GEOLOGY OF THE FOURTH DISTRICT. 
ORGANIC REMAINS OF THE OLD REDSANDSTONE. 
No. 70. — No. 130, page 281. 
Fig. 1. Scale of Sauripteris Taylori, H. 
Fig. 2. Scale of Holoptychus nobilissimus, Agass. (Silurian Researches, plate 2 bis. figs. 1, 
2, 3, 4, 8 and 9). 
Fig. 3. A smaller scale of Holoptychus 1 
Fig. 4. A fragment of a tooth waterworn before being imbedded. 
No. 71.—No. 131, page 282. 
Jaw-bone and teeth of Holoptychus. 
For further illustration of the fossils of the Old red sandstone, see plate 3 of this report. 
No. 72. — Page 186. 
Cypricardia ? angustata. Report of Third District. 
ORGANIC REMAINS OF THE CONGLOMERATE. 
No. 73. — No. 139, page 291. 
Fig. 1 . Euomphalus depressus, H. (Reference E. serpens, Phil. Pal. Fossils, pi. 36, fig. 
172.) 
Figs. 2 and 3. Cypricardia rshombea, H. 
Fig. 4. Cypricardia contracta, H. 
These fossils are all from a single locality in Chautauque county, and the only place where 
I have seen fossils in the conglomerate. 
65 
