SYSTEMATIC ACCOUNT OF THE SPECIES. 169 
from the blood-filled stomachs of persons during the last stage of fatal cases of 
yellow fever. The fact that the Iguanas are growing rare and difficult to obtain 
coupled with their repulsive appearance may have also contributed to this change 
of custom. It is strange, however, that so great a change can have taken place 
in popular opinion in hardly more than a generation. 
Key to the Species of Leiocephalus. 
a! Caudal crest higher than dorsal ; ¢caley Atrac.} bent, 4 2) 4 carinalus, p. 169 
a* Caudal crest not higher than dorsal, eb. x 
b! An area of minute granules behind e: ar opening; a ffacle @4yruldey |atet macropus, p. 173 
b? No area of minute granules behind ear opening. 
c' Side of neck entirely covered with pointed, imbricate, keeled scales. 
about 12 dorsal scales equal length of he: ad - 3 4, 
ce? About 20 dorsal scales equal length of head, -posterior pr: oto uls 
greatly enlarged ; 2 prebrailado.,, thi.Aceoval alerngeln. . . - raviceps, p. 172 
cubensis, p. 171 
45. LEIOCEPHALUS CARINATUS Gray. 
Plate 14, fig. 11. 
Perico, Caguayo; Iguana de los Fosos; Iguana, Iguana rabienroscada; 
Bayoya de rabo enroscado. 
Diagnosis: — A large spiny lizard carrying its tail curled over its back, 
always when moving and often while at rest. It may be distinguished at once 
from the other Cuban species by its barred gray and brown colouration and 
by having the caudal crest better developed than the dorsal. 
Description: — Adult M. C. Z. 7,940. Cuba: Morro Castle, Havana, 
February, 1910. Thomas Barbour. 
Upper head-scales, rather large, smooth: nasal in contact with the rostral; 
supraorbitals extensively in contact; six narrow strap-like supraoculars, separ- 
ated from the supraorbitals by a single series of rather small seales; two pairs 
of parietals, the outer pair more than twice as broad as the inner ; sides of neck 
each with two sharply defined, converging folds; scales of sides of neck, pointed, 
imbricate and sharply keeled; dorsal crest evident but feebly developed; dorsal 
seales, large, broader than long, slightly mucronate, serrate on their free edges, 
very strongly keeled, the keels forming continuous and slightly oblique lines; 
lateral scales slightly smaller than dorsals, imbricate, keeled, the keels much 
more sharply oblique; ventrals very slightly smaller than dorsals, smooth, 
rounded, distinctly broader than long; the adpressed hind limb reaches to the 
