REPTILES OF THE PACIFIC COAST. 103 



b-. — Dorsal and caudal scales weekly keeled. 



Dorsal scales in fourteen (or 14|) longitudinal 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. palmeri. — 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, Baird & 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 

 3 



1 



86 64 



interoccipital 77 7 



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 16 



" with dark lines in middle of ventral scale rows 84 



" " " " at junction " " " " 48 



86 64 



