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a. QUEEN CONCH, Strojnbus gigas L., 10
inches (also young) (Florida Keys and
West Indies), p. 174.
b. MILK CONCH, Stroinbiis costatiis Gmelin,
6 inches (Southern Florida and West
Indies), p. 174.
c. AMERICAN PELICAN'S FOOT. Aporr-
hais occideriialis Beck, 2 inches (also
young) (off New England), p. 173.
d. LONGLEY'S CARRIER-SHELL, Xenophora
longleyi Bartsch, 7 inches (Gulf
of Mexico, south), p. 173.
e. CARIBBEAN CARRIER-SHELL, Xeywphora
caribaea Petit, 4 inches (off
Florida and Cuba), p. 173.
f. GIANT TUN, Tojma galea L., 6 inches
(North Carolina to Texas and West
Indies; Pacific), p. 199.
g. CROSSE'S TUN, Eiidoliiim crosseamim
Montero., 3 inches (off New Jersey to
West Indies), p. 199.
h. WEST INDIAN CROWN CONCH.
Melongeria melongejia L., 4 inches
(Florida Keys, south), p. 235.
i. KNOBBED WHELK, Biisycon carica
Gmelin, 8 inches (Cape Cod, Massa-
j.
Plate 23
ATLANTIC COAST UNIVALVES
chusetts to Northeastern Florida),
p. 235.
NEW ENGLAND NASSA, Nassarius trivittatus
Say, % inch (Nova Scotia to South
Carolina), p. 239.
k. PERVERSE WHELK, Biisycon perversiim
L., form eliceans Mont., 6 inches North-
eastern Florida), p. 236.
1. CARIBBEAN VASE, Vasum miiricatum
Born, 4 inches (South Florida and West
Indies), p. 245.
m. PYGMY COLUS, Coins pygmaea Gould,
1 inch (Quebec to off North Carolina),
p. 229.
n. CHANNELED WHELK, Biisycon canaliciilatum
L., 6 inches (Cape Cod to Northeastern
Florida), p. 236.
o. LIGHTNING WHELK, Busycon contrarinm
Conrad, 8 inches (South Carolina
to Texas), p. 236.
p. EASTERN MUD NASSA, Nassarius obsoletus
Say, % inch (Quebec to North-
eastern Florida), p. 240.
q. COMMON EASTERN NASSA, Nassarius
vibex Say, J/^ inch (North Carolina to
Texas, south), p. 237.
r. VARIABLE NASSA, Nassarius ambiguus
Pult., Yi inch (North Carolina to West
Indies), p. 239.
s. BROWN-CORDED NEPl UNE, Neptunca
clecemcostata Say, 3 inches (Nova Scotia
to Massachusetts), p. 229.
t. HAIRY COLUS, Coins pubescens Verrill,
2 inches (Quebec to off North Caro-
lina), p. 229.
u. FAT COLUS, Coins ventricosus Gray, 2V2
inches (Nova Scotia to New York), not
in text.
V. EMPEROR HELMET, Cassis madagascariensis
Lam., 9 inches (Southeastern
Florida and West Indies), p. 193.
w. LONGHORNED SMOKE SHELL. Typhis
longicornis Dall, ]/! inch (Florida and
West Indies), not in text.
X. STIMPSON'S COLUS, Coins siimpsoni
Morch, 4 inches (Labrador to off North
Carolina), p. 227.
y. FLORIDA HORSE CONCH. Pleiiroploca
gigantea Kiener, 20 inches (North Caro-
lina to Florida), p. 242.