CANADIAN FOSSILS. 47 



Lecanoceinus elegans, Billings. 

 Plate IV. Figures 4a, 46. 



(L. ETiEGANS, Report Geological Survey of Canada, 1856, page 2T8.) 



Description. — Cup, small, conical, three lines in height from the 

 base to the upper margin of the first primary radial plate, at which 

 level the breadth is also about three lines ; the breadth of the base 

 is One line and a half, and the top of the column scarcely less ; the 

 first primary radials are a little broader than high, and rendered 

 slightly heptagonal by the truncation of their upper lateral angles ; 

 the second primary radials are narrower and quadrangular, or 

 obscurely hexagonal ; the third are pentagonal ; the length of each 

 is about a line and a half. The third in each of the three rays 

 exposed in the only specimen seen, supports two secondary rays of 

 five joints each, and then divides into two tertiary rays ; these latter 

 are again divided. The rays above the fourth division are articulated 

 in two series. Between the primary rays are several small intef- 

 radials. The column is circular, with round-edged joints, from four 

 to six in one line ; length of ray from the base of first primary radial 

 to the extremities, one inch and one fourth. 



Explanation op Figures. Plate IV. 



Figure 4a. A specimen shewing one of the hexagonal basal plates. 

 " 4&. Several joints of the column, a little enlarged. 



Locality andformation. — Trenton limestone ; City of Ottawa. 



LeCANOCRINUS LiEVIS. 



Plate IV. Figure 3a. 



(L. LiEVIS, Report Geological Survey of Canada, 1856, page 278.) 



Description. — This species is shorter than the preceding, and has 

 only four joints instead of five in the secondary rays ; the upper part 

 of the column is round and smooth. In other respects there is much 

 resemblance between the two, but still I think them distinct. 



Explanation op Figures. Plate IV. 

 Figure 3a. A specimen slightly crushed. 



Locality and formation, — Trenton limestone ; City of Ottawa. 



