PLATE XXXI. 



CyATHOPHYLLUM CONATUJI 11. sp. 



Fig. 1. The exterior of a specimen, showing unusually regular growth. 



Fig. 2. Longitudinal section of the same specimen, showing narrow, much crowded and wrinkled 

 transverse diaphragms. 



Figs. 3, 4. Views of the opposite sides of a specimen, showing great irregularity of growth. 



Fig. 5. View of .a specimen, intermediate in character between the two preceding. 



Fig. 6. A small straight specimen of regular growth, with cah'.x much contracted. This ma}' per- 

 haps prove a distinct species. 



Fig. 7. Lateral view of an imperfect specimen, similar to figures 3 and 4. 



Fig. 8. Oblique view of the same specimen, showing the margin of the parent cup, above which 

 the coral is greatly contracted. 



Fig. 9. A longitudinal section of a specimen, similar to figures 3 and 7, .«howing very broad trans- 

 verse diaphragms, which are in some parts closely crowded. 



Fig. 10. A lateral view of an extremely elongate specimen of very n-regular growth. 



Figs. 11, 12. Lateral and summit views of a young specimen. 



Fig. 13. Enlargement o' the interior of the cup of figure G. Hamilton group, from various locali- 

 ties in Western New York. 



Fig. 14. View of the calyx of CyathophyUuvi nanitm, plate xxii, figs. 12 and 13. This figure 

 was omitted by mistake from Plate xxii. 



CyATHOPHYLLUM GKADATUM 11. sp. 



Figs. 15, 16. Lateral and summit views of a specimen. The opposite side of the specimen is more 

 decorticated, and pr^seuts the .aspect of Clyjuophyllum, but differs essentiallv from 

 (;very specimen of C. conatnm. 



CyATHOPHYLLUM PALUM 11. Sp. 

 Figs. 17, 18. Views of the opposite sides of the same specimen. 



