587 



Pal^. 



Palaeophycus gracilis, (Lesquereux, Goal Flora of Pa., 



J 1880, page 11, plate B, figs. 9 to 

 10a. Geol. Rt. Indiana, 1875, 

 page 137, plate 1, figs. 4 to 55; 

 surface smooth ; sometimes rough 

 or dotted ; from ore balls in clay 

 over coal L, Vigo Co., Ind.) — 

 Collett's Indiana Rt. of 1883, page 

 33, plate 1, fig. 5, 6a, Possibly a 



mere variety of PalcEophycus milleri, with which it is found. 



Collett. — Coal Measures, XII L 



Palaeophycus irregularis, Hall. For -figure and descrip- 

 tion of this see page 589, 



Paloeophycus milleri. See P. gracilis. XIII. 



Palaeophycus simplex, Hall, Pal. N. Y., vol. 1, page 63, 



3Ee 



plate 22, figs la^ h. c, d; sea weeds, apparently hollow tubes^ 

 flattened and made angular by compression. Certainly there 

 can be no doubt that these are not worm burrows. The crust 

 was undoubtedly thin, soft, and flexible, for they are often bent 

 back on themselves, and are filled with fragments of shells, 

 crinoidal discs, etc. They are in fragments, sometimes six 

 inches long and a half an inch wide. Found in great numbers 

 but only in the shaly layers of the New York Trenton forma- 

 tion. — In Pennsylvania found in Centre Co , Bellefonte, Fel- 

 lows' collections, spec. 210-83 (fair specimen) from Trenton 

 limestone^ II c. 



