HYDRIDE 



HTDBIDJL 



r 4V>r. thS^04U India: Au.tr.li.. 

 J/. MM/AIM, U* WHO* SotflMk*. Singapore. 

 *. Bod* eortnd with smooth polished tebricaU wales ; bead u 

 Ur* M the body ; vratral shields rather Ivfc, tnuurerM, smooth, 

 folded tBg*tk)*r and keeled. 



10. Timf-fT n * with raguUr shield* ; superciliary shields 

 simple ; Trutnl shields entire. 



r/iy<iMW. lodUn Ocean. 



11. SrrpJUndsfsJr*. Head shields numerous; superciliary shields 

 I OF 4 i Tutrl hirld> iJk-k. .1 U hind. 



S.fm*a, Jokes'* Hyputruphi*. Durulcy Islands. 

 B. Head oor4 with olrt, like the body ; nostrita surrounded by 

 . SUM 11, eontiiiuou* ring; eyes surrounded by cries of small 

 oako ; UWal shields small, with larger team .bore them ; 

 papil rooa4 ; vrntnJ shield* very small, scale-like, separated on 

 muh aide f keeled ridge. The species are all inhabitants of 

 riven. AtrtckordiiM. 



It CVnfdru. Tul compressed, sword-haped, prehensile ; body 

 fuMform, coveted with small rhombic scales, with a central tubercular 

 , 



nimmlatiu, the Chenydrus. Madras. 

 C miWo.'H. Ma.lru. 



II. T^ oonieal, Uperinj. Belly n-undd beneath, with more or less 

 bro M rbaoaiik..luelds. Rim. or pond* 



A ' lUW !!i ; ^ "J* 1 ' Uoc " th ; W m i'l "hW-'s fl.t, .mall 



^,' ^ "" "* il1 *' " if tora ** >* *<> 

 a ,tdls ia a rinj of small scales; scale* keeled. 



II 



[Err] 



A Head shielded ; tail with two eerie* of shields beneath ; nostrils 

 between two shields; abdominal shields broad, keeled ou each, 

 side ; scales smooth, liitiana. 

 15. Sitia. Head small 



B. hydrvidtt. 



C. Head .-hi. !!. d ; scales striated, and keeled or smooth ; tail conical, 

 tapcriug, with two series of shields beneath ; nostrils iu o 

 of a large nasal shield, with a groove to the uuter M.I ; \ .-ntr.d 

 ' shields rounded (or rarely slightly keeled on the sides); frontal 



slueld* 8, rarely 2 or 4, all small C'crl/erin-j. 

 a. Crown scaly; occipital rudimentary; frontal* 4; anterior pair 



very small 

 18. Ctrbtrtu. Scales keeled, striated ; hinder labial shield low. 



C. einernu, the Karoo liokadam. India. 

 C. actttHt. Borneo. 



C. unicolor. Philippines. 

 C'. atutralii. Australia. 



ii. Crown shielded ; occipital moderate. 

 Head distinct, depressed ; froutaU 4 ; anterior pair small ; rostral 



rounded. 



1 7. /'crania. Scale* smooth ; seventh upper labial low, with a largo 

 shield over it. 



!'. .s'lVAoWii. Bengal. 



** Head distinct, depressed ; frontals 3 ; anterior transverse ; rostral 

 rounded. 



t Fourth and fifth binder labial shicldd small or divided. 



18. Uoauiloftii. Scales keeled. 

 //. l/ucca/a. Java. 



Jl. Jhinlic.ct-ii. India. 



19. Phytolopsit. Scales smooth. 

 P.punctata. India, 



ft Hinder labial large, like others ; scale* keeled ; rostral rou 



20. I'l-anai*. Scales truncated, strongly keeled, striated; eye over 

 fourth shield. 



r. aagulatui. Tropical America. 



21. Tachyntelei. Scales truncated, strongly keeled. 

 T. Ltopardina. 



22. TiiijiiJofhit. Scales ovate, keeled, striated ; eye over fourth an 1 

 fifth shield. 



T. Sckittotus, the Chiltee, Ceylon. 



23. Myron. Scales ovate, slightly keeled, smooth. 

 .V. llic/ianlionii. Australia. 



.!/. tfirittatut. India. 



24. Jftlicop*. Scales ovate, polished; of back and tail 1. 

 11. carinacaudiu. North America. 



tt+ Hinder labials large, like others ; scales smooth ; rostral rounded. 



25. Ilyptii-hina. Seventh labial large; eye over fourth and fifth 

 labial ; loreal distinct. 



J/.jilumltea. Borneo. 



Jl. y/aix/iricA-ii. Peuang. 



//. .1 er, the Ular Acr. Borneo. 



//. l,iliniala. China. 



Jl. f'liintiait. China. 



11. Jiaaicttii. Cuina. 



26. /'iirnncia. The seventh labial large ; eye over the third and 

 fourth labial 



/'. fatciatd, the Woinpan-Snakc. New Orleans. 



27. J/yiiroja. The seventh labial large : eyes over the fourth labial ; 

 ventral nbield broad ; body thick ; loreal none. 



//. J/m-fii. Brazil 



28. ffvgina. The seventh labial large ; eyes over the fourth labial ; 

 ventral shield narrow ; body Mender; loreal none. 



//. /iucia/a. Dcmerara. 



29. JHmadet. The seventh labial short, small ; eye over third and 

 fourth labial ; loreal. none. 



1>. j'licatilit. New Orleans ; North America, 



Head moderate, depressed ; frontal 8 ; anterior elongate, erect,. 

 between the nasals ; seventh smooth ; rostral rounded. 



30. Pordonia. Scales broad, rhombic ; ventral shield rounded ; 

 loreal none ; eye over third labial 



/'. IrueoLalia. Timor. 

 P. mi tco/or. Borneo. 



31. lirranlii. Scales broad, rhombic ; ventral shields roundsJ ; eyo 

 over f,.mili -l.i.-ld ; loreal square. 



'. lirolor, the Ocrard. West Indies. 



32. J/ipiitrt. Scales narrow, flattened; ventral shields keeled at 

 each end ; loreal square. 



li./aitraiui. West Indies. 



"" Head indistinct; frontal 4 ; anterior 4-eided, rather smaller; 

 scales smooth ; body cylindrical. 



