523 



Orthis. 



Orthis livia, Billings. Can. Jour, of Sci. and Art, 1860 

 VIII a_,^iik^ ^ ^^^ ^^ ^ ...^^i^fefe^^ 3?fS 



CanccrLcL , 



Geology of Canada, 1868, page 869, tigures 385 f^^, \entral: J, 

 side; c, dorsal views. Cor ?iiferous limestone, Villa. 

 Orthis lynx, {Delthysis lynx ; Platystrophia lynx ; and 



Terehratiila lynx), 

 Eichwald Nat. Skit. 

 Podol. 1830.— 

 Geology of Canada, 

 ^j^ 1863, page 167, figs. 

 ' 149 a, specimen 

 with cardinal angles rounded; 5, the more common form. 

 Trenton formation., He. — Iq Pal. Ohio, Vol. 1,1873, page 114, 

 pi. 10, fig. 1 a-e, it reads Orthis {Platystrophia) li^orcata var, 

 lynx. Von Buch. Trenton and Clinton., II (?, Y a. — Rogers' 

 Geol. Penn. 1858, page 820, fig. 616. Loraine {Hudson river) 

 formation. Ill h. Also Rogers, page 822, no figure, Clinton^ 

 V a ! — C. E. Hall reports that it probably occurs among the 

 forms in Nearhoff's quarry near Tyrone forges, Huntingdon 

 county. T, p. 59 , T 4, p. 424. Trenton. II c. 



Orthis macloedi, Whitfield. Bull. Amer. Museum Nat. 



Hist. N. Y. II, 2, 1889, 



//flr.,1 M^^^^ ^-^^^feih. page 43, plate 7, figs. 



1, 2, 3, dorsal ? and two 

 ventral valves; A, en- 

 largement of s t r i ae, 

 which are strongly 

 radiating, and distinctly alternating, the increase being chiefly 

 by implantation. Somewhat like O. evadne, Bill. (Pal. Foss. 

 I, f. 74) but has a shorter hinge line, and more striae. Found 

 in upper layers of the Ophileta led at Beckmantown. N. Y. in 

 Calciferous sandstone formation. II a. 



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