XI. 



TELEOSAURUSTHE HEAD. 



187 



of which enters the orbit. Anterior frontals define a portion of 

 this orbit, and conduct the eye to two small oblong lacunaB or 

 foramina, apparently placed as the nares in plesiosaurus, without 

 however, as far as I see, any so-called lachrymals. Nasal bones, 

 springing from the frontals, advance along the mesial line to a meet- 

 ing at an acute angle, and then the joined maxillary bones, bearing 

 teeth, succeed, and separate near the end of the beak to admit 

 an enlarged breadth of intermaxillary bones perforated by the 

 external nares (see Diagram XLIII. fig. i). The nostrils open 

 externally in a nearly-circular hollow at the end of the beak, not, 

 as in steneosaurus, near the end (see Diagram XLV.). 



Diagram XLIV. Teleosaurus. Scale one-tenth of nature. 



I. Teleosaurus, lower jaw, seen from above, 

 shewing projecting teeth (incisors and canine), 

 nature, shewing the curved junction. 



2. End of jaw seen from above, 



3. Side of the jaw closed as in 



On the under side the palatal surface is nearly plane, the interior 

 nares very far back, much as in the gavial. The pterygoidal bones 

 are seen in a fine specimen of Mr. J. Parker, and resemble those 

 of crocodiles. The articulating faces of the jaws are long, narrow, 

 oval, contracted, and undulated in the middle. Their long axes 

 lie nearly in a horizontal plane, but are directed a little backward, 

 so as to be inclined to the mesial line 80. 



The lower jaw seen from above consists of two curved rami 

 sweeping outward and backward from the long symphysial line, 

 which, however, is not in this species so long as the branches. In 

 the gavial it is longer. The articular bone which terminates the 



