18 REPTILES. 
e. In spirits. Very young, like a,b. N. America. Presented by 
the Earl of Orkney. 
jf. In spirits. Young, like a, b. N. America. Presented by the 
Trustees of the Roy. Col. of Surgeons. 
Var. ? Spot larger; vertebral series broad ; transverse streak on 
back of neck not united to the foot-band ; no appearance of reddish 
dorsal streak. Perhaps a species. C. tergeminus, var. 
a. In spirits. N. America, Canada. Presented by J. Cruickshank, 
Esq. 
2. Say’s Fatsr Ratrie-snake. Crotalophorus tergeminus, 
Holbrook, N. Amer. Erp. iii. 29, t.5. Crotalus tergeminus, Say, 
Long's Exped. Rock. Mount. i. 499. Harlan, Med. and Phys. Res. 
135. C. miliarius, var. Schlegel, Phys. Serp. 569. 
Olive or cinereous, with three rows of dark brown spots; the 
vertebral series broad, oblong, transverse, with a broad streak ending 
in a transverse band behind, on each side of the back of the neck ; 
beneath dusky, varied ; cheek streak broad, distinct. 
Inhab. N. America, Rocky Mountains, Say. Mus. Dr. Hol- 
brook. 
Perhaps a variety of the former, or the same as the variety spe- 
cimen a, but the bands on the nape are united behind to the first 
spot. 
3. Kirriann’s RatTLe-sNAKE. Crotalophorus Kirtiandi, Hol- 
brook, N. Amer. Erp. iii. 31, t. 6. 
Black, varied with dusky brown, marked with three series of 
large dark spots, separated by a series of light brown rings on the 
back and vertical lines on the flanks, which are hardly visible in old 
animals. 
Inhab. N. America, Ohio and Michigan, Kirtland. Cab. Dr. 
Holbrook. 
10. Urnopsopuus. 
Head between and behind the eyes covered with keeled scales ; 
nose in front of the eyes, with three pairs of subsymmetrical shields ; 
superciliary shield large; temples covered with rather large flat 
scales; labial shields moderate, flat,—the first, fourth, and the hinder 
ones largest ; three series of flat loreal shields under the eyes; shields 
of two lower series of a moderate size ; the upper ones small, some- 
times wanting. 
