﻿14. GERRHONOTUS 437 



88. Gerrhonotus principis (Baird & Girard) 

 Northern Alligator Lizard 



Elgaria principis Baird & Girard, Proc. Acad. Nat. Sci. Phila., 1852, 



p. 175, (type locality, Oregon and Puget Sound); Girard, U.S. 



Explor. Exped., Herp., p. 214, pi. XXII, figs. 9-16; Lord, Naturalist 



Vancouver Island, Vol. II, 1866, p. 302. 

 Gerrhonotus (Elgaria) principis O'Shaughnessy, Ann. & Mag. Nat. Hist., 



Ser. 4, Vol. XII, 1873, p. 48. 

 Gerrhonotus principis Cope, Bull. U. S. Nat. Mus., No. 1, 1875, P- 46; 



Yarrow, Bull. U. S. Nat. Mus., No. 24, 1883, p. 47; Stejneger, 



N. A. Fauna, No. 7, 1893, P- '97? ^ AN Denburch, Occas. Papers 



Cal. Acad. Sci., V, 1897, p. 112; Van Denburch, Proc. Acad. Nat. 



Sci. Phila., 1898, pp. 64, 65; McLain, Critical Notes, 1899, p. 9; 



Cope, Report U. S. Nat. Mus. for 1898, 1900, p. 529, fig. 95; Stone, 



Proc. Acad. Nat. Sci. Phila., 191 1, p. 230; Stejneger & Barbour, 



Check List N. Amer. Amph. Rept., 1917, p. 62. 

 Gerrhonotus grandis Yarrow, Bull. U. S. Nat. Mus., No. 24, 1883, p. 47 



(part). 

 Gerrhonotus cceruleus Boulenger Cat. Lizards Brit. Mus., Vol. II, 1885, 



p. 273 (part). 



Description. — Body long and rather slender, with short 

 limbs and long tail. Head pointed, with flattened top and 

 almost vertical sides, its temporal regions sometimes slightly 

 swollen. Rostral plate large, and rounded in upper out- 

 line. Behind it, on top of head, follow a pair of small 

 internasals, a pair of frontonasals, a moderate-sized or small 

 azygous prefrontal, a pair of prefrontals, a long frontal, a 

 pair of frontoparietals, two parietals with an interparietal 

 between them, and a pair of occipitals separated by one or 

 usually two or three interoccipitals. Two series of supra- 

 oculars and a series of small superciliaries. Upper tem- 

 poral scales usually smooth, and lower two or three series 

 always so. Upper labials much larger than lower. Below 

 latter, two series of sublabial plates, lower much the larger. 

 Gular scales inbricate and smooth. Scales on upper surfaces 

 and sides of neck, body, and tail large, rhomboidal, slightly 



