110 MADEIRAN SPECIES OF LAURIA. 



41. Lauria relevata (Woll.) PL 12, figs. 6, 7. 8. 



The shell is cylindric, long and narrow, solid, dull brown. 

 Surface sharply and strongly ribbed, the ribs rather oblique, 

 about 8 in 1 mm. on the last whorl. The earlier whorls are 

 quite convex, the later ones somewhat flattened, the suture 

 deeply impressed. Aperture small, ovate-trapezoidal. Parie- 

 tal lamella emerging, oblique ; parietal and columellar lam- 

 ellag deeply immersed. Lower-palatal fold long, rather strong, 

 immersed; a very weak, short upper-palatal above it, and 

 below the weak lip-tooth, which is a little within the margin. 

 Basal fold rather feebly developed, immersed. The -peristome 

 is continuous, reflected, very pale flesh-tinted, the upper mar- 

 gin built out free of the whorl. 



Length 4.45, diam. 1.25 mm. ; 7% whorls. 



Length 4.3, diam. 1.3 mm. ; 7% whorls. 



Madeira group: Ilheo de Baixo (near Porto Santo), in 

 crevices of exposed rocks in the shore zone, extreme southern 

 point of the island (Wollaston and Lowe). 



Pupa relevata Wollaston, Test, Atlant., 1878, p. 229. 



Distinguished characters are the extreme length of this 

 parallel-sided species, together with the shape of the mouth, 

 of which the peristome is built out on a very short neck 

 (fig. 8). 



42. Lauria ferraria (Lowe). PI. 12, fig. 12. 



The shell is elongate, parallel, cylindric, subopaque, bright 

 rufous or somewhat blackish-brown, closely and sharply 

 costulate, a little less solid (than corneocostata). Whorls 

 convex, either uniform or with contrasting bands. Aperture 

 large, rounded ear-shaped, 4-plicate thus: 2 ventral [parietal 

 lamella?] the outer [angular] thin, lamelliform, oblique, 

 sinuous, the inner [parietal] small, short and deeply im- 

 mersed. 1 columellar lamella (no supracolumellar). 1 

 palatal (the first and third wanting). Peristome narrow, 

 thin, somewhat acute, the outer lip rounded (not bent in- 

 ward), with an obsolete denticle; the indistinct sinulus open. 

 Length about 1% lines (~Wollaston) . 



