68 Mr. Montagu's Description of Marine Animals 
was somewhat similar to that of the looper caterpillars, or larvae 
of the moths of the Linnaean division of Geometra*. 
There seems little doubt but this is the insect intended by Mr. 
Pennant under the title of Cancer Atomos, and which Gmelin has 
quoted for the Linnaean Atomos, although he expressly says it in- 
habits running waters. On this head Mr. Pennant is silent; at 
the same time quotes Baster s mirum animalculum in coralUnis, 
which is evidently marine. Gmelin quotes the figure given by 
Baster for the C. linearis, and expresses a doubt, after describing 
C. Atomos, whether it be distinct from the linearis. 
We have collated this matter as far as opportunity and the ob- 
scurity of the subject will permit, and have scarce a doubt but 
that the linearis and Atomos of Linnaeus are the same; and that 
the figures given by Pennant, Baster, and Pallas are to be referred 
to for the insect in question ; and though by no means correct, 
there is sufficient character to induce us to believe that these are 
our C. Phasma. 
It may seem strange to bring together two insects that are said 
to inhabit such opposite places as fresh and sea water : such mis- 
takes, however, may be found in other parts of the System of 
Nature, and are strongly marked in the same genus ; the C. Pule.v 
and C. Locusta have been confused by an erroneous supposition 
that both occasionally inhabit fresh as well as salt water. 
Whoever will take the trouble to compare our figure with those 
above quoted, will find all the appendages to the body corre- 
spond, except the pair of minute palpi close to the mouth, which 
those figures want ; and that no tail is to be found in ours. Some 
allowance, however, must be made in figures of microscopic ob- 
* Some are destitute of spines on the body and arms_, and differ somewhat in the for- 
mation of the latter 5 besides having that part extremely tomentose, 
jects, 
