1852.] a ; 207 
The specimen above described was found by Dr. G. F. Hammond, and pre- 
sented by him to the Academy. 
CROTAPHYTUS, Holbrook. 
CROTAPHYTUS FASCIATUS. 
Sp. Char. Head of moderate size, triangular, slightly swollen at the temples; 
body slender; anterior extremities idem; tail nearly three times as long as the 
body (including neck and extending to vent ;) body covered with small granu- 
lations, ash colored, with seven or eight narrow transverse bands upon the back 
of the color of vermillion; bands of a similar color upon the tail; legs banded; 
abdomen covered with quadrangular scales: flesh-colored; femoral pores in the 
male very distinct. 
Description. ‘The head is subtriangular, rounded in front, slightly swollen at 
the temples, covered above with polygonal tubercles, larger anteriorly ; a row 
considerably larger than the rest runs along the middle line of the front part of 
the head, midway between the nostrils; these tubercles are much smaller and 
of moie uniform size upon the temples; they are also small over the orbits; the 
occipital plate is of moderate size, and rather indistinct; the supraciliary ridges 
are well developed; the external margin of the eyelid is bordered with a row 
of quadrangular scales, external to which is another row upon the lower lid, 
with pointed extremities, presenting a well-marked denticulation; the lids are 
covered with minute granulations; the nostrils are large, oval, lateral, looking 
outward and slightly backward, situated in a single scale; the rostral plate is 
narrow, quadrangular, much more extended transversely than in the vertical 
direction ; the upper jaw is bordered with a row of seventeen plates ; the exter- 
nal opening of the ear is very apparent, oval, its anterior border presenting a few 
small denticulations; neck folded; body slender, covered above with small 
granulations, rather larger upon the back than upon the sides; anterior extre- 
mities slender; posterior well developed ; both covered above with granulations, 
rather larger in front than posteriorly; several rows of small plates along the 
margin of the lower jaw; chin and throat covered with small granulations; abdo- 
men covered with smooth hexagonal and quadrangular scales ;¥anterior surface of 
arms and forearms covered with small granulations; of thighs and legs with 
scales similar to those upon the abdomen; femoral pores very distinct ; no anal 
ones ; tail very long and slender posteriorly, covered with smooth quadrangular 
scales near its root, hexagonal posteriorly ; these scales are distinctly verticil- 
late throughout the greater part of the length of the tail, less so anteriorly, and 
carinated both anteriorly and posteriorly, except within about two inches of its 
root; femoral pores very distinct. 
Color. Head of the specimen examined of a light yellow color, with numer- 
ous small brown spots disseminated upon its surface; a dark colored bar upon 
the temples, between the orbit and ear; chin and throat marked with dark 
colored lines and blotches; body ash color above, presenting numerous small 
points upon its surface, and marked with transverse bars of a vermillion color 
during life; upper surface of its extremities resembling in color that of the 
abdomen, the thighs and more especially the legs marked with transverse bands 
of vermillion; abdomen flesh color; tail ash, beautifully banded with trans- 
verse bars of vermillion. 
Dimensions. Length of head 104 lines; greatest breadth 7 lines; length of 
neck and body 23 inches; Jength of tail 64 inches; of arm 5 lines; of anterior 
extremity 1 inch 7 lines; length of foot to extremity of longest toe 13 lines. 
Habitat. Sand hills, at the lower end of the Jornado del Muerte, New 
Mexico. 
Remarks. This animal, of which there are two specimens, a male and a fe- 
male, forming part of Dr. Woodhouse’s collection, differs from the Crotaphytus 
Wislizenii of Baird and Girard, in the size and shape of the head: that of 
Wislizenii being about a quarter of an inch longer; the latter is also broader and 
