( 56 ) 
DIVISION XVII. SYPHONOSTOMATA. 
GENERA. ah 
A. With varices. (1) 
4, Murex. (2) Lam. 
Oval or oblong; turbi-  Varicesintwo opposite Marine. 
nated, canal projecting rows. VY. Animal, p. 70. 
and straight ; operculum 
horny. 
a Murex, Montf. Canal long and slim ; varices spinous. PI. 10, fig. 3. 
6 Brontes, Montf. Canal long and slim; varices knotty. 
c Typhis, Montf. Canal moderate ; varices spinous, with projecting tubes 
between, penetrating thé shell. Pl. 12, fig. 7. 
d Chicoracexe, Montf. Canal moderate or long, with folded leaves notched 
or divided. PI, 10, fig. 5. 
e Aquila, Montf. Canal moderate or short; varices knotty; umbilicate. 
f. Usionam, Montf. Canal moderate or short ; varices knotty; not umbi- 
icate. 
g Tritonium, Montf. Canal moderate or short; varices simple; spire ele- 
vated ; mouth generally wrinkled transversely on both lips. Pl. 10, fig. 4. 
h Trophones, Montf. Canal moderate or short; varices numerous, com- 
pressed, almost membranous. 
t Canal moderate or short; varices few, very much 
compressed, projecting considerably. 
2. Ranrtra. Lam. 
Turbinated; canalshort;  Varices bordering both Marine. 
surface armed with tuber- sides. V. Animal, p. 70. 
cles; lips of the mouth 
wrinkled. Pl. 40, fig. 6. 
a. Apollo, Montf. Umbilicate. 
B. Without varices. 
3. Fusus. (3) Lam. 
Fusiform, peristomaen-  Columella simple. Marine. 
tire ; spire elevated. VY. Animal, p. 70. 
a. Fusus, Montf. Umbilicate. 
b. Lathires, Montf. Not umbilicate. Pl. 10, fig. 7. 
‘ 
(1) Varices are projecting callous pads with which the animal edges the mouth 
or aperture of its shell, each time that it suspends the growth. V. Pl. 10, fig. 2, 
a, b.c.d.e. 
(2) Foss. in the London Clay; Crag Marl; Woolwich Loam; Green Sand; at 
Grignon, Courtagnon. The Murew& tripteris, living in the Indian Seas, near Batavia, 
is very common at Grignon. 
(3) Foss. in the London Clay. In France they are found in the newest Shelly Lime- 
stone, and are much more abundant in that than in any other formation. Although 
the fossil species are numerous, we meet with scarcely any which are perfectly 
analogous to those now found in the recent state. These remarks also apply to 
the Fasciolaria, A 
