. Bulletin - New York State Museum. Science. Fiff. 53 Fig. 54 Fig. 55 Fig. 51 Ooceras (?) perkinsi sp. nov. Longitudinal section of the type. Natural size Fig. 54 Ooceras (?) perkinsi sp. nov. Transverse section of the type, x -f^ Fig. 55 Ooceras (?) perkinsi sp. nov. Enlargement (x ) of siphuncle to show the endosiphotube and sections of vertical lamellae From, Loxoceras moniliforme it can be distin- guished by its curvature and the relatively smaller size of the siphuncle. L. c ham plainen s e has considerably shallower chambers. Family oncoce;: Genus cyclostomiceras Hyatt ^ This

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. Bulletin - New York State Museum. Science. Fiff. 53 Fig. 54 Fig. 55 Fig. 51 Ooceras (?) perkinsi sp. nov. Longitudinal section of the type. Natural size Fig. 54 Ooceras (?) perkinsi sp. nov. Transverse section of the type, x -f^ Fig. 55 Ooceras (?) perkinsi sp. nov. Enlargement (x ) of siphuncle to show the endosiphotube and sections of vertical lamellae From, Loxoceras moniliforme it can be distin- guished by its curvature and the relatively smaller size of the siphuncle. L. c ham plainen s e has considerably shallower chambers. Family oncoce;: Genus cyclostomiceras Hyatt ^ This new genus is proposed in Zittel-Eastman's textbook and based upon the species described next as genotype. Its diagnosis is: Slender, short, exogastric orthoceracones and cyrtoceracones, cir-. 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 New York State Museum; New York State Museum. Albany : New York State Education Dept

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887