. Bulletin - New York State Museum. Science. BEEKMANTOWN AND CHAZY FORMATIONS OF CHAMPLAIN BASIN 467 dorsoventral diameter has become equal to the other one and the conch is subcircular in section. The sutures pass nearly straight transversely in both the nepionic and neanic stages, the lateral lobes being still undeveloped, and the ventral saddle very shallow. They begin, however, in the neanic stage to turn markedly forward near the line of involution, indicating the presence of a high dorsal Fig. 26 Tarphyceras seelyi Whitf. (sp ) SLCtiop. showing- the living chamber. Natural size
. Bulletin - New York State Museum. Science. BEEKMANTOWN AND CHAZY FORMATIONS OF CHAMPLAIN BASIN 467 dorsoventral diameter has become equal to the other one and the conch is subcircular in section. The sutures pass nearly straight transversely in both the nepionic and neanic stages, the lateral lobes being still undeveloped, and the ventral saddle very shallow. They begin, however, in the neanic stage to turn markedly forward near the line of involution, indicating the presence of a high dorsal Fig. 26 Tarphyceras seelyi Whitf. (sp ) SLCtiop. showing- the living chamber. Natural size This forward curvature of the dorsal sutures is in "our specimens developed much stronger than either Whitfield's drawings or de- scription would indicate for the type specimen. The latter, however, showed on inspection the same 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
