ORBITOTEMPORAL REGION OF SKULL OF LEMUR. 327 



front with the lachrymal, and behind the orbital plate of the 

 frontal it is in contact with the orbito-sphenoid and alisphenoicl. 

 Below, the greater portion of its length is free, bnt, in front, the 

 maxillary, which is very small and only partially ossified, *neets 

 its lower border. This long bone is the orbital process of the 

 palate, and at about its mid-point it is perforated by two foramina, 

 presumably the naso-palatine canals. 



Text-figure 3. 



The orbito-temporal region in the foetal L. catta. 



i.=lachrymal. F. = frontal. Pal. = palatine. O.S.= orbito-sphenoid. 

 A.S. = Alisphenoicl. P. = parietal. M. — maxilla. 



In the other specimen, which is rather more advanced in 

 ossification, the condition is similar in all essentia] points. The 

 sphenoid and the maxilla are somewhat further ossified ; but 

 the most interesting feature is a slight bending of the axis of 

 the orbital plate of the palate at the site of the naso-palatine 

 foramina (see text-fig. 4). 



In the adult of Lemur catta the picture has changed very 

 remarkably, for the portion of the palate anterior to the naso- 

 palatine canals has become inflated with an air-sinus ; and it has 

 been somewhat bent back over the uninflated plate posterior to 

 these canals (see text-fig. 5). 



Reference to Forsyth Major's figures of the orbit of Lemur 



