GALEOPITHECUS. 451 



that for the cerebral lobes, and two longitudinal ridges upon 

 the inner face of the latter, prove that these lobes must 

 have possessed coiTesponding sulci. The tentorial plane is 

 nearly vertical and the fioccular fossae are very deep. 



The ulna is very slender inferiorly, where it becomes 

 ankylosed to the distal end of the radius, which bears the 

 carpus. When the ilia are horizontal, the acetabula look 

 a little upwards and backwards as well as outwards. The 

 fibula is complete. As in the Sloths and most Primates, 

 the navicular and cuboid readily rotate upon the astra- 

 galus and calcaneum, so that the planta pedis is habitually 

 turaed inwards. 



The dental formula is i. — c. - — r p.ifn. m. ^ — r = 34. 



3-3 1 — 1 ■'■ 5—5 



The outer incisor, in the iipper jaw, has two roots, a 

 peculiarity which is not kno^vn to occvir elsewhere. The 

 canines of both jaws also have two roots, as in some other 

 Insectivora. The lower incisors are single-fanged ; and 

 their crowns are broad, flat, and divided by numerous 

 deep longitudinal fissures, or " pectinated." 



The length of the whole alimentary canal from mouth to 

 anus is not more than six times that of the body. The 

 sacculated ccscum is as long as the stomach, and its capacity 

 must be greater than that of the latter organ. 



Qaleopitliecus has, at one time, been placed among the 

 Lemurs, and at another, amonw the Bats. Biit the resem- 

 blances with the former are general and superficial, and 

 the differences in the form of the brain, the dentition, the 

 structure of the limbs and of the skull, exclude it from 

 the order of the Primates. 



Galeo2nthecus agrees with the Bats in the disposition of 

 the taU, and in the existence of a patagium provided with 

 special muscles. Further, in a slight obliquity of the 

 acetabula, such as is seen in its extreme development in 

 the Bats ; in the imperfect condition of the ulna3 ; and in 

 the pectoral position of the teats and the fiendent penis. 

 Both of these last, however, it must be recollected, are also 

 Primatic characters. Finally, the somewhat similarly pec- 



