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 theii' 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 carinnlui, p. 169 



a' Caudal crest not higher than dorsal. 



b' An area of minute granules behind ear opening iniicropus, p. 173 



b^ No area of minute granules behind ear opening. 



c' Side of neck entirely covered with i^ointed, imbricate, kee'led scales. 



about 12 dor.sal scales equal length of head '. . . cubensia, p. 171 



c- About 20 dorsal scales equal length of head po.sterior praefrontals 



greatly enlarged raviceps, p. 172 



45. Leiocephalus carinatxjs Gray. 



Plate 14, fig. 11. 



Perico, Caguayo; Iguana de las 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 bj' 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 scales; 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 

 scales, large, broader than long, sHghtly mucronate, serrate on their free edges, 

 very strongly keeled, the keels forming continuous and slightly oblique lines; 

 lateral scales sUghtly smaller than dorsals, imbricate, keeled, the keels much 

 more sharply obhque; ventrals very sUghtly smaller than dorsals, smooth, 

 rounded, distinctly broader than long; the adpressed hind limb reaches to the 



