'^95-1 515 [Annual Meeting. 
MOLLUSCA. 
Mr. Edward W. Koper haying expressed a willingness to 
assist the Society by working upon this collection, the Curator 
asked him to take charge of the department. This gentleman 
accordingly began the classification, arrangement, and incorpora- 
tion of the Mayo collection of land shells, and succeeded in doing 
in a short time a large amount of work in this direction. All 
the Zonitidae and HeUcidae treated in Tryon's Manual of 
conchology, through Polygyra, have been assorted and lal>eled, 
with the exception of a few shells without name or locahty, and 
these are all now incorporated with the Society's collection. 
The remainder of the Mayo collection of Helicidae has also 
been labeled and arranged, but is not yet united with the 
Society's collection. The shells of the genera Cylindrella, 
Clausilia, Pupa, HeHcina, and most of the Buluni, have been 
assorted into genera, but the labeling has not been completed. 
It is a serious loss to the Society, as well as a matter of deep 
regret to his friends, that Mr. Roper's state of health is such as 
to 7Tiake it essential for him to seek a milder climate and give up 
this work which he had begun and conducted so rapidly and 
successfully and in which he was much interested. 
The Curator has spent most of his time, not occupied by 
routine duties, in the classification and arrangement of the rich 
oollection of Pectenidae in the Society's possession, redescribing 
the genera and grouping the forms in accordance with the law 
of bioplastology. A few specimens of rare species have been 
added by purchase to this part of the collection. A fine suite of 
the shells of Pteropoda has been purchased, and Miss Martin 
has prepared a series of colored drawings of the animals to 
accompan}" these shells. 
Worms. 
The specimens in this collection have been catalogued by Miss 
Marthi. A small but interesting collection of recent shells of 
Brachiopoda has been added In- purchase to this department. 
