216 CALIFORNIA ACADEMY OF SCIENCES. 



72. — Crotalus lucifer Baird & Girard. Pacific Rattle- 

 snake. 



?Crotalus oregonus, Holbrook, N. A. Herp., 2 ed., Ill, 1842, p. 21, 



pi. Ill (type locality Columbia River). 

 Crotalus lucifer, B. & G., Proc. Ac. Nat. Sci. Phila., VI, 1852, p. 



177 (type locality Oregon and California). 

 Crotalus confluentus, Yarrow, Surv. W. 100th Mer., V, 1875, p. 530 



(part); Boulexger, Cat. Snakes Brit. Mus., Ill, 1896, p. 576 



(part). 

 Crotalus adamanteus atrox, Strekts, Bull. U. S. Nat. Mus., No. 7, 



1877, p. 40. 

 Crotalus confluentus lucifer, Cope, Proc. Ac. Nat. Sci. Phila., 1883, 



pp. 11, 19, 22. 

 Crotalus lecontei. Hallow., Kep. Pac. E. E. Surv., X, 1859, p. 18. 

 ^'Crotalus adamanteus var. lucifer, Jan, Elenco Sist. Ofid., 1863, p. 



124." 

 Crotalus oregonus var. lucifer, Garman, Mem. Mus. Compr. Zool., 



VIII, 1883, p. 173. 

 Crotalus confluentus lecontei. Cope, Proc. U. S. Nat. Mus., XIV, p. 



692. 



Description. — Moderately large. Head broad, flat- 

 topped, varying in outline according to position of 

 fangs, etc. Rostral much higher than wide, in contact 

 with anterior nasal. Two nasals. Usually two preocu- 

 lars and four internasals.- A large scale just in front of 

 supraocular and occasionally large scales on prefrontal 

 region. Supraocular large but not raised into a horn- 

 like process, sej^arated from its fellow by three to nine 

 irregular rows of scales. Fourteen to seventeen supe- 

 rior and fifteen to seventeen inferior labials, first pair 

 of latter in contact on median line in front of single 

 pair of geneials. Two to four rows of scales between 

 supralabials and eye. Scales in twenty-five to twenty- 

 seven rows, keeled except in one to three rows of each 

 side. Gastrosteges varying from one hundred and sixty- 

 three to one hundred and eighty-nine. Urosteges six- 

 teen to twenty-six, a few sometimes divided. 



The ground color is brown, olive, gray, or dull yellow. 



