( 58 ) 
DIVISION XIX. ENTOMOSTOMATA. 
A. Turreted. 
4. Esurna. Lam. — Nf 
Shell smooth. Pl. 10. 
fig. 9 
2. ANCILLARIA. (1) Lam. 
ANCILLA. 
Oblong, spire short. 
Pl. 40, fig. 10. 
3. Mirra. (2) Lam. 
ri Turreted or sub-fu- 
siform; spire pointed , 
mouth oblong. Pl. 10, 
fig. 44 
4. Pyramipenra. Lam. 
Mouth broad, crescent 
shaped. Pi. 10, fig. 12. 
5. ‘Terepra. (3) Brug. 
Spire atleast double the 
greater diameter of the 
mouth : no operculum. 
PL. 10, fig 20. 
6. Crriruium. (4) Brug. 
Mouth oval, curved to 
the left at the notch: oper- 
culum round and horny. 
GENERA. 
Columella deeply and 
broadly umbilicate. 
A callous pad on the 
base of the columella. 
Columella with large 
folds, the largest nearest 
the spire. 
Columella with the 
base twisted obliquely 
in sharp, spiral folds. 
Columella convex or 
naked, the visible part 
very short. 
A gutter in the upper . 
part of the right lip. 
Marine. 
V. Animal, p. 69. 
Marine. 
Marine. 
Warm climates. 
VY. Animal. p. 69- 
Marine. 
V. Animal, p. 63. 
Marine. 
VY. Animal, p. 70. 
Marine. 
V. Animal, p. 70. 
a. With varices, but no fold on the columella. 
b. With folds on the columella. Pl. 13, fig. 2. 
e. No folds on the columella; no varices. Pl. 10, fig. 19. 
(4) Foss. in the London Clay; at Grignon; Courtagnon; Environs of Paris. 
(2) Foss. at Grignon; Parnes near Magiiy. 
(3) Foss. at Grignon; Parnes. 
(4) This genus of univalves presents more species in the fossil state than any 
other. There are already upwards of a hundred in the cabinet of M. De France: 
they are almost all found in the newest formations. M. de Gerville, however, re- 
ports that he has found four species in the bed of Ammonites and Belemnites, in the 
environs of Bayewx.—Journal de Physique, October, 1813. They have been found 
in England, in the London Clay and in the Chalk Marl. The Cerithium Gigas, 
pl. 13, fig. 2, is sometimes from fifteen to sixieen inches long, and four in diameter 
at the last whorl. 
