730 APPENDIX L 
Nos, 2, 3, 4, 5, 6, 7, 8, 9, are leaves of one or more species of Tazodium. 
No. 10 appears to be a leaf of a Smlaz. 
Nos. 11, 12, 13, 14, 15, of uncertain species. 11 and 12 are opposite sides, probably, 
of similar leaves; and 13, 14, 15, are like No. 11. 
The same specimen contains, at a, a round piece of fossil resin, probably from some 
of the coniferous plants whose leaves are here imbedded. 
Fig. 11, plate 21, represents a very thin calcareous leaf-like expansion, occurring in 
the argillaceous shale near Astoria. It is too imperfect to be fully characterized. The 
specimen is apparently one of the calcareous Algee. ‘The frond is very thin, and deeply 
lobed ; the lobes longitudinally undulate ; the surface very smooth, and without mark- 
ings of any kind. | It is extremely tender, and-its thickness does not exceed that of 
common writing paper. ; 
