470 PROCEEDINGS OP THE AMERICAN ACADEMY 



Dr. Kumllen were determiaed by me provisionally, and a rough list 

 was printed iu the Bulletin of the National Museum, No. 15 (Wash- 

 ington, 1879) ; but, not supposing that my list was to be published, the 

 specific names were given without naming the authorities. In the 

 following account, I have included a revision of the alga3 collected by 

 Dr. Kumlien, which were mostly found at localities comparatively 

 near Ungava Bay. As they are of interest in studying the distribu- 

 tion, I have added occasional notes of some of the forms received 

 from the coast of Alaska, collected by Mr. John Murdoch, the botanist 

 of the expedition to Point Barrow, under Lieutenant Ray, and of 

 some species from St. Paul's Island near Behring's Straits, for which 

 I am indebted to Prof. D. C. Eaton. 



FLORIDEiE. 



Odonthalia dentata, Lyngb. 



Ungava Bay (Turner). A large number of specimens were col- 

 lected, all of the broad form common on the northern shores of 

 Europe. The narrow form of this species which, were it not for 

 intermediary forms, might almost be considered a distinct species, is 

 apparently more common in the Gulf of St. Lawrence than the type. 

 The typical form was collected at Point Barrow, and was also found 

 as far south as Victoria, British Columbia, by Mr. G. W. Lichten- 

 thaler, one of whose specimens was unusually broad, being almost 

 flabellate in shape. On the eastern coast this species is unknown 

 south of Halifax, N. S. 



POLTSIPHONIA ARCTICA, J. G. Agardh. 



Ungava Bay (Turner). Annanactu Harbor, Gulf of Cumberland 

 (Kumlien). A considerable number of specimens were collected, and, 

 in all those examined, a section of the larger branches showed seven 

 cells surrounding a central cell. The specimens from Annanactu 

 Harbor grew on kelp at a depth of seven fathoms. 



Rhodomela ltcopodioides, J. G. Ag.,var. tenuissima, Kjellman. 



Ungava Bay (Turner). Penny Harbor (Kumlien). 



The typical form of this species as figured in the Phycologia 

 Britannica, and represented in Areschoug's Alga3 Scandinavicas Ex- 

 siccatae, No. 3, is unknown to me on the American coast. Several 

 specimens, which agree closely with a specimen of Ruprecht's Fusra- 

 ria tenuissima^ which is considered by Kjellman a variety of R. hjco- 

 jjodioides^ were collected both by Turner and Kumlien. A coarser 



