\ 
Cancer flagnalis of Linneus. 109 
large concave cales, placed perpendicularly, and furnifhed with toothed 
edges, meeting each other. It is from each fide of this mouth that 
. the trunks proceed. The ‘particular ftruéture of the trunks is as 
follows. The body of each is a long and moderately broad flat part, 
extended in a ftraight line when expanded, and ending in a jagged 
extremity, befet with very fharp teeth, like thofe of a fifh : it is alfo 
divided, from the root to the extremity, into a very great number of 
tranfverfe fpaces, each of which terminates in a tooth at the edge; fo 
that the whole trunk is edged on both fides with a continued row 
of teeth. Befides the teeth, each trunk is alfo furnifhed with three 
lateral branches, or appendages, fituated at fome diftance from each 
other, on the outward edge of the trunk. Thefe lateral branches are 
armed near the ends with feveral very ftrong and exceflively fharp 
teeth, not only on the edge, but on the furface itfelf, and on the tips. 
Laftly, it muft not be omitted that the bafes of the fangs them- 
felves are furnifhed with a double range of extremely fharp teeth, 
of a much larger fize than any of the others: they are placed in fuch 
a manner that the points of the teeth of one range look exaétly 
contrary to thofe of the other; and by this means muft enable the 
infe& to commit the moft fevere depredations on fuch animals as are 
. its deftined food. But why the female fhould not be provided with a 
fimilar apparatus, is an enquiry not eafily to be anfwered. 
The figure marked No. 8, is an exact fketch of the whole appa- 
ratus of the mouth, expanded and magnified; in which the fet of 
teeth at the bafe of each of the hooks of the fangs, is very confpi- 
cuous. The upper part of the real maxillz, or toothed fcales, com- 
pofing the mouth, is alfo feen; and the trunks, with their lateral ap- 
pendages, are reprefented in their relative proportions. 
It is probable that the extremities of the fangs are tubular, for at 
the tips there is an appearance of a narrow opening; but of this I 
cannot fpeak with certainty. 
| ee My 
