CEPHALOPOD ADAPTATIONS 



PLATE 5 





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of Variously Constricted Apertures, All Natural Size 



. Mandaloceras bobemicum (Ba.rva.adc'). Silurian of Bohemia. 



.. Ophioceras simplex Barrande. Silurian of Bohemia. 



. Tetrameroceras panderi (Barrande). Silurian of Bohemia. 



. Morphoceras pseudoanceps Douville. Bajocian of France. 



. Normannites braikenridgei (Sowerby). Middle Jurassic of France. 



. Phragmoceras inflexum Hedstrom. Silurian of Gotland. 



. Arcestes intuslabiatus Mojs. Upper Triassic of Austria, 



. Hercoceras mirum Barrande. Devonian of Bohemia. 



