AUEICULIDiE. 87 



Cassidula Kraussi, Pfr. Syn. Auric, n. 115 ; Hon. Auric, p. 113. 

 Hab. Natal, South Africa. 



9. Cassidula lutescens. 



Shell imperforate, somewhat fusiform, solid, slightly furrowed 

 longitudinally, yellowish, covered with a coar.se periostraca; 

 spire conic, with the outlines rather convex and the apex 

 pointed ; suture impressed ; whorls nine, the upper ones flat, the 

 following marked with two furrows beneath the suture, the last 

 forming about three-fifths of the total length, attenuated in 

 front; parietal plaits two, the upper one slight, compressed, 

 oblique, the other larger, below the middle, nearly transversal, 

 continued externally into a compressed and elevated crest, which 

 surrounds a middle-sized, excavated umbilical space ; columellar 

 plait acute, produced externally to the margin ; aperture rather 

 oblique, oblong, acuminated ; peristome thickened, spreading ; 

 right margin furnished within with a white callus, which is 

 emarginate above and bidentate at the lower part ; columellar 

 margin rather dilated. Length 11, breadth 5^ mill. 



Cassidula lutescens, Pfr. Mm. Auric, p. 113. 

 Hab. ? 



10. Cassidula sulculosa. 



Shell sublimate, ovate, thick, striated and seulptm'ed with 

 crowded spiral grooves, scarcely shining, blackish-brown, gTey- 

 ish-fulvous or whitish, sometimes banded ; spire conoidal, rather 

 pointed, sometimes eroded; whorls eight, fiat, indistinct, the 

 last forming about two-thirds of the total length, slightly an- 

 gled above, gradually attenuated towards the base ; basal keel 

 elevated, surrounding a middle-sized umbilical region; aper- 

 ture scarcely oblique, oblong, narrowed above the middle; 

 parietal plaits two, the upper small, nodiform, the other placed 

 on the middle, compressed, ascending obliquely; peristome 

 much thickened externally ; right margin arouately cut out at 

 its upper and inner part, then bearing a longitudinal tooth 

 reaching to the base; columellar margin dilated, spreading, 

 bearing a longitudinal plait. Length 10, greatest breadth 

 9| mill. 



Auricula (Cassidulus) sulculosa, Moms. Jar. Moll. p. 45. t.5. f.8. 

 Cassidula sulculosa, //. and A. Adams in Proc. Zool. Sue. 1854, 

 p. 31 ; Gen. rec. Moll. ii. p. 239. 



Pfr. Syn. Auric, n. 11(5; Mon. p. 114. 

 Hab. Java (Zollinger) j Bureas, Philippine Islands (II. Cuming). 



