1905. ] ON THE ANATOMY OF THE FERRET-BADGER. 21 
Some Notes upon the Anatomy of the Ferret-Badger, 
Flelictis personata. By Frank E. BeEpparp, M.A., 
F.R.S., Prosector to the Society. 
| Received March 21, 1905. ] 
(Text-figures 7-12.) 
The dissection of a female example of //elictis personata, which 
was acquired by the Society on the 4th and died on the 14th 
November, 1904, enables me to lay before the Society some new 
facts in the anatomy of this genus of Carnivora. 
So far as Iam aware, the only zoologist who has investigated the 
anatomy of the soft parts of the genus Helictis is the late Prof. 
Garrod *, whose memoir deals with the essentials in its structure. 
The species examined by him was Helictis subaurantiaca. It is 
not therefore unnecessary to report upon the anatomy of another 
species, though the differences between the two are, as might be 
expected, but slight. I deal, moreover, with a few points upon 
which Prof. Garrod did not touch in his account. 
S Brain. 
The brain of Helictis swbawrantiaca has been described and 
figured (in dorsal and lateral view) by Prof. Garrod in his memoir 
already referred toy. The figure of the brain of Helictis personata 
submitted herewith (text-fig. 7, p. 22) shows certain differences, 
which I regard as worthy of record in view of the little knowledge 
which we possess upon the matter. 
The most salient difference which this brain shows from that of 
H. subaurantiaca is the very slight appearance upon the dorsal 
surface of the intercalary prolongation of the calcarine sulcus. 
This furrow, as will be seen in the figure (text-fig. 7), only 
appears dorsally for a short distance quite at the posterior end of 
the hemispheres, and also of course anteriorly where the two sulci 
join the crucial sulci. 
The precrucial sulcus in my specimen is not so fully developed, 
particularly upon the left side (text-fig. 7, Pc.S.), as in Garrod’s 
specimen of Helictis subaurantiaca. It does not entirely delimit 
the ursine lozenge in front. 
The Sylvian fissure on both sides of the brain joins the supra- 
sylvian, the gyrus anterior tothe Sylvian beingapparently depressed 
below the surface of the hemispheres. There is a hint of this in 
Garrod’s figure, but hardly in that of Dr. Eliot Smith, though it 
refers, I imagine, to the same brain. The remaining fissures agree 
absolutely with those of Helictis subaurantiaca. 1 pass on therefore 
* “Notes on the Anatomy of Helictis subawrantiaca,” P.Z.S. 1879, p. 305. 
+ This brain is also figured in the Catalogue Physiol. Series Roy. Coll. Surgeons, 
vol. ii. (2nd ed.) p. 273, by Dr. Elliot Smith. 
