40. THAMNOPHIS 817 
to be nearer to the latter type than to the former. South 
of Del Norte County no tendency toward T. 0. ordinoides 
has been observed in 7’. o. atratus, unless it be that the rather 
frequent absence of the dorsal line in specimens from Hum- 
boldt and Mendocino counties may be so regarded. 
Our figures show that 14 per cent only of the specimens 
have two preoculars on one or both sides of the head. 
Snakes of the 7. 0. vegrans type occur in portions of the 
area occupied by TJ. 0. ordinoides, and often have two pre- 
oculars. There seems to be no good reason for calling them 
T. 0. ordinoides. It appears much more logical to consider 
them 7’. o. biscutatus, as was done in 1897, although speci- 
mens to show the continuity of range from the Klamath 
Lakes to Puget Sound are not at hand. 
185. Thamnophis ordinoides atratus (Kennicott) 
Coast GARTER-SNAKE 
Plate 88 
Eutainia ordinoides Barrp & Grrarp, Cat. N. Amer. Rept., Pt. 1, 1853, 
P- 33 (not of 1852); Girarp, U. S. Explor. Exped., Herp., 1858, 
p- 153, pl. XIV, figs. 1-4? 
Eutainia atrata Kennicott, U. S. Pac. R. R. Surv., Vol. XII, Pt. I, 
1860, p. 296 (type locality, California). 
Eutenia elegans ordinoides Cope, Proc. U. S. Nat. Mus., Vol. XIV, 
1892, p. 654; Core, Report U. S. Nat. Mus., 1898 (1900), p. 1046. 
Eutenia infernalis infernalis Corr, Proc. U. S. Nat. Mus., Vol. XIV, 
1892, p. 657; Cope, Report U. S. Nat. Mus. for 1898, 1900, p. 
1054 (part). 
Tropidonotus ordinatus var. infernalis BouLENGER, Cat. Snakes Brit. 
Mus., Vol. I, 1893, p. 207 (part). 
Thamnophis infernalis SreJ}NEGER, N. Amer. Fauna, No. 7, 1893, p. 210. 
Eutenia infernalis vidua Corr, Proc. U. S. Nat. Mus., Vol. XIV, 1892, 
p- 658 (type locality, San Francisco, Cal.); Cope, Report U. S. 
Nat. Mus. for 1898, 1900, p. 1055. 
Thamnophis elegans Van Denzurcu, Occas. Papers Cal. Acad. Sci., 
Vol. V, 1897, p. 207 (part). 
