PROCEEDINGS OF SOCIETIES. 
163 
Under tlie head of donations to tlie cabinet, Mr. C. G. Ewing 
presented a slide mounted with a colony of polyps, Sertularia, in 
glycerine, from San Pedro Bay. 
Colonel C. Mason Kinne donated five slides, mounted by him, 
comprising the elytron of a beetle, showing very marked peculiari- 
ties ; raw cotton from near Visalia, Cal. ; scale of salmon ; raw cotton 
from New Mexico ; and white horse-hair ; the three last named being 
mounted in balsam, for the polariscope, and which proved worthy 
objects for observation with that accessory. Colonsl Kinne exhibited 
some living protococcus, which vegetable, moving freely in the same 
drop of water with the animal forms ParamoBcium vorticella and others, 
aided to show how nearly the two great kingdoms are aJlied in the 
so-called lower forms of life. 
Dr. Eisen exhibited the tentacles of a barnacle (lepas), and a 
variety of marine algae {ulva). 
An adjourned meeting was held at the rooms of the Society on 
Thursday evening, April 8, with a full attendance of members, 
Mr. H. Edwards, honorary member. Dr. A. Barkan, Dr. Geo. H. 
Powers, Dr. A. P. Hayne, Prof. Wm. H. Brewer, and Messrs. S. 
Heydenfeldt, jun., Chas. E. Case, Sam. B. Christy and B. B. Bedding, 
were present as visitors. 
Messrs. Wm. A. Woodward and W. F. Myers were elected 
resident members. 
The Society was also the recipient of a valuable gift from Dr. J. 
N. Eckel of this city, in the work of his distinguished countryman, 
Ehrenberg, on microscopic geology. It is truly a great work — one 
now very rare — embodying the results of the life-long labour of one 
of the most celebrated scientists of the age on microscopic research, 
illustrating the microscopic marvels of earth and ocean, as found in 
various parts of the world, in a series of large and beautifully coloured 
plates, with all that perfection of detail for which the German 
engravers are so justly celebrated. The Society may be congratulated 
on the acquisition of so valuable an addition to its library. 
The following was unanimously adopted : 
Resolved, — That the thanks of the San Francisco Microscopical 
Society be tendered to Dr. J. N. Eckel of this city, for his magnificent 
and valuable donation of Ehrenberg's ' Mikrogeologie,' and that the 
trustees be authorized to extend to Dr. Eckel the courtesies of the 
rooms and apparatus, with a cordial invitation to use them at his 
pleasure. 
Under the head of donations to the cabinet, Mr. C. D. Gibbes 
presented a portion of a nest supposed to have been made from wild 
hemp ; a sample of hard-pan, twenty-one feet below the surface of 
the ground, and a fungus found on wild rose, all from Middle Eiver, 
San Joaquin. 
Dr. Gustaf Eisen presented four slides, mounted by him with 
fresh-water algse, palate of Physa radula, pedicellarium of echinus, and 
sphoeridium of echinus. Dr. Eisen explained the position and forma- 
tion of the latter, using the black-board, and stated that it was con- 
sidered the organ of taste in the well-known sea-urchin. 
Mr. Hanks called attention to a sample of infusorial earth in the 
