CORRECTIONS AND INSERTIONS XIX 



Page 348, line 2 from bottom, for "rho'ml)oidea" read rhomhoideum 



" 350, insert at bottom of the page the following : Palwocyclus rotuloides, 

 described from Ruddock's quarry (3:43), which Vanuxem 

 (3:86) puts above the upper ore bed, proves to come from 

 above the lower ore. This change probably carries with it the 

 other species described from Ruddock's — Conostichus circulus, 

 Aristophycus? sp., and Lingula taniola. 

 Rafinesquina clintoni should be (lueried in this list. 



" 352, line 26 from top, Cyrtia meta is probably correctly C. hialveata 

 (Conrad) 



" 363, lines 4 and 11 from top, for ''rJiornboidea" read rhomhoideum 



" 363, line 20 from top, Lingula twniola may be lower Clinton (Wolcott) 

 after all ; see preceding. Palwocyclus rotuloides becomes lower 

 Clinton also. 



" 367, at top of page, inse^'t Cyrtia hialveata {Delthyris hialveata Con- 

 rad; Spirifera meta Hall) 



" 368, line 15 from top, add : New York State Museum. 



" 464, line 3 from bottom, for "Scale, 1 : — " read Scale, 1: 62500 



