GENERAL DESCRIPTION OF THE TRES MARIAS ISLANDS. 



13 



PLANTS DESCRIBED FROM THK THES MARIAS. 



Gilihertia insitlaris Rose ep. nov. 

 Pilocarpnyi insnlarix Rose sp. nov. 

 Teruostrotmia nialtbya Rose sp. nov. (also 



on mainlami). 

 Zunthoxyliim insularis Rose sp. nov. 

 ZanthoxyJum nelaoni Rose sp. nov. 



^giphila pacifica Greenman. 



Btlopirone nelaoni Greenman. 



Buxiis pubescens Greenman. 



Cordia insahiris Greenman. 



Mrythrina lanata Rose sp. nov. (also on 



mainland). 

 Euphorhia nelsoni Millspaugh. 

 Exiphorhia aubcariilea tresmariw Millap. 



var. nov. 



SUMMARY. 



The following .statement show.s the number of species of animals and 

 l^lants now known from the Tres Marias : 



Lan<l mammals H 



Birds 83 



Reptiles 18 



Fresh-water fisli 2 



Fresh- water shrimp 1 



Land mollusks 6 



Plants 136 



ACKNOWLEDGMENTS. 



m 



Much of the value of this report is due to the cordial cooperation of 

 several eminent specialists. Through the courtesy of Mr. F. V. Coville, 

 curator of the ISfational Herbarium, Dr. J. N. Rose, assistant curator, 

 was enabled to prepare the report on the plants. Dr. Leonhard Stej- 

 neger, curator of the division of reptiles of the National Museum, 

 Dr. William H. Dall, honorary curator of the division of conchology, 

 and Miss Mary J. Rathbun, assistaist in the division of invertebrates, 

 reported on the Tres Marias material; and Prof. B. W. Evermann, 

 ichthyologist of the United States Fish Commission, kindly identified 

 the collection of fishes from the islands and the adjacent mainland. 

 Finally, I wish to express my great indebtedness to Mr. Robert Ridg- 

 way, curator, and Dr. Charles W. Richmond, assistant curator, of the 

 division of birds in the National Museum, for having .so freely placed 

 at my disposal, not only the material in their charge but also their 

 knowledge of tropical American birds. 



