58 NEW-YORK FAUNA — MOLLUSCA. 
AURICULA DENTICULATA. 
PLATE V.- FIGS. 93 & 91. Variety. 
(STATE COLLECTION.) 
Voluta denticulata. Monrtaou, Test. Britt. p. 234, pl. 40, fig. 5. 
Auricula personata. Lamarck, An. sans vert. Ed. alt. Vol. 8, p. 334. 
A. denticulata. Govuxp, Invertebrata ef Mass. p..199, fig. 129. 
‘A, borealis? Conran, Jay’s Catalogue of Shells, No. 1991-2. 
Description. Shell thin, elongated : apex acute: spire elevated. Whorls eight, more or 
less convex; the suture towards the apex being frequently deeper than elsewhere, and render- 
ing these whorls more convex: often with a marginal line near the lower sutures. Surface 
polished, with faint incremental lines. Inner lip in the adult with three white folds or teeth ; 
the lowest formed by the fold of the base of the outer lip; the middle one largest, and the 
upper scarcely conspicuous. Umbilicus small, concealed by a fold. 
Color. Epidermis very thin, and of shining horn or greyish, often amber-colored. Animal 
yellowish. Foot bilobed in front, and divided across towards the front. 
Diameter, 0°12. Height, 0°3. 
This species appears to live exclusively in and near salt water. I have obtained specimens 
from the wharves, and others have been sent to me, dredged from the harbor of New-York. 
The borealis of Jay’s Catalogue, of an olive-green color, an elevated apex, and with slightly 
impressed sutures (fig. 91), with a thin transyerse tooth above and a small sinuous tooth 
beneath, I suppose to be a young variety of the above described species. 
(EXTRA-LIMITAL.) 
A. obliqua. (Say, Jour. Acad. Nat. Sc. Vol. 2, p. 377.) Shell obconic, rather thick; spire little ele- 
yated; whorls 8-9, wrinkled across: pillar-lip with two very distinct teeth, and slighter prominences 
between them; lower tooth very oblique, terminating at the base; lip with 8 teeth or strie, termi- 
nating on the margin; base of the aperture contracted by the basal tooth. Color, reddish brown. 
Height, 0°4. Charleston. 
