INTRODUCED SPECIES. 223 



gavial-like, which distinguishes Crocodilus intermedins from any other species 

 on this continent. Boulenger (loc. cit.) says of this species that the largest known 

 specimen measures nearly four metres. Mr. Smith, who measured the Grenada 

 example, reported it as being 14 feet in length. It evidently came from the 

 Orinoco, whence only this species could have come; arid was probably carried 

 by the strong westerly drift to the island. The most interesting and important 

 observation to be drawn from this fortuitous occurrence is the fact that so strong 

 and resistant a creature, aquatic at that, should not have been able to survive 

 what would appear to have been a rather easy journey. No storm of special 

 violence was noted, and crocodiles do not need to feed very frequently ; yet this 

 individual lived but a short time. This is one of the best actual observations 

 bearing on dispersal by "flotsam and jetsam" that has been recorded by compe- 

 tent witnesses. 



Col. Fielden, in the Zoologist (1888, p. 236; 1889, p. 298) records "the 

 interesting fact of an alligator being transported alive on the trunk of a tree from 

 the continent of South America to Barbados in 1886." There is no suggestion 

 as to what species may have been represented. 



Testudo denticulata Linne. 



Garman remarks that this tortoise "feeds readily in captivity, and is kept 

 about the houses and carried from place to place much as the more common do- 

 mestic animals." There are examples in the Museum from St. Lucia, St. Vin- 

 cent, and a very large mounted example said to be from Porto Rico. It has also 

 been reported from Cuba, upon several occasions. It is, of course, confined to 

 South America in a wild state. 



The three following Cuban records cannot be eliminated from the list with 

 the same certainty that the foregoing West Indian records can. 



Phyllobates bicolor Bibron. 



Bibron, Sagra's Hist. Cuba. Rept., 1S40, pi. 29, bis. Boulenger, Cat. Batr. Sal. Brit, mus., 1882, p. 

 195. 



Gundlach, during his long residence in Cuba, never found this species. 

 No specimen is to be seen in any of the local museums of Havana. Dr. Carlos 

 de la Torre, a most enthusiastic and indefatigable collector and accurate observer, 

 told me that he had never in his life-long collecting in Cuba been able to find an 

 example. Since among the other collections sent to France by Ramon de la 

 Sagra there were many examples which are now known never to have come from 



