GEOLOGY OF THE FOURTH DISTRICT. 



ORGANIC REMAINS OF THE TULLY LIMESTONE. 



No. 50. — No. 92, page 215, 



Fig. 1. Atrypa cuboides ? (Reference, Sowerby, Geol. Trans. 2d scries, Vol. 5, pi. 50, f. 24. 

 Phillips, Paleozoic fossils, page 84, pi. 34, f. 150. Pages 215 and 216 of 

 Report.) 



Fig. 2. Orthis resupinata. (Phillips, Palaeozoic fossils, p. 67, pi. 27, f. 115. Spirifcra 

 resupinata of the same author; Geol. of Yorkshire. Tercbratula resupinata, 

 Sow. Min. Conch, t. 325. Anomitcs rcsupinatus, Martin. Orthis Tullicnsis, 

 Report of Third District, page 163.) 



Fig. 3. Atrypa lenliformis, Vanuxem (Geol. Report, page 165). 



Fig. 4. Atrypa aflinis. (For synonymes and references, see page 198 of this report.) This 

 fossil is partially a cast, with the shell remaining on the edges which are com- 

 pressed. 



Fig. 5. Atrypa cuboides ? 



ORGANIC REMAINS OF THE GENESEE SLATE. 



No, 5i. _ TS' . J)4 and 95, pages 222 and 223. 



Figs. 1 and 2. Avicula fragilis, H. 



Fig. 3. Strophomena setigera. Sec fossils of the Marcellus shale. 



Fig. 4. Tentaculites fissurclla. See fossils of the Marcellus shale. 



Fig. 5. Lingula spatulata. 



Fig. 6. Lingula concentrica. 



Fig. 7. Atrypa quadricostata. 



Fig. 8. Orbicula lodensis. The four last figures are from the Report of the Third District. 



45 



