PLATE LXIX. 



• . Gk)NIATITE8 8IMC;,AT0R." 



FHgu 46S. 

 See Plate 74. 

 Kg. 1. Lateral view of a specimen showing' a considerable part of the grand .chamber, with the remaining 



portion distinctly marked by the septal lines. Chemung group. Near Tt/taca, N. Y. 

 Fig. S. Profile of the same, showing the coui-se of the septa and minute ventral lobe. The specimen is 

 somewhat imj)eifect, and the outline of the piierture on the right side of the figure has lisen 

 restoi-e<l to correspond with the preserved portion on the left side. The basal margins of the 

 aperMre are moi-e angular tiiau represeutetl. 



GONIATITES VaNUXEMI. 



Pa£0 434. 



See Plates 66, 67, 68, 109. 



Rg. 3. Lateral view of a young specimen which is septate throughout (the outer chamber wanting), and the 



volutions vei-y i-otund. 

 Fig. 4. The pei-iphoral aide of the game individual, showing the ventral lobe and the double revolving 



furrows, which mark this stage nf growth. 

 Fig. B. Lateral view of a larger specimen, showing the i-evolving grooves and transveree undulations, both 



of which usually become obsolete in the more advanced stages of gi'owth. 

 Fig. 6. Lateral view of a larger individual, showing the gradual obsolescence of the external features which 

 mark the younger stages of growth. The specimens of this species, here illustrated, are from 

 the Gouiatite limestone of the Marcellus shales. Near Manlius, N. T. 



GfONIATITES MiTHRAX. 



Pagc4S». 



See Plate 74. 



Pi|f. 7. Lateral view of the specimen originally described, showing the form and disposition of the septa. 



Upper H«lderberg limestone. Near Culumbus, Ohio. 



QONIATITES PERACOTUS. 

 Page 4«3. 

 See Plate 74; 

 Pig. 8. Lateral view of a fragment preserving the base of the grand chamber and sevei-al adjacent air- 

 chambers. From the base of the Chemung group. Near Jthaea, !f. Y. 



GONIATITES ChEMUNQENSIS. 



Page «7. 



See Plate 74. 



Fig. 9. View of the original of Mr. Vanuxbm's figure. The specimen shows pai-ts of several of the inner 



volutions and the impression of others, with a jiortion of the principal one. Chemung gp-onp. 



Near Ovxgo, N. Y. 



GONIATITKS CnEMCNGENSIS, Var. EQDICOSTAT08. 

 Page 469. 

 Fig. 10. Lateral view of a specimen which is very imperfectly preserved, but showing the annulations o' 

 the tube. 



