NATURAL AREAS AND REGIONS 



705 



tributaries of the Rio Blanco (White 

 River), viz, Rio Hicaco, Rio Camuy, 

 Rio Prieto and Rio Sabana. These 

 streams which drain the greater portion 

 of the south slope of the Luquillo Range 

 fall some 2000 ft. in a horizontal dis- 

 tance of about two mi., and form the Rio 

 Blanco by their confluence just above 

 the Preston Ranch which is situated 

 about 5 mi. from Naguabo and from 

 which it is accessible by automobile. 



Some 30 mi. of bridle trail have re- 

 cently been built through and about the 

 Forest, the one fron) Hacienda Catalina 

 to the peak of El Yunque being surfaced 

 by loose broken stone and laid out on a 

 very easy grade. 



Supervisor's headquarters at Rio 

 Piedrasl. Forest may be reached by 

 auto from San Juan to Mameyes Hac- 

 ienda Santa Catalina (one hr.) thence 

 afoot by trail to summit of the peaks. 

 A public shelter just below El Yunque; 

 nearest hotel at Rio Grande.— £^. M. 

 Bruner. 



REFERENCES (n. L. B.) 



Bello y Espinosa, Domingo. Apuntes 

 para la Flora de Puerto-Rico. Ann. 

 Soc. Espanola Hist. Nat., Vol. 10, 

 pp. 231-304 (1881); Vol. 12, pp. 103- 

 130 (1883). 



Britton, N. L. The Vegetation of Mona 

 Island. Mem. Missouri Bot. Gard., 

 , Vol. 2, pp. 33-55, pi. 1 (1915). 



Britton, N. L. and Wilson, Percy. Bot- 

 any of Porto Rico and the Virgin 

 Islands.— Spermatophyta, Sci. Sur 

 Porto Rico and Virg. Ids., Vol. 5; 

 Vol. 6, parts 1 and 2 (1923-1925) New 

 York Academy of Sciences. 



Cook, O. F. and Collins, G. N. Eco- 

 nomic Plants of Porto Rico. Contr. 

 U. S. Nat. Herb., Vol. 8, pp. 57-269, 

 plates 13-55, 1903. 



Howe, Marshall A. Report on a visit to 

 Porto Rico for collecting Marine 

 Algae. Bull. N. Y. Bot. Gard., Vol. 

 16, pp. 219-225 (1915). 



Stahl, Agustin. Estudios sobre la Flora 

 de Puerto-Rico. Published in six 

 parts, 1883-1888. 



Stevenson, John A. A Check List of 

 Porto Rican Fungi and a Host Index. 

 Journ. Dep. Agric. Porto Rico, Vol. 

 2, pp. 125-264 (1918). 



Urban, Ign. Flora Portoricensis. Sym- 

 bolae Antillanae, Vol. 4, pp. 771, 

 1903-1911. 



Wilson, Percy. The Vegetation of 

 Vieques Island. Bull. N. Y Bot 

 Gard., Vol. 8, pp. 379-410 (1917). 



REFERENCES (g. N. W.) 



Allen, G. M. Mammals of the West 

 Indies. Bull. Museum Comp. Zool., 

 Vol. 54, July, 1911, pp. 175-263. 



Anthony, H. E. Indigenous Land Mam- 

 mals of Porto Rico, Living and 

 Extinct. Memoirs, American Mu- 

 seum of Natural History, N. S.. Vol 

 2, pt. 2. 



Gundlach, Juan. Fauna Puerto- 

 Riquena. In Ann. Soc. Espanola 

 Hist. Nat. (Vol. 16-22, May, 1887- 

 January, 1894. Insects.) Madrid. 



Investigation of the Aquatic Resource 

 Fisheries of Porto Rico. On the 

 U. S. Fish Commission Steamer Fish 

 Hawk in 1899. Bull. U. S. Fish 

 Commission, Vol. 20, pt. 102, 1900 

 (lfi02), pp. 1416. 



Murphy, Louis S. Forests of Porto 

 Rico, Past, Present and Future. 

 U. S. Dept. Agr. Bull. No. 354, 

 October 20, 1916. 



Schmidt, K. P. Contributions to the 

 Herpetology of Porto Rico. Annals 

 of the New York Academy of 

 Sciences, Vol. 28, pp. 167-200, 

 September 8, 1920. 



Stejneger, Leonhard. Herpetologv of 

 Porto Rico. Report U. S. National 

 Museum, 1902, pp. 549-724. (No. 

 129, 1904.) 



Wetmore, Alex. Birds of Porto Rico 

 U. S. Dept. Agr. Bull. No. 326. 



Wolcott, G. N. Insectae Portoricensis. 

 Jour. Dept. Agr. P. R., Vol. 7, No. 1, 

 January, 1923 (to be issued about 

 February, 1924.) Insular Experi- 

 ment Station, Rio Piedras, P. R. 



IV. Virgin Islands (N. L. B.) 



ST. CROIX (S.\NTA CRTJZ) 



Lying isolated in the sea about 40 

 mi. south of the Virgin Passage, with one 

 contiguous islet, St. Croix is visible 

 in clear weather from the hills of Porto 

 Rico and St. Thomas. There is a range 

 of hills and low mountains of stratified 

 and eruptive cretaceous rocks along its 

 highly picturesque north-western coast, 

 and a few hundred acres of forest exist 

 here at higher elevations; otherwise this 

 island has been deforested; these hills 

 cause a moderate rainfall in the central 

 and western districts; they should be 



