296 BARBOUR: ZOOGEOGRAPHY. 



correctly, that these may have been shipped from Haiti, but collected elsewhere. 

 There is no other Haitian record for the species. There is also a specimen in the 

 U. S. national museum labeled "Nassau, New Providence"; but Stejneger has 

 already noted that this was, of course, impossible, and that some mistake had 

 occurred in the labeling. 



Norops ophiolepis (Cope). 

 Cope, Proc. Acad. nat. sci. Phila., 1861, p. 211. Boulenger, Cat. lizards Brit, mus., 1885, 2, p. 26. 



A not uncommon species, confined to Cuba. Several other species occur 

 on the mainland of tropical America, but this is the only Antillean member of 

 the genus. Its presence in Cuba serves to emphasize the fact that this island is 

 far more intimately related to the mainland than any of the others. 



My observations agree with those of Gundlach that this species is never 

 arboreal, but is found only among grass or rushes, its non-climbing habits being 

 correlated with the absence of subdigital lamellae. At Soledad, near Cienfuegos, 

 this species was quite abundant in the tall grass of pasture land. It was difficult 

 to catch owing to its habit of dropping to the ground and hiding quickly. It was 

 also seen about Pinar del Rio, Madruga, and near Havana, where Mr. Samuel H. 

 Scudder procured the only specimen the Museum had prior to our visits. 



Iguana rhinolopha Wiegmann. 



Wiegmann, Herpet. Mexicana, 1834, p. 44. Gray, Cat. lizards Brit, mus., 1845, p. 186. Boulenger, 

 Cat. lizards Brit, mus., 1885, 2, p. 190. 



Iguanas were recorded from Grenada by Garman (Bull. Essex inst., 1887, 

 19, p. 50) as being intermediate between this species and /. tuberculata (Laurenti). 

 A careful revision of these two species, made with the aid of extensive collections 

 from many localities, will be necessary before their exact status can be settled. 

 That they are really distinct I have no doubt whatever, but as yet their ranges 

 can not be accurately defined. Stejneger suspects that if intermediates really 

 do exist, they may be explained by the fact that the species have been carried 

 about by human agency "in innumerable instances," and that the intermediates 

 may be "hybrids from introduced stock, or because of their geographic distribu- 

 tion" (ex litt.). I favor the latter explanation, as apparently the accidental 

 introduction of vertebrates by human agency is a far rarer phenomenon than is 

 often realized. 



Boulenger gives the distribution of what he calls Iguana tuberculata var. 

 rhinolopha as Central America and West Indies. It was formerly widespread 



