226 BARBOUR: ZOOGEOGRAPHY. 



The genus Chamaeleolis, with its single species, is autocthonous in Cuba, 

 and the reason for its origin is not clear. Its nearest ally certainly seems to be 

 Anolis equestris (Merrem) but it can hardly be derived from this species. The 

 only West Indian species of Norops, found commonly on the island, again em- 

 phasizes the intimacy of its Central American relationship. Still more does 

 the occurrence of Cricosaura typica Gundlach & Peters. This rare creature, 

 so far as known, is entirely confined to the small region about Cabo Cruz, and 

 this closely circumscribed region has conditions very similar to those obtaining 

 where the genus Xanthusia occurs. A Natrix has been recorded from this 

 island alone of all the region; but the correctness of the locality of the typical 

 specimen is open to grave doubt, and it is possible — perhaps even certain — 

 that it does not occur. Tretanorhinus has already been considered. Arrhyton 

 is a curious autocthonous genus of which so few specimens are known that it is 

 impossible to state whether the individuals that have served for the types of 

 the three species recognized in Boulenger's Catalogue are really anything more 

 than the widely varying individuals of a single species. The genus has probably 

 been derived from some form similar to Contia, or some of its allies, from Central 

 America. Urotheca dumerilii Bibron is supposed to come from Cuba; but no 

 specimens have been taken there, so far as I can learn, since the discovery of the 

 species; and it is probable that this species is Central American, as are all the 

 others of the genus. The Cuban specimen in this Museum was sent by the Paris 

 museum, and probably represents one of the original series. Crocodilus rhom- 

 bifer Cuvier has its ally in Central America, where the species Crocodilus more- 

 letii A. Dumeril is so closely similar as to be almost indistinguishable. All the 

 other Cuban . species of reptiles and amphibians belong to genera which are 

 found on other islands as well, though their distribution through the group varies. 

 Hyla occurs in the Bahamas, in Cuba, Haiti, and Jamaica, and the Caymans; of 

 Bufo, there are four species in Cuba, one in Haiti, and one in Porto Rico. Of 

 these, Bufo empusus (Cope) represents the type which has extended most widely, 

 being represented in Haiti by Bufo gutterosus Latreille, and in Porto Rico by Bufo 

 lemur Cope. The Cuban species Bufo longinasus Stejneger, known from the type 

 alone, is a form whose relationship cannot be made out from the material so far 

 collected. Its only ally is Bufo ramsdeni described later in this paper. Bufo 

 peltacephalus Tschudi is obviously of Central American origin. 



Five species of Eleutherodactylus known for some time embrace three 

 peculiar to the island, and two occurring elsewhere, — one, E. recordii Dumeril & 

 Bibron, occurring also in the Bahamas, and E. auriculatus (Cope) in Haiti and 



