756 The American Naturalist. [September, 
ville map and section sheet and the accompanying report have been 
printed and will soon be ready for distribution. 
During the past month, arrangements have been perfected for intimate 
cooperation between the World’s Fair Commission and the Geological 
Survey, such that the material accumulated and the great amount of 
knowledge acquired by the latter organization concerning the geology 
and the mineral deposits of the State will be applied in the interests of 
the prospective exhibit in Chicago. The plans adopted and the 
progress already made in the execution of these plans yield abundant 
promise that the display in this department will be of the greatest 
possible credit and advantage to the State. 
The Pacific Cable Survey.—The United States steamer Thetis 
has been making a second survey for the proposed cable between San 
Francisco and Honolulu, and met with far greater success than was 
had in the first survey, made by the steamer Albatross six months ago, 
when the line of survey was from a point on Monterey Bay, direct to 
Honolulu. The Thetis made a start from Point Conception, 220 miles 
south of San Francisco and thirty-eight miles west of the town of Santa 
Barbara, and at the head of Santa Barbara channel. At the point 
there is high ground and the water shoals off on a mud bottom. As a 
landing place for a submarine cable everything is favorable. The 
course taken by the Thetis was nearly due southwest and by way of the 
great circle. Soundings were made every two miles until 900 fathoms 
was reached. As the steamer proceeded toward the Hawaiian islands 
the depth of water gradually increased until 3000 fathoms was averaged 
for miles. Soundings were taken at intervals of ten miles where the 
bottom was found of a level nature and where irregular or undulating 
at distances down to half a mile. The greatest depth reached was 3228 
fathoms when about 300 miles from Hilo on the island of Hawaii, 
which is marked as the landing-place at the islands. Thirty-five miles 
from Hilo the water shoaled to 1000 fathoms, and from that gradually 
on to twenty fathoms. There is more water at Hilo than at Point 
Conception. The island of Hawaii is about 200 miles southeast of 
Honolulu and can be connected by a short cable. By the Thetis 
survey the cable will run 2060 miles. The Albatross survey is about 
fifty miles longer, but not quite as practicable owing to the bottom of © 
the sea being very irregular over a greater part of the first survey. 
Fourth Note on the Dinosauria of the Laramie.—Previous 
notes on this subject have appeared in the Naruraxisr for 1888 p- 
1108; 1889 p. 715; and 1889 p. 904. In the present communication 
