ACTvKON. 153 



edged with dark at the shoulder and another at the lower third of 

 the body-whorl ; the latter or both girdles often absent. Whorls 

 about 8, sculptured with close, fine, engraved spiral lines, punctate at 

 their bottoms, the base having coarser line with delicately latticed 

 interstices. Last whorl about three-fourths the shell's length. 

 Aperture narrow, two-thirds the shell's length; columella concave 

 below, having one stout oblique fold above. 



Alt. 19, diam. 10 mill. 



Entire Mediterranean and Adriatic Seas ; Atlantic from Norway to 

 Morocco, in laminarian and coralline zones. 



Voluta tornatilis LINNE, Syst. Nat. xii, p. 1187, (1766). HANLEY, 

 Ipsa L. Conch., p. 212. Turbo ovalis DACosxA, Brit. Conch., p. 

 101, pi. 8, f. 2 (1778). Bulimus tornatilis BRUG., Diet. Encyc., p. 

 338 (1789). Voluta bifamiata GMEL., Syst. Nat. xiii, p. 3436. 

 Tornatella fasciata LAM., An. s. Vert, vi, p. 220 (1822). KIENER, 

 Coq. Viv., p. 5, pi. 1, f. 3. FORBES & HANL., Brit. Moll, iii, p. 523, 

 pi. 114, f. 3, pi. vv, f. 7. Speo tornatilis Risso, Hist. Nat. Eur. 

 Merid. iv, p. 236. Speo bifasciatus Risso, L c. Tornatella torna- 

 tili* PHIL., Enum. Moll. Sicil. ii, p. 143. REEVE, Conch. Icon, xv, 

 pi. 1, f. 7. Actwon tornatilis MONTFORT, Conch. Syst. ii, p. 315 

 (1810). H. & A. AD., Gen. Rec. Moll, ii, p. 4, pi. 56, f. L JEF- 

 FREYS, Brit. Conch, iv, p. 433 ; v, p. 224, pi. 95, f. 2. HIDALGO, 

 Mol. Mar. Esp., pi. 19, f. 3, 4 ; pi. 20c, f. 1. SARS, Moll. Reg. Arct. 

 Norv., p. 280, pi. 17, f. 11. BUQ., DAUTZ. & DOLLF., Moll. Rouss. 

 i, p. 510, pi. 66, f. 15-19. 



This species is the type of the genera Acteon, Tornatella and Speo. 

 It is a common and widely dispersed European form. The follow- 

 ing varieties and named color-mutations are recognized by the 

 authors of" Les Mollusques marins du Roussillon." 



Var. minor Monts. 



Var. subulata Searles Wood. PI. 19, fig. 14. Elongated, narrow, 

 with elevated spire. Originally described as a fossil (Crag Moll- 

 usca i, p. 170, pi. 19, f. 7), it has been found living off the English 

 coast. 



Var. tenella Loven. Small, with thin, subpellucid shell, more 

 shining than in the type (Index Moll. Scand., p. 11). 



Var. bullceformis Jeffr. Small, regularly oval, with very short 

 spire (Brit. Conch, iv, p. 435). 



Var. albobifasciata Monts. Two upper bands only present. 



