peculiar manner in which the valves
of the lower whorl overlap each other, in the corium entering between
some of the valves in filiformed appendages, in the near equality of
size of the rostrum and carina, in the shortness of the peduncle in old
specimens, in the position of the cement-glands, and lastly in the
characters of the third pair of cirri, this species presents a closer
affinity to the sessile Cirripedes, more especially to the Chthamalinae,
than does any other species of any other genus amongst the Lepadidae. The
movements, however, of the four opercular valves are not at all more
independent of the other valves, than in the other Pedunculated
Cirripedes; and the peduncle is furnished with all its characteristic
muscles.

5. POLLICIPES SPINOSUS. Pl. VII, fig. 4.

ANATIFA SPINOSA. _Quoy_ et _Gaimard_. Voyage de l'Astrolabe. Pl.
xciii, fig. 17.

_P. capitulo valvarum uno aut pluribus sub-rostro verticillis instructo:
laterum pari superiore vix inferioribus longiore: membrana valvas
tegente (post desiccationem) subfusca flavescente: pedunculi squamis
inaequalibus, non symmetricis: verticillis longiuscule distantibus._

Capitulum with one or more whorls of valves under the rostrum: upper
pair of latera only slightly larger than the lower latera: membrane
covering the valves (when dried) light yellowish-brown: scales of the
peduncle of unequal sizes, unsymmetrical, arranged in rather distant
whorls.

Maxillae, with the edge square and straight: caudal appendages
uniarticulate: filamentary appendages, none.

New Zealand. Mus. Jardin des Plantes, Paris: Mus. Cuming.

_Capitulum_, flattened, triangular, broad, with the valves varying in
number, in full-grown specimens of the same size, from 30 to above 60;
the scuta, terga, and carina are very much larger than the other valves;
the rostrum, however, is nearly half the size of the carina; the
remaining valves are exceedingly small. In some specimens there is only
one whorl under the carina; in other specimens there are distinctly two
whorls. The scuta, terga, and carina stand pretty close together; they
are moderately thick, and are covered, in chief part, by yellowish-brown
membrane, which is destitute of spines.

_Scuta_, triangular, broad, basal margin slightly protuberant.

_Terga_, as large as the scuta, flat, regularly oval, basal point blunt
and rounded.

_Carina_ very slightly curved, triangular, internally rather deeply
concave,