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VOLUTA. 
Vortuta, Linn., Cuv., Lam. 
CHARACTER GENERICUS. 
Testa ovalis, spiralis, univalvis, basi oblique emargi- 
nato, (non canaliculato), apice producto; columella 
plicata. 
Voturartius trachelepodus, pede compresso aa cer- 
vicis basin inferiorem; corpore spirali; capite ten- 
taculis duobus acutis, oculis ad illorum basin exte- 
rlorem; ore rostriformi, cylindrico, elongato, re- 
tractili, denticulis acutis subcurvatis instructo; oper- 
culo nullo. 
VOELUTPE. 
GENERIC CHARACTER. 
Shell oval, spiral, univalve, with the base obliquely emar- 
ginated (but not channelled), the apex produced; pillar 
folded. 
ANIMAL with a compressed foot at the inferior base of 
the neck; ody spiral; head with two sharp tentacula, with 
eyes at their exterior base; mouth invert-shaped, elongate, 
cylindrical, retractile, and furnished with little, acute, and 
somewhat incurved teeth; no operculum. 
The animals of this genus are marine, and feed on ani- 
mal substances. 
In the Annales du Museum there is an excellent mono- 
graph on the recent and fossile species of this genus, by 
Professor Lamarck. 
