54 



Stone Lilies oj the Trenton Limestone. 



cause tliey all perished at the same time, and were buried by the deposit of 

 Bedimeut which fell upon them, and formed the thick beds of limestono 

 found resting upon their remains. 



Out of all procured at this place, however, there was not one which a 

 pala^ontolor^ist would call a good specimen. Those figured are crushed, and 

 have the plates broken, eroded and displaced, so that no regularity in their 

 arrangement can be perceived. It is only by examining the fragments of 

 all the cups found in this locality, and comparing them, and establishing- 

 their specific identity with others more perfect, found elsewhere, that they 

 can be shewn to be individuals of a species of Glyptocrinus. 



Fig. 3» — Glyptocnnus ramutosus. New species, Trenton limestone, 

 Brigham's Lake, Township of Hull, County of Ottawa. 



Description.— The body or cup of this species is covered with smooth 

 plates, and broadly rounded or obscurely pentagonal at the bottom. The 

 height is about equal to the diameter at the base of the free rays. Five 

 Btrong rounded ridges or keels proceed from the base up the sides, following 

 the centre of the rays, as shewn in Fig. 2. Upon the third plate from the 

 base of each ray, the ridge divides into two branches, which proceed up the 

 secondary rays to the base of the free arms. There are four plates in each 



