310 PROCEEDINGS OF THE ACADEMY OP 



with several series small brown spots, median largest. Deserts of Gila and 

 Colorado. 



m. Prenasal separated from rostral by scales; superciliary not prolonged. 



C. mitchellii Cope. Rostral broad as long ; scales 25 rows ; labials 16, 

 separated from orbits by three rows ; two elongate preorbitals, one loreal ; 

 yellowish- gry, with indistinct quadrate dorsal spots separated by yellow, 

 and becoming cross-bands on posterior fourth. Rattle parallelogrammic. 

 Lower California. 



C pyriiha Cope. Rostral broad as long ; head very obtuse rounded. Scales 

 25 rows, seven between superciliaries, three below orbit; labials 14; two 

 very small preorbitals and four loreals. Pale vermillion varied with yellow 

 on the sides of the belly, with numerous large reddish-bay transverse hexa- 

 gons, which become transverse bands on posterior two-ihirds of length ; 

 yellow below. Rattle subacuminate. Arizona. 



The C. lepida of Kennicott remains, which is the type of a genus now first 

 defined under the name of 



Aploaspis m., and characterized by the presence of a single large nasal 

 shield, which is pierced by a small central nostril. 



I. Muzzle with numerous smooth plates above. 



A. lepida Kennicott. Rostral broad, low ; scales of top of muzzle and 

 vertex large, smooth ; upper preorbital very small, loreals three ; labials 

 twelve, separated by one row from orbit ; no postocular band. Rio Grande, 

 Texas. 



Testddinata. 



Aromochelys carinatus Gray, Catal. Shield Rep. Brit. Mus. Ozotheca 

 tristycha Agassiz, Coutrib. N. Hist. U. S., vol. i. 



To the forty-four species procured by Dr. Coues may be added the follow- 

 ing, procured by Dr. Irwin from the neighborhood of Fort Buchanan (near 

 Tucson), in the southern part of the territory : 



Uma notata* Bd. Trimorphodon lyrophanes Cope. 



Gyalopium canum Cope. 



Added chiefly by Maj. Emory, on the United States and Mexican Boundary 

 Survey, mainly according to the Report by Prof. Baird. 

 Cnemidophorus melanostethus Cope. 



" gracilis Bd. Caudisona atrox Bd., Gird. 



Euphryne obesa Bd. " tigris Ktnn. 



Uta graciosa Hallow. " cerastes Hallow. 



Sceloporus clarkii Bd., Grd. Tropidonotus validus Kenu. 



Dipsosaurus dorsalis Hallow. Ophibolus splendidus Bd., Gird. 



Callisaurus ventralis Hallow. Phimoihyra grahamice Bd., Gird. 



Phrynosoma regale Gird. Sonora semiannulata Bd,, Gird. 



" maccallii Hallow. Chionactis occipitale Hallow. 



Coleonyx variegatus Baird. Diadophis regalis Bd. Gird. 



Bufo alvarius Gird. 



" debilis G. (insidior Gird.) 

 Hyla cadaverina Cope. 

 In all, sixty-eight species, referrable to twenty-seven genera. Of the latter 

 there are : 



* This is the only adult in the Smithsonian Museum, a young specimen having previously served 

 as the type. The genus is distinguished from Callisaurus hy the presence of a series of spines 

 moveable on their Liases, on the outer margin of the f >ot. 



The coloration is peculiar ; ground color black, covered everywhere by large yellow (red ?) disci- 

 form spits, whose margins are everywhere nearly in contact, leaving a pattern like the refuse of 

 a button-maker's plates; each spot has a black centre. Leugth eight inches, tail short. 



[Oct. 



