CONTENTS. 



PAGE. 



Eeport cm Birds. By A. K. Fisher, M. D 7-158 



Keport on Eeptiles and Batrachlans. By Leonbard Stejneger 159-228 



Eeport on Fishes. By Charles H. Gilbert, Ph. D 229-234 



Eeport on Insects. By C . V. Eiley, Ph. D., S. W. Williston, P. E. Uhler, and 



Lawrence Bruner 235-268 



Eeport on Mollnsks. By E. E. C. Stearns, Ph. D 269-283 



Eeport on Desert Trees and Shrubs. By C. Hart Merriam, M. D 285-343 



Eeport on Desert Cactuses and Yuccas. By C. Hart Merriam, M. D 345-359 



List of Localities. By T. S. Palmer 361-384 



ILLUSTRATIONS. 



Frontispiece: Mohave Desert, California, showing tree yuccas. 

 Plate I. 1, Sceloporus clarlcii; 2, S. magister; 3, S. zosteromus; 4, S. oreutti: 5, S. 

 boulengeri; 6, S. floridanus. 

 II. 1, Phrynosoma comutum; 2, P. blainvillii; 3, P. goodei; 4, P. platyrhinos. 



III. 1, Xantusiavigilis; 2, Salvador a hexalepis; 3, Bufo halophilus; 4, B. boreas 



nelsoni, subsp. nov.; 5, Bana fisher i, sp. nov. 



IV. Sauromalus ater. 



V. JEmpetrichthys merriami gen. et. sp. nov. 

 VI. 1, Rhiniohthys nevadensis sp. nov. j 2, R. velifer sp. nov. 

 VII. Opuntia aeanthocarpa. 

 VIII. Opuntia aeanthocarpa. 

 IX. Opuntia ivhipplei. 

 X. Opuntia parryi. 

 XL Opuntia rutila. 

 XII. Yucca baccata. 



XIII. Yucca arborescens. 



XIV. Yucca maerocarpa. 



FIGURES IN TEXT. 



Fig. 1. Amnicola micrococcus, page 277. 

 2. Fluminicola merriami, page 282. 



MAPS. 



Map 1. General route map of the expedition. 



2. Lower division of the Lower Sonoran zone. 



3. Distribution of LeConte's thrasher (Harporhynchus lecontei). 



4. Distribution of the creosote bush {Larrea trident ata). 



5. Distribution of the tree yucca {Yucca arborescens). 



