36 List of the St. Lawrence Algce, 



Ner. Bor.-Am. ; but it exactly corresponds with tlie 

 description in the Manual, and does not very much 

 resemble A. echinatus. After careful consideration, we 

 are disposed to add it to the American species. 



Order V. — CnORDARIACEiE. 



Chordaria JlageUiformis, Ag. P. 123. In rock pools mid- 

 tide, Murray Bay. This is a remarkably prolific and 

 robust specimen. Its branches are from 6 to 8 inches 

 long. 



Chordaria divarlcata, Ag. P. 124, pi. XI A. In rock pools 

 mid-tide, Murray Bay. This is also a remarkably fine 

 specimen. It has shrunk greatly in drying. 



Elachista fiicicola, Fries. P. 131, pi. XI B. Parasitic on 

 Fuci and Chordarias. Metis, 



Order VI. — Ectocarpace^. 



Ectocarpus hracJiiatiis, Harv. P. 138. Parasitic on Fucus 

 vesicidosus. Murray Bay. Also in the collection of 

 Mr. D. A. Poe from Metis. 



Ectocarpus littoralis, Lyngb., p. 139. Abundant on Fucus 

 vesiculosus. Murray Bay and St. Nicholas. 



Ectocarpus siUculosus, Lyngb. P. 139. On stones and other 

 Algae at low water mark. Murray Bay ; very abundant 

 and the specimens are very fine. 



Ectocarpus fasciculatus, Harv. P. 141. Parasitic on Chor- 

 daria. We are doubtful about this species. The speci- 

 men is so infested with Diatomaceae, that it is very diffi- 

 cult to discover the fructification ; but so far as it is 

 discoverable, it has all the appearance of this species. 



Sub-Class. — II. RnoDOSPERMEiE OR Red Alg^. 

 Order I. — Rhodomelace^. 



Odonthalia dentata Lyngb. P. 14. In great abundance at 

 Bernaby Island, Rimouski, and frequently found at 

 Murray Bay. 



Odonthalia angustifoUa, Suhr. P. 14. Abundant at Mur- 

 ray Bay. This is a very beautiful plant. It is not 

 described in the Ner. Bor.-Am. Harvey only says of it 



