Animal Meeting.] 
6 
[May 5, 
(1) A collection of 120 specimens illustrating a synopsis of 
the classification of rocks. 
(2) The systematic or lithological collection of rocks, amount- 
ing to 880 specimens. 
(3) The collection illustrating Structural Geology, which con- 
tains 275 specimens. 
(4) Considerably more than half of the Historical Geology. 
It is proposed, during the coming summer, to finish the Histori- 
cal Geology, and catalogue and arrange the Hew England rocks; 
but the important subject of Dynamical Geology must necessarily 
remain unrepresented until floor cases can be constructed, as there 
is now no space available for the somewhat bulky material illus- 
trating this branch of Geology. 
The principal accession to this department for the year consists 
of 400 specimens, contributed by Mr. Crosby from his collections 
made chiefly in the Southern States and Massachusetts. 
The collection which is to serve as general synopsis of the plants 
has been partially completed by Miss Carter. Each order and some 
sub-orders of plants will be represented by one species, which is 
mounted or framed and labelled appropriately. 
Ninety [90] specimens representing eighty-five [85] orders and 
sub-orders have been finished. The arrangement of the General 
Collection according to Bentham’s and Hooker’s Genera Planta- 
rum has been carried forward under the direction of Mr. Cum- 
mings, by Miss Carter, as far as the Endogens. The work of filling 
the vacancies in this collection is also steadily progressing. 
The department of Anatomy has been entirely rearranged so as 
to bring it into harmony with the rest of the collection in the 
Museum. 
The wall cases in room G are now filled by a synoptical collec- 
tion illustrating the type-characteristics and anatomical peculiari- 
ties of the different classes of Vertebrata prepared by Mr. Yan 
Yleck. 
A similar collection of Invertebrata will occupy the two floor 
cases, which have just been erected in the same room. These 
preparations are already partially collected together and can be 
moved into the cases as soon as they are finished. 
The osteological collection in the Main Hall remains very nearly 
