536 REPORT OF NATIONAL MUSEUM, 1898. 



haviug- become obliterated, it was reentered in 1877 aud the original 

 label— or what remained of it — destroyed. 



The present species belongs to the same group as the foregoing, hav- 

 iug "three pairs of shields between the frontal and the rostral," or in 

 other words, "two pairs of internasal scuta." It differs from B. imhri- 

 cata, however, in the greater number of dorsal rows, both longitudinal 

 and transverse; in the obsolete carination of the dorsal scales; in the 

 exclusion of the loreal from the prefrontals; in the smaller size and 

 greater number of the temporals, and in the narrower and more elon- 

 gated shape of the head. It has the sixteen longitudinal rows of 

 dorsals in common with B.planifrons Bocourt, but the head shields are 

 swollen aud the other characters which separate it from B. imhricata 

 also distinguish it from B. -planifrons. B. rudicoUis is still farther 

 removed by the low number of the transverse dorsal rows, the strong 

 carination of the nuchal shields, and the contact of the nasal with the 

 rostral. 



A Barissia olivacea was described by Baird in 1858^ as North Ameri- 

 can, but Stejneger shows that the locality is uncertain, and that it is 

 the B. imhricata Wiegmann of Mexico. 



BARISSIA ANTAUGES Cope. 



Barrissia antauges Cope, Proc. Acad. Nat. Sci. Phila., 1866, p. 132; Proc. Amer. 



Phil. Soc, 1877, XVII, p. 96. 

 Gerrhonotns viridiflavus BocouRT, Ann. Sc. Nat., XVII, 1873, art. 2. 

 Gerrhonoius bocourtii Peters, Monatsber. Berl. Ac, 1876, p. 297. 

 Gerrhonotus antauyes Bocourt, Miss. Sci. Mex., Kept., 1878, p. 346, pi. xxi, fig. 4, 



pi. XXI B, fig. 7. — GiJNTHER, Biol. C. Amer. Kept., 1893, p. 37.— Boulenger, 



Cat. Liz. Brit. Mus., II, 1885, p. 277. 



Dorsal scales very obtusely keeled or smooth ; lateral scales smooth. 

 Lateral fold conspicuous. Nasal separated from the rostral. Frontal 

 preceded by two plates, as is the case in most of the species. Six inter- 

 nasorostrals. No supranasals or loreals. Genial entire. Loreal ocular 

 in contact with the sublabials. Tympanum encircled by small convex 

 scales. Tail of medium length. Upper surface of body a greenish 

 brown. Sides numerously streaked with black. Lower surfaces dark 

 green sjjotted with yellow. 



Head relatively short, wide behind, arched above, and covered with 

 smooth scales ; length from the end of the muzzle to the ear, equal to 

 twelve or thirteen transverse series of dorsal scales and enteriag four 

 and one-half times into the space between the chin and arms. Supra- 

 nasals small, separated in my specimen by a small azygous plate, which 

 is not present in Bocourt's specimens. There are two pairs of prefronto- 

 nasals on the top of the muzzle; the first pair are small, aud in the 

 specimen sent to M. Bocourt by Professor Peters, these two scales are 

 abnormally spaced from each other, and from their position could easily 



' Proc. Acad. Nat. Sci. Phila., 1858, p. 255. 



