San Nicolas Island.
San Nicolas Island is the type locality of Xantusia riversiana. No other reptile has been found there.
1. Xantusia riversiana Cope.
Plate V, Fig. 2.
Xantusia riversiana Cope, Proc. Acad. Nat. Sci. Phila. 1883, p. 29; Rivers, Am. Nat. v. 23, 1889, p. 1100; Van Denburgh, Proc. Cal. Acad. Sci. 2d ser. v. 5, 1895, p. 534; Van Denburgh, Occas. Papers, Cal. Acad. Sci. 5, 1897, p. 132; Cope, Report, U. S. Nat. Mus. 1898 (1900), p. 552.
In describing this species Cope failed to state where his specimens were collected. Rivers later assigned them to San Nicolas Island, but the matter has remained open to question. I am, therefore, very glad to be able to record the fact that Mr. Joseph Grinnell has sent me three specimens of this Xantusia taken by himself on San Nicolas Island, May 22-23, 1897. One of these specimens is uniform drab, with a few dark spots. The others are of the handsome striped style of coloration (see plate).