Bibliography. 391 
13. London Microscopical Society.— Reports of the first and second 
anniversaries of the Microscopical Society of London, held on the 15th 
of February, 1841 and 1842, at the Society’s rooms, No. 21, Regent St. 
This society was founded on the 15th of February, 1840, and has 
held the two anniversary meetings, the reports of which are now before 
us. The increase of microscopic observers, and the opening of so 
many new fields of observation, attendant principally on the labors of 
Ehrenberg and Owen, rendered the establishment of such a. society 
a legitimate and desirable object, and it has not been found to clash 
with any previously organized scientific body for other objects. 
On the contrary, numerous papers have been read before it and will 
appear in its Transactions, which would probably not have seen the 
light except for the connection of the authors with this society. A 
cabinet of microscopic objects has been begun, which already contains 
nearly seven hundred specimens; and it is intended that the Society 
shall also become the possessors of a full set of all the most esteemed 
forms of microscopes, made expressly for them as samples of the best 
performance of the most celebrated makers both in London and on the 
continent. The formation of a library of microscopical works is also 
a primary object of the Society, and this part of the plan has been be- 
gun by the purchase of Ehrenberg’s “ Infusions-Thierchen,” and nu- 
merous other valuable publications. The proceedings of the ordinary 
meetings are published regularly i in the Microscopic Journal, conducted 
by Mr. Cooper, which is the authorized organ of the Society. The 
hundred and eighty five; the number of papers read the last year, 
fifteen ; the publication of some of the earlier papers is in progress, 
and a part of the Transactions will soon be ready for distribution. 
14. A Monograph of the Limniades, or fresh-water univalve shells 
of North America. By S.Srenman Hatpeman, Member of the Acad- 
emy of Natural Sciences, Philadelphia, &c. No. 5. Phila. July, 1842. 
We have previously noticed Mr. Haldeman’s undertaking in a favor- 
able manner. ‘The fifth number of his Limniades has been received 
a om contains figures and descriptions of fourteen species of Lim- 
. carperata, solida, columella, macrostoma, humilis, Buli- 
soidie 2, pallida, vitrea, obrussa, ferruginea, gracilis, glabana, decol- 
lata, palustris 
The steals of this work are on copper, by Alex. Lawson, 
drawn and colored by Miss Lawson, and are so perfect as — to 
pate poans to be desired. 
