HERPETOLOGY OF PORTO RICO, 565 



The numl)er of jspeeies occurring in St. Thomas and St. John l>ut 

 not in Porto Rico proper are very few, as shown in the following: 



Lifit ofupccien ocevrrliH/ in St. Tlioiii<t>i ('<) avd St. John tint not in J'ortu JHco proper. 



5. ^1 utph i.'ihaiia feneatrata. 



6. Li'itnadoplii-'t e.rigun.^. 



7. AJi^ojiJiis antilU'ii.^i.^. 



1. EleuthfrodaciijJiix Ifntn.^. 



2. EleutJurodactj/hi.s antillensi.'i. 

 o. Sphnrodarti/hi.'^ m<(crolepis. 

 4. lynana i(/uaii((. 



It will be seen in every case but one that these represent species living 

 in Porto Kico, and, moreover, that three of them extend so far west 

 as to include Vieques and Culebra, namely, Ele^itlurodnvtylm antil- 

 /eii.sf'.s, LehiKidopliis exiguvx, and Alsoj/Iu'.s ((nfUJeiisis. The only spe- 

 cies which is not represented at all in Porto Rico is Iguana iguana^ 

 and it is altogether probable that this species has ))een introduced 

 originally by man. 



As an olfs<^t to the three peculiar Virgin Island species mentioned 

 above, which extend as far west as Vieques, we may mention for the 

 sake of completeness a Porto Rican species which reaches Tortola, but 

 which has not been recorded from St. Thomas or St. John, namely, 

 Anolis cuvleri. 



It is then plain that the sixteen species of reptiles and batrachians 

 found in St. Thomas and St. John ^ form only a herpetological appen- 

 dix to Porto Rico. 



VERTICAL DISTRIBUTION. 



With regard to the vertical distribution of the batrachians and rep- 

 tiles in Porto Rico it must ])e l)orne in mind that the island, although 

 very mountainous, does not rise to such great altitudes as the other 

 Greater Antilles. The El Yunque Mountain, which has been consid- 

 ered the highest point in Porto Rico, has lately lieen determined to be 



f'Only such species are included the occurrence of which is corrol)orate<l by 

 repeated finds, and consequently undoulited. 



^1. Leptodactyhis albilabris. 



2. Eleutherodactylus antillensis. 



3. Eh'utlierodadylus lentus. 



4. Thecadactylvs rapicauda. 



5. Hemidactyliis matxjuia. 



6. Sphierodadylui^ macrolepis. 



7. Mabuya sluanii. 



8. Ameiva e.cul. 



H. Anolis cristatelht.t. 



10. ^[)iol'is stratulus. 



11. A nolis pidcheUus. 



12. lynana iguana. 



1 3. .1 nipJiisbuvHi fenestrata. 



14. Typhlops lumbricalis. 



15. LeimadopMs exiguus. 



16. Alsophis antillenm. 



A number of species credited to St. Thomas on the strength of uncorroborated 

 museum labels is here left out. It is not unusual that museum specimens are cred- 

 ited to the place from which they were shii:)ped, which may have been another than 

 the one in whiih they were collected. On the other hand, single specimens acci- 

 dentally introduced from near-l)y islands may well be expected in a place like St. 

 Thomas. 



