GALEOriTHECUS. 383 



cuboid readily rotate upon the astragalus and calcaneum, so 

 that the planta 2)edis is habitually turned inward. 



The dental formula is ^. ^ c. -^^p.'in. m. ^ = 34. 



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

 peculiarity which is not known to occur 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 longitu- 

 dinal 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 sac- 

 culated cjecum is as long as the stomach, and its capacity 

 must be greater than that of the latter organ. 



Galeopithecus has, at one time, been placed among the 

 Lemurs, and at another, among the Bats. But the resem- 

 blances with the former are general and superficial, and the 

 dififerences in the form of the brain, the dentition, the structure 

 of the limbs and of the skall, exclude it from the order of the 

 Primates. 



Galeopithecus agrees with the Bats in the disposition of 

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

 special muscles. Further, in a slight obliquity of the acetab- 

 ula, such as is seen in its extreme development in the Bats ; 

 in the imperfect condition of the ulnae ; and in the pectoral 

 position of the teats and the pendent penis. Both of these 

 last, however, it must be recollected, are also Primatic charac- 

 ters. Finally, the somewhat similarly pectinated lower incisor 

 teeth are found in the Cheiropteran genera, Diphylla and 

 Desmodus. 



But Galeopithecus diff'ers from the Bats completely in the 

 structure of the fore-limbs ; in the position of the hind-limbs 

 and the absence of a calcar ^ in the two-fanged outer incisors 

 and canines ; and in the presence of a cascum. 



On the other hand, the peculiarities of the skull and brain 

 are mainly insectivorous, as is the two-fanged canine ; and 1 

 see no reason for dissenting from Prof. Peters's view that Gal- 

 eopithecus belongs neither to the Primates, nor to the Chei- 

 roptera, but that it is an aberrant Insectivore. 



With respect to other Insectivora, it is worthy of note, 

 that Macroscelides has the radius and the ulna anchylosed. 

 The TupaycB possess a large Ciecum. Chrysochloris has pec- 

 toral mammary glands ; Centetes and the Moles have the penis 

 pendent. 



