FAMILY 8. CANALIFERA. 18] 
Plt COXXIX, Fis. 4, 
TURBINELLUS IMPERIALIS, Nobis, Proceedings Zool. Soc., 1842. 
Pl. CCXXIX. Fig. 5. 
TURBINELLUS CAPITELLUM, Lamarck, Anim. sans vert , Vol. vii. p. 106. 
Chemnitz, Conch,, vol. xi. pl. 179. f. 1723 and 1724. 
Turbinella muricata, Encyclopédie Méthodique. 
Pl. CCXXIX. Fig. 6 and 7. 
TURBINELLUS ARMATUS, Broderip, Proceedings Zool. Soc., 1833, Dante 
CANCELLARIA, Lamarck. 
Testa ovalis, extus costellata, aut varié reticulata, anfractu ultimo sub- 
ventricoso, umbilicum amplum spits formante; columella valdé 
plicata, plicis modo perpaucis, mod numerosis, in canalem brevem, 
nonnunquam posticé recurvum, desinente ; apertura ovata, vel ob- 
longo-ovata, labro subexpanso, plerumque denticulato, fauce sul- 
cata aut striata. 
There are few genera of mollusks which have been so enriched by mo- 
dern discovery as the present: of the seventy or eighty species with which 
we are now acquainted only nine were known to Lamarck, and there is 
scarcely one of this beautiful series that is not esteemed for its compara- 
tive rarity. The Cancellariz were included by the early naturalists with 
that large and heterogeneous mass of shells which they described under 
the common titles of Buccinum and Purpura, whilst Linneeus, attaching an 
undue importance to the plaits on the columella, referred them to his 
genus Voluta. Lamarck detected their affinity with the Turbinelli, to 
which they are intimately allied, although their shells may be said to 
differ in many important particulars. They are never fusiform, so that 
