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



353 



and succeeding bars, outline alternating dark spots on the 

 lower lateral scales. 



The largest specimen of D. slevini is that from Cowley Mt., 

 Albemarle Island, which measures 347 mm. from snout to 

 anus, and 135 mm. from anus to tip of tail. 



Habits. — The Duncan Island snake contains the foot and 

 tail of a gecko which it had eaten. 



General Remarks. — The Cowley Mountain snake was taken 

 August 11, 1906, on a field of pumice stone at an elevation of 

 about 200 feet. Mr. Slevin's notes state that it was the only 

 snake secured on Albemarle, and differed in coloration from 

 any taken elsewhere. 



Under date of August 14, 1906, Mr. Slevin wrote : "Anch- 

 ored off Duncan about ten a. m. I collected on the northeast 

 slope of the island to about 800 feet. Got a snake at about 

 400 feet. It appeared different from any taken thus far. It 

 was very well colored to prevent detection. It was secured 

 on a lava block covered with silver colored lichen which 

 matched the snake exactly. One was reported by Mr. Hunter 

 during our last stop at Duncan, which, he said, was similar in 

 coloring to the one taken today." 



Mr. Drowne of the Webster-Harris Expedition reports^ 

 having seen on Duncan Island, September 9, 1897, a snake 

 that was about one and a half feet long, slender and blackish, 

 with white rings. 



It is probable that more abundant material will show that 

 more than one species has been included here under the name 

 Dromicus slevini. 



Dromicus steindachneri, new species. Steindachner's Snake 



Diagnosis. — No scale-pits; scales in 19 rows; gastrosteges 

 169 to 180; urosteges 96 to 114; longitudinal light stripes 

 present. 



Type. — Male. California Academy of Sciences No. 10795, 

 Indefatigable Island, Galapagos Archipelago. J. R. Slevin. 

 Jan. 16, 1906. 



Distribution. — This species has been found on Indefatigable, 

 South Seymour and Jervis islands. It is probable that more 



> Novitates Zool. VI, p. 117. 



