REPTILES OF THE PACIFIC COAST. 



b 2 . Dorsal and caudal scales weekly keeled. 



Dorsal scales in fourteen (or 14f) longitudinal series; interoccipitals 

 two or three (rarely one); azygous prefroutal of moderate size or 

 small; dark ventral lines between the series of scales, if present; 

 back without complete dark cross-bands . G. principis. p. 112. 

 a 2 . Temporal scales keeled. 



Dorsal scales in sixteen longitudinal series; interoccipital plate 

 single; azygous prefrontal large; back without distinct dark cross- 

 bands O. palmeri. p. 113. 



28. Gerrhonotus scincicauda (Skilton). ALLIGATOR 

 LIZARD. 



? Gerrhonotus Weigmannii, GBAY, Cat. Liz. Brit. Mus., 1845, p. 54 



(type locality Mexico?); O'SHAUGHNESSY, Ann. Mag. Nat. Hist. 



(4), XII, 1873, p. 46. 

 Tropidolepis scincicauda, SKILTON, Am. Journ. Sci. Arts, (2), VII, 



1849, p. 202, pi. at p. 312, figs. 1-3 (type locality Dalles of 



the Columbia). 

 Elgaria scincicauda, BAIBD & GIRARD, Stansbury's Exped. Gt. Salt 



Lake, 1853, p. 348, pi. IV, figs. 1-3; GIRARD, U. S Explor. 



Exped., Herp., p. 210, pi. XXIII, figs. 1-9. 



the position of the dark ventral lines), which are based upon an examination of 150 

 specimens. Some of the details of these specimens are: 



scincicauda. burnettii 



Number with 12 2-2 scale rows , 3 



" H " " 80 



" U 2-2 " " 3 



" 15J " " 4 



" 16 " " 59 



" 18 " " 1 



86 61 



Number with one interoccipital 77 7 



" 2 to 4 " 8 59 



" " no " 1 1 



80 63 



Number with azygous prefrontal large 82 7 



" " " " moderate 4 20 



" " " small 34 



86 61 



Number without dark lines on belly 2 16 



" with dark lines in middle of ventral scale rows 84 



" " " " at junction " " " " 48 



86 64 



