226 The Ottawa Naturalist. [February 



lum aggregate, forming large masses sometimes a foot and a 

 half across and over a foot high, composed of upwardly directed, 

 flexuous, subcylindrical corallites that increase rapidly by lateral 

 calicinal gemmation from a single parent corallite. As a result 

 of their mode of growth from a small basal beginning, the coral- 

 lites are somewhat divergent, those near the confines of the 

 corallum sometimes growing almost horizontally. Corallites 

 strongly and irregularly annulated, growing close together, 

 frequently touching each other, their coherence being often 

 strengthened at the points of contact by an increased develop- 

 ment of the ridges of growth, or from want of space they may be 

 closel}' pressed against one another for some distance. Mature cor- 

 allites varying in diameter from i or 2 to over 3 cent., the young 

 ones beginning with an average breadth of about 5 mm, and 

 growing upward beside the old stems with a very slow increase 

 in size, Epitheca thin, complete, shewing minor, transverse 

 growth markings. Inner structure vesicular, similar to that of 

 C. vesiculosum from which this species apparently differs only in 

 its aggregate form. 



Locality and foniiation. — Abundant in the Corniferous form- 

 ation of Ontario ; Rominger mentions its occurrence in large 

 clusters in the Hamilton group of Thunder Bay. 



( To be continued?) 



THE WATER OF THE ILLECVLLIWAET GLACIER. 



• ■ By Frank T. Shutt and A. T. Charron. 



It was our good fortune, through the kindness of Dr. 

 Saunders and Dr. Fletcher, to obtain, during the past summer, 

 samples of water produced by the melting of the ice of the 

 glacier known as the Great or Illccilliwaet Glacier, which can 

 be reached by a rather arduous walk of one and a half miles from 

 Glacier Station, B.C., on the main line of the Canadian 

 Pacific Railway. Both samples were collected within a few feet 

 of the glacier's irregular face, down which at the time the waters 



