250 LIMICOLARIA, WEST AFRICA. 



Very near L. aurora, of which it may be a small variety. 

 Pfeiffer gives the measurements of a Cumingian specimen 

 as 40 x 17 mm. 



4. L. AGATHINA ' Gabb ' Pils., n. sp. PI. 19, fig. 11. 



Shell perforate, long-turrite ; white under a very thin yel- 

 lowish cuticle, with very few, narrow red-brown streaks, 

 which become more numerous on the spire, where they often 

 branch above; the upper whorls more or less reddish. Sur- 

 face slightly glossy, finely, irregularly striate, the median 

 whorls sparsely decussate, the spirals obsolete or nearly so 

 on the last whorl. Suture a little crenulate. Spire straight- 

 sided, the apex obtuse. Whorls 9^, slightly convex. Aper- 

 ture narrow, acutely angular above, a little receding and 

 very narowly rounded at the base, subangular at junction of 

 basal and columellar margins. Columella convex, dilated and 

 revolute above, rapidly tapering below, and obliquely trun- 

 cate by the receding basal margin. Length 49, diam. 19.5, 

 length of aperture 20 mm. 



West Africa (type no. 78486 A. N. S. P.). 



The sparse, very narrow streaks of the last two whorls and 

 the very narrow aperture are characteristic. An abnormal 

 specimen in the type lot is somewhat larger. 



5. L. TRYONIANA Pilsbry, n. sp. PL 8, fig. 46. 



Shell nearly imperforate, long-turrite, thin but strong,. 

 uniform straw-yellow. Surface nearly smooth, slightly stri- 

 ate, showing some faint traces of decussation on the spire, 

 and a little puckered below the suture. Whorls 7^, the 

 upper ones slowly increasing and moderately convex, the last 

 three rapidly widening and quite convex. Aperture oblique, 

 whitish inside, the basal margin receding, the columella 

 strongly twisted in a spiral fold, the columellar margin widely 

 reflexed and adnate above. Length 58, diam. 21.5, length of 

 aperture 23.5 mm. 



This species differs from all others known to me by the 

 spirally entering columella. Described from a single speci- 

 men of unknown locality, but received with various West 

 African species. 



