180 MANUAL or THE MOLLUSCA. 



The shells of tliis family are chiefly extinct, ranging from the period of ) 



the coal strata, and attaining their greatest development in the cretaceous , 



age. Tornatella is essentially related to Bulla, but presents some resem- i 



blance to the Pyramidellldce in its plaited and operculated aperture; in j 



Tornatina the nucleus, or apex, is sinistral. The spiral striae which oma- | 



ment many of the species, are punctate, as in the Bullidse ; and the outer ' 

 lip often remarkably thickened, as in Auricula. 



Tornatella, Lamarck. j 



Ti/pe. T. tornatilis, PI. XIV. fig. 1 . Syn. Acta^on, Montf. (not Oken), I 



Dactylus (solidulus) Schimi. ? Monoptygma (elegans) Lea. i 



Shell solid, ovate, with a conical, many-whirled spire ; spirally grooved or 1 



punctate-striate ; aperture long, narrow, rounded in front ; outer lip sharp j i 



columella with a strong, tortuous fold ; operculum horny, elliptical, lamellar. 



Animal white ; head truncated and slightly notched in front, furnished \ 



posteriorly with recumbent tentacular lobes, and small eyes behind them, j 

 near their inner bases; foot oblong, lateral lobes slightly reflected on the 

 shell. Lingual teeth 12.12, similar, with long simple hooks. 



Fig. 103. 



Distr. 16 sp. U. States, Brit. Senegal, Red Sea, Philippines, Japan, 

 Peru. T. tornatilis inhabits deep water, ( — 60 fms. Forbes). 



Fossil, 70 sp. Trias — Lias — . N, America, Europe, S. India. 



Sub-genera, Cylindrites (LlhiATd) Lycett. C. acutus. Shy. PI. XIV. 

 fig. 2. (A.) Shell smooth, slender, sub-cylindrical, spire smaU, aperture long 

 and narrow, columella rounded, twisted, and directed slightly outwards. 

 (B.) Shell oval, spire sunk, whirls with acute margins. Bath Oolite, Brit. 



Jcteonina, D'Orb. TornateUse " vnthout columella plaits," 30 sp. 

 Carb. — Portlandian, (including Cylindrites). 



Acteonella, D'Orb. A. Renausiana, PL XIV. fig. 3. SheU thick, cone- 

 like or convoluted, spire short or concealed, aperture long and narrow, colu- 

 mella with 3 strong and regidar spiral plaits in front. I>istr. 11 sp. Chalk; 

 Brit. France. 



Acteon Cabanefia/ia, D'Ovh. {Itieria, ]\Iatheron, 1S42) Coral-rag, France, 

 belongs to the genus Nerinea (D'Orb.) p. 129. 

 CiNULiA. Gray. 



Type, C. avellana, PI. XIV. fig. 4. Syn. Avellana and Ringinella, D'Orb. 



Shell globular, thick, spirally groved and punctate, spire small ; aperture 



