1338 
3. Papillose spire. — Voluta scapha. 
12. 
13. 
. Coneave spire, 
— The pillar lip is very broadly 
reflected on the columella, which 
is obliquely plaited. 
. Mammillated spire.—Cymba por- 
cina. 
. Decollated spire. — Volutions 
nearly flat-sided,and but slightly 
divided by the sutural line, — 
Bulinus decollatus. 
. Discoidal spire — Conus Virgo. 
. Canaliculate spire.— Volutions 
of the spire spirally surrounded 
at their base by a deep and wide 
channel. — Eburna spirata. 
. Turreted and coronated spire. — 
Fusus corona. 
. Turreted spire, with the volu- 
tions tabulated, or parallely flat- 
tened above. — Fusus scalaris. 
. Corinated spire, the volutions 
deeply divided. — Fusus colus. - 
the volutions 
sunk below the body of the shell. 
— Planorbis corneus. 
Depressed spire.— Purpura li- 
neata. 
Reversed spire. —The volutions 
winding in a contrary direction 
from the ordinary course.— 
Lymnea columna, 
APERTUBES, 
. Transversely oval aperture. — 
Stomatia inconspicua., 
. Crbicular or circular aperture,— 
Turbo smaragdus. 
. Pyriform aperture.—Phasianella 
varia. 
. Semilunar aperture. — Helicina 
festiva. See also fig 11. 
. Superiorly contracted aperture. 
— Pillar or columellar lip with 
folds or pleats. — Auricula Auris 
— Midae. 
. Longitudinally oval aperture. — 
Murex frondosus. 
Trigonal aperture. — Trochus 
zizyphinus. 
. Semicircular aperture. — Natica 
monilifera. 
. Linear aperture. — Toothed or 
denticulated on both lips. — Cy- 
prea tigris. 
. Lurned up aperture, or opening 
towards the spire, which is con- 
trary to almost all other uni- 
24, 
28, 
29. 
30 
31. 
32, 
33. 
34, 
35 
36. 
37. 
38. 
30. 
40. 
41, 
42, 
REFERENCE TO THE PLATES. 
valves, the apertures opening 
towards the base. — Anastoma 
depressum. 
OcTER Lips. 
Dentated outer lip. — Aperture 
straitened,— Rostellaria Provisiz. 
. Alated, or wingea outer lip, —a 
exhibits an enamelled extension 
of the columellar lip, which fre- 
quently covers the suture of the 
spire.—Strombus Auris—Dianae, 
orned outer lip.—This horn- 
like process is an elongation of 
the internal enamel of the shell, 
and always placed near the base 
of the outer lip. — Monoceras 
narval. 
Digitated outer lip. — These 
spinous processes always ema- 
nate from the external surface 
of the lip, contrary to the pro- 
cess in No. 26.—Ranella spinosa. 
Reflected outer lip. —Helia Sene- 
alensis. 
nternally and externally denti- 
culated outer lip. — Triton cuta- 
ceum. 
Involute and denticulated outer 
lip.—See No. 22, a. 
CoLUMELLAR OR PILLAR Lips. 
. Columellar lip with oblique 
plaits.— Turbinella umbilicarzs. 
Columellar lip with parallel 
plaits, — Cassis tuberosus. 
Tortuous pillar lip, ~ Aneillaria 
glabrata. 
CANALS AND BEAKS, 
Closed canal. — Typhis hemitrip- 
terus. 
Recurved beak.—Cerithium aluco. 
. Recurved, varicose beak.—Nassa 
Clathrata. 
Truncated beak.—Fasiolaria tra- 
pezium, 
OPERCULI. 
Multispiral Operculum. 
Articulated Operculum, 
Radiated Operculum. 
Lamellated Operculum. 
Concentric Operculum. 
Unguilated Operculum. 
EDINBURGH : 
PRINTED BY ANDREW SHORTREDE, 
GEORGE IV. BRIDGE, 
Oarded 
