THE REPTILES OF THE GALAPAGOS ISLANDS. 81 



and filially subconical. On the dorsum the crest is first 

 indicated by convex scales that become compressed and 

 ultimately subconical or i)ointed. In this genus the crest 

 on the neck shows the appearance of the rattles more than 

 that on the back, the opposite of what occurs on Conolo- 

 phus. 



While looking over the specimens belonging to the 

 Museum of Comparative Zoology with Count Pourtales, 

 he mentioned a statement of Darwin to the effect that this 

 species does not take to the water for safety, but that 

 when Darwin had thrown them in they immediately re- 

 turned to the shore. The Count said that, from his own 

 observations, among large rocks where there were fishes 

 the lizards preferred to hide in crevices on shore ; but that 

 he saw them along the open places, where there were num- 

 bers of them, run into the sea, near the beach where the 

 water was shallow, and secrete themselves under the rocks 

 when pursued from the land. 



Phyllodactylus tuberculosus Wieg. 



This identification may yet be questioned. The speci- 

 men in the collection, from Chatham, is badly mutilated. 

 It agrees with Wiegmann's species in the distribution of 

 the tubercles but differs in their shape and size ; they are 

 broader and flatter with the keel more distinct from the 

 rest of the upper surface. 



Phyllodactylus galapagoensis Pet. 



Dr. Boulenger gives the locality of this species as Charles 

 Island. Dr. Baur's specimens are all reported from Albe- 

 marle, where it would from his collections appear to be 

 the only species of the genus. The largest individual 

 measures three and three-quarters inches, indicating a 

 smaller species than P. tuberculosus, of which specimens 



ESSEX INST. BULLETIN, VOL. XXIV 11 



