34 PALEONTOLOGY OF NEW YORK. 



and more oblique than the others, and the upper portions of the cell-walls 

 are exposed for nearly their entire length. The largest specimen observed 

 has a diameter of about 10 mm. 



This species dififers from C. maculata (pi. xvi, figs. 5-11) in being much 

 thinner ; the cells smaller, more oblique and more decidedly alternating and 

 imbricating. 



Formation and locality. Lower Helderberg group, near Clarksville, N. Y. 



CerAMOPORA ? PARVICELLA. 



PLATE XVI, FIGS. 8, 4. 



Ceramopora parvieella. Hall. Thirty-second Rept. N. Y. State Mus. Nat. Hist., p. 1.58. 1879. 

 " " " Report of State Geologist for 1882. Expl. pi. 16, &gs. 3, 4. 1888. 



ZoARiDM consisting of a foliate expansion encrusting other bodies. Cells short, 

 tubular, rapidly enlarging in size. Apertures very oblique or rectangular to 

 the surface ; diameter .30 mm., alternating and imbricating. At irregular 

 distances upon the surface there are maculae, where the cells are larger and 

 more decidedly oblique than on other parts. 



Formation and locality. Lower Helderberg group, near Clarksville, N. Y. 

 {Ceramopora (Berenicea) maxima.) 



PLATE XVI, FIG. 18. 



Cerwmopnra {Berenicea) maxima. Hall. Twenty-sixth Rept. N. Y. State Mus. Nat. Hist., p. 109. 1874. 



" Thirty-second Rept. N Y. State Mus. Nat. Hist., p. 1.59. 1879. 



" " " Report of State Geologist for 1882. Expl. pi. 16, fig. 12. 1883. 



A FINAL examination of the specimen originally described, and another one 

 of similar character, still leaves the true nature and relations of the fossil 

 in doubt. Until something more satisfactory shall be learned regarding the 

 structure of the specimens, I prefer to drop the name from the list of deter- 

 mined species. 



Formation and locality. In the shaly limestone of the Lower Helderberg 

 group, at Schoharie, N. Y. 



