THE NAUTILUS. 59 
September, 1893, p. 58] issued by the Academy has been completely 
achieved. This result is the more gratifying in view of the predictions of 
failure freely expressed when your Committee entered upon its labors. It 
would, of course, be presumptuous to claim that the Academy’s endeavors 
have been more than one of the factors in this achievement, but in such 
an international matter every such factor is of great importance. 
It may not be amiss to add here, for the benefit of our readers, 
further extracts from the above quoted Convention of the Univer- 
sal Postal Union contained in Mr. Brook’s Report pp. 27 et seq. 
“ Packets of samples of merchandise may not contain any article having 
a salable value; they must not exceed 350 grams [12.35 Avoirdupois ounces] 
in weight, or measure more than 30 centimetres [11.8 inches] in length, 20 
centimetres [7.87 inches] in breadth, and 10 centimetres [3.93 inches] in 
depth, or, if they are in the form of a roll, 30 centimetres [11.8 inches] in 
length and 15 centimetres [5.9 inches] in diameter.” (chap. i, art. 5, sect. 5). 
“Tt is forbidden: First, to send by mail: (a) sample and other articles 
which, from their nature, may prove dangerous to the postal employees, soil 
or injure the correspondence; (4) explosive, inflammable or dangerous sub- 
stances, animals and insects, living or dead, excepting the cases provided for 
in the Regulations of detail.” * (chap. i, art. 16, sect. 3). 
The conditions which must be observed for the transmission of samples of 
merchandise remain as before—the packages to admit of easy inspection, not 
to “bear any manuscript other than the name or the social position of the 
sender, the address of the addressee, a manufacturer’s or a trade-mark, 
number of order, prices and indications relating to weight and size, as well as 
to the quantity to be disposed of, or those which are necessary to precisely 
indicate the origin and nature of the merchandise,” while articles of giass, 
liquids, oils, fatty substances and dry powders must be packed to prevent 
their damaging, or escaping into, the other contents of mails (chap. iii, art. 
xvli). 
*The ‘“ Regulations of detail and order tor the Execution of the Convention”’ form 
chapter iii, from which the most important—to naturalists—of our preceding quotations 
is taken. 
GENERAL NOTES. 
SHELLS oF REDpING, SHasta Co., CaLtirorniA.—Mr. Richard 
C. McGregor, one of the enterprising ornithologists of California, has 
been so good as to collect some mollusks at Redding, on the Sacr- 
mento River, for the Academy of Natural Sciences. He found a 
specimen of Polygyra Roperi, of which only the original three exam- 
ples found by Mr. E. W. Roper have been known hitherto. The 
discovery of “ Ancylus” patelloidea Lea, living and abundant, is the 
most important find. The list is as follows: 
Epiphragmophora mormonum Pfr., one young ‘specimen. 
Polygyra Roperi Pils. One specimen. 
