46 A GEOLOGICAL AND NATURAL HISTORY SURVEY OF CANADA. 



illusti'ations will be found on plate 3 of my forthcoming report on 

 Minnesota Bryozoa (Yol. III. Final Eep't. Geol. and Nat. Hist. Sur. of 

 Minn.). 



ScEPTROPORA, Ulrich. 

 Scepiropora, Ulrich, American Geologist, April, 1888, vol. 1, No. 4, p. 228. 



This genus being founded upon specimens from Manitoba, I have 

 thought it well to republish the descriptions given in the " American 

 Geologist." 



" Zoarium articulated ; segments numerous, short, sceptre or club- 

 shaped, the lower half striated, non-celluliferous, its extremity bulbous; 

 upper half more or loss expanded, celluliferous, and with a large socket 

 at the centre of the top ; occasionally with two sockets when the seg- 

 ment had articulated with two succeeding joints. Zooecia sub-tubular, 

 radially arranged about a central axis, their apertures subovate, and 

 arranged between vertical lines."* 



SCEPTROPORA FACULA, Ulrich. 



Sceptropora facula, Ulrich. American Geologist, April, 1888, vol. 1, No. 4, p. 229. 



Fig. 2. Sceptropora facula^ Ulrich, a, segment of the average size and appear- 

 ance ; 6, vertical section of a segment, showing the tubular zooecia and central 

 axis; c, transverse section of the cylindrical lower half of a segment; d, trans- 

 verse section of expanded portion of the largest segment seen. All magnified to 

 eighteen diameters. 



*In looking over some of my collections from the Clinton at Hamilton, Ont., I was so fortun- 

 ate as to find a number of segments of what will probably prove another species of this genus. 

 They have a similar striated base, above which they expand rapidly into the shape of a short 

 thick club. The top is rounded and, like the sides, covered with cell aperture?. On young 

 examples, some of which are comparatively slender, the apertures of the zooecia are ranged in 

 longitudinal series between granulose raised lines. As the diameter of the segments increases, 

 these lines assume a zig-zag direction and new rows of zooecia are interpolated, each placed so 

 as to alternate with the old cells. The apertures are slightly oblique, of rounded form (some- 

 times nearly circular), and larger than those of the associated Heloporafragilis, Hall ; there are 

 three in one millimetre longitudinally. The segments vary in length from less than two mm. to 

 more than four mm., and the diameter of the upper half from 05 to 1'8 mm. As this is an easily 

 recognized and quite distinct speciesj I propose to call it, provisionally, Sceptropora fuatiformis. 



