468 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Lima lima Linnaeus. 
Ostrea lima Linnaeus, Syst. Nat., ed. x, p. 699, 1758. 
Lima squamosa Sowerby, Conch. Icon., xvm, pi. ir, fig. 10, 1872. 
Shell solid, inequilateral, the anterior side straight and slightly gaping, the posterior side irregu- 
larly rounded, nearly closed; ears oblique; beaks elevated, having below them a low, triangular 
area and a triangular ligament. Surface sculptured with about thirty strong, radiating ribs, which 
are covered with large, rough, elevated scales; the ribs of the anterior and posterior portions not. so 
strong or rough as are those of the rest of the shell; within the shell the ribs show distinctly and the 
edges of the shell are strongly dentate. 
Length, 45; height, 55; diameter, 22 min. 
Mayaguez, Porto Rico. 
Lima inflata Lamarck. 
Lima inflata Lamarck, An. sans Vert., vi, p. 156, 1819. 
Limajasciata Sowerby, Conch. Icon., xvm, pi. iv, fig. 17, 1872. 
Shell very oblique, thin, inflated, with a wide, long gap before and behind, so that the valves 
touch only at the hinge and base; nearly straight in front, rounded on the base and posterior border, 
having a somewhat rounded angle about midway between the anterior base and the posterior ear; 
hinge line very oblique; area low, triangular, with a wide, triangular ligament; surface sculptured 
with rather low, delicate ribs, often with finer riblets between them, their edges somewhat roughened 
or nodulous; inner border of the shell scarcely serrate, interior showing traces of the ribs. 
Length, 32; height, 40; diameter, 25 mm. 
Mayaguez, Porto Rico; Ensenada Honda, Culebra. 
Lima hians Gmelin. 
Ostrea hians Gmelin, Syst. Nat., p. 3333, 1792. 
Lima fragilis Sowerby, Conch. Icon., xvm, pi. iv, fig. 18, 1872. 
Aguadilla, Porto Rico (Gundlach). 
Genus LIMATULA S. Wood, 1839. 
Shell equilateral, or nearly so; valves closed, small; hinge edentulous. 
Limatula subauriculata Montagu. 
Pecten subauriculata Montagu, Test. Brit. Suppl., p. 63, pi. xxix, fig. 2, 1808. 
Lima subauriculata Jeffreys, Brit. Conch., ii, p. 82; v, p. 169, pi. xxv.lig. 3. 
Limatula subauriculata S. Wood, Mag. Nat. Hist., n. s., Ill, p.236, pi. in, fig. 6, 1839. Crag Moll., II, p. 17, pi. vn.figs. 3 a-c, 1850. 
Mayaguez Harbor, Porto Rico, at station 6062, in 25 fathoms; also northward to the Arctic seas. 
Superfamily ANOMIACEA. 
Family ANOMlIDAi. 
Genus ANOMIA (Linnseus, 1758) Muller, 1775. 
Shell irregular, subcircular or oblong, often imitating the object to which it is attached; thin, 
subtransparent, the interior somewhat nacreous; left valve entire, convex, having a ligamental fossette 
below the summit and bearing four muscular impressions; right valve flat, having a large sinus on its 
upper border through which the pluglike byssus passes, and having a single muscular impression. 
Anomia simplex d’Orbigny. 
Anomia simplex d’Orbigny, Moll. Cubana, n , p. 367, pi. xxxvm, figs. 31-33, 1845. 
Shell irregular, fitting and often imitating the object to which it is attached, suborbicular, thin, 
semitransparent; left valve generally convex and thicker than the right, with an elongated ligamental 
fossette, one muscle scar just below the ligament, and three subcentral situated on an oblong callus; right 
valve generally flat or concave, with an oval opening for the byssal plug, which is surrounded by an 
oblong callus, on which there is a single muscle scar; interior of valves nacreous and shining; exterior 
having concentric scaly ridges. Color whitish, silvery, greenish straw, or pale brownish. 
Height, 35; length, 35; diameter, 7 mm. 
Mayaguez, Porto Rico. 
