TLATE XXXIl. 



Heliophyllum (Zaphrektis) exiguum. 



Heliophijllum cxi^juum Billings. Canadian Journal, New Series, Vol. V, p. 261, figs. 8, 9. 1860. 



Figs. 1-3. Three views of a specimen of unusual form and size, as foinui in tlie Schoharie grit and 



Upper Helderberg Limestone of New York. 

 Fig. 4. An enlargement of a portion of the outer rim and side of a cup, shelving the character of 



the laraellse. 



Heliophyllum ? exiguum var. 



Fig. 5. Posterior view obliquely into the cup of the specimen. 



Fig. 6. Lateral view of the same. 



Fig. 7. An enlargement of the cup of the same specimen. Tlie great depth is not apparent in the 



figure, nor the strong denticulations of the laraellfe. Upper Helderberg Limestone of 



Western New York. 



Ajiplexus intermittens n. sp. 



Stroinhodes sp ? Hall. Geol. of N. Y. Surv. Fourth Dist. Tables of organic remains, No. 49, fig. 2, 2 a. 



F'igs. 8-13. Views of a series of specimens exhibiting the usual form and character of tlie species. 



Fig. 14. Lateral view of an elongate specimen, £|'obab]y of this species. 



Fig. 15. Longitudinal section of the preceding specimen, sliowing tlie interior to be occupied by 

 irregular and distant transverse plates, with no indication of vesicular substance. In 

 the soft shale of the Hamilton group, at Moscow and elsewhere, in Western New 

 York. 



Cystiphyllum (Chonophyllum) sulcatum. 



CystiplnjUum sulcatum Billings. Cauadiau Journal, New Series, Vol. IV, p. 1,36. 18.59. 



Fig. 10. Interior of a cup of a well preserved specimen, showing the obsolescent rays and fosset. 



Fig. 17. Profile view of the preceding specimen. 



Fig. 18. View of the anterior side of a specimen where the outer portion has been broken, expos- 

 ing the diaphragms or cups with their rudimentary rays, and showing the position 

 of the fosset. In this condition the fossil presents more nearly the characters of 

 ClionophylUnn. 



Fia:. 19. Interior of a small cup showing the rays. 



Fig. 20. Profile of the same. Upper Helderberg Limestone, near Clarence, N, Y. 



CyATHOPHYLLUM GALERUM 11. sp. 



Fig. 21. The interior of a cup of a very perfect specimen. 

 Fig. 23. The convex face of the same, .showing the line of the primary ray. 



Fig. 23. Lateral view of the same specimen, showing near the lower part one of the lateral pri- 

 mary rays. Hamilton group, Moscow, N. Y. 



