410 



COLCTBRIDiE. 



fifth or sixth veiT rarely entering: the ej-e ; four lower labials in 

 contact with the anterior chin-shields ; posterior chin-shields longer 

 than the anterior, narrow and separated from each other by two or 

 three series of scales. Scales perfectly smooth, in 25 to 29 rows, 

 usually 27. Ventrals very distinctly angulate laterally, 222-258 ; 

 anal divided (rarely entire) ; subcaudals 77-107. Brown, reddish, 

 or pale olive above, with a dorsal series of large dark bi'own, black- 

 edged rhomboidal spots, on each side of which is a series of smaller, 

 alternating spots ; these spots may be black and so large as to reduce 

 theground-colour toamerechain orseriesof X's ot pale colour ; a dark 

 cross band between the eyes, and a A- or horseshoe-shaped band on 

 the back of the head, which may be confluent with an elongate spot 

 on the nape ; the spots confluent into three longitudinal streaks on 

 the tail ; yellowish or red inferiorly, with or without black dots, 

 but constantly with a lateral series of black spots. 



Total length 1340 millim. ; tail 270. 



Spain and Portugal, Sardinia, Morocco, Algeria, Tunisia. 



28. Zamenis dorri. 

 Periops dorri, Lataste, Le Natitr. 1888, p. 227. 



Head very distinct from neck, with broadly rounded snout. 

 Rostral broad, just visible from above ; internasals slightly shorter 

 than, the praifrontals ; frontal a little longer than broad, shorter 

 than the parietals ; loreal longer than deep ; one praeocular, in 



