. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. 884 BRACHIOPODA. [ TKH. in the (lorHal; beaks incurved, tub- e(|iiiil; Hurfact) rndinted, (orminR inter- loclcing anKiilar itrojections at their terminationH; Hhell ntructure punctate. Type 8. FiQ. —Hyntrlelainia liomlpllcHttiin. /, Dental lainlno); 7/t, nieNlal fleptuin. hemiplicatum, Hall, 1852, (Spirifera hetni- plicata,) Stan.'s Ex. to Great Salt Lake, p. 400, Coal Meas. Byringotiiyr
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. 884 BRACHIOPODA. [ TKH. in the (lorHal; beaks incurved, tub- e(|iiiil; Hurfact) rndinted, (orminR inter- loclcing anKiilar itrojections at their terminationH; Hhell ntructure punctate. Type 8. FiQ. —Hyntrlelainia liomlpllcHttiin. /, Dental lainlno); 7/t, nieNlal fleptuin. hemiplicatum, Hall, 1852, (Spirifera hetni- plicata,) Stan.'s Ex. to Great Salt Lake, p. 400, Coal Meas. Byringotiiyris, Winchell, 1863, Proc. Acad. Nat. Sci., p. 6. [Ety. «j/nnx, a tube; ihym, a window.] General aspect like Spirifera; shell fibrous and impunctate; beak extremely elevated; area of ventral valve large, with a nar- row triangular fissure closed toward the apex by an external, convex pseudo- deltidium, beneath which, and di- verging from it, is another transverse plate, connecting the vertical dental lamellae, arched above, and beneath givinji: ofiT a couple of median parallel lamellse, which are incurved so as to nearly join their inferior edges, thus forming a nlit-bearing tube, which pro- jects into the interior of the shell. Type S. typus. halli, Winchell, 1863, Proc. Acad. Nat. Sci., p. 8, Marshall Gr. typus, Winchell, 1863, Proc. Acad. Nat. S'o'i. Pliil., p. 7, Marshall Gr. TBRKBRATULA;Llhwyd,il60O, Lith. Brit. Ichn. [Ety. diminutive of Ure- bratus, perforated.] Shell variable in form, oval, elongated or transverse; smooth or plicated; valves un- equally convex; binge- line curved; beak short, truncated by a foramen; deltid- ium in one or two pieces; loop short; confined to the posterior portion of the shell, not more than one-third the length of the valve, simply attached to a hinge plate; two ribbon-shaped la- mellse are united by a transverse lamella bent upward in the middle; the cirrated arms are supported by the crura, and project in front of the loo
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
