Ml 



Genus Istitrun. 



(>70 The elrvon anterior vertebra! of the trunk, with the scapulo-coracoid arch of 

 the deep-tailed Liiard (Istiuriu amAoittiuu). 



The atlas raMsnhles that of the frssfaj^irs. but iu hypapophyais is ICM produced iul 

 r t the true centrum or odontoid has coalesced with that of the axis. The byp- 

 of the four following vcrtefane are oootprewed and produced both forward! and 

 They are independent element*, and are articulated to the interspace between 

 their own mtebrsB and the one in advance. The pleurapophyses commence at the fifth ver- 

 tebra in the form of abort, slightly-curved styles : they progressively increase in length to 

 the ninth vertebra, where they are united by hnmapophyse* to the iternum. The tenth an<l 

 , Tertebne have their ribs similarly and independently united with the sternum. The 

 is im perforate. The clavicles are broader than hi the Grmmmmtopkora, and have a 

 aharp patteriM margin. The episternum preaenu a rhomboidal dilatation anteriorly : the 

 scapula and cormcoid hare coalesced : the roracoid presents the usual deep anterior notch and 

 foramen. The scapula ha* two large and deep anterior notches, the upper one converted into 

 a long oval foramen by a continuation of the semiossified supratcapula to the extremity of the 

 long proOES. dividing the two notdMK 



//unteria*. 







677. Four caudal vertebrae of the 1st turns amboineiuit. 



These show the development of the neural spines into long and slender rib-like pieces. The 

 hmnapophyses are produced into comparatively short spines : the}' are firmly articulated to 

 the interspace* between their own vertebra and the one behind. Short and straight an- 

 chylosed plcurapophyae* represent the transverse processes in this region of the tail. 



Hxntrrim. 

 Family l'a remit/a. 

 Genus Varanu*. 



678. The skeleton of the large Monitor (I'aramu nilotictu). 



The number of vertebrss between the skull and sacrum is 29, in the sacrum 2, in the tail 

 M i, = 1 1 1 . Both the hypapophysis and the centrum (odontoid) of the atlas send down 

 i which continue to be developed from the under part of the centrum in the 

 ftebrse. The pleorapophyses begin to be developed from the sixth cer- 



vical vertebra : they are very short, and are appended to a short, thick, bilobed, i 

 process, which appears to combine both parapopbysi* and diapophysis. They rapidly increase 

 in length, and in the tenth vertebra are joined by the medium of semiossified hsemapophy ses 

 to the sternum : this is, also, the case with the eleventh and twelfth ribs : in the following 

 the hcmapophyscs are reduced to short appendages attached to the end of the pleor- 



