NATURAL SCIENCES OP PHILADELPHIA. 821 



1 



This species is nearest the T. coecatus Jan., which is found on the Gold 

 Coast, West Africa. 



Museum Smithsonian, No. 6G02. 



SAURIA. 



Plistodon sumichrasti sp. nov. 



No freno-nasal plate ; scales of body in twenty-eight longitudinal rows, the 

 laterals not oblique. Inner posterior toe shorter than the fourth. The limbs 

 being extended, the anterior digits reach the base of the external posterior. 

 Two extended transverse plates behind each parietal ; exterior to the latter 

 a large oblique temporal separated from labials by a trapezoid plate. Superior 

 labials nine, eight much largest. Auricular meatus two-thirds eye slit. Four 

 supraorbitals. Interparietal narrower than frontal, shorter than from ante- 

 rior angle, latter to end muzzle acuminate anteriorly ; frontonasals longitudi- 

 nal, largely in contact, internasal transverse, well separated from rostral by 

 supranasals. Preirenal higher than long. 



Grayish olive with an indistinct blackish band on each side commencing at 

 the ear ; tcp of head light yellowish brown; below pale. End of muzzle to 

 vent 3 in. 7 lin. ; to fore arm 1 in. 3 1. ; length posterior limb 18*5 lines. 



This species is allied to the P. marginatus Hallow., of Japan, and the 

 P. fasciatusof the United States. It is the second species now known in 

 Mexico ; the other, P. lynxe Weigmann, is smaller, and in form and color 

 like a Mabuia. 



Museum Smithsonian, No. 6G01. Orizava, F. Sumichrast. 



Diploglossus chalybaeus sp. nov. 



Thirty four rows of scales on the body, those of the body rectangularly 

 arranged, sixteen near the base of the tail ; those of the tail with sixteen 

 strise, the median of which is raised so as to give an angulated appearance. 

 Scales of the posterior part of the body with eight and nine striae, those of the 

 anterior regions smooth. Internasal broader than long, angulation front ; 

 frontal truncate anteriorly, convex and broader posteriorly ; frontoparietals 

 small, separated by their width. Interparietal nearly or quite as large as 

 parietal, succeeded by a median plate. Five supraorbitals, marginals | 3 ; 

 frenal and prefrenal touching ; or frenonasal above postnasal. Limbs Ex- 

 tended along the sides, separated by the length of the hind limb. 



Length of larger specimens from end of muzzle to vent 3 5 in. ; do. smaller 

 specimen 2*5 in. ; vent to end of tail of same 3 - 5 in. 



Sides of head and body with limbs, black ; sides of head aud neck with some 

 small greenish spots. Dorsal region for a width of sven and two half rows of 

 scales olive brown, the edges of each row blackish and forming narrow imper- 

 fect lines ; top of head spotless ; below pale greenish. 



Habitat. Mountains of Orizava, Vera Cruz, at an elevation of from 4000 to 

 6000 feet ; Prof. F. Sumichrast, Museum Smithsonian, No. (it)03. 



Gerrhonotus ophiurus sp. nov. 



This species belongs to the subtype of the genus represented by G. t e s s e 1- 

 1 atu s, but differs from the latter in the much longer tail and shorter limbs, 

 and different arrangement of plates on the head, viz. : 



Group I. Three pairs of supranasals, with azygus plate between first pair; 



scales 1JL 



One preoeular, two loreals, posterior canthal descending to 

 labials. Legs separated by length, of hind leg. Belly im- 

 maculate ; tail shorter ventralis. 



Two praeoculars, two loreals, posterior canthal descending to 

 labials. Tail moderate ; extended legs separated by length 

 of fore arm ; brown above witk ten cross bands ; belly black 

 spotted tessellatus. 



lSrjtj.J 21 



