* * *

Mr. J. E. Gray, in 'Proc. Zoolog. Soc.,' 1848, p. 44, quotes a
description by Stroem ('Nym. Saml. Danske,' 1788, 295, n. iii, f. 20),
namely, "_Lepas testa compressa 7-valvis, stipite lamellosa_." It is
found attached to _Gorgonia placomus_, in the North Sea. I suspect that
this is the common _Scalpellum vulgare_, and that Stroem counted the
valves only on one side, overlooking the rudimentary and concealed
rostrum; and this would give seven for the number of the valves. Had it
not been for the expression "stipite lamellosa," I should have thought
this might have been an unknown species of Dichelaspis.

SCALPELLUM LAEVIS. _Risso._ Hist. Nat. des Product. de l'Europe
Merid., 1826, Tom. iv, p. 385.

The chief characteristic of this species appears to be indicated by its
specific name. It is found in the Mediterranean, attached to Cidarites.
I am inclined to believe that it is distinct from _S. vulgare_.

SCALPELLUM PAPILLOSUM. _King._ Zoolog. Journal, vol. v, p. 334.

Captain King has described this species, taken from the depth of 48
fathoms, on the coast of Patagonia, in Lat. 44 deg. 30' S. It is probably
distinct, but is so imperfectly described, that not even the number of
the valves is given.

POLYLEPAS (POLLICIPES), Sinensis. _Chenu._ Illust. Conchyliolog.,
Pl. II, fig. 7.

This species is said to come from China; it is nearest to _P. spinosus_,
but is, I think, distinct.

EXPLANATION OF THE PLATES.

TAB. I.

Fig.

1. _Lepas anatifera_, (nat. size.) _Var._, with a row of square,
dark-coloured marks on the scuta and terga.

1_a._ _Lepas anatifera_, external view of carina, magnified
thrice.

1_b._ _Lepas anatifera_, lateral view of carina, magnified thrice;
var. _dentata_.

1_c._ _Lepas anatifera_, internal view of right-hand scutum, to
show the tooth at the umbo.

2. _Lepas Hillii_, (nat. size.)

3. _Lepas pectinata_, (magnified thrice.)

3_a._ _Lepas pectinata_, var. (_spirulae_), tergum, magnified
thrice.

4. _Lepas anserifera_, (nat. size.)

5. _Lepas australis_, (nat. size.)

5_a._ _Lepas australis_, carina, external view of, magnified
twice.

6. _Lepas fascicularis_, (nat. size,) with its peduncle, together
with those of three other specimens, imbedded in a vesicular
ball of their own formation, of which a slice has been cut
off