316 NOTES. 
erations of habits of growth, and environments. Those contain 
in gelatinous envelopes should be less developed in strength of 
shell and bracing. Those growing on algze and in exposed local- : 
ities should be strong to resist fracture. On those moving free 
the bracing would be in proportion to the weakness of the shell; 
larger shells being relatively more liable to be broken. Here as 
elsewhere nature without waste of material combines utility with 
beauty.—G. W. MOREHOUSE. We 
Uxmountep Ossects.—At the request of a number of micros 
copists, Mr. Jno. H. Martin, of the Maidstone Micro-assay Lab 
oratory, has decided to establish an agency in this country for the 
distribution of his well-known unmounted objects. Persons desir- 
interesting materials at a tery small cost. A stock of objects will 
be kept for immediate distribution, and articles that may be out 
of stock furnished as soon as they can be obtained from abroad. 
Lists and objects can be obtained by addressing, by post, C. T 
Barpowix, Troy, N. Y. 
NOTES. 
A RARE opportunity is oat botanists or scientific institutions 
of purchasing the cryptogamic herbarium of Dr. Duby (author ¢ 
Botanicon Gallicum, ete.), containing the cellular eryptogams 
of all families except the mosses. a 
This collection contains first, in eighty-five packages, the hel 
barium of Dr. Wallroth, and includes all the species discov re 
by this savant and published in his “Cryptogamia Germanies 
also that of Nees von Esenbeck, containing the eryps* 
species of the different families (except the lichens and Hepa 
icæ, which will be mentioned farther on), including a large ? 
ber of fungi (among others almost all the species of Schwer 
algæ, etc., ete. Besides these are eighty large packages +, 
ing the fungi either gathered or received by himself. Among 
number are found the Hypoxyla in perfect order, enriched 
authentic specimens from Fries, Montague, F iickel, Ber 
Currey and Bischoff, perfectly named by them. In these P 
ages are found, among other things, the Lyeoperdinei, H ge 
Uredines, Mucedines, ete., described in his “Botanicon,’ 
publications. exotic fungi the herbarium contains 
ee 
7 a 
