PLATE XIV. 
Diplotrypa walkeri n. sp. (Page 47.) 
[See also PI. XXV, fig. 4.] 
Fig. 1. Tangential section, X 20. showing the usual number of mesopores and the differ 
ences in the size of the zooecia. 
2, 3. Vertical sections, X 20, exhibiting slight variations in the tabulation of mesopore 
and zooecia. 
4. Portion of fig. 1 , X 40. 
5. Surface view of one of the types, X 8. 
Rochester shale, Grimsby, Ontario. 
Stigmatella globata n. sp. (Page 28.) 
6. Tangential section, X 20, passing through one of the zones of acanthopores an< 
illustrating the thin walls and comparatively few acanthopores and mesopores 
7. A portion of fig. 6, X 40, exhibiting the structure and size of the acanthopores am 
the characteristic amalgamation of the zooecia! walls. 
8. Vertical section, X 20, cutting two zones of acanthopores. 
9. Surface view of the sectioned type, X 8. 
Rochester shale, Lockport, N. Y. 
Nicholsonella florida (Hall). (Page 38.) 
|See also Pi. XXIV, figs, l, 2.J 
10. Tangential section, X 20, illustrating the large acanthopores indenting the zooecia 
apertures. 
1 1. Vertical section through a small portion of an immature region and all of a matun 
region, X 20. 
Rochester shale, Lockport, N. Y. 
Nicholsonella ringuebergi n. sp. (Page 39.) 
12. Tangential section, X 20, through the mature region. The zooecial cavities ar 
blackened in order to bring out more clearly the indentation of the walls!) 
the acanthopores. 
13. Vertical section, X 20, passing through an entire zoarium. 
Rochester shale, Lockport, N. Y. 
92 
