434 QUADRUMANES. 



intermaxillary bone, presents the peculiarity of an insertion by two 

 fangs in both species of Galeopithecus ; its crown is a compressed 

 triangular plate, with a small talon at the anterior and posterior part 

 of the base in Gal. Philippinensis, and with two anterior and three 

 posterior dentations in Gal. Temminckii. The upper canine (c) very 

 closely resembles the second incisor, and is also implanted by two 

 fangs. The first upper premolar (p) has a trihedral crown, more 

 simple and compressed in Gal. Temminchi than in Gal. Philippinensis ^ 

 in which the crown supports two triangular prisms, with one side 

 turned outwards and one angle inwards ; the crown of the second 

 premolar has, besides the two prisms, a pointed talon at the base 

 of the internal space between the prisms. In the true molars (m) 

 the internal talon is relatively larger, and wdien the prisms are 

 worn down to its level they present a broad triturating surface. 



In the lower jaw the crowns of the first two incisors (i) present the 

 form of a comb, and are in this respect unique in the class Mammalia : 

 one is figured of the natural size in PI. 115, fig. 1, and magnified at 

 fig. 1^. This singular form of tooth is produced by the deeper 

 extension of the marginal notches on the crown, analogous to those 

 on the edge of the new-formed human incisor ; the notches being 

 also more numerous as well as deeper : each of these broad pectinated 

 teeth is implanted by a single conical fang.(l) The third incisor, 

 viewed through the analogy of the Lemurs seems to be a canine, but 

 in nature its crown is in advance of the last intermaxillary tooth above : 

 the margin of the crown is broad, horizontal, and is indented by 

 shallow notches which are four in number in the Philippine Colugo ; 

 in both species this tooth is supported by a single fang. The lower 

 canine (c") nearly resembles the upper canine, has two fangs, but 

 has a rather shorter crown, which passes before that of the upper 

 canine when the mouth is shut : its oblique margins are dentated in 

 the Galeopithecus Temminckii, and entire in Gal. Philippensis. The 

 first premolar resembles the canine, but has a thicker and a lower 



(1) The Colugos have a large coecum, and are said to feed on the leaves of the Nanka or 

 Jack-fruit : they may also derive part of their diet from small birds or insects ; but the mode 

 in which the crowns of the molar teeth are abraded by mastication indicates the preponderance 

 of vegetable food. The pectinated lower incisors may serve to trim the fine fur with which 

 they are clothed. 



