SNAKES. 85 



4. Elaphis. Rostral moderate. Body and tad elongate, 



rather compressed; two anterior, two posterior oculars. 

 Scales keeled. Teeth equal. Europe ; Asia. 



5. Cynophis. Muzzle much elongate. Body and tail com- 



pressed; one anterior, two posterior oculars. Scales 

 keeled. Pterygo-palatine teeth bent inwards. East Indies. 



6. Spilotes. Rostral moderate. Body and tail much elon- 



gate and compressed ; one anterior, two or three posterior 

 oculars. Teeth equal. East Indies; South America. 



7. Zamenis. Body and tail moderate or slender. Posterior 



maxillary tooth longest, separated by an interspace. Shores 

 of Mediterranean ; Asia. 



8. Coryphodon. Maxillary teeth becoming gradually stronger 



and longer behind. East Indies ; America ; Africa. 



1. Rhinechis, Michahelles. 



Body moderate, rounded ; tail short ; head conical, short, with 

 pointed muzzle. Rostral much protruding, higher than broad, 

 sharply pointed behind, far produced backwards ; one loreal ; one 

 anterior, two or three posterior oculars. Scales smooth, small, 

 in twenty-seven rows. Teeth equal, smooth. South Europe. 



Rhinechis, Michahelles in Wagler's Icon.; Bonap. Faun. ItaL; 

 Dum. Sf Bibr. vii. p. 227. Xenodon, sp., Schlegel, Ess. ii. p. 92. 

 Coluber, sp., Schinz, in Uebersetzung von Cuvier's Tkierreich ; 

 Boie, Isis, 1827, p. 536. 



1. Rhinechis scalaris. 



Coluber scalaris, Schinz, in Cuvier's Tkierreich iibers. von 

 Schinz; Boie, Isis, 1827, p. 536. Rhinechis Agassizii, Micha- 

 helles, Wagl. Ic. t. 25. Xenodon michahelles, Schleg. Ess. ii. 

 p. '.)2. Rhinechis scalaris, Bonap. Faun. Ital. pi. ; Dum. $• 

 Bibr. p. 227. 



Two dark brown longitudinal stripes on the back. 



a. Half-grown. Europe. From M. Parzudaki's Collection. 



b. Adult : bleached. Europe. 



2. Pituophis, Holbrook. 



Body moderate, rounded; tail moderate; head conical, with 

 pointed muzzle. Rostral protruding, raised above the surface of 

 head; one loreal, one or two anterior oculars, posterior ones 



