170 HAY ON MARINE ALG.E 



recognise them, might, in the case of shipwrecked mariners, be of great value in sustaining 

 life for a considerable time. 



Among the rarer forms of Algae that occur on our coast the following may be men- 

 tioned as worthy of notice : — 



Utothrix collabens, a small green Alga, found occurring at intervals on the inner shores 

 of Miscou and Shippegan. This is a beautiful species, with tufted slender filaments of 

 dark green, and does not occur on our southern shores, and but rarely in New England. 



Odonthalia dentata, though found at various points on the Gulf of St. Lawrence, and on 

 the southern shores of Nova Scotia and New Brunswick, has not yet been detected on the 

 New England coast. It is a very attractive species, of a deep red color, and occurs on 

 rocks and stones in deep water. 



Polysiphonia fibrillosa, found oil the north side of the Island of Miscou in considerable 

 abundance, has hitherto been detected only at one place north of Cape Cod, referred to by 

 Dr. Harvey in the " Nereis." It is one of the most beautiful species of Polysiphonia, and 

 growing abundantly in tufts in shallow water, is a delicate and attractive form. Another 

 species that is collected for its beauty, although not a rare species, is CaUithamnion Pylascci, 

 which I detected at Grand Manan, although I have not observed it at any point east of 

 that station. Its occurrence, as well as that of forms common on the New England coast, 

 may be expected on further investigation. 



List of the Marine Algje of the Maritime Provinces, with Notes. 



By G. U. Hay and A. H. MacKay. 



Order I.— CRYPTOPHYCE^E. 



1. Clathrocystis roseo-persicina, Colin. On mud in brackish pond, Pictou harbour, 



MacKay ; on decaying Algae along shore of Gulf of St. Lawrence, Hay. 



2. Oscillaria subtortjlosa, Breb. On floating balls of Polysiphonia, Pictou harbour 



MacKay. 



3 Lyngbya majuscula, Harv. Pictou harbour, MacKay. 



4. L. yESTUARii, Liebm. In brackish pond, Pictou harbour, MacKay. 



Order II.— ZOOSPORES. 



5. Ulva lacttjca, (Linn.) LeJolis. Pictou harbour, MacKay. 

 (a). Var. RIGIDA, (Ag.) Le Jo/is and 



(/;.) Var. lactuca, Le Jolh, are common in tide pools along the southern coast of 



New Brunswick, Hay. 

 (c.) Var. latissima, Le Jolis. Richibucto River, Fowler. Common in brackish waters 



along the whole coast of New Brunswick, Hay. 



