per or lower lobes; lying in the same plane with
them and standing out at almost exactly right angle.

_Terga_, flat; placed obliquely to the scuta, and barely half as long;
separated from them by nearly twice their own length; upper and lower
points acuminated; the umbo on the carinal margin forms a projecting
shoulder; the scutal margin is straight, they are separated by nearly
their own length from the apex of the carina.

_Carina_ narrow, very slightly arched, within slightly concave, both
points acuminated; lower third rather wider than the upper part; in
length equalling three fourths of the scuta, and longer by one third
than the terga; about as wide as the latter.

_Filaments, Cirri, and Mouth_ exactly as before.

In some specimens sent to me by the Rev. R. T. Lowe from off the
_Testudo caretta_, taken near Madeira, the scuta have their lateral
lobes broad and nearly rectangular: the carina extends nearly to between
the terga: the terga are nearly straight, somewhat pointed at both ends,
distant from the scuta, almost solid within, with their upper points
bowed outwards: the whole capitulum is bluntly pointed, as in the _var.
chenophilus_, to which form this makes a rather near approach.

C. VIRGATA, var. OLFERSII.

CINERAS OLFERSII. _Leach._ Tuckey's Congo Expedition.

_Hab._ South Atlantic Ocean.

_Scuta_, unlike on the opposite sides of the same individual, on one
side with a single lateral lobe as usual, but this very narrow, on the
other (fig. 2 _d_), with five lobes or projections.

_Terga_ slightly concave within, separated by a little more than their
own length from the tips of the scuta, and by one third of their own
length from the tip of the carina.

_Carina_ longer than the scuta by about one fifth or one sixth of its
own length, blunt at both ends, considerably bowed.

Again, I possess a group of remarkably fine specimens given me by Mr. L.
Reeve, from the southern ocean, (as I infer from a young _Lepas
australis_ adhering to them,) in which all the individuals, young and
old, are characterised as follows:--Scuta, with the lateral lobe
generally broad, but to a very varying extent, with the upper and lower
lobes extremely sharp. Terga separated from the scuta, by one and a
fourth of their own length, and by their own length from the carina;
somewhat acuminated at both ends, nearly straight, with a very slight
shoulder near the umbo. Carina equalling the terga in length, and about