144 NEW YORK STATE MUSEUM 



Distinguishing characters. Corallites in juxtaposition or separated 

 by cellular interspaces; large meshes of the network irregular, 

 greatly varying in size; corallites oval in cross-section, united by 

 their narrower sides; epitheca with fine lines of growth and occa- 

 sionally strong wrinkles. 



Found in the Lockport limestone at Lockport (Hall), and 



Niagara. When silicified, the coral may be well preserved, but 



otherwise it is usually almost destroyed or replaced by various 



minerals. 



Genus heliolites Guettard 



[Ety. : T^co?, the sun; X(do<s, a stone] 



(1770. Mem. 3:454) 



Corallum spheroidal, pyriform, hemispheric, or rarely ramose. 

 Corallites (macrocorallites) cylindric, comparatively few in number 



Fig. 40 Heliolites elegans witli enlargement of calyxes 

 and longitudinal section 



and furnished with 12 lamellar infoldings of the wall, or pseudo- 

 septa. Smaller corallites (microcorallites) completely investing the 

 larger ones, more or less regularly polygonal in form, with distinct 

 walls, completely amalgamated with one another and with the walls 

 of the larger corallites. Mural pores absent. Both kinds of coral- 

 lites with tabulae, most numerous in the smaller corallites. Base 

 of corallum covered by a peritheca showing lines of growth. 



