102 CONTRIBUTIONS TO CANADIAN PAL J30NTOLOGY. 



Currie, near Thedford, in 1882. At the same locality and date two 

 other and similar s^^^cimens were obtained by Mr. Currie, but the 

 original of figures of 2, 2a and 2b on Plate 13 is the only one that the 

 writer has seen. 



Its dimensions are : height, fourteen millimetres; maximum breadth, 

 sixteen mm.; breadth at base, eight. 



As viewed in one direction its outline is somewhat hatchet-shaped 

 with a ti'uncated base, while, as viewed in the op])osite direction, its 

 outline is wedge-shaped with the sides slightly convex. The centre of 

 the base is rather deeply excavated and surrounded by a single row of 

 concave and somewhat oblique facets. Froni one point of view the plate 

 broadens rajjidly from the base upwards about as far as the middle, and 

 its upper margin is semicircular, while, from another (at nearly a 

 right angle to the first) it narrows rapidly from below upwai-ds and 

 outwards into a thin and sharp edge. 



To the naked eye the surface of the plate seems smooth, but when 

 examined under a lens the base is seen to be minutely granulose and 

 the sides and edge minutely corrugated in a longitudinal diicction, 

 though one of the flattened sides seems to be much less distinctly cor- 

 rugated than the other. 



Spine of dome or Crinoid. (Genus and species unknown.) 

 Plate 13, figs. 3, 3a. 



The curious flask-shaped body represented on Plate 13, which is 

 evidently a spine from the dome of some unknown crinoid, was also 

 collected by the Eev. Hector Currie, at Thedford, in 1882, and presented 

 by him to the Museum of the Survey. 



Its apex is unfortunately broken oft', but the part which is preserved 

 is foui-teen millimetres in length or height. The centre of the base is 

 rather dee]fly excavated and surrounded by a single row or I'ing of 

 eight obli(|ue facets, some of which are faintly concave. Immediately 

 above the base the spine is swollen into a rather nairow bulb-like 

 expansion, whose maximum breadth is five millimetres, and above this 

 it narr(jws t;i-adually, the breadth at the broken summit being about 

 two mm. 



When viewed under a lens tlie facets which surround the central 

 excavation of the base are seen to be minutely granulose, and the bul- 

 bous part of the spine is ornamented with irregular and longitudinally 

 disposed, but somewhat twisted, thin and flat lamellar ridges, which 

 are more oi- less broken up into low spines whose apices are directed 



