120 KJELLMAN, THE ALGiE OF THE ARCTIC SEA. 



Geogr. Distrib. This species belongs to both regions of Polar Sea, the At- 

 lantic as well as the arctic, but in the latter it has only a limited distribution. It 

 goes far northwards in Baffin Bay, where it is said to be found at Lat. N. 73° 20'. 

 It reaches its maximum of frequency in the Norwegian Polar Sea. The most com- 

 mon form is f. typica; f. roseola is known to me only from the southern part of the 

 Norwegian Polar Sea. 



Localities: The Norwegian Polar Sea: at Nordlanden common and abundant, at 

 Finmarken common and abundant on open shores, at Maaso, Gjesvser and Oxfjord, at 

 Talvik and in Magero sound. 



The Murman Sea: on the coast of Russian Lapland and of Cisuralian Samoyede-land. 



The White Sea: scarce (?). 



Ba,ffin Bay: probably pretty plentiful on the Avest coast of Greenland, as at 

 Julianeshaab, Ameralik, Godthaab and at Lat. N. 73° 20', Long. W. 57° 20', Egedes- 

 minde (?). 



Polysiphonia Brodiaii (Di^lw.) Grev. 



in Hook. Brit. Fl. 2, p. 328; Conferva Brodisei Dillw. Brit. Conf. t. 107. 



f. Kutzingii nob. 



f. parvula, circa 6 cm. alta, cEespitosa, densa. 

 Fig. Polysiphonia Brodisei Kiitz. Tab. Phyc. 14, t. 1. 



f. Agardhii nob. 



Descr. Hutchinsia Brodi.ei a Ag. Spec. Alg. 2, p. 63. 



Exsicc. Polysiphonia penicillata Aresch. Alg. Scand. exsicc. N:o 64. 



f. Lyngbyei nob. 

 Descr. Hutchinsia Brodisei Lyngb. Hydr. Dan. p. 109. 

 Fig. » » » » » t. 33. 



«. laxa nob. 



forma sequente robustior, penicillis ramulorum paucioribus, permagnis, distaiitibus. 



[i. confluens nob. 



forma penicillis ramulorum creberrimis, apicem axis primarii versus valde approximatis, confluentibus. 

 Syn. Polysiphonia Brodisei Kleen, Nordl. Alg. p. 13. 



Remarh on the definition on the form. In Kleen's collections, that are rich in 

 specimens of this species from the Norwegian Polar Sea, there are to be found three 

 distinctly marked forms, besides several intermediate ones. Unfortunately this algologist 

 has given no information as to their occurrence and habitat. The form denominated 

 by rae f. Kutzingii, much resembles in habit a low Rhodomela lycopodioides f. laxa. It 

 agrees in ramification with the plant figured 1. c. by Kutzing under the name of P. 

 Brodicei, with which however the diagnosis given by him in Spec. Alg. of an homony- 

 mous alga accords but little. In the last-quoted passage he means apparently the same 

 form that Agardh describes in Spec. Alg. under the name of Hutchinsia 'penicillata. 



