920 MANUAL OF THE MOLLUSCA, 
Type, P. plumbea. Pl. V., Fig. 12. 
Shell globular, thick; with a deep spiral furrow near the 
front of the body-whorl, forming, as in monoceros, a small tooth 
on the outer lip; spire short, acute; suture channelled; inner 
lip callous; aperture notched in front; operculum? Animal 
unknown. 
Distribution, 6 species. Africa and California. 
Fossil, 5 species. Hocene. Britain, France, Chili. 
P ANOLAX (Roissy), Conrad, Lea. 
Etymology, an aulax, without furrow. 
Synonyms, Buccinanops, D’Orbigny. Leiodomus, Sw. Bullia, 
Gray. 
oe A. gigantea, Lea. Bue. levigatum. 3B. semiplicata, - 
PV... wae, 14, 
Shell variable ; like buccinum, pseudoliva, or terebra; sutures 
enamelled ; inner lip callous. 
Animal without eyes; foot very broad; tentacles long anc 
slender; operculum pointed, nucleus apical. 
Distribution 26 species. Brazil, West Africa, Ceylon, Pacific 
Western America. 
Fossil, 8 species. Hocene—. North America, France. 
? Hatta, Risso. 
Etymology, halios, marine. 
Synonym, Priamus, Beck. 
Types, bulla helicoides (Brocchi). Miocene, Italy. Helix 
priamus(Meuschen). Coast of Guinea ? 
Shell like achatina ; ventricose, smooth ; apex regular, obtuse, 
operculum? ‘The fossil species occurs with marine shells, and 
sometimes coated by a polyzoon (lepralia). 
TEREBRA, Lamarck. Auger-shell. 
Synonyms, Acus, Humph. Subula, Bl. Dorsanum, Gray. 
Type, i. macwlata. “Pl. V., Hie: 13, 
Shell long, pointed, many-whorled; aperture small; canal 
short; operculum pointed, nucleus apical. 
Animal blind, or with eyes near the summit of minute 
tentacles. 
Distribution, 109 species, mostly tropical. Mediterranean 
(1 species). India, China, Western America. 
Fossil, 24 species. Fiocene—. Britain, France, Chil. 
