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POPULAR SCIENCE REVIEW. 
if, on the other hand, it is dry, it will remain distended to its natural size 
and appearance. To prevent the head from being extended too much, dry 
all the body except the first and second segments, take the larva away from 
the spirit-lamp, and press the head into its natural position, afterwards 
drying it at some distance from the flame, without blowing through the 
tube. If the larva require colouring (as almost all green larvae do), some 
very finely powdered dry colour (rather darker than the original colour of 
the larva) must be introduced into the skin after it is thoroughly dry. To 
get the colour evenly on the inside of the skin, it must be rolled about in 
the hand. In order to direct the heat on to any particular place, a small 
hole (about the size of the head of a pin) should be made in the centre of 
the piece of zinc. This vfould be found to be particularly useful, when 
finishing the head of the larva, as above described. The object of having 
the glass tube bent is that the head is then above the level of the flame ; 
and the bulb is to prevent any moisture from the mouth running down the 
tube into the inside of the larva. I generally put a piece of blotting-paper 
in the mouthpiece of the tube. 
A Crocodile in America. — Elnstitut of March 23 announces the discovery 
in America of anew species of crocodile, differing from C. acutus and C. rhom- 
bifer found in Cuba. Professor Jeffries, who founds the new species on a 
skull given him by the person who killed the animal on the banks of the 
Miami, has given the measurements of the bones in detail. 
Animals Eaten in Calabar . — At a recent meeting of the Zoological Society, 
some food curiosities were illustrated by Mr. Andrew Murray, who laid be- 
fore the members specimens of edibles sold in the markets of Old Calabar. 
Amongst them was a fruit-eating bat ( Pteropus ) ready trussed for cooking, a 
crustacean rare in naturalists’ eyes ( Callianassa Tui'nerana'), and the larva of 
a beetle found in the trunks of decayed palm-trees. 
The Zoological Record and the Land Snails of New England. — At one of the 
last meetings of the Boston Society of Natural Science, Mr. Edward S. Morse 
called attention to a statement in the Zoological Record concerning a series 
of articles by himself on the Land Snails of New England, in which the 
reviewer remarked that he had returned to the system of Lamarck and 
Pfeiffer in the classification of these animals. The articles in question 
being published in a popular magazine were necessarily rendered as simple 
as possible, and divested of all technical details, and on this account only 
the earlier nomenclature was used. Mr. Morse disclaimed the intention of 
abandoning the position he had previously maintained, that these animals 
were divisible into natural groups by the structural peculiarities of the 
principal parts of the animal, such as the character of the lingual mem- 
brane, the form of the buccal plate, &c. While in general he had followed 
Albers in these subdivisions, he felt that he could not have adopted all of 
his genera without open violation to the natural characters of the animal, 
and though strongly tempted to follow the example of other systematists 
and include extra-limital species in the new genera proposed, had refrained 
from doing so, since he had had no opportunity at that time of going fully 
into the matter. 
An Australian Fossil Crocodile . — Professor Owen ha9 recently received, 
with remains of JJiprotodon , etc., from the lacustrine deposits, Darling 
