REPTILES 6l 



PHYLLODACTYLUS GILBERTI sp. nov. 



Type. — Cat. No. 4549, adult male, Leland Stanford Junior Univer- 

 sity Museum ; Wenman Island, Galapagos Archipelago, December, 

 1898. 



Ra7ige. — Galapagos Archipelago : Wenman Island (Hopkins Stan- 

 ford Expedition). Occurs abundantly under the loose lava blocks and 

 scoria. 



Specific Characters. — Dorsal tubercles small, keeled, in two to six 

 continuous longitudinal series on dorsum ; rump crossed by eight rows 

 becoming ten anteriorly, the outer series on each side disappearing 

 before reaching middle of back. Occiput covered by equal granules. 

 Tail inferiorly with a median series of enlarged scales. Digital pal- 

 lets wide, more than one half diameter of eye, trapezoid. Mental tri- 

 angular, not much larger than the first infralabial. 



Description of the Type. — Dorsal tubercles small, two or three 

 times the size of the dorsal granules, rounded, juxtaposed and feebly 

 keeled, in ten longitudinal series on sacral region ; back and nape 

 crossed by four rows, the three outer rows on each side disappearing 

 before reaching middle of back. Rows of tubercles separated by two 

 or three rows of granules ; tubercles in the rows juxtaposed with few ex- 

 ceptions. Digital pallets wide, four times width of rest of digit, 

 nearly two thirds diameter of eye, trapezoid. Fourth toe with four- 

 teen transverse lamella3 inferiorly, the distal one divided. Head large, 

 one half as long and two thirds as wide as the body. Ear opening 

 elliptical, oblique, two thirds diameter of eye. Snout rounded at tip, 

 the dorsal profile oblique ; length slightly less than twice the diameter 

 of eye. Interorbital more or less concave ; occipital region flat. 

 Limbs moderate, the appressed fore limb reaching anterior border of 

 eye ; hind limb reaching appressed elbow. Head covered above with 

 equal granules, smallest on occiput, becoming gradually larger anteri- 

 orly. Nostril situated between rostral, first superior labial, internasal 

 and two posterior nasals. Internasals contiguous. Rostral twice as 

 broad as high, slightly pentagonal with a median cleft above, bordered 

 dorsally by two internasals. Mental subtriangular, longer than wide 

 with obtuse angle posteriorly, followed by two hexagonal submentals. 

 Superior labials six before middle of pupil, twice as long as high ; five 

 inferior labials anterior to middle of pupil, as high as long, first larg- 

 est and more than two thirds size of mental. Belly and lower sur- 

 faces covered with smooth, rounded, imbricate scales; forty-five trans- 

 verse series between axilla and groins. Tail of type imperfect. In 

 younger specimens the tail is cylindrical, tapering gradually, covered 



