195 



In three boxes are Fossil Diatoms from Virginia and Mary- 

 land ; Bermuda ; Monterey, California ; Suisun Bay, &c. 



Nearly all the specimens in the above boxes were mounted by 

 Prof. Bailey ; and they are accompanied by manuscript cata- 

 logues, or by memoranda on slips of paper, in which the posi- 

 tions of more than three thousand individual objects on the slides 

 are noted with reference to Bailey's Universal Indicator for 

 Microscopes ; thus enabling the actual specimens described by 

 him to be readily found and identified at any future time. A 

 part of the Collection is also accompanied by an alphabetic cata- 

 logue of species, with references to the slides on which speci- 

 mens may be found. 



Two boxes contain recent and fossil Vegetable Tissues ; and 

 two others Test Objects and miscellaneous Organic Bodies, and 

 a micrometer scale on a glass slide. 



The number of glass slides in these twenty-one boxes is five 

 hundred and fifty. 



In addition to the selected specimens in the Microscopic Col- 

 lection, there are more than eight hundred specimens mounted 

 on glass slides, comprising many duplicates of those in the Col' 

 lection, and a variety of miscellaneous microscopic objects. 



There are also two hundred specimens of Polythalamia 

 mounted as opake objects and labelled. These are not dupli^ 

 cates of the Polythalamia in the Microscopic Collection, which are 

 in Canada balsam. 



A very valuable portion of the bequest consists of the original 

 specimens of microscopic material, collected by various scientific 

 and exploring expeditions, and an extensive series of specimens 

 received from European correspondents, including Ehrenberg 

 and other distinguished microscopists. 



Among the miscellaneous objects are three microscopic daguer^ 

 reotypes, seven photographs on paper, nineteen drawings of 

 microscopic objects, and two micrometer scales on small slips 

 of glass. 



II. The Alg^, &c. Dr. Durkee's Report, (B.) 

 These are contained in thirty-two portfolios. They are from 

 almost every part of the globe, They are arranged and named 

 in a manner to afford great ^.ssistance to the student, \yho m^y 



