MUSEUM OF COMPARATIVE ZOOLOGY. 279 
This species is more oblique and inequilateral, more rostrated and quad- 
rangular, than A. equals Say, as figured and described by him. It does not 
gape behind, as that is said to do, nor is its pallial sinus as irregular as in 
A. cequalis, but it is more ovate and does not rise as high ; the teeth also appear 
to be stouter and wider in A. lioica. It has been obtained at many stations of 
the Fish Commission off the Carolinas, and even to the New England coast. 
It does not seem to live in more than 180 fms.; all found at greater depths 
were dead valves. 
Genus HRVILIA Torron. 
Ervilia nitens Monvtacv. 
One valve of this common West Indian shell was dredged in 7 to 50 fms., at 
Station 287, near Barbados. 
Genus CUMINGIA Sowersy. 
Cumingia tellinoides Conran. 
Cumingia tellinoides Conrad, Journ. Phil. Acad. Nat. Sci., VI. p. 258, pl. ix. figs. 2, 3, 
1830. 
Lawignon Petitiana D’Orbigny, Moll. Cuba, II. p. 236, pl. xxv. figs. 33-35, 1846. 
Lavignon antillarum D’Orbigny, I. c., p. 236, pl. xxv. figs. 36-38, 1846. 
Habitat. Station 10, in 37 fms., Gulf of Mexico, living. 
The species is variable in form. The artist has reversed one of D’Orbigny’s 
figures, so that his two figures look more unlike than they would otherwise. 
It is a common shell on the coast of the United States in comparatively shoal 
water, and from its nestling habit is generally deformed. 
Genus SEMELE Scuvumacuer. 
Semele obliqua Woop. 
Tellina obliqua Wood, Gen. Conch., t. 41, figs. 1-2, 1815. 
Amphidesma variegata Lamarck, An. s. Vert., lére éd., V. p. 490, 1818. 
One valve dredged by the ‘‘ Bache,” May 13, 1872, in 63 fms. S.W. of Gar- 
_ den Key. 
Semele cancellata D’Orstenry. 
Amphidesma cancellata D’Orbigny, Moll. Cuba, II. p. 241, pl. xxv. figs. 42-44, 1846. 
Valves were obtained in 30 fms. west of Florida. It is not rare on the 
shores of South Florida and the Antilles. 
