248 MANUAL OP THE MOLLUSC A. 



Melajstopsis, Lam. 



Tijpes, M. buccinoides, M. costata. PI. YIII., Fig. 30. 



Shell body-wlioii elongated ; spire short and pointed ; aper- 

 tirre distinctly notched in front ; inner lip callous ; operculum 

 sub-spiral. 



Distribution, 21 species. Spain, Asia Minor, New Zealand. 



Fossil, 25 species. Eocene — . Europe. 



Sub-genus, Pirena, Lam, (faunus, Montfort) P. atra. PI, 

 YIIL, Pig. 31. Spire elongated, many-whorled ; outer lip of 



Fig. 102. Pirena atra. (Wilton.) 



the adult produced. Teeth 3. 1. 3, as in Pig. 102. 



Distribution, 4 species ? South Africa, Madagascar, Ceylon, 

 Philippines. 



Family Y. — Tureitellid^. 



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. 



TUHBITELLA, Lam. 



Etymology, diminutive of turris, a tower. 



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



Type, T. imbricata. PI. IX., Pig. 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. Eanging 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. 



