40 List of the St, Lawrence Alga. 



throughout the north Atlantic extending on the Euro- 

 pean side from the glacial ocean to the southern shores 

 of France." Harv. 

 Iridaea edulis, Stack. Harv. Man. p. 150. Not described among 

 the American species in the Ner. Bor.-Ain., the speci- 

 men before us is small, but the characters are well 

 marked. 



Halosaccion ramejitaceum, J. Ag. P. 194. Common on every 

 shore. Murray Bay, Point des Monts. 



¥-aice\\scrm fastigiafa, Lyngb. P. 195. In rock pools near low^ 

 water mark. Murray Bay and Metis. A robust speci- 

 men was collected by Mr. Bell,Can. Geo. Sur. at Gaspe. 



Furcellaria divaricata, Harv. MS. Deep water, Murray Bay. 

 This plant is neither in the Manual nor the Ner. Bor.- 

 Am. of Harvey, but is so named by him in MS. 



Order XIIL — Ceramiace^. 



Ceramium ruhrum, Ag. P. 213. Abundant on stones and other 

 Algae, Point des Monts. A most Protean plant. 



CevB.m.i\im fastigiatum, Harv. P. 217. Metis. 



Ceramium Hooperi, Harv. MS. On perpendicular sides of 

 rocks. Murray Bay and St. Nicholas. Not Common. 



Ceramium ^raci7Zimwm, Kutz. Harv. Man. p. 163. Collected 

 by Mr. D. A. Poe at Metis. 



Ptilota serrata^ Kutz. P. 222. Very abundant at Murray Bay. 

 Ptilota elegans, Bonnem. P. 224. In the collection of Mr. D. 

 A. Poe. North shore. 



Callithamnion Pi/laiscei, Mont. P. 239. A most beautiful and 

 delicate plant. Murray Bay. Our specimens are in 

 fine fruit. 



Suh-Class III. — Chlorosperme^ or green Alg^. 



Order IV. — Ulvace^. 



Porphyra vulgaris, Ag. P. 53. Very abundant on the rocks of 

 both shores. P. laciniata is nothing more than a cleft 

 variety of this plant, both are used in England in the 

 preparation of Marine Sauce, or laver. 



