332 REVIEWS GEOLOGICAL SURVEY OF CANADA. 



they are composed of numerous concentric layers resembling those of an exogenous 

 tree. No traces of roots or branches have been distinctly observed. There appear 

 to be two species, distinguishable only by the characters of the surface. 

 Beatricea nodulosa. 



Description. — The surface of this species is covered with oblong, oval, or sub- 

 triangular projections from one to three lines in height, each terminating in a 

 rounded blunt point which is nearer to one end of the prominence than to the 

 other. Some of the projections are six or seven lines in length at the base, and 

 half as wide. Generally they are smaller, and often with a nearly circular base ; 

 the distance between them is from one to three lines. They exhibit in some spe- 

 cimens a tendency to an arrangement in rows following the length of the stem. 

 In some instances these rows wind around the stem in spirals. In addition to 

 these characters, the whole surface is fretted with minute points, and these when 

 partially worn show a perforation in their centres. 



In a specimen three inches in diameter, the diameter of the central tube is three* 

 quarters of an inch ; the transverse septa are thin, verj concave, and at distances 

 from each other varying from one hne to one inch. 



Locality and Formation. — Anticosti, at Wreck Point, Salmon River and Battery 

 Cliff. Lower Silurian. 



Collector.— J. Richardson. 



Beatricea undulata. 



Description. — The surface of this species is sulcated longitudinally by short ir- 

 regular wave-like furrows from two lines to one inch across, according to the size 

 of the specimen. In other respects it appears very like B. nodulosa. The largest 

 specimen is ten feet five inches in length, about eight inches in diameter at the 

 large end, and six inches and a-half at the smaller extremity. Another short 

 fragment is fourteen inches in diameter. 



All the specimens of both species are replaced by carbonate of lime, but show 

 more or less perfectly the septate character of the central tube and the concentric 

 arrangement of the layers of the stem. They are generally broken up into short 

 pieces. 



Locality and Formation. — Cape James, Table Head, two miles east of Gamache 

 Bay, and numerous other localities in the Middle Silurian. 



The four Reports contributed by Professor Sterry Hunt, embrace a 

 wide and varied range of investigation. In tbe Report for 1853, tbe 

 composition is given of several mineral springs occurring in diiferent 

 parts of tlie Province ; with analyses of the waters of the St. Law- 

 rence and Ottawa rivers ; further analyses of the shells of lingulse 

 and other fossil genera, in which, it will be remembered, Mr. Hunt 

 first made the important discovery of phosphate of lime as the pre- 

 dominating constituent ; also, the results of some chemical examina- 

 tions of limestones and dolomites belonging to the Laurentian series ; 

 assays of argentiferous galena from Lake Superior, the Chaudiere 

 Rapids, and other places ; and 'some assays of gold from the Riviere 



