INTRODUCED SPECIES. 221 



Hyla rubra Daudin. 

 Daudin, Hist. nat. rain., 1803, p. 26, pi. 9. Boulenger, Cat. Batr. Sal. Brit, mus., 1882, p. 403. 



Tlois mainland species has been recorded from St. Lucia by Boulenger 

 (Proc. Zool. see. London, 1891, p. 354). It is probable that its introduction 

 may have been accidental. Hylas are frequently carried about in shipments 

 of living plants, and this case may easily be parallel to the finding of Hyla infra- 

 frenata, a Papuan species, in the Botanical gardens at Buitenzorg, Java. 



Hyla squirilla Bosc. 

 Daudin, Hist. nat. rain., 1803, p. 18, pi. 3, fig. 2. Boulenger, Cat. Batr. Sal. Brit, mus., 1882, p. 398. 



The specimens from Stranger's Cay upon which the Bahaman record for 

 this species rests have been reexamined; and while they are not especially well 

 preserved, there can be no doubt that they belong to this species. They do not 

 show the markings so characteristic of the closely related H. femoralis, and the 

 absence of web between the fingers precludes their inclusion in H. carolinensis. 

 There can be no doubt regarding their artificial introduction, as was suggested 

 when first the specimens were recorded (Barbour, Bull. M. C. Z., 1904, 46, p. 56). 



Constrictor constrictor Linne. 

 LiNNfi, Syst. nat., ed. 10, 1758, 1, p. 215. Boulenger, Cat. snakes Brit, mus., 1893, 1, p. 117. 



This mainland species occasionally reaches the southern Lesser Antilles, 

 carried over on masses of flotsam and jetsam from the mouths of the large rivers 

 of the mainland. Wallace (Island life. New York, 1881, p. 71) has said that 

 "A large boa-constrictor was once floated to the island of St. Vincent twisted 

 round the trunk of a cedar- tree, and was so little injured by its voyage that it 

 captured some sheep before it was killed. The island is nearly two hundred 

 miles from Trinidad and the coast of South America, whence it almost certainly 

 came." 



Such individuals have undoubtedly come to the islands once in a while 

 since time immemorial, and yet never anywhere in the area has the species be- 

 come established. Nor has any other species been proved to have been intro- 

 duced and estabUshed by similar means. 



For the use of the generic name Constrictor instead of Boa, consult Stejneger, 

 Proc. U. S. nat. mus., 1902, 24, p. 185. 



