. Bulletin - New York State Museum. Science. :r NAUTILOIDEA Genus orthoceras Breyn [Ety.: o/z^/ov?, straight; -/Jpa^:, horn] \ \ f i'^73^- Dissertatio physica de polythalamiis) Fig. 146 oi^ti^ras Shell a straight conic tube, with a large body muitiseptum chamber and numerous air chambers, separated by convex septa. Sutures simple, at right angles to the long axis of the shell; siphuncle central, sub- central, or eccentric, cylindric or sometimes w^idening in the chambers. Surface smooth or variously ornamented by transverse or longitud- inal striae, or by annulations. Orthoceras muitiseptum Ha
. Bulletin - New York State Museum. Science. :r NAUTILOIDEA Genus orthoceras Breyn [Ety.: o/z^/ov?, straight; -/Jpa^:, horn] \ \ f i'^73^- Dissertatio physica de polythalamiis) Fig. 146 oi^ti^ras Shell a straight conic tube, with a large body muitiseptum chamber and numerous air chambers, separated by convex septa. Sutures simple, at right angles to the long axis of the shell; siphuncle central, sub- central, or eccentric, cylindric or sometimes w^idening in the chambers. Surface smooth or variously ornamented by transverse or longitud- inal striae, or by annulations. Orthoceras muitiseptum Hall (Fig. 146) (1852. Pal N. Y. 2:14, pi. 4 (bis)) Distinguishing characters. Cylindric, gradually tapering; septa distant one sixth to one seventh the diameter. Found in the upper Medina sandstone at Lock- port, etc. (Hall). Probably also at Niagara. Orthoceras annulatum Sowerby (Fig. 147). Orthoceras undu latum Hall (1852. Pal N. Y. 2:293, pi. 64, 65) Distinguishing characters. Strong annulations; moderately strong longitudinal lines which node ^S^^J ^'enSfpor- , ,. r , 2_ • ; tiou showing shell of liv- the annulations, ime transverse striae; elliptic ing chamber and section- ed camerae (after Bar- cross-section; subcentral siphuncle. rande) Found in the Clinton limestone lenses in the Rome, Watertown and Ogdensburg railroad cut above Lewiston. Also in the Roches-. 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
Size: 872px × 2864px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
