478 
BULLETIN OF THE UNITED STATES FISH COMMISSION, 
Abra lioica Dali. 
Syndosmya l-ioica Dali, Bull. Mus. Comp. Zool., ix, p. 133, 1881. 
Abra lioica Dali, Blake Report, i, pi. iv, fig. 8, 1886. 
Shell subquadrangular, thin, rather inflated, with full, prominent beaks, with faint growth strife; 
smooth, whitish, and shining; posterior end subtruneate from above, and the beaks are considerably 
nearer to this end; the shell is faintly flexed to the right behind; the anterior end is broadly 
rounded; left valve with one strong cardinal and a small one behind, with no laterals; right valve with 
two rather strong, divergent cardinals and no laterals. 
Length, 7; height, 4.5; diameter, 3.5 mm. 
Mayaguez. Porto Rico. 
More inequilateral and inflated, and with higher beaks than A . a: i/uaHs, and a polished species. 
Abra longicallus Scacchi. 
Tellina longicallas Scacchi, Notiz., p. 16, pi. i, fig. 7, 1836. 
Shell elongately sul (triangular, thin, subcompressed, nearly equilateral, the beaks a little nearer 
to the posterior end, which is bluntly pointed and turned a little to the left; surface with delicate 
incremental strife and faint vestiges of radial strife; smooth and shining, straw-colored; there is a faint 
lunule in front, and the low, almost sharp, posterior ridges inclose a slight depression behind, in which 
is situated the small ligament; there is a single somewhat bifid cardinal in the left valve and vestiges 
of two laterals; the right valve has two divergent cardinals and two well-developed laterals; behind 
the beaks there is a short nymph; resilium small. 
Length, 25; height, 17; diameter, 8 mm. 
Mayaguez, Porto Rico. 
Genus CUMINGIA Sowerby, 1833. 
Shell triangular or transversely oval, rounded in front, subrostrate and slightly gaping behind, 
sometimes a little irregular, generally sculptured with concentric lamelke, fiexuous behind; hinge 
with a small cardinal in each valve and two elongated laterals, having a spoon-shaped resilium pit; 
pallial sinus wide. 
Cumingia (tellinoides Conrad, var.?) coarctata Sowerby. 
Ca mingia tellinoidcs Conrad, Journ. Acad. Nat. Sci. Phila., vi, p. 258, pi. ix, figs. 2,3,1830. 
Camingia coarctata Sowerby, P. Z. S., 1833, p. 34. 
Shell often irregular, with the dorsal and basal lines nearly parallel, the anterior end rounded, 
the posterior end obliquely truncated from above, ending at the posterior base in a blunt point, 
subsolid, subinflated, gaping a little behind; posterior ridge well defined, rounded; the ligament is 
scarcely discernible; the surface is covered with raised concentric threads or lamellae, whitish; beaks 
pointed, a little nearer the posterior end; under the beaks in each valve there is a spoon-shaped 
resilium pit; in front of it in the left valve is a compressed cardinal, and there are two faint laterals 
in this valve; right valve with a double cardinal behind the pit and having two strong laterals. 
Length, 21; height, 14; diameter, 8 mm. 
San Juan Harbor, two young valves. 
The variety is confined to the Antilles and may eventually lie proved to be a. distinct species. 
Family TELLINID7E. 
Genus TELLINA (Linnaeus, 1758), Lamarck. 
Shell snbequi valve, rather compressed, suborbicular or transversely elongated, obliquely flexed 
behind; beaks subcentral; hinge with two cardinals and generally two laterals in' each valve, one 
lateral anterior and one posterior, the laterals most distinct in the right valve; pallial sinus wide and 
deep; ligament external, prominent. 
Section LIOTELLINA Fischer. 
Tellina radiata Linnaeus. 
Tell ina radiatu Linnaeus, Syst. Nat., ed.x, p.675, 1758; Sowerby, Conch. Icon., xvn, pi. in, tig. 86, 1866. 
San Juan; Aguadilla, Porto Rico (Gundlach). 
