1870.] PROF. W. H. FLOWER ON ZLURUS FULGENS. 757 
Fig. 3. 

Inner surface of left cerebral hemisphere; natural size. 
CMS. Calloso-marginal suleus. C. Crucial suleus. s, Superior external 
gyrus. h. Hippocampal gyrus. 
On the inner side of the hemisphere, the crucial sulcus (C) is 
strongly marked, running obliquely backwards. The horizontal 
portion of the calloso-marginal sulcus (C’ M8) is short, not extending 
further forward than over the middle of the corpus callosum ; so that, 
anteriorly to this spot, the internal or hippocampal gyrus (/) is not 
distinguishable from the superior (s). Posteriorly the sulcus bends 
downwards and forwards at a sharp angle, separating the hippo- 
campal gyrus in front from a broad descending portion of the su- 
perior gyrus (s) behind. ‘The latter is divided by a strongly 
marked suleus, lying parallel with the descending portion of the 
calloso-marginal sulcus, into two parallel portions of nearly equal 
breadth. 
The corpus callosum is *9" in length. 
The cerebellum is 1°3! broad, and projects by nearly half its 
antero-posterior length behind the posterior margin of the cerebral 
hemispheres. It appeared to present no notable difference in form 
from that of other allied species. 
Mourn, Toneur, AND LARYNX. 
The mucous membrane lining the buccal cavity is smooth, and of a 
pale pink colour, but black at the edges, especially upon the inside 
of the upper lip. The gums surrounding the incisors, especially the 
upper series, are mottled with black. 
The palate is of very peculiar form ; it is concave immediately be- 
hind the incisor teeth, then becomes convex between the posterior 
premolars, and is hollowed again between the. true molars. The 
ridges are not very prominent or regular; those placed most ante- 
riorly form a wide curve with the concavity backwards, extending 
completely across the palate, though slightly broken in the middle 
line ; they gradually slope more and more backwards at their outer 
ends. Behind the seventh there are two or three not quite symme- 
