. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. ive, gradually enlarging above; the body volution becoming ventricose, and consituting much the larger part of the bulk of the shell. Aperture ovate. The back of the volutions in the cast are marked by an obscure revolving band,but the surface markings are otherwise unknown. The specimens are casts, and consequently their reference to Pleurotomaria iswith hesitation. Geological formation and locality. I
. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. ive, gradually enlarging above; the body volution becoming ventricose, and consituting much the larger part of the bulk of the shell. Aperture ovate. The back of the volutions in the cast are marked by an obscure revolving band,but the surface markings are otherwise unknown. The specimens are casts, and consequently their reference to Pleurotomaria iswith hesitation. Geological formation and locality. In the Goniatite limestone, at Rockford,Indiana. MURCHISONIA () LIMITARIS (). Shell teretely conical : volutions five, six or more, rapidly ascending and in-ci-easing moderately in size, angular on the periphery in the cast, flattened onthe upper side and rounded below; the last one flattened on the back towardsthe aperture, which is somewhat rounded. Surface characters not fully known;the lower side of the last volution marked by strong revolving striae below thcentral revolving formation and locality. In the same strata, associated with the No. 89.] 109 LOXONEMA TURRITIFORMIS ( n. s.). Shell elongate, slender : volutions six or more, very gradually enlarging to theaperture, rounded upon the back. Aperture oval or formation and locality. In the same association as the preceding. EUOMPHALUS PLANODISCUS ( )- Shell planorbicular : spire depressed, composed of about three volutions vrhichare barely contiguous, the whole in the same plane on the upper side. Volutionsslender and very gradually enlarging from the apex, regularly rounded; the lastone near the aperture a little flattened above, and the margin of the apertureslightly expanded. This species has a more depressed spire than any other knownto me in the rocks of New-York. Geological formation and locality. In the Goniatite limestoneat Manlius, New-York. EUOMP
Size: 1458px × 1714px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
