Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . (-) 46,5(100) 14,1(30,3) 20,0(43,0) 0,71 13,2(28,3) 36,6(100) 11,1(30,3) 16,0(43,7) 0,69 10,0(27,3) Description The holotype is a wholly septate internal mould, somewhat corroded onthe ventral region of the outer whorl; the estimated maximum diameter isapproximately 75 mm. The smallest diameter at which the specimen can be examined is 17 mm(Fig. 4). At this size the coifing is rather involute, half the previous whorl beingcovered. The whorl section is compressed (whorl breadth to height ratio is 0,8),with the greatest
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . (-) 46,5(100) 14,1(30,3) 20,0(43,0) 0,71 13,2(28,3) 36,6(100) 11,1(30,3) 16,0(43,7) 0,69 10,0(27,3) Description The holotype is a wholly septate internal mould, somewhat corroded onthe ventral region of the outer whorl; the estimated maximum diameter isapproximately 75 mm. The smallest diameter at which the specimen can be examined is 17 mm(Fig. 4). At this size the coifing is rather involute, half the previous whorl beingcovered. The whorl section is compressed (whorl breadth to height ratio is 0,8),with the greatest breadth at the umbifical buUae. The flanks are flattened andconvergent, the ventrolateral shoulders narrowly rounded, and the venterfastigiate. There are twelve prominent umbilical bullae per whorl; these giverise to pairs of low, broad prorsiradiate ribs strengthened into an obfiqueventrolateral clavus from which they sweep forward across the ventrolateralshoulder, declining as they do so. There is an initially entire siphonal keel 248 ANNALS OF THE SOUTH AFRICAN MUSEUM. ^... ^ f.
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Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
