CHEMNITZIA. 447 
at one time I thought it a variety of that species, but the 
different disposition of the spiral striz, the more oblique ribs 
and hollowed-out volutions in the C. excavata, show that the 
C. Barleei is distinct, though most closely allied to it. The 
apex of C. excavata is reflexed precisely as in this species. 
This character with me, as regards the Chemnitzie, is of great 
value; in that tribe the decidedly reflexed apex, or the sunken 
subreflexed one, I never found absent. But the examples 
must be fresh and perfect—not the usual cabinet ones ground 
to button-lke apices by attrition; but even in these the 
practised eye will detect the true character. The fold on the 
pular-lip of the C. excavata is sometimes present, and at 
others absent. I believe this remark holds good in this spe- 
cies; but im my specimens from Mr. Barlee it is distinctly 
visible, though very small, and far retired within the aperture. 
Cu. nitipisstma, Mont. et Auct. 
Aclis nitidissima, Brit. Moll. ui. p. 223, pl. 90. f. 6, 7. 
Though the animal of this elegant minute shell remains 
undiscovered, still the mversion of its apical turns on the 
succeeding volution is so excellent and faithful a characteristic 
of the Chemnitzie (of which I am not aware of an instance of 
failure), that I am induced, without hesitation, to consider 
this species as a member of that genus, and I confidently 
expect that, when the animal is déterré, it will support me in 
the step Ihave taken. This character, which I think of great 
value as a conchological aid, is far preferable to the unstable 
columellar fold. 
Cu. excavata, Philippi. 
Odostomia excavata, Brit. Moll. ii. p. 305, pl. 97. f. 3, 4. 
This species has not been met with alive, though the shell, 
in excellent condition, has been taken at Exmouth. 
Cu. Scritum, Scacchi. 
Eulimella Scille, Brit. Moll. iii. p. 309, pl. 98. 2. 5, 6 (animal) 
PLR SEL: 
This species does not inhabit the Devonshire coasts. 
