TORNATELLA. 523 



TORNATELLA. Lamarck. 



Shell solid, ovate, subcylindrical, more or less spirally 

 striated, rarely smooth ; spire produced ; aperture narrow, 

 expanding- and rounded below ; pillar lip spirally contorted, 

 with a fold. Operculum corneous, elliptical. 



Animal not investing the shell ; its head is a quadrate 

 disk, bilobed in front, and bearing" two broad obtuse semi- 

 circular lobate tentacula capable of reflection on the shell 

 posteally ; at the upper or inner bases of which are im- 

 pressed two small eyes. No central teeth on tongue, many 

 uncinated laterals. Mantle closed in front, its lateral 

 lobes slightly reflected on the shell ; branchial plume 

 single. Male organ long, cylindrical, reflected. Foot ob- 

 long, truncate in front, obtuse behind. 



This genus is probably the most ancient in point of 

 appearance in time of its tribe. So much confusion 

 attaches to the name Acteon, applied to it by De Montfort, 

 that we have preferred its Lamarckian appellation. 



T. FASciATA, Linnseus. 



Plate CXIV. D. tig. 3, and (Animal) Plate V. V. fig. 7. 



Knorr, Delices des Yeux, vol. vi. pi. 1!), f. 4. — Encycl. Meth. 

 Vers, pi. 452, div. 1, f. 3. 

 Vol'itu tornatilis, Linn. Syst. Nat. ed. 12, p. 1187. — Penn. Brit. Zool. ed. 4, 

 vol. iv. p. 117, pi. 71, f. 86. — Pultenev, Hutcliins, Hist. 

 Dorset, p. 41. — Donov. Brit. Shells, vol. ii. pi. 57; in Rees' 

 Cycl. Conch, pi. 1 (1803).— Mont. Test. Brit. vol. ii.p. 231. 

 — Maton and Rack. Trans. Linn. Soc. vol. viii. p. 129.— 

 Rack. Dorset Catalog, p. 44, pi. 14, f. 2. — Turt. Conch. 

 Diction, p. 249, f. 32, 33. — Olivi, Zool. Adriat. p. 141.— 

 DiLLW. Recent Shells, vol. i. p. 503. — Wood, Index Testae, 

 pi. 19, f. 11.— C111A.TE, Poli Test. Sicil. vol. iii. pt. 2, p. .34, 

 pi. 46, f. 47, 48. 



