54. zAMExis. 379 



54. ZAMENIS. 



Ilaemorrhois, Sote, Isis, 1826, p. 982, and 1827, p. iJ3S (uoni. mul.) ; 



Eichic. Faun. Casp.-Cauc. p. 113 (1841). 

 'l>Tia, part., Fitzinr/. N. Class. Rept. p. 29 (1820). 

 Ziimt'iiis, ])art., Wcujl. Sif.<t. Avijth. ]>. 188 (1830). 

 Periops, Wagl. I. c. p. 189 ; Ihim. ^- Bibr. Erp. Gen. vii. p. 674 (18o4); 



Jan, Elcnco sht. Ojid. p. ;j9 (1863). 

 Coluber, part., iSchley. J-hys. Serp. ii. p. 12o (1837). 

 Psanmiophis, part., Schley. I. c. p. 201. 

 Zamenis, Diun. S,- Bibr. t. c. p. 683; Giinth. Cat. Col. Sn. p. 101 



(1858) ; Jan, I. c. p. 6o : Giinth. Rept. Brit. Ind. p. 252 (1864) ; 



Boconit, Miss. Sc. Me.v., Rej>t. p. 66o (1888); Botdeny. Faun. 



Ind., Rept. p. 323 (1890). 

 Bascauion, Baird S,- Gir. Cat. N. Am. Rep)t. p. 93 (1853) ; Boeourt, 



op. cit. p. 697 (1890); Cope, Proc. U.S. Nat. Mas. xiv. 1892, 



p. 021. 

 Masticophis, Baird ^ Cfir. I. c. p. 98 ; Jan, I. c. p. 64. 

 Salvadora, Baird ^- Gir. I. c. p. 104 ; Jan, I. c. p. 58 ; Boconrt, I. c. 



p. 060 (1888) ; Cope, I. e. p. 618. 

 Corj'pbodon, part., Dmn. i^- Bibr. t. c. p. 180; Giinth. Cat. p. 107 ; 



Jan, I. c. p. 63. 

 Ilerpetodryas, part., Dum. ^- Bibr. t. c. p. 203 ; Giinth. Cat. p. 113 ; 



Jan. 1. c. p. 80. 

 Leptophis, part., Dum. l^- Bibr. t. c. p. 528. 

 Ptvas, Cope, Proc. Ac. Philad. 1860, p. 503 ; Giinth. Rept. Brit. Ind. 



p. 248. 

 Phimothyra, Cope, I, c. p. 560. 



Platvceps, Bh/th, Journ. As. Soc. Beny. xxix. 1860, p. 114. 

 Tyria, Cope, Proc. Ac. Philad. 1862, p. 338. 

 Megablabes, Giinth. Ann. cV May. N. H. (3) xy. 1865, p. 92. 

 Spalero^opbis, Jan, in De Filippi, Viayy. Pers. p. 356 (1865). 

 Cbilolepis, Cope, Proc. Am. Philos.Soc. xxiii. 1880, p. 491. 

 Drymobius, part., Bocourt, op. cit. p. 715 (1890). 



Maxillary teeth 12 to 20, increasing in size posteriorly, forming 

 a continuous series or the two last separated from the others by a 

 very narrow interspace ; mandibular teeth suhequal, or anterior 

 slightly enlarged. Head elongate, distinct from neck ; eye mode- 

 rate or large, with round pupil; xisually one or more suboculars. 

 Hody elongate, cylindrical ; scales smooth or feebl}' keeled, with 

 apical pits, in 13 to 4;J rows ; ventrals rounded or with an obtuse 

 lateral keel. Tail moderate or long ; suhcaudals in two rows, 



Europe; Asia; ^'oith Africa ; feenegambia; North and Central 

 America. 



As observed by Dr. Giinther in 1SG4 (Eept. P»rit. Ind. p. 252), 

 the species of this genus afl'ord a complete transition from the 

 '' Coryphodont" dentition as exemplified by Z. korros or Z. con- 

 strictor to the somewhat ill-defined " Diacranterian " type as shown 

 by Z. gemonensis, the skull of which is here figured. 



