Description of Ten New Species of Fossils. 



83 



particular than E. tuberculatus. The second radials are quadrangular, 

 very little wider than high, and about two thirds as large as the first 

 radials. The third radials are hexagonal, sides very unequal, the two 

 upper sloping sides and the base being the longer, and the other three 

 the shorter ones. The first secondary radials are very large, and rest 

 upon steep sloping sides of the third radials, which gives breadth to 

 this part of the body. The second secondary radials, and the inter- 

 secondary radials, are wider in proportion to their length than is usual 

 with the plates in this genus. The interradial is a large, ten-sided 

 plate, a little longer than wide, that supports upon its two upper sides 

 a pair of interradials, which support the interbrachials. 



This species is readily distinguished from E. ccelatus, by the angular 

 extension of the plates below the point of attachment with the column, 

 and from all other described species by its general form. 



It was collected by W. C. Egan, of Chicago, Illinois, in the Niagara 

 Group, at Bridgeport, within the corporate limits of the city. 



Lyriocrinus scdlptilis, n. sp. 



Plate III., fig. 6, basal view, not indicating all the plates ; fig. 6a, lateral view from the 

 azygous side ; fig. 66, summit view, but not showing half the plates that are on the specimen. 

 All from the same specimen. 



Calyx, below the arms, saucer shaped, vault depressed between the 

 arm bases, possessed of very slight convexity, except as to a swelling 

 upon the azygous side that terminates in a sub-central proboscis. The 

 plates are convex, those below the arm bases are sculptured, and the 

 sutures are well defined. 



Basals. — There are five small basal plates situated within the small 

 columnar cavity, and covered by the column. These are beautifully 

 shown by the specimen, but are not indicated in the figure. 



Subradials. — There are five heptagonal subradials. These are the 

 larger plates of the body, with the exception of the first interradials, 

 and being longer than wide, they form a star-shaped outline, with 

 truncated rays. The two shorter sides abut upon the basals, and the 

 two longer sides support the radial series. 



Primary radials. — There are three primary radials in each series. 

 The first is pentagonal, wider than long, a little smaller than the sub- 

 radials, rests between the sloping sides of the latter, and has the 

 longer side uppermost. The second is hexagonal, wider than long, 

 and wider than the first radial; the lateral sides are the shorter, and 

 the upper and lower sides the longer. The third radial is pentagonal, 



