187 



Genoa Hprra. 

 646. The skeleton of the Viper (Fipera benu. Linn.). 



It iiuaniiTi twenty inches in length, and has 187 Tertebne, of which li-1 tupport movrahlr 

 rib*, from all of which the hypapophyti* it developed, though of (mailer tise in the poitehor 

 than in the anterior half of the trunk. The number of caudal rertebne, or those with anchy- 

 lo*ed riot, bifurcate in the anterior one*, it S3 : the hypapophytM begin to bifurcate in the 

 last three abdominal vertebne, the fork* icparmtiug into dutinct proccMe* in the caudal 

 vertebra. 



Mm. South. 



Genus Hydnu (Water Snakes). 



647. Ten abdominal vertebne of a Sea-serpent (Hydnu tricolor). 



The height of the neural ipine (M) i* greater in proportion to it antero-pocterior rxtrat 

 than in any of the foregoing Ophidian*. The diapophysi* *end* a point outward* a little be- 

 yond the articular ratface of the anterior sygapophym ; a very tmall hypapopbyM project* 

 below the articuUr ball of the centrum, and a low ridga U continued forward* from it ; the 

 posterior border of the ncurmpophyiu form* no angle, but i* moderately convex, a* in all the 

 foregoing Ophidian*, excepting the Sry*. 



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



648. Ten posterior abdominal vertebne of a Sea-serpent (Hydnu tricolor). 



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



649. The poison-fangs of a Sea-serpent (Hydnu bicolor). These are the original 



described in the ' Philosophical Transactions/ 1818, by Thomas 



Smith, Esq., in a Memoir on the Poison-Fangs of Serpents. 



Presented by the Author. 



Species indetem. 



650. The skin and skull of a Urge poisonous Serpent from New Holland : a bristle 

 is pawed through the poison-canal of the left fang. Three successional fangs 

 may be seen in different stages of growth behind the principal ones, which 

 have become anchj losed to their jaw. Hunterian. 



