1 



242 J)E. DICKIE OlS" AJaCTIC SPECIES OE ALG_5:. 



Scytonema myochrous^ Ag, 

 Sorospora montanaj Harv. 



Ilcematococcus friisfulosus, Harv. 

 Tyndaridea anomdla^ Harv. 



SIJMMAET. 



Yi^oiv^iSAXig fre^liwater specie?, of marine forms there Lave been 

 found bevond G0° N. lat., along the shores of Davis Straits and 



Baffin's Bay and their branches, the following : 



Species 



Melanospermece 25 



UTiodospermecB ,' 22 



Chlorospermecd 10 



63 



The Paniilies represented arc the following : — Pucacea>, Spo- 

 rochnacea), Laminariacea?, Dictyotaceae, Chordariacese, Ectocar- 

 pacea), Ehodomelaceae, Corallinacea?, Sphserococcoidese, Ehodyme- 

 niacese, Cryptonemiacese/ Ceramiacese, Ulvacese, Coufervaceae. 



Collections in this department have been few ; and as numerous 

 localities remain to be explored, other species will doubtless be 

 added. 



Some of them occur in the greatest profusion ; masses consisting 

 chiefly of Fucits vesiculosus, Desmarestia acideata^ Lixminaria Ion- 

 gicrurisy and Alaria are found floating in summer, set free doubt- 

 less by the action of icebergs. If to the higher forms we add the 

 vast multitudes of marine DiatomacecB which abound everywhere 

 in the Arctic waters and upon ice-floes, it is obvious that even m 

 very high latitudes there is abundance of material for the support 

 of animal life*. 



Not a few of the species occur also on the west coast of Ame- 

 rica, as shown by Professor Harvey's remarks on Dr. Lyall's col- 

 lection in a recent volume of Linnean Proceedings, A compar- 

 ison between the two marine fl.oras as a whole is unnecessary, 

 since Dr. Lyall's collections were made chiefly in much lower 

 latitudes than the portion of the Atlantic to which the present 

 communication refers. 



ahmentary 



* • 



I 



found abundance 



txanuna 



/ 



I 



find 



