NATURAL SCIENCES OF [PHILADELPHIA. 179 



end of temporal horn 1 inch 4 lines ; to end of superciliary do. 1 inch. Width 

 of front between middle of superciliary ridges 8 lines. Width of body (exclusive 

 of lateral spines) 3 inches 4 lines. 



General color ashy ; the fiead pale ; the body brownish : from occiput to groin 

 between dorso-lateral and lateral rows of spines, deep brown, leaving a narrow 

 pale space on nape. Four broad brown cross-bands anterior to sacral region, 

 pale bordered posteriorly ; nearly obsolete in $ ; tail with many brown, pale- 

 edged cross-bands; below unspotted. 



Habitat. Colima, Mexico; from consul John Xantus. 



This is the largest species of horned frog, and very distinct. Its affinities are 

 between cornutum and coronatum. 



Gerrhonotus g r a m i n e u s. 



Two pairs supranasals ; the posterior longitudinal, elongate ; internasal 

 smaller than frontonasals. Four short supraorbitals ; four marginals. Eleven 

 supralabials. Two frenonasals, the smaller above the larger; one frenal 

 and one very large freno-ocular. Six in first, five in second row of infralabials. 

 Muzzle not produced ; plates of head thickened and roughened, especially en- 

 larged on the temporal region. Dorsal scales in twenty-three longitudinal se- 

 ries from nape to opposite groin, and in fourteen longitudinal rows ; in form 

 twice as long as wide, thick, with an obtuse keel, roughened in old specimens. 

 Abdominal scales in twelve and fourteen series ; lateral fold very weak. Ex- 

 tended limbs touching, or the posterior reaching wrist. Muzzle to ear I incli ; 

 to vent 4 inches 4 lines ; vent to axilla 2 inches 11 lines ; to end of tail 6 in. 

 3 lines ; anterior limb 1 inch 2 lines; posterior 1 inch 7 lines. 



Above bright pea green, each transverse series of scales blackish at the 

 base, and yellowish at the tips. Below pale green, with a reddish tint in 

 some, gular region and lower jaw yellow, abruptly separated from the green 

 of the neck. 



Habitat. Orizaba, Mexico. Mus. Smithsonian. From a fine collection (No. 

 50), made by Prof. Sumichrast, which contained also Spilotes poecilono- 

 tus and Atropus undulatus. The Professor has recently published some 

 interesting observations on the habits of certain Mexican reptiles in the Ann. 

 Mag. N. Hist., 1864, p. 497. 



Diploglossus steindachneri. 



Tail cyclotetragonal. Scales in thirty-two longitudinal rows, (ten dorsal), 

 without central keel, eight and ten striate. Limbs weak, not meeting when 

 pressed to side by the length of the hind foot; digits much compressed, claws 

 acute. Five supraorbitals; frontal longer than broad, subparallelogrammic. 

 No frontonasals ; internasal broader than frontal. Supranasals very large. 

 Two frenonasals, one above the other ; one very high prefrenal ; two postfrenals, 

 one above the other ; one freno-orbitar. Nine supralabials. Interparietal tri- 

 angular, longer than broad, separating the short parietals, whose posterior out- 

 line is emarginate and embraces the broader than long postparietals ; fronto- 

 parietals very small. End of muzzle to shoulder 1 in. 1 1. ; shoulder to vent 2 

 in. 6 1. ; vent to end of tail 5 in. 2 1. ; posterior limb 1 in. 2 1. 



Olivaceous, the sides tessellated with small black spots, which become bands 

 on the axillary and postauricular regions ; lips greenish, black spotted ; below 

 uniform pale greenish. 



Hab. Orizaba, Mexico. Sent to the Mus. Smithsonian, (No. 6342), by Prof. 

 F. Sumichrast. Dedicated to Dr. Franz Steindachner, of the Imperial Museum 

 of Vienna. 



Lampropholis assatus. 



Scales small, entirely equal, in thirty longitudinal rows. Body subcylin- 

 drical : head short, not depressed. Tympanum large, in a deep depression, 

 which is not fringed. Nasals and frontonasals respectively not in contact. In- 



1864.] 



