440 



REPORT OF NATIONAL MUSEUM, 1898. 



Occipital liorns moderate, each with a sliort accessory horn at the 

 external base. Internal temporal horn half as long as the occipital, 

 with a short accessory horn at the external base. External temporal 

 horn very sliort, and the temporals anterior to it presenting a serrate 

 edge only. Infralabials presenting a serrate edge only. Parietal 

 region bonnded on each side by an augulate border whicli overhangs 

 the temporal region. 



Squamation of the head smaller than in other species. Superior 

 labials twelve to below the middle of the eye, instead of eight or nine 

 as in A.platyrhina., the nearest allied species. Seven subequal scales in 



Fig. 79. 

 Anot.v calidiakum Cope. 



X 1.5. 

 Death Valley, California. 



Cat. No. 1S444, U.S.N. M. 



the transverse row between the canthal rows on the frontal angle; 

 there are five unequal scales in the corresponding position in A. platy- 

 rhina. Six longitudinal rows of supraocular scales, of wliich a group 

 offiveorsix posterior to the middle are larger but unequal. Supra 

 orbital- rows in contact, except at points, on the median line. Last 

 superciliary presenting a sharp angle; penultimate also presenting a 

 prominent angle. Tomia of mouth only moderately serrate. A row of 

 conic scales rising i)osterioily, on the side of the neck, and above its 

 Ijosterior end an inconspicu(ms rosette. A conspicuous rosette above 

 the middle of the humerus. 

 Dorsal scales of irregular sizes and shapes. Those that may be called 



