The Quarterly journal of the Geological Society of London . Fig. 9.—Diagram of the distal end of the cerium of a hypothe-tical Primitive Morphasmopora. Very much Lacuna in circum-apertural secondary tissue. Aperture. Distal exalted avicularium. Proximal lowly avicularium. Lacuna in secondary apertural spine. Distal fork of apertural bar. Proximal fork of apertural in secondary interceeial part 3] THE KELESTOMIXJE. 2ir, VI. MoBPHASMOPOKA BETDONEI Lang (fig. 10). The secondary aperture of KeJestoma is peculiar in appearance -rthat of Morphasmop
The Quarterly journal of the Geological Society of London . Fig. 9.—Diagram of the distal end of the cerium of a hypothe-tical Primitive Morphasmopora. Very much Lacuna in circum-apertural secondary tissue. Aperture. Distal exalted avicularium. Proximal lowly avicularium. Lacuna in secondary apertural spine. Distal fork of apertural bar. Proximal fork of apertural in secondary interceeial part 3] THE KELESTOMIXJE. 2ir, VI. MoBPHASMOPOKA BETDONEI Lang (fig. 10). The secondary aperture of KeJestoma is peculiar in appearance -rthat of Morphasmopora is almost grotesque; that of the Primi-tive Morphasmopora may well have had an intermediate appearance,as suggested in fig. 9. From such a condition, the extraordinaryaperture of 31. bri/clonei may have been evolved by the enormousenlargement of the proximal apertural spines which impinge against Fig. 10.—Diagram of an cerium of Morphasmopora about 133 diameters.
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Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
