236 COLUBEID^. 



p. 133 (1876) ; Boettg. Ahh. Senek. Oes. xiii. 1883, p. 101 ; De 



Betta, Atti Jst. Ven. (7) i. 1883, p. 984 ; Bedriaga, Amph. et Rept. 



de Portug. p. 71 (1890) ; Camerano, Mon. Ofld. Ital., Colubr. p. 30 



(1891) ; Bouleng. Tr. Zool. Soc. xiii. 1891, p. 149. 

 Tropidonotus oppelii, Boie, I. c. 



tessellatus, part., Wagl. Syst. Amph. p. 179 (1880). 



Natrix viperina, Bonap. Faun. Ital. (1884) ; Gen&, Mem. Ace. Torin. 



(2) i. 1839, p. 269, pis. ii. & iii. 

 Coluber viperinus, var. aurolineatus, Qervais, Ann. So. Nat. (2) vi. 



1836, p. 312. 

 Tropidonotus viperinus, part., Schleg. Phys. Serp. ii. p. 825 (1837) ; 



Dum. ^ Bihr. vii. p. 660 (1854). 



(Coronella) tesselatus, Eichw. N. Mlm. Soc. Nat. Moscou, ix. 



1851, p. 440. 



chersoides ml ocellatus, Dum. Sf Bibr. t. c. p. 562 ; Lataste, 



CR. Soc. Linn. Bm-d. 1874, p. clxxiii. 



Eye rather small. Rostral broader than deep, visible from above ; 

 nasal usually semidivided ; internasals as long as broad or longer, 

 subtriangular, truncate in front, as long as the praefrontals ; frontal 

 once and a half to twice as long as broad, as long as its distance from 

 the end of the snout, shorter than the parietals ; loreal as deep as 

 long, or a little deeper ; one or two prseoculars ; two postoculars ; 

 temporals 1 + 2 or 1 + 3 ; seven upper labials, third and fourth 

 entering the eye ; four (rarely five) lower labials in contact with the 

 anterior chin-shields, which are shorter than the posterior. Scales 

 strongly keeled, of outer row smooth or feebly keeled, in 21 (rarely 

 23) rows. Ventrals 147-160 ; anal divided ; suboandals 47-72. 

 Grey, brown, or reddish above, with a black zigzag dorsal band and 

 a lateral series of black ocellar spots with a yellow centre ; a more or 

 less distinct oblique dark band on the temple, and another on each 

 side of the nape ; labials yellow, with black sutures ; belly yeUow 

 or red, checkered with black, or entirely black. 



Total length 850 millim. ; tail 170. 



France, Switzerland, Italy, Spain and Portugal, Barbary. 



A. Typical form. 



a-b. S (V. 148; 0. 69) & Tanaro Valley, Pied- Count M. G. Peracca 



yg. (V. 150 ; C. 58> mont. [P.], 



c-d. Hgr. S (V. 151 ; C. ?) Sardinia. Count M. G. Peracca 



& S (V. 156 ; C. 54). [P.]. 



e. Yg. (V. 148 ; C. 53). Albufera de Valen- Lord Lilford [P.]. 



cia, Spain. 

 /. <S (V. 161 ; C. 64). Seville. M. V. L. Seoane [P.]. 



g'-t. c? (V. 165; C. 56), ? Alemtejo, Portugal. Dr. H. Gadow [0.1. 



(V. 151; 0.47), &yg.(V. 



158 ; 0. 58). 

 k-l. d (V. 167, 151 ; C. 61, Serra de Gerez, S. Dr. H. Gadow [0.]. 



61). Portugal. 



»i-». Hgr. cJ (V. 152 ; 0. Tangier. Mr. Fraser [C.]. 



62) & hgr. Q (V. 164: 



0.63). 

 o-p. 2 {V. 154 ; 0. 57) & Tangier, M. H. Vaucher TO.]. 



yg. (V. 167 ; 0. 61). 



