248 HIANTJAL OF THE MOLLUSCA. 



Melats^opsis, Lam. 



Types, M. buccinoides, M. costata. PI. VIII., Fig. 30. 



Shell body-wliorl 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. 



Fossil, 25 species. Eocene — . Europe. 



Suh-genus. Pirena, Lam, (faunus, Montfort) P. atra. PL 

 YIIL, Fig. 31. Spii-e elongated, many-wborled ; outer lip of 



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 Y. — Turbitellid^. 



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. 3. 



TumiiTELLA, Lam. 



Etymology, diminutive of turris, a tower. 



Synonyms, Terebellum, Torcula, Zaria, and Eglisia (Gray.) 



Type, T. imbricata. PI. IX., 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, Java. 



