. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . slightly offset, one above the other in a line parallel to the axisof coiling. Discussion Kaplan & Schmid (1988: 52) described the extent of variation in the upper Turonian topossibly basal Coniacian species E. (E.) saxonicum, and discussed the difficulty ofseparating it from allied species such as E. (E.) indopacificum and E. (E.) muramotoiMatsumoto, 1967. In terms of rib density, closely coiled Turonian-Coniacian species ofEubostrychoceras can be arranged from coarsely costate E. (E.) matsumotoi Cobban, 1987 with
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . slightly offset, one above the other in a line parallel to the axisof coiling. Discussion Kaplan & Schmid (1988: 52) described the extent of variation in the upper Turonian topossibly basal Coniacian species E. (E.) saxonicum, and discussed the difficulty ofseparating it from allied species such as E. (E.) indopacificum and E. (E.) muramotoiMatsumoto, 1967. In terms of rib density, closely coiled Turonian-Coniacian species ofEubostrychoceras can be arranged from coarsely costate E. (E.) matsumotoi Cobban, 1987 with 20 to 30 ribs per whorl, through E. (E.) indopacificum with 50 to 55 per whorl,to E. (E.) saxonicum with 30 to 80 per whorl. In terms of rib density, our specimens clearlyconnect with E. (E.) indopacificum and E. (E.) saxonicum. The spacing of theconstrictions is similar to that of E. (E.) muramotoi Matsumoto 1967. Our material is bestreferred to E. (E.) indopacificum. Occurrence Coniacian of Japan, India, Madagascar, and KwaZulu. 226 ANNALS OF THE SOUTH AFRICAN MUSEUM.
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