PLATE XVI. 



Cerampora labeculoidea. 



Page 33. 

 Fig. 1. A frond, natural size, growing on the surface.of a iBenestella. 



Fig. 2. An enlargement from the surface of the above, showing tljie form and mode of increase of the 

 cellules. 



Cerampora ? parvicella. '' "'>!"'''>»'> 



PageM. 

 Fig. 3. A frond incrustiiij^ a Meristellai showing mode of growth, arrangement of cell aperjtui-es, etc., 

 natural size. 



Lower Helderberg group. ClarksviUe, N. Y. 

 Fig. 4. An enlargement from the i>rcceding, showing tho form and arrangement of the cellules and form 

 of cell apertures. 



■' I .■'.;ll  , 



Cerampora MACULATA,„4<p.xiy, -uMij^i-.ni m 



Pago SI. 

 Fig. 5. The base of a nearly circular form, showing the epitheca. 

 Fig. 6. The baae of a specimen having the epitheca partially removed, showing radiating cell tubes. 



Lower HeJderborg group. Clarh»eUU, N. 7. 

 Fig. 7. The base of a subelliptical form preser^nng the epitheca and showing the remains of a Tentaculite 

 on which the zoariimi began its growth. j^. ,.,. ^ :-,, 



Lower Helderberg group. Schoharie, iV. Y. 

 Fig. 8. The base of a large individual preserving the epitheca erni}, showing the jx>int of attachment to 

 some foreign body. 



Ijower Helilerberg group. Schoharie, N. Y. . , 

 Fig. 9. The celliilifei-ous side, natural size, ■howing elevated niaculie with larger cells. 



Lower Helderberg gi-oup. Srhoharie, N. Y. 

 Fig. 10. An enlargement of the surface showing form of cell apertures. 

 Fig. 11. A vertical section showing mode of giowth and increase of the cellules. 



{Cermnpora [Berenicea) maxima.') 



Page 34. 

 Pig. 12. A zoarium, natural size. 



Paleschara radiata. 



Page 3.5. 

 Rg. 13. A fragment, natural size, growing upon another fns.'<il. 



Lower Helderberg group. ClarksviUe, N. Y. 

 Fig. 14. An enlargement of the surface of the above, showing form and arrangement of the cellules. 



