4-0. THAMNOPHIS 



to be nearer to the latter type than to the former. South 

 of Del Norte County no tendency toward T. o. ordinoides 

 has been observed in T. 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 T. o. vagrans type occur in portions of the 

 area occupied by T. o. 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 T. o. biscutatus, as was done in 1897, although speci- 

 mens to show the continuity of range from the Klamath 

 Lakes to Puget Sound arc not at hand. 



185. Thamnophis ordinoides atratus (Kennicott) 



Coast Garter-Snake 



Plate 88 



Eutainia ordinoides Baird & Girard, Cat. N. Amer. Rept., Pt. i, 1853, 



p. 23 (not of 1852); Girard, U. S. Explor. Exped., Herp., 1858, 



p. 153, pi. XIV, figs. 1-4.' 

 Eutainia atrata Kennicott, U. S. Pac. R. R. Surv., Vol. XII, Pt. II, 



i860, p. 296 (type locality, California). 

 Eutania elegans ordinoides Cope, Proc. U. S. Nat. Mus., Vol. XIV. 



1892, p. 654; Cope, Report U. S. Nat. Mus., 1898 (1900), p. 1046. 

 Eutania injernalis injernalis Cope, 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. injernalis Boulenger, Cat. Snakes Brit. 



Mus., Vol. I, 1893, p. 207 (part). 

 Thamnophis injernalis Stejneger, N. Amer. Fauna, No. 7, 1893, p. 210. 

 Eutania injernalis vidua Cope, 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 Denburgh, Occas. Papers Cal. Acad. Sci., 



Vol. V, 1897, P- 207 (part). 



