37 
Terebra. — Shell elongated, turreted, very pointed at the summit: aperture longitudi- 
nal, many times shorter than the spire, notched at the posterior part of the base. 
Base of the columella twisted, or oblique. 
Plate XIX. Fig. 6. T. crenulata. (Buccinum crenulatum. — Linn.) 
COLUMELLARIA 5 Genera. 
No canal at the base of the aperture, but a more or less distinct sub-dorsal notch, and plaits on the 
columella. 
Columbella. — Shell oval, spire short, the base of the aperture more or less notched, and 
without a canal. Columella plaited : aperture contracted by a swelling on the in- 
side of the right lip. 
Plate XIX. Fig. 7. C. labiosa. (Sowerby’s Genera.) 
Mitra. — Shell turreted, sub-fusiform, the spire pointed at the summit, the base notched, 
without a canal. Columella plaited, plaits parallel, transverse, the lower ones 
smallest ; columella lip thin, and formed on the pillar. 
Plate XIX. Fig. 8. M. filosa. (Voluta filosa.— Gmel.) 
Voluta. — Shell oval, more or less ventricose ; the apex obtuse, or papillary; the base 
notched ; no canal. Columella plaited, the lower plaits largest and most oblique : 
no columella lip. 
(a) Shell ventricose, inflated, ( Cymbiolce.) 
Plate XIX. Fig. 9. V. olla. (Idem. — Linn.) 
(5) Shell oval, spinous, or tubercular, (Muricince.) 
Plate XIX. Fig. 10. V. vespertilio. (Idem. — Linn.) 
(c) Shell oval, sub-tubercular, ( Musicales.) 
Plate XIX. Fig. 11. V. musica. (Idem. — Linn.) 
(d) Shell elongated, ventricose, nearly fusiform, ( Fusoidece.) 
Plate XIX. Fig. 12. V. undulata. (V. fluetuata. — Solander’s MSS.) 
Marginella. — Shell ovate-oblong, smooth, spire short; right lip externally thickened: 
base of the aperture scarcely notched ; plaits on the columella nearly equal. 
(1) Shells with the spire prominent. 
Plate XIX. Fig. 13. M. cferulescens. (Voluta prunum.— Gmel.) 
(2) Shells with the spire not prominent. 
Plate XIX. Fig. 14. M. lineata. (Voluta persicula. — Linn.) 
Volvaria. — Shell cylindrical, convolute; spire scarcely projecting: aperture narrow, 
the length of the shell. One or more folds on the lower part of the columella. 
Plate XIX. Fig. 15. V. pallida. (Voluta pallida. — Linn.) 
