24S MANUAL OF THE MOLLUSCA. 
MELANopsis, Lam. 
Types, M. buccinoides, M. costata. Pl. VIII., Fig. 30. 
Shell body-whorl elongated; spire short and pointed; aper- 
ture distinctly notched in front; inner lip callous; operculum 
sub-spiral. 
Distribution, 21 species. Spain, Asia Minor, New Zealand. 
Fossti, 25 species. ocene—. Europe. 
Sub-genus. Pirena, Lam, (faunus, Montfort) P. atra. Pl. 
VIII, Fig. 31. Spire elongated, many-whorled; outer lip of 
oN 
Ree 
7. . ve 
Fig. 102. Pirena atra. (Wilton.) 
the adult produced. Teeth 3. 1. 3, as in Fig. 102. 
Distribution, 4 species? South Africa, Madagascar, Ceylon, 
Philippines. 
FAMILY V.—TURRITELLIDA. 
Shell tubular, or spiral; upper part partitioned off; aperture 
simple; operculum horny, many-whorled. 
Animal with a short muzzle; eyes immersed, at the outer 
bases of the tentacles ; mantle-margin fringed ; foot very short; 
branchial plume single; tongue armed; dentition 3. 1. 38. 
TURRITELLA, Lam. 
Etymology, diminutive of turris, a tower. 
Synonyms, Terebellum, Torcula, Zaria, and Hglisia (Gray.) 
Type, T. imbricata. Pl. [X., Fig. 1. 
Shell elongated, many-whorled, spirally striated; aperture 
rounded, margin thin; operculum horny, many-whorled, with 
a fimbriated margin. 
Animal with long, subulate tentacles; eyes slightly promi- 
nent; foot truncated in front, rounded behind, grooved beneath; 
branchial plume very long; lingual ribbon minute; median 
teeth hooked, denticulated ; uncini 3, serrulated. Carnivorous? 
Distribution, 73 species. World-wide. Ranging from the 
Laminarian Zone to 100 fathoms. West Indies, United States, 
Britain (1 species), Iceland, Mediterranean, West Africa, China, 
Australia, West America. 
Fossil, 172 species. Neocomian—. Britain, &c., South 
America, Australia, Jaya. 
