202 CLASS III. GASTEROPODA. ORDER VII. PECTINIBRANCHIATA., | 
cere, are distinguished by Gray, Sowerby and others of the present day, 
in imitation of Petiver, with the generic title of Aporrhais. The ’Awoppatcec 
of Aristotle, however, included all mollusks whose shells exhibit a widely- 
expanded lip or marginal varix, whether Rostellaria, Strombi, or Murices. 
The shell of Rostellaria may be described as being fusiform, or some- 
what turriculated, with the whorls slightly convex, and often longitudi- 
nally striated towards the apex ; the aperture is oblong, and opens into a 
long canal, which is sometimes extended half-way up the spire ; the colu- 
mella is polished, and ends in a beaked canal varying considerably in 
length ; the lip is somewhat winged, either dentated or digitated, and 
sinuated near the canal. The operculum is small and horny. 
Examples. 
Pl. CCXLVI. Fig. 1 and 2. 
Rostretiaria Povisi, Petit, Magasin de Zoologie, 1842. Sowerby, Jun., 
Thesaurus Conchyliorum, Part I. pl. 5. f. 5 and 6. 
Pl. CCXLVI. Fig. 3. 
RosTELLARIA OCCIDENTALIS, Beck, Magasin de Zoologie, pl. 72. 
Aporrhais occidentalis, Sowerby, Jun. 
Pl. CCXLVI. Fig. 4. 
RosTeLLaRia RECTIROSTRIS*, Lamarck, Anim. sans vert., vol. vii. p. 192. 
Martini, Conch., vol. iv. p. 338. Vignette 41. Sowerby, Jun., The- 
saurus Conchyliorum, pl. 5. f. 8 and 10. 
Purpura bilinguis, 
Buccinum bilingue, » Lister. 
Buccinum rostratum, J 
Murex fusus, \ Gee 
Strombus fusus, ; 
Fusus dentatus, Martini. 
Strombus clavus, Gmelin. 
* Cabinet of the Rey. Mr. Stainforth. 
