928 16. CROTALWJE 



Caudisona lecontei COPE, in Mitchell's Research. Venom. Rattlesn , 



1861, p. 121; HAYDEN, Geol. Nat. Hist. Upp. Missouri, 1862, p. 



177. 

 Caudisona confluenta COPE, in Mitchell's Research. Venom Rattlesn., 



1861, p. 122; COPE, Proc. Acad. Nat. Sci. Phila., 1866, p. 309; 



COPE, Ann. Rep. U. S. Geol. Surv. Terrs., 1871 (1872), p. 476; 



ALLEN, Proc. Boston Soc. Nat. Hist., Vol. XVII, 1874, p. 69; 



COUES, Surv. W. looth Merid., Vol. V, 1875, P- 60.4- 

 Crotalus durissus WIED, Verz. Rept. Reisse Nord. Amer., 1865, p. 65, 



pi. VII, figs. 1-3. 

 Caudisona confluenta lecontei COPE, Proc. Acad. Nat. Sci. Phila., 1886, 



P- 37- 

 Crotalus adamanteus atrox YARROW, Surv. W. looth Merid., Vol. V, 



1875, P- 529- 

 t Crotalus lucifer YARROW, Surv. W. looth Merid., Vol. V, 1875, p. 



529. 

 Crotalus confluentus confluentus COPE, Proc. Acad. Nat. Sci. Phila., 1883, 



p. II; COPE, Proc. Acad. Nat. Sci. Phila., 1892, p. 336; COPE, 



Proc. U. S. Nat. Mus. Vcl. XIV, 1892, p. 692; TAYLOR, Amer. 



Naturalist, Vol. XXVI, 1892, p. 752; COPE, Report U. S. Nat. 



Mus. for 1898, 1900, p. 1170, fig. 336 (part). 

 Crotalus confluentus pulverulentus COPE, Proc. Acad. Nat. Sci. Phila., 



1883, p. ii (type locality, vicinity Lake Valley, New Mexico); 



COPE, Proc. U. S. Nat. Mus., Vol. XIV, 1892, p. 692; COPE, Re- 



port U. S. Nat. Mus. for 1898, 1900, p. 1174, fig. 337. 



Description. Moderate. Head broad, flat-topped, vary- 

 ing in outline according to position of fangs, etc. Rostral 

 much higher than wide, in contact with anterior nasal. Two 

 nasals. Usually two preoculars 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 ;* separated from its fellow by from 

 three to six irregular rows of scales. Fourteen to seven- 

 teen superior and a similar number of inferior labials; 

 first pair of latter meeting in front of single pair of 

 genials. Two to four rows of scales between supralabials 



"Carman mentions a specimen with horn-like supraocular. 



