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a. COMMON AWNING CLAM, Solemya
velum Say, % inch (Nova Scotia to
Florida), p. 333.
b. SHORT YOLDIA, Yoldia .sapotilla Gould,
1 inch (yVrctic to North Carolina),
p. 340.
c. POURTALES' GLASS SCALLOP, Propeamiissium
pourtalesinninn Dall, '2
inch (off Florida), p. 369.
d. MYALLS YOLDIA, Yoldia myalis Couthouy,
1 inch (Arctic to Cape Cod), p. 340.
e. BROAD YOLDIA, Yoldia thraciaeformis
Storcr, 2 inches (Arctic to North Caro-
lina; also Alaska), p. 340.
f. SULCATE LIMOPSIS, Limopsis sulcata
V. and B., 3^ inch (Massachusetts to
West Indies), p. 347.
g. UNDULATE BITTERSWEET, Glycyrneris
undata L., 2 inches (North Caro-
lina to West Indies), p. 348.
h. DECUSSATE BITTERSWEET, Glycymeris
decussata L., 2 inches Florida and
West Indies), p. 348.
i. COMB BITTERSWEET, Glycymeris pectinata
Gmelin, ^4 inch (North Carolina
to West Indies), p. 348.
j. MOSSY ARK, Area umboiiala Lamarck,
2 inches (North Carolina to West In-
ches), p. 342.
k. DOC BALES' ARK, Barbatia tenera C. B.
Adams, 1 inch (Florida and West In-
dies), p. 343.
1. ICELAND SCALLOP, CJdamys islaudica
Midler, 3 inches (Arctic to Massa-
chusetts; also to Washington), p. 365.
m. ATLANTIC DEEPSEA SCALLOP, Placopecten
magellanicus Gmelin. 9 inches
(Labrador to North Carolina), p. 366.
Plate 27
ATLANTIC COAST BIVALVES
n. TURKEY WING, Area zebra Swainson,
3 inches (North Carolina to West In-
dies), p. 342.
o. CUT-RIBBED ARK, Anadara lienosa fieri
da ji a Conrad, 4 inches (North Caro-
lina to Texas), p. 344.
p. EARED ARK, Anadara notabilis Roding.
2 inches (Florida to Brazil), p. 344.
q. RED-BROWN ARK, Barbatia cancellaria
Lam., 1 inch (Florida and West Indies),
p. 343.
r. WHITE BEARDED ARK, Barbatia eandida
Helbling, 2 inches (North Caro-
lina to Brazil), p. 342.
s. TRANSVERSE ARK, Anadara transversa
Say, 1 inch (Cape Cod to Texas), p. 345.
t. BLOOD ARK, Anadara ovalis Brug., 2
inches (Cape Cod to Texas and West
Indies), p. 345.
u. WHITE MINIATURE ARK, Barbatia
doniingensis Lam., j/2 inch (North Ca-
rolina to West Indies), p. 343.
V. SAW-TOOTHED PEN SHELL, Atrina
serrata Sby., 6 inches (North Carolina
to Florida), p. 360.
w. AMBER PEN SHELL. Pinna earnea
Gmelin, 5 inches (Florida and West
Indies), p. 360.
X. STIFF PEN SHELL, Atrina rigida Solander,
7 inches (North Carolina to West
y.
Indies), p. 360.
INCONGRUOUS ARK, Anadara brasiliana
Lam., 2 inches (North Carolina to
Texas to Brazil), p. 346.
z. PONDEROUS ARK, Noetia ponderosa
Say, 2 inches (Virginia to Texas), p. 346.