/'LATE VI 



_ PAGE. 



Fig. 1. Leioclema punctata, Hall's sp. ? —Tangential section enlarged to 



34 diameters, . 141 



An equally enlarged longitudinal section of the same specimen, which 

 was identified by Dr. Rominger with the Cullopora punctata. Hull. 

 Not having been able to examine authentic examples of Hall's 

 species, I can not verify this identification. 



Fig. 2. ERIDOPORA MACROSTOMA, n. sp. — Surface of this species magnified to 



18 diameters, 137 



2a. Longitudinal section enlarged to 18 diameters. 

 Fig. 3. Eridopora punctifera, n. sp.— Longitudinal section magnified 18 



diameters, 138 



Fig 4. Berenicea primittva, n. sp. — Surface of this species magnified 18 



diameters, 157 



Fig. 5.— Berenicea vesiculosa, n. sp.— Surface enlarged to 18 diameters, . 158 

 Fig. 6. Scenellopora radiata, n. sp. — Profile view of the type specimen, 



natural size, , .... 158 



6a. View of the celluliferous surface of same. 



66. A portion of the celluliferous surface magnified to 8 diameters. 



Fig. 7. Mitoclema CINCTOSA, n. sp.— A fragment of this species, natural size, 159 



7a. Portion of a branch magnified to 18 diameters. 



Fig. 8. Arthronema TENUE, James' sp. — Portion of a large zoarium, show- 

 ing the method of growth ; natural size, 160 



8a. The celluliferous side of the upper end of a segment, enlarged to 34 

 diameters. 



86. The striated side of the lower end of a segment, magnified to 34 diameters. 



8c. A transverse section of a segment, equally enlarged. 



Fig. 9. Arthronema curtum, n. sp. — The striated side of a segment, en- 

 larged to 18 diameters. 161 



Fig. 10. Arthroclema spiniforme, n. sp. — The lower end of a segment, en- 

 larged 18 diameters, 161 



10a. A transverse section of a segment, similarly enlarged. 



106. An equally.enlarged longitudinal section. 



Fig. 11. Heteropora consimilis, n. sp. — Surface of this species enlarged to 



18 diameters, 143 



Fig. 12. Heteropora attenuata, n. sp. — Longitudinal section enlarged to 



18 diameters. . . . . , 144 



Fig. 13. Fenestella oxfordensis, n. sp. — Two of the branches enlarged to 



18 diameters, 159 



Fig. 14. Phyllopora variolata, n. sp. — Portion of the celluliferous side 

 enlarged to 8 diameters, showing the variable character of the 



fenestrules 160 



Fig. 15. Dicranopora trentonensis, n. sp. — A segment of this species, nat- 

 ural size, ^167 



15a. Surface enlarged to 18 diameters. 

 Fig. 16. Dicranopora lata, n. sp. — A segment of this species, . . . 166 

 16a. The surface enlarged to 18 diameters. 



In the description of this species no mention is made of the 

 interstitial furrows, shown in Fig. 16a, they being worn off in the 

 specimens then at hand. 



Fig. 17. Ptilodictya MACULATA, n. sp. — A longitudinal section showing the 



connecting foramina, .... - 163 



Fig. 18. Callopora (?) cincinnatiensis, Ulrich. — Surface enlarged to 34 di- 

 ameters, .... ........ 142 



18a. Tangential section magnified 34 diameters. 



