102 PROCEEDINGS OF THE ACADEMY OP 



menis, and resembles that figured by Seba, pi 68, no. 6, on which Klein (Ten- 

 tamen, p. 39.) founded his Coluber exetra, aquaticus. There were also 

 in the collection Lygophis a n o m a 1 u s, Heterodon d'orbignyi (ground 

 color of abdomen and tail red !). Philodryas schottii, Oxyrhopus s p a d i- 

 ceus, plumbeus, Opheomorphus d o 1 i a t u s. 



Gonatodes g i 1 1 i i Cope, sp. nov. 



Premaxillary teeth eleven. Inferior labials four ; symphyseal thrice as large 

 as the anterior labial, longer than broad, each of its two posterior sutures 

 shorter than its lateral, and joining at an obtuse angle. Six scales in the 

 first transverse mental row, two median in contact with symphyseal; behind 

 these about four rows of hexagonal scales, becoming smaller and more circu- 

 lar. Superior labials five. Internasals separated by one row of scales. 

 Frontal scales larger than gular, much larger than dorsal, which equal occipi- 

 tal. Scales of abdomen and anterior faces of limbs larger, rounded, imbricate; 

 of tail large, hexagonal; a row of plates beneath. Length from muzzle to 

 vent 3". 



Lateral regions bluish grey, sides of abdomen much darker. Dorsal region 

 nearly black, with a median jellow vitta extending from the end of the muzzle. 



Habitat. Trinidad. From the collection of the well-known zoologist, Prof. 

 Theodore Gill, whose name I take much pleasure in attaching to this very 

 pretty species. 



I have employed Fitzinger's name for this genus, instead of Goniodactylus 

 of Kuhl, which should be applied to that called Cyrtodactylus by Gray. 



Gonatodes ferrugineus Cope sp. nov. 



Premaxillary teeth eleven. Inferior labials five ; superior six or seven. 

 Symphyseal as broad as long, twice as large as anterior labial. Two large 

 scales in first mental row, five in the second, five rows behind these gradually 

 diminishing in size. About thirteen longitudinal rows of scales on the thorax. 

 Scales of the upper surfaces very small, those of the front large. Length from 

 muzzle to vent 3'". 



Color cinnamon ; the thorax and abdomen dirty white, the gular region mot- 

 tled with the same. 



Habitat. Trinidad. Prof. Gill's Collection. 



The head of this species is rather narrower than that of the g i 1 1 i i, and the 

 squamation of the superior surfaces more minute. 



Diplodactylus u n c t u s Cope, sp. nov. 



Scales rounded, flat in about 3G rows on the dorsal region; those of the 

 muzzle smaller than dorsal, little larger than those on the occiput. Interna- 

 sals in contact. Seven superior labials, including that under the pupil ; six 

 inferior, to the same point, the last two very small, the first larger than the 

 second, extensively in contact with the first pair of mental plates, which bound 

 the symphyseal posteriorly. Each of the former is bounded by three smaller, 

 and these are succeeded by a few rows which diminish in size. Terminal discs 

 with straight outlines. Tail without tubercles. Anal scales similar to the 

 abdominal. Auricular opening as long as pupil. Premaxillary teeth five. 

 Length from end of muzzle to auricular meatus 12'", from the same point to 

 vent 4-5". 



Above grey, shining, with five broad, blackish, centrally-pale cross-bands, 

 from base of tail to interscapular region. A dark band from the muzzle 

 through the eye, a cross band on occiput, and various irregular spots on the top 

 of head and labial regions. 



Habitat. Cape St. Lucas, Lower California. Sent to the Smithsonian Insti- 

 tution by John Xantus, Esq. (No. 5304.) 



Phyllodactylus x an ti Cope, sp. nov. 



Dorsal tubercles rather small, not trihedral, in very irregular, broken, lon- 



[April, 



