ORBITO-TEMPORAL 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 alisphenoid. 

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

 maxillary, which is very small and only partially ossified, meets 

 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-fisure 3, 



The orbito-temporal region in the fcEtal i. eatta. 



i. =lachr}'nial. l^. = frontal. PaZ.=palatine. O.S.= orbito-sphenoid. 

 ^.S.= Alisphenoid. P.=parietal. il!f.=maxilla. 



. In the other specimen, which is rather more advanced in 

 ossification, the condition is similar in all essential 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 Leimir 



