MADEIRAN SPECIES OF LAURIA. 113 



44a. L. monticola pwmilio (Wollaston). PI. 12, fig. 15. 



Rather short, obtusely cylindric, subopaque, reddish-brown, 

 densely costnlate. Wliorls convex, rather swollen, some- 

 times banded. Aperture rather small, rounded-auriform, 

 distinctly 6-plieate (indistinctly 7-plicate), thus: two ven- 

 trals, the outer oblique, tiexuous, the inner a little immersed 

 but not so large; 1 columella!- (the upper being subobsolete) ; 

 and 3 palatals, remote but conspicuously lengthened. Peri- 

 stome incomplete, being widely interrupted between colu- 

 mella and the outer ventral fold, the outer lip rounded out- 

 wardly (scarcely sinuate), with an obsolete denticle, sinulus 

 not very distinct. Length 1 to 1*4 lines. (Wollaston). 



A trifle smaller, darker and more solid (than typical 

 monticola), with its costa 1 a little less sinuate and more 

 closely set together, and with its ultimate volution and aper- 

 ture just appreciably less developed ; the third palatal plait, 

 on the contrary, being more so, and distinctly larger 

 (Wollaston) . 



Porto Santo, in certain exposed, weather-beaten spots but 

 slightly raised above sea-level. 



The distinction between the species and this variety from 

 lower levels seems to me rather slight, being somewhat in- 

 constant in several lots examined from the Lowe- Wollaston 

 collection. A specimen of pumilio measures 2.2 x 1.2 mm. ; 



6 whorls. 



45. Laubia calathiscus (Lowe). PI. 14, figs. 2, 3. 



The shell is shortly cylindric, with short conic summit, 

 solid; chocolate or somewhat lighter, with two pale bands, 

 one midway between periphery and suture, the other below 

 the periphery. Surface matt, with sculpture of strong, 

 curved ribs separated by spaces double the width of the 

 ribs. The whorls are very convex. Aperture auriform, with 



7 teeth. Angular lamella large, oblique, connected with the 

 lip-insertion, entering nearly to the dorsal side. Parietal 

 lamella very small and short. Columellar lamella strong, not 

 emerging to the peristome. The lower-palatal fold is strong 

 and rather long. Upper-palatal short, united with the lip- 



