Bulletins of American paleontology . MACTRA SIMILIS.—SAY. Shell thin, of a medium size, margins sub-equal, concentric,striae very fine, at intervals deep, beaks nearly central. Theliving ones of the coast have a longitudinal rounded ridgerunning from the beaks to the base and obscure radiatinglines, though only visible in a lavorable position. GNATHODON GEAYII.—(Fig. 226a.) Shell rather thick, sub-triangular, inflated, inequilateral, 208 Bulletin 249 NORTn-CAROLINA GEOLOGICAL SURVEY, 291 anterior margin rounded; posterior elongated or wedge common in the shell marl beds of Cape Fea
Bulletins of American paleontology . MACTRA SIMILIS.—SAY. Shell thin, of a medium size, margins sub-equal, concentric,striae very fine, at intervals deep, beaks nearly central. Theliving ones of the coast have a longitudinal rounded ridgerunning from the beaks to the base and obscure radiatinglines, though only visible in a lavorable position. GNATHODON GEAYII.—(Fig. 226a.) Shell rather thick, sub-triangular, inflated, inequilateral, 208 Bulletin 249 NORTn-CAROLINA GEOLOGICAL SURVEY, 291 anterior margin rounded; posterior elongated or wedge common in the shell marl beds of Cape Fear. / - J |1 Fig. FAMILY SOLENroAE.—SOLEN ENSIS. (Fig. 227a.)This common shell of the coast is swordshaped, with the anterior and posteriormaro;ins truncate.
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Keywords: ., bookcentury1800, bookdecade1890, bookidbulletinsofa, bookyear1895
