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 series, Yol. 5, pi. 56, f. 24. 
Phillips, Palaeozoic 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. Spirifera 
resupinata of the same author ; Geol. of Yorkshire. Terebratula resupinata , 
Sow. Min. Conch, t. 325. Anomites resupinalus, Martin. Orthis Tulliensis, 
Report of Third District, page 163.) 
Fig. 3. Atrypa lentiformis, Vanuxeji (Geol. Report, page 165). 
Fig. 4. Atrypa affmis. (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. 51. — No. 94 and 95, pages 222 and 223. 
Figs. 1 and 2. Avicula fragilis, H. 
Fig. 3, Strophomena setigera. See fossils of the Marcellus shale. 
Fig. 4. Tentaculites fissurella. 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. 
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