File:The Geology of Minnesota (1897) (14584062790).jpg

Identifier: geologyofminneso97minn (find matches)
Title: The Geology of Minnesota
Year: 1897 (1890s)
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Publisher: Minneapolis, Minn., Harrison and Smith
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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PLATE XLIX. Page. Fig. 1 Camerocebas, sp 777 A long cylindrical sipho, with very broad septal funnels; representing a distinctbut otherwise unknown species.From the Trenton limestone, Cannon Falls, Minn. This specimen may be advantageously compared with the figures of Orthoeerassimpsoni Billings, given by Whiteaves. (Orthoceratida3 of the Trenton lime-.stone of the Winnipeg basin; Trans. Roy. Soc. Canada, vol. ix, sect, iv, p. 80,pi. vii, figs. 2, 2a, 3; pi. viii, fig. 1, 1891). Fig. 2 CAMEROCERAS PROTEIFORME Hall 777 (See also plates Lviii, xu xii. xlii.)A portion of a large individual, showing the extent of the solid apical end of thesipho, and the abrupt increase in the depth of the air-chambers above the distalextremity of the body. Where the apical sheath is broken, at the lowerextremity of the specimen the cast of the Internal cavity and the thickness ofthe sipho are exposed. Cannon Falls, Minn.
Text Appearing After Image:
PLATE L. Page.Figs, land 2 Cameroceeas PROTErroEME Hall 777 (See also plates Lvin, lix, lxi, lxii.) 1 Cross-sectioQ of the continuous apical sheath (E) in the filling (e) of which are three small orthoceran shells (x). Trenton limestone, Cannon Falls, Minn. 2 Fragment of a large internal cast with the filling of the air-chambers embracing the cast of the continuous apical sheath. Cannon Falls, Minn. Fig. 3 Cameroceeas, sp 777 Cast of a slender Colpoceras-Vike sipho, with broad septal funnels and a narrowacuminate extremity which may indicate the filling of the endosiphon. Fromthe Trenton limestone, probably at Cannon Falls, Minn. Vol. III. (®ephai:registered🅿️registered:da,j Plate L. ■^rtj^fe

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