148 



vertebra join the sternum, as do those of the ninth and tenth : the pleurapophyses of the 

 eleventh vertehra suddenly acquire extreme length ; those of the five following vertebrae are 

 also long and slender ; they extend outwards and backwards, and support the parachute 

 formed by the broad lateral fold of the abdominal integuments. The pleurapophyses of the 

 seventeenth vertebra become suddenly shorter, and these elements progressively diminish to 

 the sacrum : this consists of two vertebrae, modified as in other Lizards. There are about 

 50 caudal vertebrae. 



Purchased. 

 %. 

 Genus Grammatophora. 



674. The anterior vertebrae of the trunk, with the scapular arches of a Lizard 

 (Grammatophora barbata, Kaup). 



The atlas consists of four parts, a hypapophysis, a centrum, and two neurapophyses : a 

 long compressed haemal spine is developed downwards and backwards from the autogenous 

 hypapophysis. The right neurapophysis is removed to show the proper centrum of the atlas 

 or odontoid process : it is here restricted to an articulation with the hypapophysis of the 

 atlas, and to the formation of a similar long recurved process : a smaller hypapophysis is 

 wedged into the inferior interspace of the axis and third vertebra, between the third and 

 fourth and between the fourth and fifth vertebrae : the pleurapophyses begin to be developed 

 at the fifth vertebra, and are attached by a compressed, expanded, simple head to a broad 

 diapophysis : they are simple, slender styles, progressively elongating to the ninth pair, which 

 is the first to be provided with haemapophyses articulated to the sternum. The ribs of the 

 tenth and eleventh vertebrae are similarly and separately joined to the sternum : the haemapo- 

 physes of the twelfth and thirteenth vertebrae unite with each other before joining the poste- 

 rior angle of the sternum. 



The scapula and coracoid have coalesced, but traces of the original suture remain : there 

 is a large semiossified suprascapula : the coracoid is deeply notched anteriorly and perforated. 

 The clavicles are long, slender, and slightly bent. The episternum is anchor-shaped, with a 

 broad and thin stem, ^he sternum has three perforations near its posterior margin. 



Presented by Prof. Owen, F.B.S. 



675. The hyoid apparatus, with the dried tongue and trachea of the Grammatophora 



barbata. 



The basihyal is prolonged into a slender pointed urohyal. The ceratohyals are articulated 

 with the posterior angles of the basihyal ; are short and directed forwards : to their extremi- 

 ties are attached the long and curved epihyals : the similarly-shaped but stronger thyrohyals 

 articulate with both the basi- and cerato-hyals : the rings of the trachea are slender and 

 complete. 



Presented by Prof. Owen, F.R.S. 



