OF DENISON UNIVERSITY. 
95 
Fig. 7. 
Fig 8. 
Fig. 9. 
Fig. 10. 
Fig II. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Fig. IS- 
Fig, 16. 
Pinnatopora minor ^ n. sp.— p. 77 * 
7. A fragment of the natural size and its obverse side x 9. 
7^. A fragment showing the characters of reverse, natural size and 
X 9. Coll. E, O. U. ^ 
Streblotrypa Hertzeri, 11. sp ^ p. 85. 
8. A fragment of the natural size with a portion of the surface x 18, 
showing the arrangement of the large zooecia and mesopores. 
Coll. E. O. U. 
Streblotrypa obliqua, 11. sp. p. 85. 
A branch of this species with a portion of its surface x 18, showing the 
thick walled zooecia, their oblique apertures and the arrange- 
ment of the mesopores. Coll. Prof. C. L. H. 
Streblotrypa major^ Ulrich p. 84. 
10. A fragment of a small specimen of this species, natural size and 
a portion x 18, Coll, of E. O. U. 
Streblotrypa mtUtiporata^ n. sp p. 87. 
11. A branched fragment of the natural size and a portion of the 
surface of same x 18, showing the small zooecia apertures and 
very numerous mesopores. Coll, of Prof. C. L. H. 
Streblotrypa striata, n. sp. p. 87. 
12. The lower portion of a fragment of this species x 18, showing 
the appearance of the surface when the arrangement of the 
zooecia and ridges is regular. 
12a. The upper end of same fragment x 18, exhibiting a somewhat less 
regular arrangement of the ridges. Coll, of E. O. U. 
Streblotrypa amplexa, n. sp. p. 86. 
13. Portion of a fine ramose example of this species with a portion 
of the surface x 18 to show the arrangement and comparative 
size of the zooecia and mesopores. Coll, of E. O. U. 
Streblotrypa regularis, n. sp p. 88. 
14. Fragment of this species of the natural size and x 18, showing 
the shallow pits and other peculiarities of the species. Coll, 
of Prof. C. L. H. 
Rhombopora ohioensis, n. sp p. 90. 
15. A specimen from the ferruginous freestone layers of the Cuya- 
hoga shales showing the appearance of the surface in the young 
state X 18. 
i^a. A branched fragment of natural size and a portion of its surface 
X 18, showing the fully matured appearance of the zoarium. 
Coll, of E. O. U. 
Rhombopora incrassata, Ulrich. . p. 89. 
16. A specimen of the natural size and a portion of the surface x 18, 
showing the usual appearance in well preserved specimens of 
this species. 
