Linncean Society. 
375 
Hooker’s elaborate ‘ Flora boreali-americana,’ we are now supplied 
with an accurate account of the plants of those parts of America in 
which the genera and species are most nearly allied to those of North- 
ern Europe. It is most interesting to observe the considerable num- 
ber of species which seem apparently correctly identified with those 
of Scandinavia and Britain, and we are much struck with the great 
number of European weeds which are naturalized in the United 
States. 
It is to be hoped that, now that this work is off his hands, its 
author will hasten the publication of the continuation of the ‘ Flora 
of North America,’ of which one complete volume and three parts of 
a second, extending to Compositce inclusive, have appeared from his 
pen in conjunction with Dr. Torrey. It is now five years since the 
last portion of that flora was published, and we can assure its authors 
that it is not without great anxiety that European botanists have 
been long expecting its continuation. 
In conclusion we can strongly recommend this Manual to all bo- 
tanists. It is published in London by John Chapman. 
In the Press. 
We are glad to learn that Mr. Ralfs’ beautiful work on that in- 
teresting tribe the Destnidiece, will be ready for distribution to the 
Subscribers in the course of a few days. 
PROCEEDINGS OF LEARNED SOCIETIES. 
LINN^AN SOCIETY. 
June 1, 1847. — The Lord Bishop of Norwich, President, in the 
Chair. 
Read a “Description oi Athalamia, a new genus oi Marchantie<E.” 
By Hugh Falconer, M.D., F.L.S. &c. 
Athalamia. 
Char. Gen. Flores masculil Capituli foeminei receytaculum nullum; 
foribus immediate pedunculo insertis, erectis. Involucrum nullum. 
hivolucella tubulos^, vertice bivalvia, basi inter se eonnata. Calyptra 
persistens, sub-bifido- lacerata. Sporangium in lacinias 4 v. 5 demum 
revolutas dehiscens ; pedicello elongate sub-exserto. — Frons simplex, 
V. radiatim 3-loba, crasse carnosa, subtus margiTie squamis foUaceis 
pluri-seriatis inslructa ; loins oblongis, concavis, margine attenuatis ; 
pedunculo pedicellisque crassis, succulentis, teretibus. 
Athalamia pinguis, Falc. 
Hab. 
The absence of a common receptacle and the erect flowers appear 
to be the most characteristic marks of the genus Athalamia, which 
is most nearly allied to Lunularia, Micheli, in the dehiscence of the 
sporangium and elongation of the pedicel. 
