Vol.1] VAN DENBURGH— GECKOS OF GALAPAGOS ARCHIPELAGO 421 



Albemarle islands. Dr. Baur collected ten specimens on Albe- 

 marle. Heller records twenty-two from Iguana and Tagus 

 Coves, Albemarle, secured by the Hopkins-Stanford Expedi- 

 tion. The Academy collection includes seventy-nine specimens, 

 as follows: four from Indefatigable, two from James, seven 

 from Cowley Island, four from Brattle, five from Tagus Cove, 

 Albemarle, two from Cowley Mt., Albemarle, ten from Iguana 

 Cove, Albemarle, and forty-three from Vilamil and Cobos Set- 

 tlement in southeastern Albemarle. 



Description of No. 11262 from Iguana Cove, Albemarle. Head elongate ; 

 snout shorter and less depressed than in other species of Galapagoan 

 geckos, a little more than one and a half times as long as the diameter of 

 eye; ear-opening small, with very slight anterior denticulation of three or 

 four scales, about as far as nostril from eye. Body and limbs moderate, 

 somewhat depressed, tail cylindro-conic. Snout covered with subequal, 

 smooth rounded granules. Hinder part of head, temples, neck, and back 

 and sides of body covered with smaller, smooth granules. No enlarged 

 tubercles on limbs. Occiput and anterior part of neck with scattered 

 enlarged tubercles. Back, from root of tail to posterior part of neck, with 

 very distinct regular rows of enlarged, keeled, trihedral tubercles. These 

 large tubercles are in six rows on each side of midline at middle of body. 

 The tubercles in each row are set close together, or are separated by not 

 more than the diameter of one small dorsal granule. Rostral much broader 

 than high. Nostril between rostral, first labial, and three nasals of which 

 the upper is largest and is separated from its fellow of the opposite side 

 by a small plate. Eight or nine upper and seven or eight lower labials. 

 Mental large, a little longer than broad, bordered behind by three post- 

 mentals, which are followed by polygonal shields which gradually pass into 

 the smaller gulars. Lower surface of body covered with smooth, imbricate 

 scales which change gradually into the granular laterals and gulars ; about 

 thirty to forty longitudinal and seventy to seventy-five transverse series. 

 Tail covered with whorls of small imbricate scales, feebly keeled on the 

 dorsal surface of the base of the tail, elsewhere smooth ; no inferior median 

 series of broad plates. Limbs without enlarged tubercles; digits rather 

 slender, distal pads large, truncate ; about twelve lamellae under fourth toe. 



The general color above is brownish gray, spotted and dotted on the 

 limbs, head, neck and body with blackish brown. These dark markings 

 tend to form seven or eight irregular cross-bars on the body. There is a 

 faint dark streak from nostril to eye, and a very distinct one from the eye 

 to the side of the neck. The tail bears seventeen dark brown cross-bars. 

 The lower surfaces are hght brown, minutely dotted with dark brown and 

 with a few yellow spots and blotches on throat and tail. 



Length to anus 45. 



Snout to orbit 5-3 



Snout to ear 11-2 



Orbit to ear 4. 



Fore limb 16.5 



Hind limb 21. 



Base of fifth to end of fourth toe 5.5 



Variation. — The number of postmentals in contact with the 

 mental plate varies considerably, but usually is more than two. 

 The variation in this respect is shown in the following table : 



