animal, nearly allied to the _Diphyes_, the
soft part of the body, which contains the tube for receiving
nourishment, having no air-bladder. Fourthly, a small _Beroe_, having
the power of drawing in its fins. Fifthly, a very small _Porpita_. The
sixth animal was a very remarkable crab, the triangular shell on the
back, only two lines in length, provided with a spike from eight to ten
lines long, (_Lonchophorus anceps_,) projecting both before and behind.
Professor Germar has given to a species of beetle the name
_Lonchophorus_, but the same had already been described by Mac Leay,
under the name of _Phanaeus_. Seventhly, an animal belonging to the class
_Arthrodiae_, (_Arthronema N._) the exterior consisting of stiff tubes,
in the interior of which is afterwards found a skin, which eventually
divides into separate parts. Eighthly, a _Clio_, about a line in length,
with a projection from the globular part of the body. Ninthly, a second
variety of _Appendicularia_, described by my friend and companion, on
board the Rurik, A. von Chamisso, in the tenth volume of the _N. Acta
Acad. Leop. Car._, which proved to be a species of Mollusca belonging to
the Heteropodes of Lamarck. Tenthly, a _Pelagia_, scarcely, if at all,
to be distinguished from the _Panopyra Per._ Lastly, a new kind of
_Cestum_, _C. Najadis N._

In the thirty-fourth degree of latitude, renewed calms again enabled us
to add to our collection, firstly, a new species of Physsophorides
(_Agalma N._); secondly, a new _Diphyes_; thirdly, a new _Pelagia_, with
a yellow skin on the belly, attached to which was a small Cirrhipede of
the class _Cineras_; fourthly, a Medusa, with broad belly-bags, and four
strong fins; fifthly, a Medusa of the same species, with five and six
fins; sixthly, a very small Entomostracea of a flat form, and
distinguished by its blue glossy colour, similar to that of the _Hoplia
farinosa_; seventhly, a _Loligo_, probably _cardioptera Per._,
remarkable on account of the largeness of its eyes; eighthly, a second
species of _Phyllirhoe_, placed by Lamarck among the Heteropodes, to
which class it does not, however, belong. The species found in the South
Sea has no eyes, and plain feelers; on which account it was formerly
considered by us as forming a distinct class, and called _Eurydice_.
But, although the _Phyllirhoe_ is found to vary so remarkably in its
formation, owing to the want of feet, still I consider it as nearly
allied to the _Eolidia_.