Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . 100 I Fig. 256. Menabites {Delawarella) gigas sp. nov. Holotype SAM-PCZ5900. x 0,23. Scale bar in millimetres. CRETACEOUS FAUNAS FROM SOUTH AFRICA 337 reminiscent of M. {Australielld) falloti (see p. 315), which occurs at the samestratigraphic level. Ornament here consists of low, single ribs, each bearing adistinct umbilical (1) tubercle, but low, rounded and indistinct lateral (2),submarginal (3), and marginal (4) tubercles. The body chamber, which is partially preserved on the holotype (Fig. 256)and SAS-Z1951 (Fig.

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Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . 100 I Fig. 256. Menabites {Delawarella) gigas sp. nov. Holotype SAM-PCZ5900. x 0,23. Scale bar in millimetres. CRETACEOUS FAUNAS FROM SOUTH AFRICA 337 reminiscent of M. {Australielld) falloti (see p. 315), which occurs at the samestratigraphic level. Ornament here consists of low, single ribs, each bearing adistinct umbilical (1) tubercle, but low, rounded and indistinct lateral (2),submarginal (3), and marginal (4) tubercles. The body chamber, which is partially preserved on the holotype (Fig. 256)and SAS-Z1951 (Fig. 257), is enormous, comprising at least half a whorl. Alllateral ornament is here effaced, and on the holotype this even affects theumbilical tubercles. The suture is imperfectly known, but includes a very wide, asymmetricbifid lobe (L) (Fig. 258).. Fig. 257. Menabites (Delawarella) gigas sp. nov. Paratype SAS-Z1951. x 0,45. 338 ANNALS OF THE SOUTH AFRICAN MUSEUM

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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory