1909. ] OF THE CARNIVORE GALIDIA ELEGANS. 485 
slightly asymmetrical, the asymmetry is precisely the reverse. In 
this region the brain of Galidia shows an interesting feature not 
shown in the brain of its ally Galidictis. On the left side of the 
brain, and on the left only, as is shown in the text-figure, there is 
what certainly appears to be a precrucial sulcus, such as is figured 
by Dr. Elliot Smith in Viverra*, and is well known to be very 
characteristic of the Arctoid division of the Carnivora +. 
The lateral sulcus seems to be in all probability a conjoined 
lateral and coronary sulcus, as I have given reasons for believing 
to be the case with the lateral sulcus of Galidictis. There is no 
great difference between these fissures in the two Carnivores now 
under consideration. Posteriorly in Galidia the sulcus bends 
inwards and then outwards, ending therefore in a semicircular 
outline. It may well be that this is an indication of a vestige of 
an ento-lateral sulcus such as is figured by Elliot Smith in Her- 
pestes pulverulentus %. 
There is, moreover, just a faint indication of an anterior pro- 
longation to the inside of the lateral sulcus from the angle which 
the latter makes when it bends outwards. I could find no definite 
ansate sulcus in the brain of Galidia. 
The suprasylvian sulcus ends posteriorly at the level of the 
inward bending of the lateral fissure. Anteriorly also it does not 
extend so far as does the lateral fissure, in both these points dif- 
fering from Galidictis and from Herpestes as figured by Elliot 
Smith. 
The sylvian complex of fissures differed slightly on the two sides 
of the body. The right side is represented in the annexed figure 
(text-fig. 128). The fissure which I have lettered “ /” seems to me 
to correspond with the postsylvian fissure of Herpestes, in which 
case perhaps “S’” is not really the sylvian fissure proper, but an 
anterior ectosylvian, while “g” is a posterior ectosylvian. On 
the other hand, on the left side of the brain, while S retains the 
same position and relations, the two fissures “f” and “g” form 
only one fissure, the lower part of ‘“f” being absent, and the 
upper part joining, or very nearly joining, ‘‘g.” The arrangement 
here is, in fact, very like that of the left side of the brain of 
Galidictis figured by myself. There is in favour of the former 
interpretation of the furrows in question the fact that the furrow 
which I have lettered “ S'” does not reach the rhinal furrow at 
quite the right point of a true sylvian fissure. This, I think, will 
be apparent after an inspection of my drawing. It seems, on the 
whole, to be the most reasonable course to regard the true sylvian 
fissure as not present, but to consider the fissure which I have 
lettered S to correspond to the similarly-lettered furrow in 
Dr. Elliot Smith’s figure of the Hyzna’s brain §, which he refers 
to in the text as “the so-called ‘Sylvian fissure,’” and which is 
followed by two fissures in the temporal region, as in Galidia. 
* Cat. Mus. Roy. Coll. Surgeons, vol. i. ed. 2, 1902, p. 249, fig. 122. 
+ Mivart, Journ. Linn. Soc., Zool. vol. xix. 1886. 
{ Loe. cit. p. 254, fig. 625. § Loe. cit. p. 257, fig. 130. 
