PLATE XLV. 



GOMPHOOERAS OVIFORME. 



Pa«e SU. 



See Plates 46, 94. 



Fig. 1. A view of the aperture of a^ specimen showing- the comparative size and relations of the \a.vge ami 

 small apertures. Goniatite limestone of the Marcellus shale, near Maidius, N. Y. 



Fijf. 2. Dorsal view of a specimen, Bbowing- the general form of the shell and the truncated apex. The api- 

 cal portion is not fully represented, the specimen pi-eservinf^ considerable more of the test cover- 

 ing the apex than is represented in the figure. A fragment of the test is preserved on the 

 chamber of habitation, showing the line, lamellose lines of growth. Goniatite limestone. Sclio- 

 harie, N. Y. 



Pig. 3. The aperture of the preceding specimen, which is somewhat larger in proportion to the diameter of 

 the tube than in the specimen shown in fig. 1. 



Fig. 4. A view of the aperture of another individual, which exhibits a considerable variation from the pre- 

 ce<ling specimens in the position of the apertui-e and the non-symmetrical ai-rangement of the 

 large and small apertures. Goniatite limestone. Scftoharie, N, Y. 



GOMPHOCERAS FiSCHERI. 



Page 336. 



Fig. 5. Lateral view of an individual, showing its fusiform shape and the crenulated zone at the base of the 

 chamber of habitation, with the furrows continued over the walls of the air-chambers. A frag- 

 ment of the test, showing the surface-markings, is preseived over a small portion of the air- 

 chambers. The apical portion is partially restored, and represents a much smaller apical angle 

 than is indicated in the other specimens of the species. Goniatite limestone, near Manlins, N. Y 



Fig. 6. Represents a fragment of another specimen from the same locality, preserving the shell over the 

 eutire surface of the tube, and showing the broad sinus of the striae over the ventral side. 



