CONTENTS 



Officers and committees for 1904- v 



Proceedings .- • vii-xi 



Synopsis of the Genera, Subgenera and Sections of the Family 



"Pyramidellidaj, by William Healey Dall and Paul Bartsch 1-16 



A New Lizard from the Rio Grande Valley, Texas, by Leonhard 



Stejneger 17-20 



A Revision of the North American Mainland Species of ifyiarc/ms, 



by E. W. Nelson 21-50 



A New Batrachian from Sarawak, Borneo, by Thomas Barbour . 51-52 

 Haplomylomys, a New Subgenus of Peromyscus, by Wilfred H. Os- 

 good 53-54 



Thirty New Mice of the Genus Peromyscus from Mexico and Guate- 

 mala, bv Wilfred H. Osgood ' 55-78 



Descriptions of Five New Mammals from Mexico, by E.A.Goldman 79-82 

 The Vegetative Vigor of Hybrids and Mutations, by O. F. Cook . 83-90 



New Plants from Nevada, by Aven Nelson 91-98 



A Decade of New Plant Names, by Aven Nelson 99-100 



General Notes 101-102 



Sonnrdla wnlcottiann—a correction, by Paul Bartsch, 101 ; The 

 species of Geum occurring near Washington, by Gerrit _S. Mil- 

 ler, Jr., 101 ; Spelerpfs porphyrillcus in New Hampshire, by 

 Reginald Heber Howe, Jr., 102 ; Nnnnorchilus, new name for 

 Hermnra, preoccupied, by Robert Ridgway, 102; A preoccu- 

 pied crab name, bv Marv J. Rathbun, 102. 

 De.scriptions of Seven New Rabbits from Mexico, by E. W. Nelson 103-110 



Notes on Tetnme"ns IhiedrlfnUn, by T.D. A. Coi^-^ereW 111-112 



Two New Subspecies of Tropical American Tyrant Birds, by Out- 

 ram Bangs 113-114 



Additions to the Orchid Flora of Florida, by Oakes Ames . . . 115-118 



Three New Orchid Species, by Oakes Ames' 119-120 



Description of a New Species of Blind Eel, of the Genus Anguilla, 



by Hugh M. Smith 121-122 



Four New Grasshopper Mice, Genus Onychoviys, by C. Hart Mer- 



riam " 123-126 



Two New Pocket Mice of the Genus Perognathus, by Wilfred H. 



Osgood 127-128 



Two New Squirrels of the Aberti Group, by C. Hart Merriam . 129-130 

 Jack Rabbits of the Lepvs cnmpestns Group, by C. Hart Merriam . 131-134 

 Unrecognized Jack Rabljits of the Lfpus texkinus Group, by C. Hart 



Merriam ■ 135-138 



New and Little Known Kangaroo Rats of the Genus Perodipus, 



byC. Hart Merriam 139-146 



Descriptions of New Squirrels from Mexico, by E. W. Nelson . 147-150 

 Descriptions of Four New Birds from Mexico, by E. W. Nelson . . 151-152 

 Four New Bears from North America, by C. Hart Merriam . 153-156 



A New Coyote from Soutliern Mexico, by C. Hart Merriam . . . 157-158 

 A New Sea Otter from Southern California, by C. Hart Merriam . 159-160 



(iii) 



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