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Fig. 
PLATE XVI. 
Cerampora labeculoidea. 
Page 33. 
,1. A frond, natural size, growing on the surface of a Fenestella. 
2. An enlargement from the surface of the above, showing the form and mode of increase of the 
cellules. 
Cerampora ? parvicella. 
Page 34. 
3. A frond incrusting a Meristella? showing mode of growth, arrangement of cell apertures, etc., 
natural size. 
Lower Helderberg group. Clarksville, N. Y. 
4. An enlargement from the preceding, showing the form and arrangement of the cellules and form 
of cell apertures. 
Cerampora maculata. 
Page 33. 
5. The base of a nearly circular form, showing the epitheca. 
6. The base of a specimen having the epitheca partially removed, showing radiating cell tubes. 
Lower Helderberg group. Clarksville, N. Y. 
7. The base of a subelliptical form preserving the epitheca and showing the remains of a Tentaculite 
on which the zoarium began its growth. 
Lower Helderberg group. Schoharie, N. Y. 
8. The base of a large individual preserving the epitheca and showing the point of attachment to 
some foreign body. 
Lower Helderberg group. Schoharie, N. Y. 
9. The celluliferous side, natural size, showing elevated maculae with larger cells. 
Lowei' Helderberg group. Schoharie, N. Y. 
10. An enlargement of the surface showing form of cell apertures. 
11. A vertical section showing mode of growth and increase of the cellules. 
(Cerampora ( Bereniceci) maxima.) 
12. A zoarium, natural size. 
Page 34. 
Paeeschara radiata. 
Page 35. 
13. A fragment, natural size, growing upon another fossil. 
Lower Helderberg group. Clarksville, N. Y. 
14. An enlargement of the surface of the above, showing- form and arrangement of the cellules. 
