CROCODILIANS, LIZARDR, AND SNAKES. 441 



the grouud scales are smaller, flat, and nut keeled. Tliey are inter- 

 rupted by a few keeled scales. Besides these there is a number of rows 

 of larger keeled scales, wliich are free ]>osteriorly and are surrounded 

 by a rosette at the l)ase. The least i)r()miueut are those near the mid- 

 dle line; Just external to these are the largest. They diminish in size 

 toward tlie lateral borders. There are large keeled scales on the 

 shoulder. This tract divides, the wider baud extending on the jiosterior 

 face of the humerus; the narrower, only one scale wide, extending on 

 the anterior side io the elbow. The scales of the external side are of 

 mixed sizes, and are larger than those of the internal side. The s(;ales 

 of the external face of the femur and tibia are like those of the dorsal 

 region. Tail subround, bordered by a fringe of rather widely spaced 

 conic scales. 



Head scales moderately rough, tending to i)resent a single tubercle 

 larger than the others ; scales of inferior surfaces smooth. The extended 

 bind leg reaches to the humerus. Femoral ])ores G-8, in a rosette. 



Measuroxents. — Total length, 112 mm. ; length to vent, 73 mm. ; length 

 to gular fold, 14 mm. ; length of fore leg, '.)5 mm. ; length of fore foot, 11.5 

 mm.; length of hind leg, 46 mm.; length of hind foot, 20 mm.; length of 

 head to interoccipital border, 17 mm.; length of occipital horn, 7 mm.; 

 length of internal temporal horn, 4 mm.; width of head (greatest), 20 

 mm. ; width of head between superciliary angles, 13 mm. ; width of body 

 at middle, 38 mm. 



( 'Olor above ashen, with blackish crossbars, which are well defined 

 posteriorly only, and which are interrupted on the middle line, except 

 on the tail, where they are continuous. Each half of the two dorsal 

 bars presents a chevron forward. Those crossing at the groin and 

 posterior to the vent are undulating. A large blackish spot on each 

 side of the neck; head unspotted; humerus, elbow, and forearm each 

 with a faint spot; femur and tibia each with a more distinct blackish , 

 crossbar. Inferior surfaces cream-colored, except a few small black 

 spots on the posterior face of the femur and base of the tail and some 

 fainter ones on the posterior part of the abdomen. 



Anota calidiarum Cope. 



From ■whom received. 



Nature of 

 specimen. 



Death Vallej-, Ualili.niia ' U. S. Agricultural Depart- Alcoholic. 



I nient. 



This species is nearest to the A. platyrhina Girard, from which it 

 differs in various respects. The general i)roportions of all the parts 

 and the colorntion are about as in that species, the difference chiefly 

 appearing in the squamation and the horns. The scales of the head are 

 much more subdivided, and the presence of accessory horns is unique in 

 the genus. The simplicity of the lateral fringe is also characteristic, 

 as is also the rndimental character of the rosette on the neck. 



