download pdf

ARCIDAE 343
ment moderately developed. This species was also named Candida Gmelin,
jamaicensis Gmelin and helblingi Brug. Common, attached under stones.
Barbatia cancellaria Lamarck Red-brown Ark
Southern Florida and the West Indies.
Plate zyq
I to 1% inches in length, similar to B. Candida, but with low, cancel-
late sculpture and colored a dark, purplish brown. This is a common species
which is erroneously called B. barbata Linne (a Mediterranean species).
Subgenus Acar Gray 1857
Barbatia dontingensis Lamarck White Miniature Ark
North Carolina to Florida and the Lesser Antilles.
Plate 27U
^ to % inch in length, somewhat box-shaped, whitish in color and with
no appreciable periostracum. Similar in shape and sculpture to Arcopsis
adamsi, but instead of having a small, triangular ligament between the beaks,
domingensis has a very narrow, long ligament posterior to the beaks. The
posterior end is usually larger than the anterior end and characteristically
dips slightly downward. Common at low tide under rocks. Erroneously
called Area reticulata Gmelin by Dall and others (see Lamy and Woodring)
Barbatia bailyi Bartsch Baily's Miniature Ark
Santa Monica, California, to Gulf of California.
A little over ^ inch in length, oblong to squarish, fat; cancellate sculp-
ture in which the beads become foliate at the posterior end. Ligament small,
narrow and placed well posterior to the fairly close beaks; about 15 teeth.
Color white to brownish white.
Very common in certain localities under stones at low tide. A. pernoides
Carpenter was thought to be this shell but is apparently some other much
larger species of unknown identity.
Subgenus Fugleria Reinhart 1937
Barbatia tenera C. B. Adams Doc Bales' Ark
Southern half of Florida to Texas and the Caribbean.
Plate 27k
I to I >2 inches in length, thin-shelled, rather fat and evenly trapezoidal
in shape and with numerous rather evenly and finely beaded, thread-like ribs.
Ligamental area fairly wide at the beak end, becoming narrow at the other.
.