GEOLOGY OF THE FOURTH DISTRICT. 



ORGANIC REMAINS OF THE ONONDAGA LIMESTONE. 



No. 31. — No. 61, page 157. 



Figs. 1 and I a. Favosites alveolaris.* Williamsville, Erie county. 



Fig. 2. Favosites gothlandica. Williams\illc. 



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 lamelloe. Wil- 

 liamsville. 



Figs. 3, 3 a, and 3 b. Fragments of crinoidal columns, showing the pcntapetalous canal-and 

 crenulated edges of the plates, etc. Williamsville. 



No. 32. — No. G2, page 159. 

 Fig. 1. Favosites fibrosa? Clarence, Erie county. 

 Fig. 2. Aslrea rugosa, H. Le Roy. 



♦ For synonymes anil references of the genus Favosites, see Silurian Researches, pp. 681, 682 and 683 ■ also Goldfuss 



Petrefacta, Genus Calamnpora. ' 



27 



