. Cambrian Brachiopoda. Brachiopoda, Fossil. OBOLID^. 403 all other species of the genus known to me. Seven specitaens were collected from a shaly compact limestone, all as casts. Remnants of the corneous shell are preserved, which show it to have been very thin, and the interior casts show that it did not retain any impressions of the animal sufficiently strong to be impressed on the cast- A short, rather narrow cardinal area occurs on both the ventral and dorsal valves. Outer surface smooth, with a few lines of growth. The largest ventral valve has a length A of 17 mm. and a width of 22 mm.
. Cambrian Brachiopoda. Brachiopoda, Fossil. OBOLID^. 403 all other species of the genus known to me. Seven specitaens were collected from a shaly compact limestone, all as casts. Remnants of the corneous shell are preserved, which show it to have been very thin, and the interior casts show that it did not retain any impressions of the animal sufficiently strong to be impressed on the cast- A short, rather narrow cardinal area occurs on both the ventral and dorsal valves. Outer surface smooth, with a few lines of growth. The largest ventral valve has a length A of 17 mm. and a width of 22 mm. A less distorted dorsal F'°u^e «s menhranaceus waicott. a, . Cast of ventral valve (U. S. Nat. Mus. Cat. No. valve has the same length and width, 15 mm. 53674a). b, cast of dorsai vaive (u. s. Nat. mus. The specific name was given because of the very thin cat. No. o3674b). Both natural size. 1 , 1 1 11 The specimens represented are from Locality 3Sb, almost membranaceous shell. Eldon limestone on Mount Bosworth, British Co. FoHMAxroN ANO .^Middle Cambrian (35g): About 4,100feet "; ^^ ^Z:^^X^:t^^'' (1,250 m.) above the Lower Cambrian and 860 feet (262 m.) below the Upper Cambrian in the Bhaly limestones in No. 2 of the Eldon limestone,.at the north end of the amphitheater north- west of the main ridge of Mount Bosworth, north of the Canadian Pacific Railway between Hector and Stephen, on the Continental Divide, between British Columbia and Albertaj Canada. ObOLUS ? MENEGHINII Walcott. Plate XXX, figures 17, 17a. Not Lingula petalon (Hicks MS.) Davidson, 1868, Geol. Mag. vol. 5, p. 308, PL XV, fig. 16. (Not taken up in this monograph.) Not Lingula petalon Davidson, 1871, British Fossil Brachiopoda, vol. 3, pt. 7, No. 4, p. 337, PL XLIX, fig. 30. (Not taken up in this monograph.) Lingula petalon Boknemann [not Davidson], 1891, Nova Acta Acad. Cass. Germanica Natura Curiosorum, Bd. 56, No. 3, p. 438, PL XIX (XXXIV), figs. 12-14. (Described in Ger
Size: 2308px × 1082px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1912
