PLATE XCYII. 



CtRTOCBRAS JBMlTLVli. 



Pa^ 871. 



See Plate 98. 



Fig. 1. Lateral view of a compressed fragment, phowinjf the curvature of the tube and the irregular annula- 

 tions of the internal mould, coiTCsponding to the eiteraal ornaments of the test. Schoharie 

 grit. Scholtarie, iV. F. 



Fig. 2. A larger portion of an individual, showing the irregularity of the annulations on the internal mould 

 an<i the curvature of the outer portion of the tube. Schoharie grit. Schoharie, N. T. 



Pig. S. The apical portion of an individual, showing the curvature of the tub« toward the apex, and the 

 extension of the lamellose expansions of the test into the surrounding i-ock. Schoharie grit. 

 Clarksville, N. T. 



Fig. 4. A small septate fragment, showing the depth of the air-chambers and the concavity of the septa. 

 Schoharie grit. Schoharie, N. Y. 



Fig. 5. A septum of the preceding, showing the amount and dii-eclion of comoression to which the tube has 

 been subjected, and the position of the siphuncle. 



Fig. 6. An impei-fect fragment, showing tlie curvature of the tube and the depth of the air-chambei'S. 

 Schoharie grit. Schoharie, N. T. 



Fig. 7. A septum of the preceding, showing the transverse section of the tube. 



Fig. 8. Lateral view of a chambered fragment, showing the relations of the suture-lines and the annular 

 tions of the internal mould, and the regularity of the air-chambei-s. Schoharie giit. Scho- 

 harie. N. T. 



Fig. 9. A septum of the preceding, showing compression in a direction oblique to the ventro-dorsal axis. 



The specimens figs. 4, 6 and 8 are i-eferred to this species, as agreeing in the amount of 

 curvatui-e, apical angle, and the depth of the air-chambere, but possessing few other distinc- 

 tive features. 



CyKTOCERAS EUaBNIUM. 



Page 369. 



See Plates 36, 47, 96. 



Fig. 10. A fragment retaining a portion of the chamber of habitation and several attached air-chambers, 



Schoharie grit. Schoharie, N. T. 

 Fig. 11. A septum of the preceding, showing the transverse section and the position of the siphuncle. 



