296 PYRAMIDELLIDiE. 



O. INTERSTINCTA, MoiltUgU. 



Turreted, not scalar, with closely disposed longitudinal ribs, 

 not clathrated ; body much shorter than the spire : a strong 

 though remote tooth upon the pillar. 



Plate XCV^ 1 1, fig. 1. 



Turbo canaliculatus, AuAMS, Trans. Linn. Soc. vol. iii. p. 253 ? (from which 

 Fleming, Brit. Animals, p. ;iOO). 

 „ intersiindus (scarcely of Adams), Mont. Test. Brit. vol. ii. p. 324, pi. 12, 

 f. 10. — TuRT. Conch. Diction, p. 223 (colour excepted). — 

 Alder, Cat. Moll. Northnmb. and Durh. p. 52. 

 Vohifa intcrstiiKta, Maton and Rack. Trans. Linn. Soc. vol. viii. p. 131. — 

 DiLLW. Recent Shells, vol. i. p. 509. — Woon, Lidex Tes- 

 taceolog. pi. 19, f. 25. 

 (hldstmnia inlersUncta, Fleming, Brit. Animals, p. 310. — Macgilliv. Moll. 

 Aberd. p. 155. — Brit. Marine Conch, p. 173. — Jeff. 

 Ann. Nat. H. (new scr.) vol. ii. p. 343. 

 „ ohlo7iga, Macgilliv. Moll. Aberd. p. 157 (fide Jeflfreys, from type) ; 



copied, Brit. Marino Conch, p. 260, and Brown, Illust. 

 Conch. G. B. p. 130 (as Jaminia ohlot>{)a). 

 Jaminia hiterstincta. Brown, Illust. Conch. G. B. p. 21, pi. 9, f. 10. 



„ ohtiisa. Brown, 111. Conch. G. B. p. 22, pi. 9, f. 38. 

 Pyramis Lamarckii, Brown, 111. Conch. G. B. p. 15, pi. 9, f. 39. 



Like most of its genus, the shell is of a shining snow- 

 white, and very slightly transparent ; it is turreted, but 

 not very slender, and varies as to the degree of attenuation 

 in the spire. Its surface is adorned with a good many, 

 Lut not crowded (except occasionally upon the body), 

 nearly straight and perpendicular, strong, square-cut, lon- 

 gitudinal ribs, that are usually obsolete upon the lower 

 portion of the body, but extend upon the other whorls 

 from top to bottom ; the profound intervals (at least upon 

 the spire and upper half of the final coil) are quite smooth, 

 except a single obscure spiral raised line, that usually 

 revolves immediately over the broad and profound oblique 

 suture. For the most part, likewise, there are two spiral 



