Marine Alga of the Maritime (Provinces . 63 
branch of our flora. Our aim has been to gather up the 
knowledge that has been attained of our marine forms of 
vegetation, and incorporate it in the form that follows, hoping 
that it will serve as a guide to the more careful study in 
future of these interesting plants. 
I desire to express my obligation to Mr. J. E. Humphrey 
and Dr. W. G. Farlow of Harvard University for their deter- 
mination of critical species. 
St. John, March, 1887. 
Introductory List of the Marine AuGiE of the Mari- 
time Provinces, with Notes, by G. U. Hay, Ph. B., 
Saint John, and A. H. MacKay, B. A., B. Sc., F. S. 
Sc., Principal of Pictou Academy, N. S. 
ORDER I. — CRYPTOPHYCEiE. 
1. Clathrocystis roseo-persicina, Cohn. On mud in brackish pond, 
Pictou harbour, MacKay ; on decaying algse along shore of Gulf 
of St. Lawrence, Hay. 
2. Oscillaria subtorulosa, (Breb). On floating balls of Polysiphonia, 
in Pictou harbour, MacKay. 
3. Lyngbya majuscula, Harv. Pictou harbour, MacKay. 
4. L. sestuarii, Liebm. In brackish pond, Pictou harbour, MacKay. 
order rr. — ZOOSPORES. 
5. Ulva lactuca. (Linn ) Le Jolis, Pictou harbour, MacKay. 
(а) . Var. rigida, (Ag.) Le Jolis, and 
(б) . Yar. lactuca, Le Jolis, are common in tide pools along the 
southern coast of New Brunswick, Hay. 
( c ). Yar. latissima, Le Jolis. Richibucto River, Fowler. Common 
in brackish waters along the whole coast of New Brunswick, 
Hay. 
6. U. enteromorpha, Le Jolis, also 
(a) . Yar. lanceolata, Le Jolis, and 
( b ) . Yar. compressa, Le Jolis. Pictou harbour, MacKay ; Frye’s 
Island, St. John, Hay. 
(c) . Yar. intestinalis, Le Jolis. Yery common, Richibucto River, 
Fowler ; St. John, Hay. 
