ZOOLOGY-REPTILES. 
19 
of tail, exclusive of rattles, 21 inches ; total length, 2 feet 4 inches. Of a larger specimen : 
length of head, 1^ inch ; greatest breadth, 1^ inch ; length of body, 2 feet 9 inches ; of tail, 
exclusive of rattle, 3 inches ; total length, 3 feet 1-| inch. 
Habitat. —Country intermediate between Run river and Tahon ; also, borders of El Paso 
creek. 
General Remarks. —The smaller specimen described and figured in Sitgreaves’ report appears 
to be identical with the confluentus of Say. C. Lecontei differs from the confluentus of Say, as 
characterized by Professors Baird and Girard, in having but two rows of scales between the 
suborbital series and the supralabials instead of four ; in the fewer number of scales between 
the nostrils, (4 instead of 6) ; in the less number of dorsal rows ; in the rostral plate being 
without a margin of white, &c. The stripe from the superciliaries, which is not very distinct, 
appears to pass over the third and fourth rows of scales above the supralabials in confluentus 
the second. 
