638 CLASS xX. 
Family X. Lepadicea (BLAINV.) s. Anatifere. Animal sus- 
pended by a peduncle cylindrical, flexible. Shell mostly com- 
pressed or involucrum coriaceous. (Genus Anatifa BruG.). 
[These Cirripeds consist of a capitulwm, much flattened, and a 
pedicle of various length. The capitulum is generally formed of 
five or more valves, connected together by narrow or broad stripes 
of membrane : sometimes the valves are rudimental or absent, when 
the whole consists of membrane. Of the valves the scuta are the 
most persistent, then the ferga, then the carima, the rostrum and 
latera occur only in a few (Pollicipes). The scuta and terga are 
always considerably larger than the other valves. Within the 
capitulum is the sac which encloses the animal’s body. The pedun- 
cle is usually flattened, sometimes quite cylindrical. Its corium is 
very thick, and in those genera having numerous valves, scales are 
found at its connexion with the capitulum placed in whorls. The 
peduncle is lined by three layers of muscles, running from its bottom 
to the base of the capitulum: and the cement ducts may be traced 
upon them on each side until they expand into the two cement 
glands, and which are connected with the ovarian tubes. The 
cement escapes through the larval prehensile antennz, which may 
be always found quite close to the end of the peduncle if it be 
carefully removed from the surface of attachment. Vid. Darwin 
Lepadide, pp. 283—37. See also above, pp. 608, 609.] 
Tetralasmis Cuy., Ibla Gray. Peduncle short, hirsute. Shell 
with four valves, two dorsal long, narrow, and two ventral tri- 
angular. 
Sp. TZetralasmis hirsutus Cuv., Anatifa quadrivalvis CuvigER Mém. sum les 
Anatifes, fig. 14, GuaRIN Iconogr., Moll. Pl. 37, fig. 7. 
Anatifa LAM. (Species from genus Anatifa Bruc.). Peduncle 
smooth, resembling intestine, elongate in some. Shell with five 
valves; the single dorsal valve narrow, falciform. 
Goose-mussel. The four pieces of shell in pairs are, as in the preceding 
genus, to be compared with the opercular plates of the Balani ; the single 
piece of shell along the back of the animal carina corresponds to the calca- 
reous tube, and the stem is as it were an elongation of the basal piece of 
the tube of the last-named animals. 
Sp. Anatifa levis Lam., Lepas anatifera L., Buainv. Malacol. Pl. 86, fig. 3, 
GuERIN Iconogr. |. 1. fig. 1; this species is often thrown on our shores, 
especially in the winter months. In different districts of the north, a 
fable is current that a species of goose (Anas bernicla) has its origin from 
