. Bulletins of American paleontology. 46 Bulletin 150 192. Fig. 7. Ectosiphuncle of Diastoloccras perplexum. weakly inflated. The connecting rings are poorly preserved, but it seems probable that they were considerably thickened. Occurrence.—Locality NL 20 E, Emanuel limestone, Emanuel Creek, Kimberley Division, Western Australia. Family BALTOCERATIDAE Kobayashi, 1937 Genus HEMICHOANELLA Teichert and Glenister, Type species.—Hemichoanella canningi Teichert and Glenister, Description.—Orthoconic longicones with smooth shell, circular cross-section, and large marginal siphuncle; sut
. Bulletins of American paleontology. 46 Bulletin 150 192. Fig. 7. Ectosiphuncle of Diastoloccras perplexum. weakly inflated. The connecting rings are poorly preserved, but it seems probable that they were considerably thickened. Occurrence.—Locality NL 20 E, Emanuel limestone, Emanuel Creek, Kimberley Division, Western Australia. Family BALTOCERATIDAE Kobayashi, 1937 Genus HEMICHOANELLA Teichert and Glenister, Type species.—Hemichoanella canningi Teichert and Glenister, Description.—Orthoconic longicones with smooth shell, circular cross-section, and large marginal siphuncle; suture has deep narrow ventral lobe; camerae high; septal necks hemichoanitic, connecting rings thick and uniform in composition. The generic name refers to the hemichoanitic structure of the septal necks. Ajfinities.—Hemichoanella has affinities with both the Baltocer- atidae and the Proterocameroceratidae. Under the system of classi- fication accepted at present (Flower and Kummel, 1950), the genus. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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