I'koi'iDoi.KPTrs Fauna at Canaxdaigua Lake, N. Y. 161 



Streblotrypa lianiiltonciisis Nich. 



Pal. X. Y., Vol. YI, ]). 191, pi. LV. 

 This is a common fossil at Thedford above the Encrinal. It occurs 

 rarely in the lower part of the Eighteen Mile Creek section and is very 

 rare at our locality. It has not been reported further east. 

 Ptilodictya pliiinca Hall. 



Pal. N. Y., Yol. VI, p. 271, pi. LXI. 

 Several very complete colonies of this species were found in the 

 collection. It occurs also in the Deijiissa bed at Eighteen Mile Creek. 

 Cystodicta iucisurata Hall. 



Pal. N. Y., Vol. VI, p. 241, pi. LX. 

 This is one of the most common species in our faunule. It is also 

 very common in the Stictopora beds at Eighteen Mile Creek and 

 Cayuga Lake and in the upper Hamilton at Livonia. 

 It occurs in the eastern counties only at East Berne, 

 Tceniopo7-a exigua Nich. 



Geol. Mag. Lon., N. S., Yol. I, p. 120. 

 This is also a common fossil at Canandaigua Lake and is quite com- 

 mon in all sections from Eighteen Mile Creek to Albany Co. 



A crogenia pro life ra Hall. 



Pal. N. Y., Yol. YI, p. 267, pi. LXIII. 



This peculiar bryozoan is fairly common in our faunule. It is not 

 reported from the other sections. 



Lithenalia stellata Hall. 



Pal. X. Y., Yol. VI, p. 195, pi. LYIII. 



This species is rare in the Deuiissa bed at Eighteen ]\Iile Creek and 

 common in the Hamilton above the Encrinal limestone at Divonia 

 and Canandaigua Lake. 



ralescliara reticulata Hall. 



Third Ann. Rept. N. Y. vState Geol., p. 6. 



This species occurs rarely in both the Deuiissa bed at Eighteen 

 Mile Creek and in the faunule at Canandaigua Lake. 



Brachiopoda. 



Lin gala sp. 



A few fragments of Lingulas which could not be identified on 

 account of their condition, were found in breaking up pieces of the 

 rock. The Li/nri/la shells were not silicified. 



