeutungen einer Sonderung 
in eine mittlere und zwei seitliche Erhabenheiten, durch sehr 
schwache Vorragungen, zwischen denen Spuren von Furchen 
legen.” 
It seems plain from the above account that the cerebellum of 
Varanus is considered to be like that of Zgwana, and, presumably, 
of other Lacertilia. 
In one of the most recent works dealing with the brain of the 
Sauropsida, the Catalogue of the Museum of the College of 
Surgeons *, there is a description of the brain of Varanus and 
some incidental references to the brain in the Lacertilia. Of the 
brain of Varanus it is remarked that ‘the cerebellum is of 
moderate dimensions and has the plate-like form usual among 
Reptiles.” Elsewhere (p. 110) it is said that “the reptilian brain 
is narrow... , and, except in swimming forms, with insignificant 
cerebellum.” I have examined this specimen myself and agree 
with the description. None of these statements, as I think, does 
justice to the cerebellum of Varanus exanthematicus, which is not 
at all like that of Zguana, has not a plate-like form, and is not 
insignificant—comparatively speaking, at any rate. 
The accompanying figure shows the characteristics of the 
Text-fig. 39. Text-fig. 40. 
Chis 
eae 
Text-fig. 39.—Lateral view of brain of Varanus exanthematicus (upper figure) 
and of Tupinombis nigropunctatus (lower figure). 
Text-fig. 40.—Dorsal view of brain of Varanus exanthematicus. 
ce. Cerebrum ; ce. Cerebellum ; op. Optic lobes. 
cerebellum of the Teguexin Lizard (text-fig. 39), which appears 
to me to be quite typical of the Lacertilia and to bear out the 
above quoted statements. It isa plate-like disc convex posteriorly, 
which as it were lies up against the optic lobes and is propped up 
* Descriptive and Illustrated Catalogue of the Physiological Series contained in 
the Museum of the Royal College of Sur zeons of England, vol. ii. p. 113 (2nd ed.). 
