53 



This species bears some resemblance to T. coxunum, but that is a 

 small species, depressed convex on the ventral side, which alone is 

 sufficient to distinguish it. Indeed there may be some doubt about 

 this species being a true Temnochilus, but it seems, at least, to be 

 iiearer related to that genus than to any other. 



Found in the Kaskaskia Group, on Fish Creek, in Greene county, 

 Indiana, and now in the collection of Wm. F. E. Gurley. 



SUBKINGDOM CCELENTERATA. 

 CLASS ANTHOZOA. 

 Subclass ZOANTHAMA. 

 Family CYATHOPHYLLIDiE. 



AMPLEXUS (?) ROCKFORDENSIS, n. Sp. 



Plate III, Fig. 22, side vieiv; Fig. 23, transverse section. 



Corallum medium size, simple, elongate, somewhat obconoidal, 

 more or less twisted or curved. Epithecal crust very strongly de- 

 veloped, entirely covering the septa, and bearing , numerous spines 

 irregularly scattered over the whole surface. 



A transverse section shows twenty-eight septa that reach about 

 one-third of the way to the center. 



Our specimen does not show the calyx, and we have no knowledge 

 of the tabula? except the transverse section shows a solid center in 

 the corallum. The constrictions, if any exist, are covered by the 

 epitheca. 



We are not certain that this species belongs to Amplexus, but it 

 is certainly a Cyathophylloid coral, and the solid center indicates an 

 Amplexus; but if there are no constrictions it belongs elsewhere. 



The remarkably thick, wrinkled, and spine-bearing epithecal 

 crust will serve to distinguish it until more is known of the internal 

 structure. 



Found in the Kinkerhook Group, at Rockford, Indiana, and now 

 in the collection of Wm. F. E. Gurley. 



