358 The American Geologist. December, vmi 
Fenestella subrudis n. sp. 
10. Portion of reverse face enlarged. 
11. Portion of obverse face enlarged. 
PLATE XXII. 
Fenestella conradi var. cGmpactilis n. var. 
1. Reverse face. 
2. Portion of obverse face enlarged. 
Fenestella sp. (?) 
3. Portion of reverse face, enlarged. 
4. Portion of reverse face of irregular growth. 
5- Portion of obverse face, enlarged. 
Fenestella polyporoides n. sp. 
6. Portion of reverse face enlarged. 
7. Portion of reverse face of worn specimen enlarged. 
Polypora bassleri n. sp. 
8- Outline, portion of reverse face of diffuse growth. 
9. Portion of obverse face of diffuse form enlarged. 
PLATE XXIII. 
1. Portion of obverse face, regular form of old growth. 
Polypora reversipora n. sp. 
2. Reverse face, outlined. 
3. Portion of reverse face enlarged. 
4. Transverse section of branches. 
5. Portion of reverse face enlarged. 
Polypora ulriclii n. sp. 
6. Reverse face, outlined. 
7. Portion of reverse enlarged. 
8. Portion of obverse enlarged. 
9. Profile of a branch. 
10. Transverse section of a branch. 
PLATE XXIV. 
polypora reiiiofa n. sp- 
1. Portion of obverse face enlarged. 
2. Horizontal section, enlarged. 
TJiaviniscus pinnatus n. sp. 
3. Outlined reverse face of one form of growth, natural size. 
4. Outlined reverse face, natural size. 
5. Outlined reverse face, natural size. 
6. Outlined reverse face of form most like T. octonarius. 
7. Portio.T of obverse face enlarged. 
8. Horizontal section, enlarged. 
Thamniscus palinafiis n. sp. (Provisional) 
Q. Reverse face. 
