ithout
transverse striae, which, I believe, enter the short limbs, but not the
abdomen, as I infer from the latter not being everted when they are
pulled. At their lower ends these muscles terminate abruptly, and from
being contracted are often a little enlarged. They extend a short way
beneath the lower pair of limbs, and are, I suspect, attached to the
outer integument of the animal, near the base.

After the most careful dissection of very many specimens, and their
examination in many different methods (as by caustic potash, &c.), I can
venture positively to assert that there is no vestige of a mouth, or
masticatory organs, or stomach: I did not see any anus, but I will not
affirm that such does not exist.

In the upper part of the animal, lying under the superficial muscles,
and close beneath the upper line of their attachment, I found in all the
specimens, an eye, of a pointed oval form, rather less than 11/12,000ths
of an inch in diameter, formed of an outer capsule, lined with purple
pigment-cells, and surrounding, as it appeared, a lens. The eye is not
introduced in fig. 9, for I could not see it, except by dissection, and
therefore do not know its exact relative position.

_Generative System._--The contents of the animal, between the sack
containing the thorax and the outer integuments, and directly under the
thorax, varied much in condition: in young and lately attached specimens
the whole consisted of a pulpy mass with numerous oil-globules; in other
specimens, apparently more mature, there were vast numbers of cells,
sometimes cohering in sheets, about 3/10,000ths of an inch in diameter,
and having darkish granular centres; these I believe to be the testes,
for in a specimen presently to be mentioned, in which the vesicula
seminalis was gorged with spermatozoa, I found adhering to its outside,
a mass of cells of exactly the same diameter, but now empty and
transparent instead of having brownish centres. Lastly, in several other
specimens, at the very bottom of the sack-formed animal, there was a
brownish, pear-shaped bag, of different sizes in different individuals,
and occasionally broader even than the thorax. This bag contained either
pulpy matter, or a great mass of spermatozoa. Before being disturbed,
these spermatozoa lay parallel to each other in flocks, and they yielded
to the needle in a peculiar manner, so that I found (having had
experience with these bodies in living Cirripedia) I could almost