60. COLUBER. 



B. Scales keeled ; anal entire. 



A pair of praefrontals ; two labials entering 



the eye ; rostral not or but slightly 



deeper than broad ; scales in 27 or 29 



rows 43. deppii, p. 66. 



I 'rut' rentals usually broken up into two 



pairs or more ; not more than one labial 



entering the eye ; rostral not or but 



slightly deeper than broad ; scales in 29 



to 35 rows 44. catenifer, p. 67. 



Praefrontals broken up into two pairs or 



more ; rostral much deeper than broad, 



the portion visible from above measuring 



more than half its distance from the 



frontal ; scales in 29 to 35 rows 45. melanoleucus, p. 68. 



TABLE SHOWING NUMBERS OF SCALES AND SHIELDS. 

 I. Old-World species. 



