Tropidoi.eptus Fauna at Cananpatoua I.ake, N. V. 171 



Pterineopecten reij;it/an's Hall. 



Pal. N. Y., Vol. V, pt. I, p. 70. 



There are only a few fragments re[)resenting this species, but they 

 show the usual surface markings. 



Pterineopecten conspectus Hall. 



Pal. N. Y., Vol. V, pt. 1, p. 66, pi. 17. 



The specimens representing this species are very small. The largest 

 is 8 X 10 mm. and the others are much smaller. The species is rare 

 at Eighteen Mile CTeek and Cayuga Lake as well as at the present 

 locality. It is not reported from the other localities. 



Lyriopecten oi-biculatiis Hall. 



Pal. N. Y., Vol. V, pt. I, p. 42, pis. 4, 82. 



A valve resembling the figures of this species was found. The 

 species is fairly common in the upper Hamilton at Livonia. 



Modioniorpha a I at a Conrad. 



Pal. N. Y., Vol. V, pt. I, p. 27S, pis. 37, 80. 



This species is very rare here as in the other sections where it is re- 

 ported, namely ; the Eighteen Mile Creek and Cayuga Lake sections. 



Cyp>-icardella be Hi striata Conrad. 



Pal. N. Y., Vol. V, pt. i, p. 485, pis. 79, 96. 



The casts of this species are fairly common, though the shells are 

 rarely preserved. The species attains its usual size. 



It is found in all the sections from Eighteen Mile Creek to Albany 

 county but is most common at Cayuga Lake. 



Cypricardinia indenta Conrad. 



Pal. N. v., Vol. V, pt. I, p. 485, pis. 79, 96. 



This species is represented by some fragments which show the usual 

 surface, but indicate individuals of small size. They are rare. The 

 species is common at Eighteen Mile Creek and Cayuga Lake and rare 

 at Livonia and in Otsego county. 



Nyassa arguta Hall. 



Pal. N. Y., Vol. V, pi. 53, figs. 9-20. 



Two casts appear to belong to this species. If so this is the farthest 

 west this fossil has been found. It is common in Otsego and All)any 

 counties. 



Gastropoda. 



Pleurotoinaria capil/aria, Conrad. 



Pal. N. v., Vol. V, pt. 2, p. 77, pi. 20. 



