206 SCALARIAD^. 



We have no note of the animal of this species. Itsj 

 tongue is described by Loven, who states that there are 

 uo axile teeth, but unguicular, somewhat broad, anteriorly 

 produced, simple uncini. 



It is a rare species, chiefly southern and western, 

 though occurring off Whitburn (Alder) ; and Scarborough 

 (Bean). It has been taken at Exniouth (Clark) ; Tenby 

 (Jeffreys) ; Burrow Island and Laugherne (Barlee) . Clyde 

 province (E.F.). In Ireland it has occurred in a few loca- 

 lities, from Youghal (R. Ball) to the County Down north- 

 wards, on the eastern line of coast (W, Thompson) ; Cork 

 and Bantry (Humphreys) ; Arran in Ireland (Barlee). 



It ranges from Norway to the Mediterranean. 



S. COMMUNIS, Lamarck. 



Variegated ; ribs promiuent, oblique, of uniform size, their in- 

 tervals quite smooth ; sutures excavated. 



Plate LXX. fig. 9, 10. 



Plancus, Couch. Minus Notis, jjI. 5, f. 7. — Ginanni, Opere 

 Posth. pi. 6, f. 54. 

 'I'uibo ckUkius, LiNN. Syst. Nat. ed. 10 (not 12), p. 7G5 (partly). — Penn. Brit. 

 Zool. ed. 4, vol. iv. p. 129, pi. 81, f. 111.— Pulteney, Hut- 

 chins, Hist. Dorset, p. 45. — Mont. Test. Brit. vol. ii. p. iOO" ; 

 Suppl. p. 120, animal. — Maton and Rack. Trans. Linn. Soc. 

 vol. viii. p. 170, var. a. — Rack. Dorset Catalog, p. 50. pi. 15, 

 f. 11. — TuRT. Conch. Diction, p. 207. — Born, Testacea Mus. 

 Ctes. Vind. p. 354. — Dillw. Recent Shells, vol. ii. p. 854. — 

 Wood, Index Testae, pi. 31, f. 90. 

 Stroiubiformis cluthratus. Da Costa, Brit. Conch, p. 116, pi. 7, f. 11. 

 Tarho cluthratus, DoNOV. Brit. Shells, vol. i. pi. 28, f. 1, 2, 3. 

 .Scahtria cummuuis. Lam. Anim. s. Vert. (ed. Desh.) vol. ix. p. 75. — Brit. Marine 

 Conch, p. 156. — Blainv. Faune Franij. Moll. p. 314. — 

 Desh. Encycl. Method. Vers, vol. iii. p. 931, var. a. — 

 Philippi, Moll. Sicil. vol. i. p. 1C7, pi. 10, f. 3 ; vol. ii. 

 p. 144. — KiENER, Coquilles Vivant. Seal. p. 12 (partly), 

 pi. i. f. 2, and pi. 4, f. 10. — Sowerby, Thesaur. Conch, 

 vol. i. p. 85, pi. 32, f. 18, 19, 20. 



