39 



a little upwards, so as to bring the apex over the cell. The cells are 

 usually arranged in longitudinal rows running the whole length of the 

 stem, sometimes separated throughout, often in contact. In specimens 

 where the cells of contiguous rows alternate with each other there is also 

 a distinct obhque transverse arrangement, the cells then appearing to be 

 rhomboidal (although they are not so.) When the rows are separated 

 from each other there is a distinct longitudinal groove between each two 

 but no elevated line as there is in H. lineata. When the cells are in 

 contact laterally the groove is broken up into a series of small triangular 

 or rhomboidal pits, the former occurring in cases where the cells alternate 

 and the latter where they touch each other at the mid-length. The lower 

 extremity is usually striated for the distance of half a line, and seems to 

 terminate in an obtuse point. The upper extremity is in general abruptly 

 truncated ; specimens with this part rounded sometimes occur, but it is 

 not certain that such is the natural form. When the cells are closely 

 crowded together they become irregularly polygonal. There are from six 

 to eight cells in the length of one line, and from eight to fourteen rows. 

 Length from two to ten lines, the shorter specimens being evidently, in 

 most instances, fragments ; diameter from half to two-thirds of a line. 

 East Point, two miles east of Jupiter River, South Point and many other 

 localities on the south and east sides of Anticosti ; Divs. 2, 3, A. G. J. 

 Richardson. 



H. STRiATOPORA. — The only specimen collected, of this species, is a 

 cylindrical branched polyzoary seven lines in length and half a-line in 

 diameter. In the lower half there are a few widely separated nearly cir- 

 cular cells 'about one-tenth of a hne in width each, with an obscurely ele- 

 vated margin. The remainder of the surface is without cells but covered 

 with fine somewhat irregular longitudinal strige. Four miles west of South 

 West Point, Anticosti ; Div. 3, A. G. J. Richardson. 



H. IRREGULARIS. — Polyzoary irregularly cylindrical branched with, 

 occasionally, some bulbous enlargements. CeUs sub-circular about one 

 twenty-fifth of a line in diameter and their own width separate from each 

 other, the margin obscurely salient. The stems and branches are from 

 one to three lines in diameter, and have a superficial resemblance to small 

 specimens oi Stenopora fibrosa. Challoupe Rivers, Anticosti ; Div. 3, A. 

 G. J. Richardson. 



H. Circe. — Polyzoary cylindrical, branched, hoUow. Cells sub-ovate or 

 sub-circular, in contact with each other or nearly so, from eight to eleven 

 in the length of one hne. The specimen is nearly a line in diameter and 

 three lines in length ; it is a branched fragment. Two miles east of Jupiter 

 River, Anticosti ; Div. 3, A. G. J. Richardson. 



