Vol. I] VAN DEN BURGH— SNAKES OF THE GALAPAGOS ISLANDS 



343 



TABLE OF SCALE COUNTS, Dromicus dorsalis (Steindachner) 

 INDEFATIGABLE ISLAND 



The largest snake in the collection is No. 10792 which 

 measures 950 mm. from snout to anus. 



All but six of the Indefatigable snakes are colored like the 

 one described above. Seventy-four per cent of the specimens 

 from this island are striped. Of the remaining six specimens, 

 two (Nos. 10233 and 12064) are spotted to the tail, while the 

 other four (Nos. 10235, 10305, 10379, and 10792) are spotted 

 anteriorly, but become nearly unicolor, or at most show only 

 faint spots and bands posteriorly. Nos. 10233, 12064, 10235, 

 and 10305 show longitudinal light stripes more or less clearly 

 on the posterior part of the body. These stripes are wanting 

 in Nos. 10379 and 10792. 



The light stripes or nuchal blotches are continued forward 

 very distinctly to the parietals in all Indefatigable specimens 

 except 10235, 10305, 10379, 10396, and 10792. The light 

 stripes, when present, never are confined to the scales of two 

 rows, as is the case in snakes from Barrington. 



South Seymour Island. — Two of the three specimens at 

 hand have more numerous gastrosteges than have been found 



