Annual Report.] : 176 [May 1, 
were then reviewed species by species, named, labelled, 
mounted and arranged in the gallery of the Shell Room. 
The duplicates were picked out and stored in boxes on 
the upper shelves. Very few originals were found, and 
very few even of those that Dr. Gould presented to this 
Society. By an arrangement with Mr. Anthony of the Mu- 
seum of Comparative Zoology, Dr. Carpenter'secured his ser- 
vices until all our fresh water bivalves, the Unionide, were ac- 
curately named, and Dr. Stimpson, of Chicago, who was visit- 
ing here, very kindly solved for him the equally difficult prob- 
lem presented by the Cycladidz. Besides his work on the 
bivalves, Dr. Carpenter also completed the Strombide, Cas- 
sidz, Dolia, V olutes, and the larger Cowries and Muricide, by 
adding to the Pratt collection of these families the species of 
our own collection which had not been mounted by Prof. E. 
S. Morse. 
This great mass of work which would have been the cred- 
itable result of a year’s labor on the part of any ordinary 
Malacologist, now fills the cases of the gallery, and the fami- 
lies just mentioned are in the floor cases. With the consent 
of the chairman of the Committee, the Custodian effected an 
exchange with Dr. Carpenter, receiving from him a first class 
set of British shells, in exchange for an equivalent series from 
our general collection of duplicates. This collection is es- 
pecially valuable, as we had no authentically named British 
shells, and these had been named by Dr. Carpenter, after 
the types of McAndrews, Bean, Jeffreys and others. With 
the land shells we also received a small lot of very rare Medi- 
terranean, and many of Tristram’s types from the Holy eae 
The whole amounts to about 414 species. 
Dr. Carpenter wrote me in full the details of the work 
done, and his letter is filed as usual, and can be referred to 
under the date of Aug. 21, 1871, No. 2863. During the past 
winter the same gentleman has been working upon our Uni- 
valves, a large portion of which was sent to him by Mr. 
Sprague. These have just been returned, and no formal re- 
