Unionidae - Truncilla Margaritana

Unionidae - Truncilla Margaritana

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ...North Carolina. Type locality, French Broad River, Asheville, N. C. Unio raz/enelianuas LEA, Tr. Am. Phil. Soc., V, 1834, p. 32, pl. 111, fig. 5; Obs., I, 1834, p. 144, pl. 111, fig. 5.--l"IANLEY, Biv. Shells, 1843. p. 187, pl. xx, fig. 59.--KUS'I'ER, Conch. Cab. Unio, 1862, p. 269, pl. xcr, fig. 1.--R1z1zv1:, Conch. Icon., XVI, 1864, pl. xv1, fig. 7o. Margarita (Unio) ra-renelicimutr L11.-, Syn., 1836, p. 22; 1838, p. 18. Margamn (Univ) fGt'81e'l'i07l!tS LEA, Syn., 1852, p. 26; I870 p. 40. Pleurobrma raveneliana SIMPSON, Syn., 1900, p. 748. Unio dc'c'i.s'us KUs'1'1-: R, (partl Conch. Cab. Unio, 1852, p. 41, pl. v111, fig. I. I placed this in the group of Plcurobema cla"z'a in the Synopsis with considerable doubt. It is an aberrant form having some of the characters of the argenteum group, but is quite solid and inflated for that assemblage. I now place it near P. mndica with some hesitation. It is larger and rather more inflated than that species and is considerably solider and much more inflated than P. pyriforme. Shell subelliptical or subrhomboid, convex, rather solid, inequilateral; beaks high but not full; posterior ridge well developed, inclined to be double, ending in a feeble biangulation below the median line; anterior end rounded; base line wel' curved; outline of dorsal slope curved, elevated to a low angle behind the ligament: surface rudely, concentrically striate; epidemiis concentrically wrinkled, reddish-brown, not shining; left valve with two pseudocardinals and two laterals; right valve with two psetidocardinals and a double lateral: muscle scars impressed: beak cavities not deep; nacre lurid flesh-color, shining. thinner behind. Length 60. height 40, diam. 22 mm. Upper...show more

Product details

  • Paperback | 426 pages
  • 189 x 246 x 22mm | 757g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236773187
  • 9781236773180