ROSTELLARIA. 475 
As to the anatomy, we need only observe, that the ceso- 
phagus is very long and circled behind the proboscidal mass 
by a cordon of four round yellow ganglia, three above, one 
beneath. The liver is dark greenish-brown and very granular ; 
the other organs, as the matrix, ovary, testis, viscous sac, 
anus, &c., offer no peculiarity. The organe générateur is long, 
yellow, strap-shaped, annulate for part of the basal portion, 
curving above to a point: it is not placed posteriorly, as some 
authors say, but under and anterior to the right tentaculum. 
We have omitted to state, that there is only one branchial 
plume, long, narrow, whitish-yellow, with about forty very 
short pectinations : above the plume there is a glandular sub- 
stance resembling the mucous fillets of the Canalifera; or it 
may be a second rudimentary plume; but in either case it 
denotes the Muricidal alliance. Notwithstanding the anoma- 
hes of this animal, its natural position is immediately before 
the proboscidal groups. We think that the Aporrhais pes car- 
bonis, lately introduced to the British list, is probably a deli- 
cate dwarf variety of the present species. It is from Zetland. 
R. pes CARBONIS, Brongniart. 
Aporrhais pes carbonis, Brit. Moll. ui. p. 186, pl. 89. f. 5, 6. 
Rostellaria pes pelecani, var., Kiener. 
MURICIDA. 
I here present malacological notes on the British Muricide, 
which are now distributed into Murex, Buccinum, Fusus, Pleu- 
rotoma, Purpura, Nassa, Trichotropis, and Cerithiopsis ; these 
genera form a part of Lamarck’s Canalifera and Purpurifera. 
This family is of enormous extent, and has its origin in the 
Linnzan genera Murex and Buccinum, which, though sepa- 
rated by Linnzus on artificial grounds, have their animals 
identical in all essential poimts ; and it can scarcely be doubted, 
with the views held by that great naturalist, that if he had 
been aware of their similar malacological structure, he would 
have merged the Buccina in Murex, or vice versd. We shall 
therefore consider them synonymous ; they have been split by 
the moderns into numerous genera on purely conchological 
