Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 169. Texanites soutoni natalense ssp. nov. Paratype SAS-H126B/3a. Typical form. x0,82. 222 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 170. Texanites soutoni natalense ssp. nov. Paratype SAS-Z1952. Typical form, x 1. first occur in Bed B at locality 105. Suggested lines of development are outlinedin Figure 132. Submortoniceras woodsi natalense ssp. nov. may be derived protero-genetically from T. soutoni natalense forma typica; the inner smooth stage isretained for progressively longer periods of growth, accompanied

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Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 169. Texanites soutoni natalense ssp. nov. Paratype SAS-H126B/3a. Typical form. x0,82. 222 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 170. Texanites soutoni natalense ssp. nov. Paratype SAS-Z1952. Typical form, x 1. first occur in Bed B at locality 105. Suggested lines of development are outlinedin Figure 132. Submortoniceras woodsi natalense ssp. nov. may be derived protero-genetically from T. soutoni natalense forma typica; the inner smooth stage isretained for progressively longer periods of growth, accompanied by a simul-taneous reduction of umbilical width and compression. Var. inflata appears tobe sterile. As in T. soutoni soutoni, it seems possible to derive a widely umbilicate, CRETACEOUS FAUNAS FROM SOUTH AFRICA 223

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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory