File:The Geology of Minnesota (1897) (14584073700).jpg

Identifier: geologyofminneso97minn (find matches)
Title: The Geology of Minnesota
Year: 1897 (1890s)
Authors:
Subjects:
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

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
PLATE LIV. Page. Figs. 1 to 3 ACTINOCERAS REMOTISBPTUM Hall 782 1 Outline of a large example. 2 The form of the transverse section. 3 The first two air-chambers, longitudinally sectioned; showing the bulbs of the sipho, their thickened walls and endosiphon with its ramifying branches,xl 1-6. From the Trenton limestone at Cannon Palls, Minn. Figs. 4 and 5 Orthocebas pebroti, sp. nov 785 4 A view of a silicifled shell, showing the closely annulated exterior and the strong alternating vertical striaj. 5 Transverse section at the terminal septum. Figs. 6 and 7 Orthoceras bilinbatum Hall 786 (See also plate xlvii.) 6 View of an internal cast showing the relations of annulations and septa. 7 Another specimen illustrating the same features. From the Trenton shales at Minneapolis. ® a _® cd
Text Appearing After Image:
PLATE LV. Page.Figs, land 2 Orthoceras nicolleti, sp. nov 784 1 View of the portion of tlie conch of the original specimen; showing the strong, distant annulations and the obliquity of the septa, x 1 1-6. 2 Outline of a septum; showing the position of the sipho. From the Trenton limestone at Belle Creek, Minn. Figs. 3 and 5 Orthocekas olorus Hall 788 3 A portion of an internal cast referred to this species. 5 Outline of septum, showing position of sipho. From the Trenton limestone, Minneapolis, Minn. Figs. 4 and 6 Orthoceras tendistriatusi Hall 788 4 A portion of a conch protruding from an internal cast of a Camcroccras-sipho, and retaining the surface ornament, x 1 1-6. 6 An enlargement of the surface; showing the line concentric lines crossed bj longi- tudinal bands which appear to be traces of color-streaks. Cannon Falls, Minn. Fig. 7 ORTnocERAs sociALE Hall 789 An internal cast apparently entire at the aperture; showing the form of the shell,length of the body-chamber and the dist

Note About Images