AET. 12 EEVISION" OF LIZARDS OF GENUS CTENOSAURA BAILEY 



Material examined. — 



27 



CTENOSAURA BREVIROSTRIS (Cope) 



Plates 12, 13, 15 



Ctenosaura brevirostris Cope, 1886, Proc. .^mer. Philos. Soc, vol. 23, pp. 266-268; 



1887, Bull. 32, U. S. Nat. Mus., p. 34; 1900, Rep. U. S. Nat. Mus. for 1898. 



p. 238. 

 Ctenosaura acanthura Gunther, 1890, Biol. Cent. Amer., Rept. Batr., p. 57, 



(Part). 



Type.— Ceit. No. 24709, U.S.N.M., male. 



Type locality. — Colima, Colima, Mexico, John Xantus, collector. 



Diagnosis. — This species is very similar to Ct. pectinata, but may 

 be distinguished from it by the very short head with an obtuse muzzle, 

 exhibiting a pronounced decurved profile. 



Distribution. — This species occurs on the Pacific foothills of the 

 mountain ranges from Jalisco southward to Oaxaca. The type was 

 taken at Colima City; others have been taken at San Marcos, Jalisco; 

 Manzaniilo, Colima; Sierra Madre, Michoacan; and Guichicovi, 

 Oaxaca. Over 90 specimens were collected at Colima by John Xantus. 



Description. — U.S.N.M. Nos. 24708, adult female; 24709, half grown 

 male cotype; 47933, adult male. The following description is from 

 Cope's original, with modifications according to the writer's observa- 

 tions of the types. 



