GEOLOGY OF THE FOURTH DISTRICT. 
ORGANIC REMAINS OF THE ONONDAGA LIMESTONE. 
No. 31. — No. 61, page 157. 
Figs. 1 and 1 a. Favosites alveolaris* Williamsville, Erie county. 
Fig. 2. Favosites gothlandica. Williams'!ille. 
Fig. 2 a. — — A single tube magnified twice, and presenting a double row 
of pores upon the side. 
Fig. 2 b. A fragment from a honeycomb specimen, showing the transverse lamellas. Wil¬ 
liamsville. 
Figs. 3, 3 a, and 3 b. Fragments of crinoidal columns, showing the pentapetalous canal-and 
crenulated edges of the plates, etc. Williamsville. 
No. 32.—No. 62, page 159. 
Fig. 1. Favosites fibj'osa? Clarence, Erie county. 
Fig. 2. Astrea rugosa, H. Le Roy. 
* For synonymcs ami references of the genus Favosites, see Silurian Researches, pp. 681, 682 and 683; also Goldfuss, 
Petrefacta, Genus Calamnpora. 
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