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and other distinguislied microscopists. There is also a yoI- 

 ume of microscopic memoranda, containing many valuable 

 notes, and not less than 3,000 sketches, highly valuable as an 

 illustrative accompaniment to the microscopical collection, 

 and a large number of scientific letters containing many 

 valuable scientific facts, well worthy of publication. The 

 rough material has been carefully catalogued by the Curator, 

 and numbers 534 lots. The process of re-cataloguing and 

 an-anging the mounted specimens to accommodate them to 

 the indicators now in use has been undertaken by some of 

 the members of the section, and is progressing favorably. 

 The only other collection in this department worth mention- 

 ing is that purchased of the heirs of Dr. W. I. Burnett, con- 

 taining his collection of Acari and other mounted objects, 

 numbering in all about 600 slides, many of them with a 

 number of specimens on each ; about 400 of them are animal 

 parasites and the remainder miscellaneous objects such as 

 minute animal organisms, hairs of different animals, etc. 



In the Vestibule is displayed the principal portion of the 

 Society's collection of fossil foot-prints, brought together 

 mainly by the late Mr. Marsh and purchased after his death. 

 It is of considerable size and contains many slabs of great 

 magnitude, some of them the finest known, which are of 

 special value in exhibiting the measure of the stride of the 

 paradoxical animals whose impress they bear, as well as in 

 giving one an idea of the abundance of hfe on the ancient 

 shores of the Connecticut ; one important addition has been 

 made during the past year in a slab containing the track of 

 the Cheirotherium from Sort on Quarry, near Liverpool, for 

 which we are indebted to George Moore, Esq., of the Liver- 

 pool Free Museum and Capt. Anderson of the Cunard 

 Steamship China. Another imj^ortant and exceedingly in- 

 teresting donation the last year has witnessed, is the origi- 

 nal cast in sandstone of bones of one of the animals which 

 formed these tracks upon the sandstone of the Connecticut 

 River, almost the only important remains of this nature 

 which have yet been discovered, rescued by Prof W. B. 

 Rogers fi'om the Government edifice at Newport, into which 



