REPTILES OF THE PACIFIC COAST. 103 



b". — Dorsal and caudal scales weekly keeled. 



Dorsal scales in fourteen (or 14^) longitudimil series; interoccipitals 

 two or three (rarely one); azygous prefrontal 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'''. — Temporal scales keeled. 



Dorsal scales in sixteen longitudinal series; interoccipital plate 

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

 bands G. palnieri. — p. 113. 



28. — Gerrhonotus scincicauda (Skilton). Alligator 

 Lizard. 



? Gerrhonotus Weigmannii, Gray, 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, tigs. 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. bumettii 



Number with 12 2-2 scale rows 3 



" " U " " 80 



" 14 2-2 " " 3 



•' 15i •' " 4 



" If. " " 89 



•• " 18 " " 1 



86 61 



Number with one interoccipital 77 7 



" " 2 to 4 " 8 59 



" " no " 1 1 



86 63 



Number with azygous prefrontal large 82 7 



" " " moderate 4 20 



" " " " small 34 



86 61 



Number without dark lines on belly 2 IS 



" with dark lines in middle of ventral scale rows 84 



atjunction" " " " 48 



86 64 



