986 



REPORT OF NATIONAL MUSEUM, 1898. 

 Natrix valida valida Kennicott. 



Catalogue 

 Ko. 



4650 

 4683 



1309 

 12642 



Number 

 of speci- 

 mens. 



Locality. 



Rabeh Valley, TJtah. 



When 

 collected. 



From wlioin received. 



Cape St. Lucas, Lower 

 California. , 



Durango, Mexico 



La Paz, L. California 1 Feb. — , 1881 



Capt. J. H. Simpson 



U. S. A. 

 John Xantus , 



Dr. Thos. H. Webb 



L. Belding 



Nature of 

 specimen. 



Alcoholic, 

 do. 

 do. 



NATRIX VALIDA CELiENO Cope. 

 Tropidonotiia celamo Copk, Proc. Acad. Nat. Sci. Pliila., 1860, p. 341. 



Scales iu nineteen or twenty-one rows, all cariuate except the first. 

 Head broad and distinct posteriorly, constricted at tlie orbits, and 

 remarkably narrow anteriorly. Profile of the crown slightly but regu- 



Fig. 260. 



Natrix valida cel^no Copk. 



=--1. 



Cape St. Lucas, Lower California. 



Cat. No. 5281,U.S.N.M. 



larly convex. Superciliary plates narrow and elongate. Vertical elon- 

 gate, its lateral borders concave, not convergent posteriorly, its length 

 greater than that of the occipital suture. Froutals small, the anterior 

 almost triangular. Nasals and loreal rather large, the posterior border 

 of the latter very oblique. Preocular one, postoculars three, superior 

 labials eight, eye resting on the fourth and fifth, sixth and seventh 

 largest and bounded above by the first temporal. Remaining tempo- 

 rals four on each side. Inferior labials ten, sixth longest. Posterior 

 geiieials longer than the anterior. General form rather slender, tail 

 one-fifth the total length. Gastrosteges, 145; one divided anal; uros- 

 teges, 71. 



The general color is leaden black above and below, with the following 

 paler markings: A band of leaden gray begins upon the neck, occupy- 

 ing the second, third, and i)art of the first rows of scales. This extends 

 to the anus, becoming darker and leaving the first row of scales poste- 



