FAMILY 11. COLUMELLATA. 253 
Pl. CCLXXX. Fig. 7. 
Mirra pactytus, Lamarck, Anim. sans vert., vol. vii. p- 314. Kiener, 
Iconographie des Coquilles vivantes, pl. 31. f. 103. 
Cucumis crassus, Klein. 
Cylindrus crassus, Seba. 
Voluta dactylus, Linnzus. 
Conohelia dactylus, Swainson. 
Pl. CCLXXX. Fig. 8. 
Mirra MARMoRATA, Sowerby, Genera of Shells, No. 31. Quoy, Voyage 
de Astrolabe, pl. 45 bis. fig. 1 to4. Kiener, Iconographie des Co- 
quilles vivantes, pl. 34. f, 112. 
Imbricaria ? Schumacher. 
Conohelix marmorata, Swainson. 
VOLUTA, Linneus. 
Testa ovata, vel oblonga, ad basem emarginata, spira brevi, apice szpis- 
o™ 5 
simé papillari ; anfractibus aut levibus, aut costellatis, interdum su- 
perné coronatis ; apertura oblonga ; columella incrassata, obliqué 
plicata, plicis infimis maximis ; labro solido, parum revoluto. 
The genus Voluta was founded by Linnzus upon the single feature of 
a plaited columella, without reference to any accompanying character, 
and affords another instance of the great disadvantage under which that 
author laboured in his systematic arrangement of shells for want of a 
proper intimacy with the nature of their animal inhabitants. The Volutz 
of the ‘Systema Nature’ included both carnivorous and herbivorous 
mollusks, terrestrial, freshwater and marine; the shells of the Auricule, 
for example, of the Tornatelle, Pyramidelle, Turbinelli, Cancellarie, Fas- 
ciolarie, Columbelle, Mitre, Marginelle, Olive, &c., were all referred to 
this one genus on account of the columella being more or less plaited ; 
VOL. Il. 21 
