﻿lfjfi ( 'tHfi/mtt/i Social ij of Xolural History. 



hollow, and the " engine-turning'' arrangement of the plates is the Same, 

 I propose that in the future Aiwmaloiilts nticulatus be placed in the genus 

 to which it properly belongs, and be know n as Rr.< i kj \cri.m-> 10 n< i 



latus, Ulrich. 



Mr. Geo. 15. Twitchell spoke of the Flora of the Tyler-Davidson 

 fountain and was requested to prepare a report for the next meeting. 



Donations were announced as follows: from Dr. J. A. Henshall, 

 "Book of the Black Bass;" from J. Kelly O'Neall, tooth of Ekphas 

 Americanus ; from Director of U. S. Geol. Survey, Vol. VII of Mono- 

 graphs; from Smithsonian Institution, Vols. 24 and 25 "Contributions to 

 Knowledge;" from Col. Chas. Whittlesey, two pamphlets; from Chief 

 Signal Officer, Monthh Weather Review. May 1S.X5: from Persifor Fra 

 zer, one pamphlet: from Bureau of Education, one pamphlet; from U. S. 

 Nat. Museum, " Proceedings," Vol. VIII, Nos. 12 to 18; plates 1 to 14; 

 from W. Shepard, one Indian stone ax; from ('has. Dury. Black Snake 

 in alcohol and specimens of Cicnla \< ■•/■/, ■///./< v/>// / from J. Mickleborough, 

 specimen of Orcttster gigas, 



Meeting of September i, 1X85. 

 President Harper in the chair, and fifteen members present 

 The following papers were read and referred to the Publishing Com- 

 mittee : 



THE LIFE IN THE TYLER DAVIDSON FOUNTAIN, 

 r>\ Geo. B. Twitchell. 



On the evening of our last meeting, in passing the Fifth street foun 

 tain, I noticed an Alga growing in great abundance about the edge of the 



basin. 



The unusual circumstances under which the plant was growing led 

 me to make an examination. I collected a small amount'and this, under 

 the Society's microscope proved to be so full of life of all kinds that it was 

 thought a full account might prove of interest. This work was given to 

 me. For the past month, with the aid of other members of the Society, I 

 have made observations on this life. These I now offer to the Society. 



The collections were almost all made from the large basin and from 

 a small basin under one of the drinking founts. The others yielded but 

 little of any interest. It is quite a noteworthy fact that the faunae and 



