_ 
(Explanation of tfte $latt of Sllusftratfonsf 
TO THE FOURTH NUMBER OF 
ZOOLOGICAL RESEARCHES IN JAVA, &c. 
A. Skull of the Semnopithecus Maurus, the natural size reduced one-third; the posterior portion 
having been removed in the preparation of the subject to which the skull l>elonged, the 
contour is indicated by a dotted line, from a skull contained in the Museum of the Royal 
College of Surgeons, 
B. Teeth in the upper jaw of the same, of natural size, seen from above. 
C. Profile of the same. 
D. Canine tooth in the upper jaw of the same, with the entire roots; shewing the interior surfaces, 
and the grooves with which they are marked. 
E. Teeth in the lower jaw of the same, seen from above: a principal object of this view is to 
represent distinctly the jive points of the posterior grinder, by which character tiie genus 
Semnopithecus is distinguished from Cercopithecus. 
F. Profile of the same, exhibiting an exterior view of the relative situation of the canine tooth, 
and of the first grinder («). 
G. First grinder of the same, with its roots entire, shewing its interior surfaces. 
//. Teeth of the Simla syndactyla, or Siamang, in the upper jaw, of natural size, seen from 
above, from a skull contained in the Museum of the Royal College of Surgeons. 
/. Profile of the same. 
K. Teeth in the lower jaw of the same" seen from above. 
L. Profile of the same, exhibiting (a) the first grinder. 
M. Teeth in the upper jaw of a young subject of Simia syndactyla, of natural size, seen from 
above : from the Museum of Joshua Brookes, Esq. 
N. Profile of the same. 
O. Teeth in the lower jaw, from the same, seen from above. 
P. Profile of the same. 
Q. Skull of the Pteropus javanicus, of natural size. 
R, Teeth of the same, in the upper jaw, seen from above. 
S. Profile of the same. 
T. Teeth of th:> same, in the lower jaw, seen from above, 
U. Profile of the same. 
W. Profile of the head of the Pteromys genibarbis, somewhat enlarged, to shew the bristles 
disposed on the upper lip, on the cheeks, and on the lobes of the ears. 
JC. Bill of Calyptomena viridis, seen from above. 
F. Foot of the same. 
Z. Profile of the bill of the same; in (a) the aperture and direction of the tubular nares. 
