40 DH. DICKIE OK AKCTIC SPECIES OF ALGiE. 



C. torhtosa^ Kiitz. Shores of Kikcrton Islaucls. 



OsCILLATORIACEiE. 



Calothricc ^iJosa^ Harv. Shores of Kikerton Islands. 

 Oscilhdoria ? Fragments too inipcrfcct for recognition ; 



Fresh Avater. 



jSToSTOCniNEiE. 



Nostoc arctictm^ Ecrk. Taricns parts of the shores of the gulf. 



It may te of interest to add here a list of other species oi Algce 

 '^hich have heen met "with at various times by different observers 

 beyond lat. G0°, — gleaned from various Avorks*. 



Fucus distichusy L. 



Fucus serrafusy L, 



Alaria Fylaii, Grev. This plant is abundant in various parts 

 of the Arctic sea, and attains a large size. In some specimens 

 which I possess, the fruiting leaflets scarcely differ in form from 

 those oi Alaria escxilenta of our OAvn coasts. 



Laminaria digit at a ^ Lam. 



Asperococctis ecJiinafns, Grev. 



HTyrionema sirangitlanSy Grev. I possess specimens of Chaio- 

 fnorplia melagonium covered Avith a minute parasite, agreeing iii 

 structure with the genus Myrioneina^ and, so far as I can judge, 

 identical with the British plant. 



Elacliista Jlaccida^ Aresch. Parasitical on Desmarestia aculeate^ 

 differs slightly from the British species in length of joints. 



Fctocarpv.s Diirlceei^ Harv. ? The specimens dredged in Davis 

 Strait are fragmentary, I therefore mark the species as doubtful ; 

 on some the fruit agrees with the figure in ' Nereis Borcali- 

 Americana.' 



Fliodomela Lyco][)odioid€Sy Ag. 

 S, gracilis^ Iviitz. 



Folysi^lionia nrccolatay Grev. 



Coi^aUina officinalis^ Lam. 



* Harvey, ^KereisEorcali-Anii 



AlgamDi 



