PLATE III. 
RECEPTACULITES SUBTURBINATUS Hall. 
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Fig. 1. Lateral view of a specimen enlarged to two diameters. 
c=] 
Fig. 2. A further enlargement of the surface, showing the form of cells. 
Fig. 3. An enlarged summit view of another specimen. 
ASTYLOSPONGIA PR&ZMORSA Goldfuss. 
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Figs. 4, 5. Lateral and summit views of a specimen of medium size. 
Fig. 6. View of the upper side of a more deeply lobed specimen. 
Figs. 7, 8. Upper and lateral views of a very perfectly formed specimen, en- 
larged two diameters. 
Figs. 9, 11. Vertical sections of two specimens showing structure, enlarged to 
two diameters. The dark spots in the center are filled with pyri- 
tous matter, and are not cavities. 
Fig. 10. Horizontal section of another specimen, enlarged two diameters. 
Figs. 12, 13. Lateral and summit views of a specimen, showing some difference 
from the usual form in the lobation of the surface. 
Fig. 14. A crushed and imperfect specimen, showing the radiating fibrous-like 
character of the substance (enlarged). 
ASTYLOSPONGIA ? (PALHOMANON) BURSA 1%. sp. 
Paget 
Figs. 15, 16. Lateral and profile views of a crushed specimen, showing the 
. characters of the species. This is the only individual found 
among large collections of specimens from this locality. 
