36 



PROCEEDINGS OF THE ACADEMY OF 



[1897. 



brown-gray " with a light dash of " red-brown " on the forehead, the 

 back and upper side of the thigh ; the sides of the head and neck 

 are dark brown, the breast whiter. The tip-of the tail is yellow and 

 bristle-like. T. fischeri (the T. fuseus of this paper) is of a reddish 

 yellow-gray, with brown-gray side of head and neck, a clear yellow- 

 white spot on the base of the ear, and a red-brown tip to the tail. 

 Two conclusions can be drawn from these excerpts: one that Bur- 

 meister's account of the specific distinctions is not satisfactory, and 

 that the Academy's specimen is remote from T. tarsias. It is in the 

 broadest possible way contrasted with the coloration of the figure in 

 Burmeister's memoir. Here the fur of the body and the limbs is of 

 a uniform yellow-gray, the head being somewhat darker, the tip is 

 scarcely more densely furred than the rest of the tail and not differ- 

 ently colored. 



THE AURICLE. 



Fig. 1. The auri- 

 cle of Tarsius tarsius 

 after Burmeister. 



The auricle is more rounded than in T. tarsius. 

 A distinct internal basal lobe is present, which, 

 however, is folded in against the auricle. The 

 outer border ends abruptly at the middle of the 

 large, rounded external basal lobe, which is ab- 

 sent in the species just named. The antitragus 

 is convex and projects but to a less degree than 

 the foregoing, and is separated therefrom by a deep 

 notch (indsura auris). The parts are carried 

 well down toward the neck, thus forming a true 

 conch. It is marked within, as in T. tarsius, by 

 four transverse ridges, the lowest of which (antitragus) forms a con- 

 spicuous lobe. The above comparison is based upon the figure in 

 Burmeister's memoir and the original of the Academy's specimen. 



Burmeister states that the ear on the whole 

 resembles in part that of bats and of rodents. 

 Concerning the first named it certainly bears 

 a comparison with the Pteropodidse, and (in less 

 degree) the Rhinolophidoe in the absence of the 

 conspicuous fold at the border of the external 

 auditory meatus held by the writer to be a 

 rudiment of the tragus. In no bat, however, is 

 the large transverse fold (antitragus) known. 



Fig. 2. The auri 

 cle of Tarsius fuseus 



