Crossing tlic l^aldcz Glacier. — Abcrcrombic. 349 
Testudo from the Loup Fork beds of Kansas and identified it 
with Prof. Cope's T. undata, described* from the Loup Fork 
deposits of New Mexico. Since nothing is known of the latter 
species except a few marginals and a costal bone, there is really 
no evidence that the fine skull described by Gilbert belongs to 
T. undata. The probabilities are greater that it belongs to one 
of the species described by Prof. Copef from the Loup Fork 
beds of Kansas, Testudo orthopygia and T. cyclopygia. Of 
T. orthopygia Prof. Cope possessed most of the skeleton in- 
cluding the skull. A comparison of Mr. Gilbert's figures and 
description with the description of Prof. Cope makes it pretty 
certain that the former is not identical with T. orthopygia. Of T. 
cyclopygia the skull is not known, and we have no means of 
comparing it with Mr. Gilbert's species. This being the case, it 
is better, I believe, to give the latter a distinct name, so that its 
literature may be kept separate until further discoveries dem- 
onstrate its relationship to other described forms. I name it in 
honor of its describer Testudo gilbertii. 
CROSSING THE VALDEZ GLACIER, 
ALASKA, AT BATES BAY. J 
By Captain W. R. Abercrombie. 
Everything being in readiness July t.'j, the fog set in so 
dense it was decided not to attempt to cross the glacier until 
landmarks could be discerned. July 31 Private Garrett was 
sent up on the third bench of Valdez Glacier to bring in eight 
prospectors who had lost their way in attempting to cross 
Bates Pass. Some of these men had been on the glacier for 
five days, and during that interval had abandoned everything 
— guns, clothing, and food. The action of the fog seemed to 
be governed by the warm, moist air rushing in through Port 
Valdez from Prince William Sound, which, when striking the 
*Wheeler's Survey West of looth meridian, vol. W , p. 283, pi. 
LXVII, figs. 1-2. 
fBull. U. S. Geol. and Geog. Surv. Terr,, vol. IV, 1878, pp. 393, 394. 
^Extracted from "Rejjorts of Explorations in the Territory of Alas- 
ka" made under the direction of tiie Secretary of War, i8g8, No. XX\', 
Washington, July, 1899. 
