FAMILY 10. PURPURIFERA. 233 
Magilus in an early stage of growth* ; but the particulars which that au- 
thor gives of its anatomy, together with the differences which have been 
remarked in the shell, are fully conclusive of its separate and distinct 
nature. 
The shell of Leptoconchus may be described as being somewhat globose, 
fragile, transparent, and longitudinally striated ; the spire is depressed or 
nearly obsolete, and the whorls are regularly convex, the last being ven- 
tricose, and inflated ; the aperture, which is concentrically oval, is a little 
sinuated at the base, and the margins are superiorly disjoined ; the colu- 
mella is indented, and very slightly truncated ; and the outer lip is thin, 
acute, and somewhat contracted towards the lower part. 
Ezample. 
Pi. CCLXVII. Fig. 1 to 5. 
Leproconcaus striatus, Ritppell, Transactions of the Zoological Society 
of London, vol. i. p. 259. pl. 35. f. 9 and 10. 
BUCCINUM, Linneus. 
Testa ovata, vel oblonga, interdum subturrita, ad basem aut emarginata, 
aut leviter canaliculata ; spira elaté, apice subobtuso ; apertura or- 
biculari, superné angulata; columella crassiuscula, levi, plus mi- 
nusve expansd, in mucronem desinente ; labro externo subreflexo, 
interdum crenato, processu dentiformi ad inferiorem partem raro 
armato ; fauce nonnunquam leviter sulcata. Operculum corneum. 
The title of Buccinum or Trumpet was applied indiscriminately by the 
ancients to shells of the most anomalous character ; indeed Linnzeus may 
be said to have been the first to make a pure generic appropriation of it. 
His genus Buccinum still, however, included a numerous assemblage of 
species ; the whole of the Purpurifera then known were referred to this 
single generic division, and presented, therefore, abundant material for 
* The Magilus ellipticus, Sowerby, may probably be one of these. 
VOL. II. 2H 
