F>ROCEEDINQS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. II, Pt. I, pp. 133-202, pis. 8-11 September 19, 1913 



EXPEDITION OF THE CALIFORNIA ACADEMY 



OF SCIENCES TO THE GALAPAGOS 



ISLANDS, 1905-1906 



IX 



THE GALAPAGOAN LIZARDS OF THE GENUS TROPIDURUS; 



WITH MOTES ON THE IGUANAS OF THE GENERA 



CONOLOPHUS AND AMBLYRHYNCHUS 



BY JOHN VAN DENBUEGH 



Curator of the Department of Herpetology 



AND JOSEPH R. SLEVIN 



Assistant Curator of the Department of Herpetology 

 CONTENTS 



PAGE 



Introduction : 



Prefatory Remarks 134 



Previous Collections and Studies ..... 135 



List of Names Proposed . . . . . . .137 



Relations and List of Kinds Recognized .... 138 



Origin and Distribution of Galapagos Tropiduri . . . 139 



Origin and History of Galapagos Islands .... 140 



Systematic Account: 



Key to the Species 142 



Tropidurus paciUcus 143 



Tropidurus duncanensis ....... 147 



Tropidurus habelii . 150 



Tropidurus bivittatus ....... 155 



Tropidurus delanonis ....... 159 



Tropidurus grayii . . . . . . . . 164 



Tropidurus albemarlensis barringtonensis .... 168 



Tropidurus albemarlensis . . . . . . .172 



Conolophus subcristatus ....... 188 



Conolophus pallidus 190 



Amblyrhynchus cristatus 192 



September t7, 1913 



NOVtl Wh 



