CROCODILIANS, LIZARDS, AND SNAKES. 



585 



median, which is, with the latter, bounded by a few scales on the sides. 

 Median gular scales rather coarse, and abruptly contrasted with the 

 posterior gulars in a transverse line. Loreal longer than high. Small 

 scales above anterior canthus of eye numerous and rather prominent. 

 The keels of the caudal scales are prominent, and, except at the base of 

 the tail, in continuous lines. 



The color of the upper surfaces in the adult is a dove brown. This is 

 marked on the back by three series of transverse black spots, which are 

 well separated from each other. In one specimen the spots are very 

 narrow; in another they are nearly obsolete on the anterior part of the 

 back. On the sides similar black spots are more or less confluent 

 into vertical black stripes. The head and fore legs are uniform brown 

 above; the hind limbs have on a similar ground narrow blackish cross- 

 bars, sometimes indistinct. Tail pale brown above, with olive and 

 brown spots. Inferior surfaces straw-colored tinged with green, and 

 varied with black and red. The abdominal scuta are black bordered, 

 and the throat is black spotted, sometimes strongly, sometimes faintly. 

 The palms and sometimes the entire inferior surface of the anus is 

 a bright vermilion. Posterior and inferior sides of femora, inferior 

 aspect of tibia, and inferior side and distal half of tail bright vermilion. 



The young specimens have traces of six longitudinal stripes of an 

 olivaceous or light-brown color, and the spaces between them are cross- 

 barred with black and olive, as in the C. (jularu tnariariim, which this 

 form closely resembles at this stage. The black spots become more 

 distinct with age, and the interspaces blend completely with the 

 stripes, so that the latter are ultimately completely lost in a common 

 ground color. The femora are reticulated with black on an orange 

 ground above. The black and red of the inferior surfaces are not so 

 pronounced as in the adult. 



Measurements. — Total length, 340 mm.; length to posterior edge of 

 ear, 24 mm.; length to collar, 34 mm.; length to vent, 100 mm.; length 

 of fore limb, 35 mm.; length of hind limb, 72 mm.; length of hind foot, 



36 mm. 



Cnemidoplwrua tessellaius rubidus Cope. 



Catalogue ^-,b- 

 mens. 



15U9 

 15150 

 15151 

 15152 

 15153 

 15154 

 15155 



Locality. 



St. Margarita Island, Lower California 



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From whoni received. 



U. S. Fish Com. steamer Albatrosg. 

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