(41 ) 
DIVISION XX. ANGYOSTOMATA. 
GENERA. 
_ A. With folds, plaits, or wrinkles, on the columella. 
4. Cassis. (1) Brug. 
Oval ; mouth oblong or Columella covered with Marine. 
narrow ; thenotchtermi- a plate formed bytheleft | Generally in warm 
nating ina short canal re- lip, wrinkled transver- climates, at some dis- 
flected towards the left at sally. tance from the shore, in 
the base; right lip wrinkled sandy bottoms. 
transversally. VY. Animal, p. 70. 
a. The callous pad of the lip dentated exteriorly towards the notch. Pl. 11, 
fig. 11. 
b. The callous pad of the lip not dentated exteriorly towards the notch. 
2. Cyprza. (2) Lam. 
Oval, gibbous in the Mouth long, narrow, Marine. 
middle, and narrowed at wrinkled transversally = -Y. Animal, p. 68. 
both ends; lip rolled in- on both sides. 
wards : no epidermis. PI. ; 
41, fig. 7,9. a, b,c. 
3. Oxtva. (3) Lam. 
Sub-cylindrical; notch- _ Columella striated ob- = Marine. 
ed at the base; mouth nar- liquely. In warm climates. 
row; channels between VY. Animal,"p. 68. 
the whorls of the spire. 
Pl. 11, fig. 13, 
4. Conoerix. Swainson. 
Coniform ; spire very Columella plaited. Marine. 
_ short; mouth linear, nar- Pellew Islands, Ota- 
row. Pl. 12, fig. 1. heite. 
5. Vout. (4) Lam. 
Oval ; spire varyingin — Columella with folds, Marine. 
projection, summit obtuse the lowest the largest. Generally in warm 
or nippled. Pl. 12, fig. 2, climates. 
3, 4, 5. V. Animal, p. 68. 
a Cymbium, Montf. The last whorl ventricose 
6 Voluta, Montf. The last whorl conical, narrowing at the ends. 
s (4) The fossil species (and amongst them the Cassis Harpaformis, pl. 11, fig. 12) 
are found only in the newest formations, and it is remarkable that they are very 
small, compared with the living ones, which are sometimes of a considerable size. 
_ They have been found in England in the London Clay and in the Crag Marl. 
{2) In the infant state, the Cypra@a resembles a small thin Ancillaria, curved and 
truncated at the base, pl. 11, fig. 9, a; in the middle age, it is thin, with a project- 
ing spire, pl. 11, fig. 9, 6; when adult, it is thicker, and the spire is covered, pl. 14, 
fig 9,e. Foss. in the London Clay; at Grignon. 
(3) Foss. at Grignon; Aumont, near Montmorency. 
(4) Foss. in the London Clay ; in the Crag Marl; at Grignon ; Courtagnon ; 
Chaumont; Beauvais. 
