210 ANNUAL EECORD OF SCIENCE AND INDUSTRY. 



of August. In the Bay of San Diego the collections were 

 largely increased. Here, and, indeed, all along the coast from 

 Valparaiso northward, were found many specimens of ceta- 

 ceans and selachians. A large number of cestracions alone 

 were secured. Leaving San Diego on the 25th of August, 

 the expedition reached San Francisco on the 31st, and, though 

 the voyage ended here, Professor Agassiz remained in San 

 Francisco for some weeks, for the purpose of completing col- 

 lections formerly made for him in this region. Both there 

 and in Sacramento, with the aid of friends, he succeeded com- 

 pletely in his object. 



It would be impossible at present to give more than a very 

 vague and imperfect idea of the extent and value of the col- 

 lections derived from this voyage, as the work of unpacking 

 has but just begun. The number of barrels and cases, how- 

 ever, forwarded to Cambridge during the ten months' absence 

 of the voyagers was 265 almost a barrel a day. It would 

 have been simply impossible to have collected on this scale 

 but for the cordial assistance rendered the explorers by the 

 captain and officers of the ship, and, under their direction, by 

 the men, who were always cheerfully ready for the work of 

 the seine and dredge. Dr. Hill and Dr. White, physicists of 

 the expedition, when not engaged in their own duties, were 

 prompt to assist in every way. Dr. Hill made also a valua- 

 ble and admirably -preserved collection of marine plants, 

 gathered at every anchorage where time was allowed for 

 landing. All details respecting the special work of the chem- 

 ical and physical departments under the charge of Dr. Hill, 

 ex-president of Harvard, and Dr. White, of Philadelphia, can 

 be obtained by application to these gentlemen, or to the 

 Superintendent of the Coast Survey. 



Professor Agassiz's special party for zoological work con- 

 sisted of Count Pourtales, Dr. Steindachner and Mr. Blake. 

 Count Pourtales, while sharing in all the general work of the 

 expedition, had especial charge of the dredging operations. 

 Dr. Steindachner, although an admirable collector in all de- 

 partments, was especially engaged in the care of the ichthy- 

 ological collections. His great knowledge and untiring in- 

 dustry made his assistance invaluable ; indeed, without him 

 the comprehensive scheme for collecting which had been 

 planned could not have been carried out. Mr. Blake had 



