List of tic St. Lawrence Algcc. 35 



Laminaria Fht/Uitis, Stack. Harvey's Manual. P. 31. On 

 rocks near low water. This plant is not found in the 

 Ner. Bor.-Am. Our specimen exactly corresponds with 

 the description of the Manual ; but Dr. Greville, Mrs. 

 Griffiths, and Dr. Harvey doubt whether this beautiful 

 plant may claim to rank as a species distinct from L. 

 saccharina. " The more lanceolate form, deHcate sub- 

 stance, and pale yellowish-green colour, constitute the 

 chief marks of distinction." 



Laminaria digitata, Lam. P. 94. Abundant as far south 

 as Cape Cod. 



Agarum Turneri, Post. & Rupr. P. 95, pi. V. On rocks below 

 low water mark, Rimouski, South Shore. This plant 

 is peculiar to the Atlantic and Pacific Shores of America. 

 Its common name is Sea-Colander. 



Chorda Jilum, Stack. P. 98. Murray Bay. A young speci- 

 men clothed with beautiful pellucid grass-green hairs — 

 common on the Northern Shores of America. 



Chorda lomentaria, Lyngb. P. 98. On rocks at mid-tide. 

 This plant is not easily distinguishable from Asperoco- 

 ccus echinatus. " In habit it has more resemblance to 

 it than to O. filum ; but the structure of the walls is 

 more in accordance with the latter, and it may always be 

 known by its constricted joints." 



Order IV. — DiCTYOTACEiE. 



Dictyosiphon fceniculaceus, Grev. P. 114. On rocks at low 

 water mark. "In a growing state every branch is 

 clothed with long slender pellucid-jointed hairs, which 

 give the plant, when seen under water, a beautiful 

 feathery character." — Harv. 



Punctaria tenuissima^ Grev. P. 115. Parasitic on other 



Algae. 

 Punctaria plantac/inea, Grev. P. 115. On rocks and stones. 



Asperococcus echinatus, Grev. P. 117. A plant nearly allied 



in appearance to C. lomentaria. 

 Asperococcus compressiis, Grifi". Harvey's Manual, p. 42. 



Murray Bay. This plant is not included in Harvey's 



