Vol. I] VAN DENBURGH—SNAKES OF THE GALAPAGOS ISLANDS 345 



All the specimens are striped. The stripes are clear and 

 distinct except in Nos. 12093, 12094 and 12154, in which they 

 are more or less obsolete behind the neck. They are continued 

 to the parietals, and usually involve the scales of three rows. 



Jervis Island. — Two specimens from Jervis seem to agree 

 perfectly in squamation and coloring with the James Island 

 snakes. 



TABLE OF SCALE COUNTS, Dromicus dorsalis (Steindachner) 

 JERVIS ISLAND 



Barrington Island. — I have before me fifteen snakes from 

 Barrington. All but four of these have a few urosteges un- 

 divided. The variation in important scale-characters is set 

 forth below. The tendency toward a reduction in the number 

 of temporals and postoculars will be noted. 



TABLE OF SCALE COUNTS, Dromicus dorsalis (Steindachner) 

 BARRINGTON ISLAND 



