CROCODILIANS, LIZARDS, AND SNAKES. 



1195 



scales, as well as of those separating the pieuasal from the rostral, is 

 very variable, so that the distinction between the two supposed species 

 is purely individual. 

 Scale and plate formula of typical form : 



Cat. No8. 



Scales. Upper labials. Gastroateges. Urosteges. Length. Tail. Rattle. 



]2()25 25. 



529U 25. 



Kg. 346. 



CROTAI.US MITCHELLII COPE. 



Anjrel Island Bay, Lower California. 



C.it.No.85r,i, U.S.N.M. 



The coloration of the type specimen of the C. pyrrhus is as follows: 

 The general tint of the specimen from which this species was 

 described is a bright salmon red on the up])er surfaces, the scales of 

 the inferior rows punctulated with brown. This color is marked by a 



