565 



Orthod. 



Orthodesmaparallelum. {Orthonota parallela. Hall, Pal. 



m-c 



221 ■ 



Em 



N.Y.Vol. 



1, 1847, 

 Hudson 



group ) Emmons, Am. Geol. I ii, 

 1855, 173, plate 13, fig. 14 ; with an 

 obscure keel ; fine concentric striae, 

 and a few strong wrinkles along the 



back ridge. I add from Geol. Canada, 1863, page 216, fig. 224. 



— Hudson River {Lot aine) for mation, Illh. 



Orthodesma rectum, H. & W. Pal. Ohio, Vol. 2, 1875, 



page 95, plate 2, fig. 7, right side of a small specimen ; fig. 8, 

 a larger individual, characteristic ; found, with other species of 

 Orthodesma^ at Waynesville, 0., in upper soft Hudson River 

 shales. Not readily mistaken except perhaps for 0, curvatum. 

 which however has a contracted base line, and is broader 

 behind. Is somewhat like 0, ( Orthonota) parallelum of the 

 N. Y. Had. Riv. formation, which however has a rounded hind 

 end, etc. — /// h. 



Orthogoniopteris clara, Andrews. Pal. Ohio, Vol. 2, page 

 419, plate 50, fig. 1, nat. size of the plant ; but the fig. does not 

 show the rounding of the base of the upper side of the leaves, 

 which feature is dimly seen in the specimen ; 1 «, emlarged 

 nervation. Coal measures. XIII f — For the Hgure of this 

 plant see page 56 Jf. 



Orthogoniopteris gilberti, Andrews. Pal. Ohio, Vol. 2, 

 1875, page 420, plate 50, fig. 2, naturalsize^ a plant species 

 of the bottom strata of the coal measures., which shows the 

 upper basal margin of the leaves. — XII^XIII — For the -figure 

 of this plant see page 566, 



