36 



Wall's Cove and Becsie River Bay ; Div. 1, A. G. J. Ricliardson, T. 

 C. Weston. 



P.iiuSTlCA,n.sp. — Polyzoary consisting of small flattened, branching fronds 

 with the sides gently and uniformly convex. Cells ovate, with a slightly 

 elevated margin and a fine raised line between the rows, three or four 

 in the length of one line and about six in the same space in width. When 

 the surface is worn the margins of the cells and the lines between the rows 

 totally disappear. The specimen examined is 13 lines in length and li 

 lines in its greatest width where there are eight rows of cells. It gives 

 off three branches at an angle of about 45°. The Jumpers ; Div. 4, A. G. 

 J. Richardson. 



P. TENERA, n. sp. — Polyzoary consisting of narrow flattened branching 

 fronds with the sides gently and uniformly convex. Cells ovate with a thin 

 elevated margin ; an obscure elevated flexuous line between each two rows. 

 There are about five cells in the length of one line and eight in the same 

 space in width. The edges of the fronds are moderately acute. The length 

 of the cells is about one-third greater than their width. In perfectly 

 preserved specimens the surface between the cells seems to be minutely 

 tuberculated. The fronds are, in general, a little over one line in width 

 with about ten rows of cells. Point Laframboise and Gamache Bay ; Div. 

 1, A. G. J. Richardson. 



P. ARGUTA, n. sp. — Polyzoary of narrow, branching rather strongly 

 convex fronds. Cells oblong-ovate, about four in the length of one line 

 and eight or nine in the same space in width. One specimen is nearly a 

 line wide with eight rows of cells ; another half a line with four rows. Cape 

 Sand Top Bay ; Div. 2, A. G. J. Richardson. 



P. ALCYONE, n. sp. — The polyzoary of this species resembles that of 

 P. rustica, but differs in having the cells more nearly circular and smaller, 

 there being, on an average, ten or eleven in the length of two lines. Two 

 miles west of Chicotte River ; Div. 4, A. G. J. Richardson. 



Genus Helopora, Hall. 



" Simple or branching cylindrical stems, often swelling at the upper ex- 

 tremity, poriferous on all sides ; pores oval or subangular, arranged between 

 longitudinal elevated lines." (Pal. N. Y., v. 2, p. 44). 



Some of the following species do not come exactly within the above de- 

 scription, but as there are intermediate connecting forms I do not think it 

 necessary to institute a new generic group for their reception. Eichwald 

 places these fossils in Vinculana, apparently without sufficient reason. 



H. LINEATA, n. sp. — Polyzoary apparently hexagonal, less than half a line 

 in thickness and rarely an inch in length, sometimes branched, the branches 



