Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . V. B Fig. 84. Plesiotexanites?sp. indet. SAS-76B. x 0,8. CRETACEOUS FAUNAS FROM SOUTH AFRICA 107 Dimensions D Wb Wh Wb: Wh U Int. Ext. 166,0 () () 76,0(45,8) 33 33 Description The available specimen is septate throughout, and lacks the inner is evolute, with an umbilical diameter of 45,8 per cent. The whorlsection is distinctly higher than wide, with a very shallow dorsal zone of impres-sion, widely rounded umbilical wall passing into weakly inflated flanks withoutgiving rise to a di
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . V. B Fig. 84. Plesiotexanites?sp. indet. SAS-76B. x 0,8. CRETACEOUS FAUNAS FROM SOUTH AFRICA 107 Dimensions D Wb Wh Wb: Wh U Int. Ext. 166,0 () () 76,0(45,8) 33 33 Description The available specimen is septate throughout, and lacks the inner is evolute, with an umbilical diameter of 45,8 per cent. The whorlsection is distinctly higher than wide, with a very shallow dorsal zone of impres-sion, widely rounded umbilical wall passing into weakly inflated flanks withoutgiving rise to a distinct umbilical edge, and with a narrow, rounded is weak throughout, consisting of widely spaced (c. 33 per whorl),gently forwardly curved single ribs bearing five feeble rows of umbilical (1) tubercles appear to arise in the umbilical wall, and are smalland radially elongated. The lateral (2) tubercles are smallest, conical, andsituated just dorsad of midflank. The submarginal (3), marginal (4) and external(5) rows are progressively clavate, a
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
