86 auiuculid^:. 



7. Cassidtjla labrella. 



Shell ovate-oblong, slightly striated, greyish-fulvous ; spire 

 conic, shorter than the last whorl: whorls seven to eight, 

 convex, the last attenuated at base, terminating in an oblique 

 keel surrounding the umbilicus, which is funnel-shaped, but not 

 very deep ; aperture elongate, narrow ; columella thickened, 

 bearing two rounded plaits of middle size ; right margin of the 

 peristome thick, flattened anteriorly, suddenly lessened in 

 breadth towards its upper part. Length 12, breadth 7 mill. 



Auricula labrella, Desk, in Enc. Meth. ii. p. 92. n. 15 ; Guer. Mag. 

 1830, pi. 14. 



Lamarck, Hist. ed. 2. viii. p. 337. n. 23. 



EM. Mm. Auric, p. 22. t. 2. f. 4, 5. 

 Auricula (Conovula) fabula, Ferussac, Prodr. p. 105. n. 24 ? 

 Cassidulus ? labrella, Beck, Lnd. p. 106. n. 6. 



Anton in Z. f. M. 1847, p. 170. 

 Conovulus labrella, Kiist. Auric, p. v. 

 Rhodostoma fabula, Swains. Malac. p. 344 ? 

 Cassidula labrella, Pfr. Si/n. Auric, n. 114; Mon. Auric, p. 112. 



Hab. Isle de France. 



This species seems to be nearly allied to, if not identical with, 

 the following. 



8. Cassidula Kraussi. B.M. 

 Shell sublimate, acuminately ovate, solid, rather smooth, 



slightly shining, dark brown ; spire conic, rather pointed ; su- 

 ture linear ; whorls seven, the upper ones flat, striated spirally, 

 the last forming four-sevenths of the total length, furnished 

 with an elevated crest behind the aperture, contracted ante- 

 riorly; basal keel compressed, arched, white, surrounding a 

 middle-sized periomphalum ; aperture rather oblique, narrow, 

 sinuate, not dilated in front ; parietal plaits two, the upper nodi- 

 form, very small, indistinct, the other strong, transverse ; colu- 

 mellar plait a little smaller, parallel to the other; peristome 

 rather simple, with the margins not united ; right margin bear- 

 ing within, at its upper extremity, two small teeth, and then a 

 dentiform callus, which is continued into a crest at the base ; 

 c.olumellar margin scarcely spreading. Length 13, greatest 

 breadth 7\ mill. 

 Auricula Kraussi, Kiist. Auric, p. 24. t. 3. f. 6-8. 



Earns, Siidafr. Moll. p. 82. 

 Cassidula Kraussi, Kiist. Auric, p. v. 



JL. and A. Adams in Proc. Zool. Soc. 1854, p. 31 ; Gen. rec. 

 Moll. ii. p. 238. 



