278 BARBOUR: ZOOGEOGRAPHY. 



carries no weight. Dumeril and Bibron's descriptions, while often verbose, 

 generally omit mention of the characters which are now known to be most 

 diagnostic in Anoles. The types of this species from near Kingston, St. Vincent, 

 are M. C. Z., No. 6,184. 



Anolis vincentii Gakman. 

 Garman, Bull. Essex inst., 1887, 19, p. 46. 



This lizard has by Boulenger been called a variety of "Anolis alligator" (Proc. 

 Zool. soc. London, 1891, p. 255); and if it existed on the mainland where the 

 ranges of the forms might overlap such an expression would fit the conditions. 

 But insular faunae remain perfectly isolated; and as no transition zones exist 

 about them, the groups of individuals differentiated upon each island must be 

 considered as species, unless they are absolutely identical with those on another 

 island. The types of this species are M. C. Z., No. 6,178-6,179, and came from 

 St. Vincent. 



Anolis luciae Garman. 

 Garman, Bull. Essex inst., 1887, 19, p. 44. 



This species is perfectly distinct, and has been adequately described by 

 Garman. There is no occasion to combine it with A . extremus Garman, or with 

 what Boulenger has called A. alligator in remarking that these, with A. gentilis 

 Garman and A. cinereus Garman, were all one species. The peculiar character 

 of the dorsal lepidosis, noted by Garman, serves at once to separate this species 

 from the others. It is known from the island of St. Lucia, whence Garman 

 collected the types (M. C. Z., No. 6,173). 



Anolis extremus Garman. 

 Garman, Bull. Essex inst., 1887, 19, p. 35. 



I can not agree with Boulenger (Zool. rec. Rept. for 1887) in considering 

 this species a synonym of what he calls Anolis alligator Dumeril & Bibron. Nor 

 can I agree with Garman in considering it a variety of A . cepedii Merrem, which 

 is the name he prefers for A. alligator. A comparison of the types (M. C. Z., 

 No. 6,183) with Garman's original description and with the other species leads 

 me to the conclusion that the description is perfectly accurate, and shows well 

 how different this species is from its relatives. This form is found upon Bar- 

 bados. 



