214 NEW YORK STATE MUSEUM 



tuchy fossil corals) and others, have included them in the genus 

 Eridophyllum E. and H. ; while Rominger {Cfeol. sur. 

 Michigan, 1876) considers Eridophyllum a synonym of 

 Diphyphyllum Lonsdale, and places these forms in the latter 

 genus; but Freeh in Roemer's Lethaea Palaeozoica p. 356, speak- 

 ing of Eridophyllum, says : " Lonsdale's genus Diphy- 

 phyllum in fact embraces corals of the Carboniferous lime- 

 stones of a very different structure." 



The forms included in the genus Synaptophyllum have 

 generally been considered of the same character as Erido- 

 phyllum verneuilianum, E. rug o sum, E. hu- 

 ronicum, etc. Externally they have a superficial resem- 

 blance, but may easily be distinguished by the character of the 

 radiciform expansions. In Eridophyllum these are flat, 

 proceed from one side of the coral only, and are not connected 

 with the interior of the adjacent coral; while in this genus they 

 are cylindric, proceed from all portions of the coral, aud usually 

 the expansions of adjacent corals are opposite, meeting and co- 

 alescing midway between the corals. 



Eridophyllum is a valid genus, including such forms as 

 E. verneuilianum E. and H., E. r u g o s u m E, and H.y 

 E. huronicum Rominger^ etc. 



SCHOBNOPHYLLUM, gotl, flOV. 



Oorallum consisting of a large mass, formed by the close ag- 

 gregation of very long cylindric stems; exterior with strong con- 

 centric wrinkles of growth and conspicuous costae. There are 

 frequent slender processes from the coral, about 3 or 4 mm in 

 length, regularly diminishing in size to the extremity, ascending, 

 continuing to the adjacent corallum and serving as supports. 



The gemmae spring from the margin of the calyx, the parent 

 corallum continuing growth, thus giving to the younger corals 

 the appearance of proceeding from the side of the parent coral- 

 lum at a great distance from the calyx; septa comparatively few 

 in number; alternate septa inconspicuous, often apparently ob- 

 solete; cardinal septum continuing a short distance beyond the 



