MADEIRAN SPECIES OF LAURIA. 99 



Length 3.4, diata. 1.7 mm. nearly 7 -whorls. 



Length 3.2, diam. 1.7 mm. 6% whorls. 



Madeira.-, chiefly about the trunks of old laurels in the 

 wooded districts of intermediate elevations; Ribeiro Frio, 

 S. Antonio da Serra and the Boa Ventura. Also Pleistocene 

 at Canical (Wollaston). 



Pupa laurinea Lowe, Ann. Mag. N. H. (2) ix, 1852, p. 276. 

 — Albers, Malac. Mader. p. 64, pi. 15, f. 31, 32.— Pfr., 

 Monogr. ii, 543 ; vi. 309.— Wollaston, Test. Atl. p. 220. 



It is much smoother than L. concimta, the striation being 

 very fine ; the color is lighter ; there is more or less callus be- 

 tween angular lamella and lip-insertion, but this callus is 

 sometimes interrupted in the middle ; finally, the sinulus is 

 somewhat more open below. The lamella? and folds are other- 

 wise nearly similar. 



In quite young shells of 3-3% whorls there are two radial 

 basal folds. In those two-thirds grown there may be 4 or 5 

 in the last half whorl. 



33. Laubia sphixctostoma (Lowe). PI. 11, figs. 10, 11, 12. 



The shell is slowly tapering subcylindrie, in the upper 

 third tapering convexly to the blunt apex; brown, with the 

 base and a narrow band in the middle of upper surface pale. 

 Surface somewhat shining, strongly striate, this sculpture 

 disappearing more or less on the last whorl and absent from 

 the first 1%. The whorls are slightly convex, the last a little 

 compressed towards the base, excavated behind the columellar 

 lip. Aperture 6-plicate. The very high angular lamella is 

 branched above, curving into the outer lip. The strong 

 emerging columellar lamella slants downward. Supracolum- 

 ellar lamella small, less emerging, entering deeply. The 

 angular, parietal, columellar and supracolumellar lamellae 

 are about equally long, penetrating inward nearly to a dorsal 

 position (pi. 11, fig. 12). Low T er-palatal fold strong, 

 somewhat immersed, entering to the dorsal side. Upper- 

 palatal represented by a very weak callus running inward 

 and downward from the strong tooth of the outer lip. Basal 

 fold well developed, somewhat immersed. No suhcolumellar 



