Aniu.al Meeting.] 514 [May i, 
Professor Crosl)y and .Aliss IJallard liave also (•ollcctt'd the 
recent fossils from the Charles lliver Hats now being excavated on 
the easterly side of Harvard Bridge. Between thirty an(i fifty 
species were found, and a few of these had not been mentioned 
in Upham's " Recent fossils of the Harbor and Back Bay, Boston " 
(Proc. Bost. soc. nat. hist., vol. 25, 1891). 
Miss E. D. Boardman has continued her lal)or upon the Cura- 
tor's collection of Quaternary fossils of Planorbidae from Law- 
ler's Lake, and has about finished the preliminary and rather 
uninteresting work of sifting the samples of earth and clay from 
the different layers and picking out the shells. 
Miss Ballard has mounted and catalogued all the new materials 
for the Lower Silurian and finished the revision of the exhibition 
collection for the Trenton and Hudson River groups. She has 
worked over all the materials of the Medina, Clinton, Niagara, 
including the Guelph, Salina, and Lower Helderberg groups, thus 
completing the Upper Silurian. This includes the mounting of 
selected specimens for exhil)ition, the arrangement f)f the stored 
materials, and the picking out of duplicates. Similar work on 
the Oriskany fossils has also been completed. The same assis- 
tant has also worked over the Hyatt collection through the 
Lower Silurian, picked out materials suitable for exhibition, and 
incorporated the remainder with our other collections. 
PORIFERA. 
Considerable work has been done u])on this collection by the 
Curator assisted by Mrs. Flint, in securing the safety of the 
material with rubber corks and jjroper glass-stoppered bottles, and 
in comi)leting the arrangement of the stored specimens. All of 
the stored materials underneath the exhibition cases have been 
reviewed, cleaned, and catalogued by Mrs. Flint. 
ACTINOZOA : ECHINODERMATA. 
The storetl specimens have been insi)ected and catalogued l)y 
Mrs. Flint. 
