. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . and rib index (Ri) (ribscounted per whorl height) for figured specimens are as follows: Specimen Wb Wh Wb:Wh Ri GDI 4000 46,0 65,0 0,71 12 20,0 28,0 0,71 11 GDI 4001 24,0 32,0 0,75 12 GDI 4002 22,0 28,0 0,79 - GDI 4003 20,0 25,0 0,80 ?10 GDI 4004 14,5 18,0 0,81 10 GDI 4006 22,0 29,0 0,76 10 GDI 4007 28,0 36,0 0,78 10 PCZ18743 22,0 29,5 0,75 9 GD14008 22,5 29,0 0,76 10 GDI 4009 25,0 34,5 0,72 9 GD14010 40,0 33,0 1,21 10 Fig 5. (see facing page). Pseudoxybeloceras matsumotoi Collignon, 1965. A-C. NMB-PCZ18743 fromloca
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . and rib index (Ri) (ribscounted per whorl height) for figured specimens are as follows: Specimen Wb Wh Wb:Wh Ri GDI 4000 46,0 65,0 0,71 12 20,0 28,0 0,71 11 GDI 4001 24,0 32,0 0,75 12 GDI 4002 22,0 28,0 0,79 - GDI 4003 20,0 25,0 0,80 ?10 GDI 4004 14,5 18,0 0,81 10 GDI 4006 22,0 29,0 0,76 10 GDI 4007 28,0 36,0 0,78 10 PCZ18743 22,0 29,5 0,75 9 GD14008 22,5 29,0 0,76 10 GDI 4009 25,0 34,5 0,72 9 GD14010 40,0 33,0 1,21 10 Fig 5. (see facing page). Pseudoxybeloceras matsumotoi Collignon, 1965. A-C. NMB-PCZ18743 fromlocality 145, KwaZulu. A body chamber fragment with most of the middle nacreous layer specimen shows the typical rounded elliptical shape of the tubercles, as well as the flat fracturesurface where these have been sheared off. D-F. GD 14008 Part of the phragmocone with part of theshell preserved in recrystallized calcite. Note the absence of tubercles on the internal mould (E, F)where the shell has not been preserved. Both x 1. 210 ANNALS OF THE SOUTH AFRICAN MUSEUM.
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
