CHEMNiTZIA. 415 
laria basi coalita, lateribus membranaceis, apicibus lobis minutis, 
aut simulantibus, instructis. Oculi, ad basin centralem vel in- 
ternam tentaculorum immersi. Pes characterem nullum constan- 
tem exhibens. 
Testa spiralis, levis, vel costata, vel lineis spirata, aut decussata, 
anfractibus tribus ad octodecim instructa ; apertura ecanaliculata ; 
latus columnare denticulo seepe munitum, seepe muticum. Apex, 
in gyrum sequentem reflexus. Operculum corneum, vel subtes- 
taceum, subovale, striis ellipticis notatum, subspiratum, ared 
inferiori sub nucleo, apophysi semper instructa. 
C. pattipa, Mont. certé. 
Odostomia eulimoides, Brit. Moll. ii. p. 272, pl. 95. f. 1, 2, 3. 
O. ? pallida, Brit. Moll. iti. p. 307, pl. 98. fig. 4, and iv. p. 274. 
O. notata, O. albella, O. dubia, O. alba, O. nitida, O. rissoides, 
O. eulimoides, O. glabrata, auct. variorum”. 
. dubia, Brit. Moll. iii. p. 276, pl. 94. f.8, and iv. p. 279. 
. alba, Brit. Moll. in. p. 278, pl. 96. f. 9. 
. nitida, Brit. Moll. ui. p. 280, pl. 94. f. 6. 
. glabrata, Brit. Moll. iii. p. 283, pl. 98. f. 3. 
. rissoides, Brit. Moll. iu. p. 284, pl. 96. f. 4 (5, var. albella), and iv. 
p: 2/79. 
S590; 9°9"'9 
Animal of six spiral turns; mantle plain. Foot short, trun- 
cate in front, slightly auricled, but not emarginate or hollowed 
out in the centre, as in its congener below, Chemnitzia acuta ; 
rounded posteriorly, and terminating suddenly im a_ short 
point ; it is powdered on its upper surface with pale gold- 
coloured minute poits, and in some specimens with sulphur- 
yellow dots; beneath the same colours prevail, though less 
intensely: it has a light corneous, simple, not spiral, suboval 
operculum. The organ above the foot, and under the tenta- 
cula, termed by us the rostrum, and by others the mentum, is 
marked on each side with a pale yellow longitudinal lne; on 
the quiet march it is short, thick, flat, slightly bevelled at the 
sides, truncate and dilated at the extremity; but when the 
animal is disturbed, it presents many phases of figure, which, 
without great care, may occasion discrepancies in the de- 
* Figures of most of these varieties may be seen in that valuable vade 
mecum, the * British Mollusca.’ 
