670 NATURAL HISTORY MISCELLANY. 
duced the species. Planorbis dilatatus, however, does not occur in cotton 
growing regions, and therefore some other explanation must be made for 
ts importation into England. ely, Mohan tentaculata, peculiar to 
Europe, has been found in d sil nity of Montreal. Whether these 
cial intercourse, or are really cireumpolar species which have thus far 
eluded the collector’s eye, must be decided soit — for the species in 
various and widely separated regions of the country. 
* ZooLoGicus” has succeeded in misconcei ving some very plain state- 
ments and in supplying some imentary zoólogical informatio 
which perhaps no reader of the *:lilies " has felt the need of. he parallel 
drawn in the “lilies” is corre The hexagonal form results in micro- 
crystal it results from the aggregation of hexagonal particles. The other 
misconceptions of bo timo ” are so peculiarly his own that they need 
not be noticed. — CHEM 
THE SEUM O PO iUd ZoOLoGy is prepared to furnish exten- 
sive collections of all the rocks and loose deposits found upon and about 
fresh and well preserved specimens, in exc ange for recent and fossil 
corals from other parts of the world. spend lg denne Director of 
the Museum of Comparative tio: Cambridge, Mc 
Proressor AGassiz.— “ Our Young Folks” for — contains the 
best portrait of Professor Agassiz that we havé ever seen, and we advise all 
who have not seen him, and wish to know how he looks, to send twenty 
cents to Fields, Osgood & Co., Boston, for a copy of the number, which 
also contains ** A Sketch of. the Life of Professor Agassiz." 

OBITUARY or MICHAEL Sars.— We have received a circular from the 
Royal University of Norway, announcing the death of Professor Michael 
, ê NES i 
quently presided succession over the parishes of Bergen and Manger. 
His theological ca eer appears to have been adopted merely as a means 



conferred upon him the precious boon of Misa study. 
The | life of this eminent Norwegian is full of encouragem to many 
- naturalists, many of whom are located, as Sars was call 1854, 
ar from books or r museums, and obliged to work out their investi- 

