TKopinoLKPTUs Fauna at Canandaigua Lake, N. Y. 167 



S. pe7'plana Conrad. 



Pal. N. Y., Vol. IV., 1867, pp. 92, 98, pi. II, fig. 22, 1)1, 12, 



figs- 13-15- 



While not so abundant as S. incequistriata, this is a common species 

 at the Canandaigua Lake locality. The specimens are all smaller than 

 the average, the largest being 21 x 24 mm. The species occurs from 

 Thedford to Otsego Co., but is rare at both limits and most common 

 at the meridian of Cayuga Lake. 



Pholidostrophia iowaensis Owen. 



Pal. N. Y., Vol. IV., 1S67, p. 104, pi. 18, fig. I. 



In certain zones of all the sections from Thedford to Cayuga Lake, 

 this species is common, as it is in the present faunule. Our speci- 

 mens are of about the usual size. 



Ortlwthetes chemuugensis Conrad, var. pcctcnacea Hall. 

 Pal. N. Y., Vol. IV., 1S67, p. 64, pi. 10, fig. 6. 



This variety, which Schuchert has considered as a synonym for the 

 true species chemtingensis Conrad, is quite common in the present 

 collection, but the specimens are rather small as compared with Hall's 

 figures. This type was found by Cleland in zone A of the Cayuga 

 Lake section. 



O. themiingensis var. arctisiriatiis Hall. 

 Pal. N. Y., Vol. IV., 1867, p. 71, pi. 9. 



This variety is also common in the material, and most of the speci- 

 mens are rather small. The largest is 16 mm. long and 22 mm. in 

 width. This variety occurs in both the upper and lower Hamilton in 

 the Thedford, Eighteen Mile Creek and Cayuga Lake sections, but 

 only above the Encrinal at Livonia. 



O. belhilus Clarke. 



13 Ann. Rept. N. Y., State Geol. 1895, pp. 176, 187, pi. 4, 

 figs. 2-4. 



This species was described from the Marcellus of the Livonia section 

 and has been reported from the Marcellus at Stony Point on Lake 

 Erie, where it occurs only a few inches above the Onondaga. It has 

 not been found in the Hamilton previous to the present instance. 

 The largest specimens in this collection are about 10 x 14.5 mm. and 

 have 24 to 30 striae. 



Clionetes coronatus Conrad. 



Pal. N. Y., Vol. IV., 1867, p. 133, pi. 21, figs. 9-12. 



