46 CANADIAN FOSSILS. 



Pal^oceinus pulchellus, Billings. 



Description. — The same as P. angulatus, but with a round column. 

 The surface of the specimen is a good deal eroded, and yet it can be 

 seen that the surface is radiated, as in P. ansidatus. The column is 

 well preserved, and is one line wide at the base of the cup, from 

 which point it rapidly tapers to the thickness of half a line at the 

 length of four lines. Length of cup, three lines. 



Locality and formation. — One specimen from the Trenton limestone, 

 City of Ottawa. 



Genus Lecanoceinus, Billings. 



(Lecanocrinus, Hall, Palceontology of New York, Tolume ii., page 199.) 



Formula : 



Basal plates, 3. I Radials, 1X5. 



Sub-radial plates, 5. | Azygos inter-radials, 1-3. 



Generic characters. — In this genus there are three basal plates, 

 one of them pentagonal and the other two hexagonal ; in the second 

 series there are five sub-radial plates, two of which are supported 

 by the two hexagonal basal plates, while the other three alternate 

 with these latter. Alternating above the sub-radials are five primary 

 rays of three joints each, and above these, ten secondary rays. 

 Some of the species have several small inter-radial plates in one or 

 more of the divisions between the primary rays. 



I have placed the following species in the above genus, although 

 it appears probable that some other dispc^ition should be made of 

 them. The specimens are not sufficiently perfect to enable me to 

 make out all the characters ; and as they are more nearly related to 

 Lecanocrinus than any other Silurian genus, it seems to be the better 

 course to arrange them in that group provisionally. 



