THE REPTILES OF THE GALAPAGOS ISLANDS. 87 



teriorly the spots do not appear and the coh)r is more uni- 

 form white or yellowish. The edges ofthe scales are darker. 

 The greater part of the brown in the coh)ration is in the 

 shape of coarse puncticuhitions ; these are continued more 

 or less completely across the abdomen on the hinder edges 

 of the scutes. On its edges the dorsal band has the ap- 

 pearance of being serrated. Dr. Giinther found 209 ven- 

 tral scutes on the type specimen. Steindachner found the 

 ventrals on his examples to vary from 219 to, 225 and 

 the subcaudals from 105 to 114. On O. Ohamissonis t\iQ 

 ventrals vary from 175 to 201 and the subcaudals from 

 100 to 113. 



Mus. Comp. Zool., Jan., 1892, 

 Cambridge, Mass. 



