164 THE GASTROPODA 
TRIBE 1. RACHIGLOSSA. 
These are Stenoglossa with a highly-developed proboscis, a pallial 
siphon, and rudimentary jaws: the radular formula is 1.1.1 (Fig. 74, H). 
Famity 1. TURBINELLIDAE, Sowerby. Shell solid, piriform, with a 
thick folded columella ; foot broad; proboscis long; tentacles conver- 
gent; lateral teeth of the radula bicuspidate. Genera—Turbinella, 
Lamarck ; shell with short spire and long canal. Cynodonta, Schumacher ; 
spire and canal short; shell tuberculated. Fulgur, Montfort; shell 
piriform ; tentacles short. Hemifusus, Swainson; shell fusiform with 
carinated whorls ; tentacles short (Fig. 99). Tudicla, Link. Strepsidura, 
Swainson. Faminy 2. Fascronarimpan, Adams. Shell elongated, with 
a long siphon ; head small and narrow, with short tenacles ; foot rather 
broad and short; lateral teeth of the radula multicuspidate. Genera 
Fasciolaria, Lamarck. Fusus, Lamarck. Clavella, Swainson. Laturus, 
Montfort. Faminty 3. Mirrrpar, Adams. Shell fusiform and _ solid, 
the spire pointed, the aperture elongated and the columella folded ; no 
operculum ; tentacles elongated, bearing the eyes at their sides; foot 
narrow ; proboscis very long; siphon moderately long. Genera—WMitra, 
Lamarck. Turricula, Klein. Cylindromitra, Fischer. Imbricaria, 
Schumacher. Faminy 4. Buccrnipar, Fleming. Foot large and broad ; 
eyes at the bases of the tenacles; shell ovoid, with oval aperture; a 
horny operculum. Genera—Chrysodomus, Swainson; shell fusiform, 
solid, with an unguiculate operculum; British. Liomesus, Stimpson ; 
shell ovoid, with a very short canal ; tentacles short ; lateral teeth of the 
radula unicuspidate. Buccinwm, Linnaeus ; shell ventricose with a wide 
aperture ; operculum oval with sub-central nucleus ; tentacles moderately 
long ; lateral teeth with three or four cusps; British. Comnella, Gray ; 
shell fusiform ; the operculum oval to piriform, with an apical nucleus. 
Tritonidea, Swainson ; shell ventricose ; operculum like that of Cominella. 
Pisania, Bivona; shell with a short canal; operculum unguiculate ; 
lateral teeth tricuspidate. Huthria, Gray ; shell fusiform, with elongate 
spire and canal. Phos, Montfort ; foot broad with two lateral projections 
anteriorly and a slender posterior filament. Dipsacus, Klein; foot 
elongated ; tentacles long ; shell ovoid, solid, with a short canal; lateral 
teeth bicuspidate. Faminy 5. Nasstpan, Swainson. Foot broad, with 
two slender posterior appendages ; siphon long; shell ovoid, with a short 
canal; operculum unguiculate. Genera— Nassa, Lamarck ; external 
border of the aperture of the shell thickened ; marine ; British. Canzdia, 
Adams; exterior border of the aperture simple; fluviatile. Bulla, 
Gray ; shell polished; tentacles without eyes; foot very broad; a 
burrowing form. Famiry 6. Muricipan, Fleming. Foot truncated 
anteriorly ; tentacles elongated, bearing the eyes on their sides, more or 
less high up; shell with moderately long spire and canal, ornamented 
with ribs, often spiny. Genera—Murex, Linnaeus ; eyes half-way up the 
tentacles ; canal almost closed ; British. Trophon, Montfort ; eyes at the 
bases of the tentacles; shell lamellar; canal open; British. Typhis, 
Montfort ; sheli with closed canal and tubular spines. Urosalpina, 
Stimpson. Lachesis, Risso. Famity 7. PurpurRIDAE, Broderip. Foot 
