82 



Cincinnati Society of Natural History. 



the pairs in the interradial spaces, at the height of the first secondary 

 radials, by having a few more plates in the interbrachial spaces, by 

 the less convexity of its vault, and by the flattened instead of concave 

 depressions between the ambulacral ridges. 



Collected by W. C. Egan, in the Niagara Group, at Chicago, 111. 



EUCALYPTOCRINUS KOTUNDUS, n. Sp. 



Plate III., fig. 4, the interbrachials are not contracted toward the top as shown in 

 the figure ; fig. 4a, maybe erased, as it teaches nothing ; fig. 46, is a small specimen, but the 

 vault is made to appear too high. 



Bod}' round or globular, calyx very shallow, saucer-shaped, height of 

 the cast of the dome a little more than the depth of the calyx, and the 

 height of the two rather more than the length of the canal leading 

 from the dome to the top of the interbrachials. 



First radials wider than long, and larger than the succeeding ones. 

 Second radials, quadrangular, wider than long. Third radials, wider 

 than long, lower lateral and upper sides very short. 



Large inter-radial, ten sided, and a little longer than wide, the others 

 small and narrow. 



Canal leading from the dome to the top of the interbrachials rather 

 large, but not extending be} 7 ond the interbrachials, 



Collected by W. C. Egan Esq., in the Niagara limestone, at Chicago, 

 Illinois. 



Remarks. — This species is distinguished by the almost perfectly 

 globular form of the body including the brachials and interbrachials, 

 by the short saucer-shaped calyx, and comparatively large canal 

 leading to the top of the interbrachials. 



EUCALYPTOCRINUS TURBINATUS, n. Sp. 



Plate III., fig. 5, for the purpose of showing the form and height of the cast of the vault ; 

 fig. 5a, is very imperfectly drawn, and makes the calyx appear too high, and does not show 

 the constriction, the plates indicated on 5a, if drawn upon fig. 5, would give a more correct 

 idea of the species. 



Body rather large, the base distincti}' pentagonal, the angles being 

 at the junction of the plates. Calyx very rapidly expanding, though 

 obscurely constricted in the middle part. Width at the arm bases 

 nearly twice as great as the height of the cup. Cast of the dome 

 rather low, so that the entire height of the cast from the base to the 

 top of the vault is less than the diameter at the arm bases. 



The first radial plates are hexagonal, wider than long, and in the 

 cast, show the pentagonal outline and prolongation at the sutures be- 

 low the point of junction with the column. It is more marked in this 



