298 BURTOA. 



crenulate. Whorls 8y 2 , convex, the first two smooth, whit- 

 ish, the last longer than the spire; columella straightened, 

 vertical, reaching to the base. Aperture oblong-semioval, 

 whitish inside; peristome simple, white, the columellar mar- 

 gin rather narrowly expanded, reflexed, partly covering the 

 umbilicus, basal and outer margins acute. Length 46, diam. 

 28, aperture 28x13 mm. (Crosse). 



L. hidalgoi CROSSE, Journ. de Conch., xv, 1867, p. 446; 

 1868, p. 170, pi. 6, f. 1. PFR., Monogr., vi, 208. KOBELT,, 

 C. Cab., p. 79. 



A unicolored species of unknown origin. 



72. L. PYRRHA (Albers). PL 27, figs. 3, 4. 



Shell subperforate, turrite-oblong, granulate-decussate 

 throughout; dirty fulvous, ornamented with straight rufous 

 streaks, especially on the upper whorls. Spire long, obtuse. 

 Whorls 8, a little convex, the last nearly three-sevenths the 

 total length, subcompressed around the perforation. Colu- 

 mella vertical, descending to the base of the aperture. Aper- 

 ture slightly oblique, oblong-oval, white inside with a pearly 

 luster. Peristome simple, acute, the columellar margin 

 broadly reflexed. Length 50, diam. 22 mm. ; aperture 22 

 mm. long, 11 wide (Pfr.). 



Bulimus pyrrkus ALBERS, Die Hel., 1850, p. 173. PFR., 

 Monogr., iii, p. 385 ; Conchyl. Cab., p. 156, pi. 48, f . 19, 20. 

 L. pyrrha SHUTTLW., Notitiae, p. 46. PFR., Monogr., iv, 

 584; vi, 208. KOBELT, C. Cab., p. 56. 



Habitat unknown. Pfeiffer's figures and description of 

 the type are given. 



Genus BURTOA Bourguignat, 1889. 



Burtoa BOURGUIGNAT, Mollusques de 1'Afrique Equatoriale, 

 p. 88 (March, 1889), type B. nilotica var. schiveinfurthi. 

 Burtopsis BGT., t. c., p. 98, for B. giraudi and B. jouberti. 

 Livinhacia CROSSE, Journal de Conchyl., xxxvii, pp. 107, 108 

 (April, 1889), type L. nilotica Pfr. 



Shell perforate, oblong-ovate, usually fleshy under a thin 

 yellowish or brown cuticle, with occasional dark brown 



