157 



713. The skull of the CroeoMiu ant**. Number of alveoli in the premaxillary, 

 . in the maxillary, 1414 ; in the dcntary, 1515. 



714. Tlu- skull of the Crocodile acithu. Number of alveoli in the premaxillary, 



4 5 ; in the maxillary, 14 14; in the dentary, 15 15. //>t*/rrian. 



715. The skull of the Crocodilu* acntiu. Number of alveoli in the premaxillary. 



55 ; in the maxillary, 14 14 ; in the dentary, 1515. llmiteriam. 



716. The skull of the Crocodile acntiu, wanting the lower jaw. Number of alveoli 



in the premaxillary, 5 5 ; in the maxillary, 14 14. Mm. Brit. 



717. The mutilated and distorted skull of a young Nilotic Crocodile (Crocodil** 



tmfyaru). 



The extremity of the upper jaw is raited above the plane of the upper surface of the skull, 

 producing a marked concavity between the orbit* and the external nostril. The under jaw is 

 correspondingly curved, except at it* extremity. The bate of the cranium has been removed, 

 and both tympanic cavities are laid open ; the Hie, shape and relative position of the small 

 prtrosal being well shown on the left tide. Number of alveoli in the premaxillary, 5 5 ; in 

 the maxillary, 1414 ; in the dentary, 1515. 



tlmtlerian . 



718. The skull of a young Crocodile, apparently of the Nilotic species (Crocodil** 



rmfyarit). 



The palatine suture between the premaxillary and maxillary bone* psasfi obliquely back- 

 wards a little way at its commencement and then extends transversely icrnas ; but the prr- 

 maxfllary bone* an longer than in the second Gangetic specie*. There U a email palpebral 

 otaide above the anterior angle of the eyelids. Number of alveoli in the premaxillary, 55 . 

 in the maxillary, 1313. 



Huiiteria*. 



719. The skeleton of the Gangetic Crocodile (Crocodiltu biporcabu). 



In this skeleton may be noticed the chief osteological characters by which the order Crv 

 eeAlia fa distinguished from the order Lacertilta. First, the confluence of the external bony 

 nostrils into a single BMdisii, subcircular foramen : the implantation of the teeth in distinct 

 lockets : the fixation of the tympanic by being wedged between the mastoid and squamosal, 

 Modification which gives the requisite firmness of support to the strong and msm under- 



