171 



in the center; triangular spinules at angles of cell rims. 

 sometimes on sides. 



Found in the Demissa and Sfcictopora beds, at Section 5. 



Paleschara reticulata. Hall. (Fig. 66.) (3d Ann. 

 Rep't N. Y. State Geo!., p. 6. ) 



Distinguishing Characters. — Thin 

 incrustation ; pentagonal, hexago- 

 nal, or quadrangular cells, .35 mm. 

 in diameter, in contact, and vari- 

 ously disposed ; general appearance 



„£ r„ „tv x* l x x Fig. 66. Paleschara reticulata. 



OI Surface Often retlClllate; llimute A frond encrusting a coral; natural 



....i n x-i a i* size, and a portion of the surface 



interstitial Cells ; mOlltlCUleS 4 OI* O enlarged, showing the monticules. 



From the Demissa bed. (Original.) 



mm. distant; central space with 



cells .45 or .50 mm. in diameter; marginal spinules in well- 

 preserved specimens. 



Found in the Demissa bed, at Section 5. 



Paleschara amplectens. Hall. (Not figured.) (3d Ann. 

 Rep't N. Y. State Geol., p. 7. ) 



Distinguishing Characters. — Extremely thin incrustation, 

 commonly on crinoid stems; quadrangular to hexagonal 

 cells, 2 mm. in diameter; minute marginal nodes or spin- 

 ules ; no monticules or maculae, but cells all of same size. 



Found in the Demissa bed, at Section 5 (rare). 



Genus LICHENALIA. Hall. 



[Ety. : From resemblance to a lichen.] 

 (1852: Pal. N. Y., Vol. II., p. 171.) 



Zoarium massive, or growing in circular or flabellate 

 expansions, eelluliferous on one side, the other covered with 

 an epitheca. Cells arising from the epitheca, with transverse 

 tabulae, and circular or trilobate, sometimes operculate, 

 apertures, which are often denticulate, and have the pos- 

 terior portion of the peristome arched and elevated. Space 

 between apertures smooth. Intercellular spaces vesicular. 



Lichexalia stellata. Hall. (Fig. 66A.) (Pal. X. Y., 

 Vol. VI., p. 195, PL LVIII.) 



