Fossils of the Chazy Limestone, 427 



we have Hybocrinus and Rhodocrinus, and without much doubt 

 also Glytocrinus and Dendrocrinus in the Chazy ; but Palceocrinus, 

 Pachyocrinus, and Blastoidocrinus are not yet known in higher 

 rocks. Nearly all the species are confined to that part of the 

 country which lies east of Kingston. West of that city, nineteen 

 of the species above given in the list of those that are common to 

 the Chazy and higher rocks., have been found, and also R. plena 

 and M. parviuscula. Out of 129 species, only 21 have been 

 found west of Kingston. 



Pleurotomaria staminea and Bellerophon sulcatinus have not 

 been seen in the Chazy in Canada ; but they both occur in the 

 Black River. 



I think it]more than probable that when the fossils of these rocks 

 shall have become better known, the above results will be modified 

 somewhat; but to no great extent. It must be always borne in 

 mind that many of the species are represented by mere fragments, 

 and that although we are able in general to shew that they are 

 distinct, yet they do not furnish the data for detailed specific 

 descriptions. I shall, not therefore, for the present, name those 

 imperfect specimens. 



Zoophyta. 6 Species. 



Stenopora fibrosa. (Gold fuss, s.p.) 



Chatetes lycoperdon, — branched variety. 



This species is very abundant in the Chazy limestone in several 

 localities on the island of Montreal, but more particularly about 

 half a mile east of the village of St. Laurent. It also occurs at 

 the Mingan Islands in the same formation. There is apparently 

 no difference between the Chazy and Trenton specimens. 



Stenopora patula. (N.s.) 



Description. — This species which perhaps should be regarded 

 as only a variety of Stenopora pet ropoli 'tana, consists of broad 

 flat irregular expansions from one to six inches in diameter and 

 from one fourth of an inch to one inch in thickness. The tubes 

 are about the size of those of S. fibrosa. 



Locality and formation. — Island of Montreal. Chazy. Not 



common. 



Stenopora adherens. (N.s.) 



Description. — Corallum consisting of wide flattened thin mas- 

 ses, usually incrusting other fossils and sometimes composed of 

 successive layers. The cells in such specimens as I have seen are 



