122 COLUMNA. 



decussation of fine oblique wrinkles by incised spiral lines. 

 Whorls 7 to 8y 2 , those of the protoconch flattened, the fol- 

 lowing convex, with more or less deeply constricting and very 

 oblique sutures, the last whorl or two more or less compressed 

 in the middle. Aperture ovate, oblique, white inside. Colu- 

 mella deeply concave, with a callous fold above and a nar- 

 row truncation below. Internal column (fig. 8) slender and 

 imperforate, at first nearly straight, then strongly spiral, 

 with a projecting callous flange in the last whorl. 



Length 96, diam. 18 mm., whorls 8%. 



Length 77, diam. 17 mm., whorls 7 1 / 4. 



Prince Island: very abundant in the intermediate zone of 

 the mountains (Rang) ; very common under dead leaves in 

 the woods (de Folin). 



Buccinum columna MULL., Hist. Vermium, ii, p. 151 

 (1777). Helix columna GMEL., Syst. Nat. (13), p. 3653. 

 RANG, Ann. Sci. Nat., xxiv, p. 34, pi. 1, f. 1 (living animal). 

 Bulimus columna BRUG., Encycl. Meth., i, p. 332. Acha- 

 tina columna VOIGT in Cuvier, Thierreich, iii, p. 99. PFR., 

 Monogr., ii, p. 268; Conchyl. Cab., p. 302. REEVE, Conch. 

 Icon., v, pi. 11, f. 38. DESK, in Fer., Hist, ii, p. 168, pi. 

 123, f. 9, 10. Limax flammeus MARTYN, Univ. Conch., iii, 

 pi. 122; edit. Chenu, Bibl. Conch., ii, p. 28, pi. 41, f. 1. 

 Columna flammea SCHUMACHER, Essai d'un Nouv. Syst., p. 

 188. PFR., Monogr., iii, 468; iv, 570; vi, 188; viii, 252. 

 GIRARD, Jornal de Sciencias Math. Phys. e Nat. Acad. Real 

 das Sciencias de Lisboa (2 ser.), iii, 1893, p. 95. DOHRN, 

 Malak. Bl., xiii, p. 124 (living animal, eggs, etc.). Helix 

 pyrum GMEL., Syst. Nat. (13), p. 3665. Columna grisea and 

 C. marmorea PERRY, Conchology, pi. 51, figs. 6, 7 (1811). 

 Lymnea columnaris LAM., An. s. Vert., vi, p. 159 ; Encycl. 

 Meth., pi. 459, f. 5. REEVE, Conch. Syst., ii, pi. 178, f. 14. 

 KUESTER, Conch. Cab., pi. 10, f. 10-13. Helix listeri BOLTEN, 

 Mus. Bolt., p. 108. Columna virgata GRAY, Figs. Moll. Anim., 

 pi. 302, f. 1. 



This remarkable species has been known for many years. 

 It ordinarily reaches the length of 75 to 80 mm., and prob- 

 ably never exceeds 100 mm. long. The degree of develop- 



