118 MACROCERAMUS, PORTO RICO, ETC. 



Group of M. lineatus. 

 3. M. SIGNATUS Guilding. PL 24, figs. 65-70. 



Shell shortly and deeply rimate, pyramidal, rather thin, 

 the lateral outlines nearly straight; glossy, white, marked 

 with a series of 8-like figures, each upon a narrow brown 

 streak, the base bounded by a brown band and usually having 

 a median band also ; apical whorls dark. Sculpture of fine 

 striae on the earlier whorls, the later ones smooth except for 

 growth-lines. Whorls usually 11 to 12, somewhat convex, the 

 last rounded, without a keel or angle. Aperture slightly 

 oblique, rounded- truncate, as wide as long, ochre tinted and 

 banded within; peristome white, thin, very narrowly ex- 

 panded, the columellar margin dilated. Axis very slender and 

 straight, encircled by an inconspicuous spiral cord. 



Length 17.5, diam. above aperture 6.5 mm. 



Length 16, diam. above aperture 6.3 mm. 



Length 14, diam. above aperture 5.5 mm., whorls 101/2- 



Virgin Islands: Tortola (type locality; Guilding, Swift, 

 et al.) ; Anageda (Dr. Cleve). Also Anguilla (Sawkins). 



Macroceramus signatus GUILDING, Zool. Journal, iv, p. 168 

 (1828). BECK, Index, p. 73. PETIT, J. de C., i, 1850, p. 379. 

 PFR,, Monogr., iv, p. 688; vi, p. 344. CROSSE & FISCHER, 

 Journ. de Conch., 1870, p. 12, pi. 3, f. 14-16 (teeth) .BLAND 

 and MORSE, Ann. Lye. Nat. Hist, of New York, viii, p. 162, 

 f. 5 (jaw), 6 (teeth) ; repeated in Ann. Lye., ix, p. 84, f. 4; 

 and by W. G. BINNEY, in Proc. Acad. Nat. Sci. Phila,, 1875, 

 p. 223, f. 65 (jaw). CROSSE, J. de C., 1891, p. 131. Bulimus 

 signatus SOWERBY, Conchol. Illustr., f. 57. Leptospira sig- 

 nata SWAINSON, Malacology, p. 335, fig. 97, a, I on p. 333 

 (1840). 



Bulimus articulatus TURTON, Manual of the Land and 

 Fresh- water Shells of the Brit, Is., p. 85, f. 68 (1831). Bul- 

 imus cylindricus Gray, PFEIFFER, Monogr., ii, p. 80; not of 

 Gray. B. cylindrus GRAY, Turton's Manual, etc., new edit., 

 1840, p. 20, f. 68. Bulimus guildingii PFR., Symbolse, i, p. 82; 

 ii, p. 115 ; Monogr., iii, p. 362 ; Conchyl. Cab., p. 128. pi. 42, 

 f. 10-12. REEVE, Conch. Icon., pi. 64, f. 445. 



