49 



•establislied at the Capital in connection tberewith large aqviaria for the 

 display of live fishes from this vicinity, and a working model of a fish 

 hatching apparatus. With the aquaria could also be shown stuffed 

 specimens or models of the chief fish of the Ottawa valley, and the 

 extension of the Canadian Pacific Railway westward opening to us the 

 great basins of Nippissing and Teraiscaminge, with their rarer speci- 

 mens, a central figure of fish life might be constituted instructive to 

 naturalists, attractive to strangers, and always interesting to the people 

 of this city and district. 



NOTES ON, AND DESCRIPTION OF, SOME FOSSILS FROM 

 THE TRENTON LIMESTONE. 



W. R. Billings. 



HETEROCRINUS BELLEVILLENSIS, N. SP. {See Plate.) 



Cup about as wide as high, tapering from 0-33 inch wide at top to 

 0'18 inch at the column. 



Basals once and a half as wide as high, five in number, pentagonal. 



First radial s five, the right posterior and the left anterior pentagonal, 

 the anterior heptagonal, the right anterior hexagonal ani the left 

 posterior octagonal ; the right posterior supports a hexagonal plate with 

 two upper sloping faces, the right of which supports a range of four 

 primary radials and the left the anal series, the left posterior and the 

 anterior each bear three primary radials and the left anterior and right 

 anterior each four, the upper plate in every ray being an axillary. 



The first anal plate is pentagonal, and rests principally on the 

 second plate of the i-ight posterior series, but, slightly, on the first radial 

 plate of the left posterior series ; following, and within the cup, are first 

 a hexagonal and then a quadrangular plate, beyond which the exact * 

 arrangement is difficvilt to determine. 



Arms ten, robust, rounded on the dorsal side and composed of pieces 

 measuring 0'12 inch in width by 0*08 inch in height at the bases, 

 and which taper upwards until, at a distance of 2 laches, they are 0"06 

 inch in width by a trifle less in height. In two inches of arm there 

 are 34 pieces. The arm pieces are quadrangular, excepting that those 



