SYSTEMATIC ACCOUNT OF THE SPECIES. 261 
Type-locality:—Sierra de San Juan de los Perros, Province of Camagiiey, Cuba. 
Type:— M. C. Z. 12,304 and four Paratypss M. C. Z. 13,438-13,441. 
Distribution:— Hill regions of Central Cuba. 
Diagnosis:— Large, sexually dichromatic, with large tectiform dorsals, about 
six in distance from tip of snout to centre of eye, and having a middorsal granular 
zone; the greatly enlarged dorsals beginning on the scapular region, not forward 
on the neck as in anthracinus. Neck and shoulder-region covered with small 
granules. 
Description:— Adult M. C. Z. 12,304. Cuba: Camaguey; Sierra de San 
Juan de los Perros. Thomas Barbour. 
Snout pointed and elongate, the distance from the tip to the eye being dis- 
tinetly longer than that from the eye to the ear-opening; rostral moderate with 
a long median cleft behind; nostril between rostral, first supralabial, a large 
supranasal and two small postnasals; supranasal separated from its fellow on the 
opposite side by a single roughly hexagonal scale about two thirds the size of one 
of the supranasals, the three bordering the rostral above; four large and two 
small supralabials to below the centre of the eye; a spine on the superciliary 
margin over the centre of the eye; head above and on sides with extremely 
minute granular scales; scales of the snout distinctly enlarged and pavement- 
like dorsals at first very small and granular on the nuchal and scapular regions 
then passing into the very large, heavily keeled scales of the back of which about 
six equal the distance from the tip of snout to centre of eye; the change from the 
cephalic granules to the large dorsal scales is very gradual; it is very abrupt in 
anthracinus and somewhat less so in copei; a very narrow median zone of very 
small scales, most conspicuous on the nape and shoulder-region; mental large, 
larger than rostral; two very large infralabials and two very small ones to below 
the centre of the eye; two small, slightly elongate chin-shields behind the mental, 
followed by small flat chest and throat rounded, imbricate, smooth, rather large, 
not however, as large as the dorsals; scales of limbs much smaller, imbricate, 
smooth or feebly keeled; scales of tail small, rounded, slightly elongate, imbricate, 
smooth, a rather inconspicuously enlarged series on the lower median surface of 
the tail. 
Colour (in fresh specimen) :— Uniform iron-gray above, pale below, in the 
male; and in the female the ground-colour is bluish or stone-gray crossed on the 
nape, shoulders, and body by pairs of black bands; between these pairs of bands 
there are also cross-series of dark dots. In the young the pairs of bands are 
broad and conspicuous but the intermediate series of dots are absent. 
