Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 5. Ancyloceras {Adouliceras) sp. cf. ajax Anderson, 1938. SAS Zo(n) from locality 162,Mfongozi Creek, Zululand, Lower? Aptian. x 0,4. but it appears that the ribs crossed the venter without diminution. There areabout 25 ribs in a distance equal to the whorl height. At a point 70-80 mmbefore the bend in the crozier, strong ribs appear, becoming progressivelystronger towards the bend. Umbilical, lateral and ventral tubercles develop onthe major ribs. The major ribs cross the flanks radially and curve forward overth
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 5. Ancyloceras {Adouliceras) sp. cf. ajax Anderson, 1938. SAS Zo(n) from locality 162,Mfongozi Creek, Zululand, Lower? Aptian. x 0,4. but it appears that the ribs crossed the venter without diminution. There areabout 25 ribs in a distance equal to the whorl height. At a point 70-80 mmbefore the bend in the crozier, strong ribs appear, becoming progressivelystronger towards the bend. Umbilical, lateral and ventral tubercles develop onthe major ribs. The major ribs cross the flanks radially and curve forward overthe venter, but are effaced on the dorsum. 228 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 6. A. Whorl section of A. {Adouliceras) sp. cf. ajax Anderson, 1938. SAS Zo(n). x Whorl section of Australiceras wandalina sp. nov. UPG B8 from Manyola Drift, Aptian III. x 0,5. Dimensions Wb 80 101,5 89,5 Wh 92,5 91,6 97,0 End of shaft. In crozier. Aperture Discussion The specimen bears a strong resemblance to the Californian Ancylocerasajax, but lacks the inflated body chamber and the very strong tuberculationon the crozier. Ancyloceras thomeli Murphy (1975: 24, pi. 3 (figs 1, 5), pi. 11 (figs 1-2)) alsodiners on account of the presence of an inflated body chamber. In A. {Ad.) renauxianum dOrbigny (1842: 499, pi. 123) non-tuberculateintermediaries occur between the major costae in the crozier. A. {Ad.) ewaldiDames (1880: 690, pi. 25, pi. 26 (fig. 1)) has stouter ribbing on the shaft, andmore closely spaced ribs on the crozier. A. {Ad.) adouli Astier (1851: 23, pi. 6(nr 12); pi. 7 (nr 12b); see also Thomel 1964, pi. 9 (fig. 2)) has a strongly inflatedbody chamber and is rea
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
