Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 123. Texanites texanus (Roemer, 1852). Unnumbered specimen from the Cape Townbranch of the Geological Survey. Probably referable to subspecies or variety hispanica. 164 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 124. Texanites texanus (, 1S52). SAS-H139. This specimen is best referredto subspecies or variety gallica. x 0,8. third row of tubercles in the umbilical suture. Weak lateral (2) tubercles startappearing at a diameter of c. 20 mm near the dorsal third of the flanks. Beyondthat diameter ornament remai
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 123. Texanites texanus (Roemer, 1852). Unnumbered specimen from the Cape Townbranch of the Geological Survey. Probably referable to subspecies or variety hispanica. 164 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 124. Texanites texanus (, 1S52). SAS-H139. This specimen is best referredto subspecies or variety gallica. x 0,8. third row of tubercles in the umbilical suture. Weak lateral (2) tubercles startappearing at a diameter of c. 20 mm near the dorsal third of the flanks. Beyondthat diameter ornament remains more or less the same. The only significantchange is that tuberculation becomes more prominent, and bifurcations lessfrequent, to eventually disappear completely on the body chamber. The ribs are generally straight and slightly rursiradiate throughout. Theumbilical (1) tubercles are conical to radially elongated, pointing slightlyinwards. The lateral (2) tubercles are conical on the inner whorls, but becomeprominently elongated in the direction of the ribs in later whorls. The sub-marginal (3) tubercles are conical to radially elongated, whilst the marginal (4)and external (5) tubercles are clavate. CRETACEOUS FAUNAS FROM SOUTH AFRICA 165 GSO CT differs from SAS-H139 in havi
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
