Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . B Fig. 250. MenabitesiDelawarella)subdelawarensisCo\\ignon,l94S. SAM-PCZ5901. Giganticspecimen still fully septate, x 0,46. (See also Figs 248-249.) CRETACEOUS FAUNAS FROM SOUTH AFRICA 329. Fig. 251. Menabites {Delawarella) subdelawarensis Collignon, 1948. SAS-Z2100. X 0,63. The keel throughout is broad and low, and eventually becomes veryindistinct at large diameters. The suture line is blocky with minutely frilled terminations, though detailsare somewhat obscured by weathering and calcitic encrustation (Fig. 247B).T
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . B Fig. 250. MenabitesiDelawarella)subdelawarensisCo\\ignon,l94S. SAM-PCZ5901. Giganticspecimen still fully septate, x 0,46. (See also Figs 248-249.) CRETACEOUS FAUNAS FROM SOUTH AFRICA 329. Fig. 251. Menabites {Delawarella) subdelawarensis Collignon, 1948. SAS-Z2100. X 0,63. The keel throughout is broad and low, and eventually becomes veryindistinct at large diameters. The suture line is blocky with minutely frilled terminations, though detailsare somewhat obscured by weathering and calcitic encrustation (Fig. 247B).The lateral lobe (L) in SAS-Z2100 is wide and asymmetrically trifid, and deeperthan the external lobe. 330 ANNALS OF THE SOUTH AFRICAN MUSEUM Discussion Comparison of the Zululand material with that described from Mada-gascar by Collignon (1948, 1970) is difficult due to great differences in size, thelargest described specimen from Madagascar (Collignon 1970: 68) being only166 mm in diameter compared to the smallest Zululand specimen at 221 mmdiameter. Nevertheless, the massive whorls, and generally coarse ornament ofthe Zululand specimens compare well with the Madagascar material. The closest ally to M. {D.) subdelawarensis is undoubtedly M. {D.)]eanneti,whi
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
