590 THE PUR SEALS OP THE PEIBILOP ISLANDS. 



The collections accessible to the writer have been those made by Messrs. Greeley 

 and Snodgrass, under the direction of President Jordan, which consist of three jars 

 of seaweeds preserved in formalin. Besides these, there were accessible to the writer 

 for examination two other small collections, viz, a few species obtained lor the late 

 Prof. D. O. Eaton thcough the courtesy of the Alaska Commercial Company about 

 1877, which I have been able to reexamine through the kindness of Dr. A. W. Evans 

 of Yale University, and a collection by Charles H. Townsend, of the United States 

 Fish Commission steamer Albatross, in 1895, made at the request of the writer and at 

 the direction of the United States Commissioner of Fisheries. The Albatross collection 

 has been made available for this account through the permission of Commissioaer 

 Bowers. 



The present enumeration, then, includes all that Can be determined from these 

 three collections, as well as information concerning any additional species credited to 

 the islands but not represented in the collections. In this way the writer has hoped 

 to bring together all that is reliably known about the marine flora of this group of 

 islands, for it has been suspected that the shores of Bering Sea are destitute of algae 

 altogether (cf. Euprecht, 1851, p. 203, and Merrifleld, 1875, p. 56), i. e., north of the 

 Aleutian Islands, with which, however, Euprecht reckons the Pribilofs, Dall (1875) 

 and Kjellman (1889) oppose this view, and Konyam or Penkegnei Bay, St. Lawrence 

 Bay, and Port Clarence have floras very similar to that of the Okhotsk and the Aleu- 

 tians. St. Paul, likewise, has a very similar flora, as may be seen from the annexed 

 list. 



CYANOPHYCEAE. 



No specimens of blue-green algae have been found in the collections, either free or 

 attached to the others. No members of this group are mentioned either by Euprecht 

 (1852) or by Kjellman (1889). 



CHLOROPHYCEAE. 

 PrasiolacriBpa (Lightf.) Ag. * ' 



This species is commonly found covering recently vacated or little-used portions 

 of the seal rookeries, according to the note attached to a specimen collected at the 

 Eeef rookery on St. Paul Island by B. W. Evermann July 20, 1892, and sent from the 

 United States National Herbarium to the writer. 



Chaetomorpha melagonium var. typica Kjellm. Kjellman, Berkigshafvets Algflora; 55, 1889.' 



Only a few fragments of a Chaetomorpha exist in the collections, but both in those 

 of the Albatross and of Greeley and Snodgrass. They seem to belong to this species. 

 (St. Lawrence Island and Port Clarence.)^ 



Cladophora mertensii (Knpr.) De-toni. ? 



Conferva mertensii Rupr. , Tange Ooh. ; 403, 1851. 



There is only one Cladophora present in the collections of Greeley and Snodgrass, 

 and that, a single specimen too imperfect to determine at all satisfactorily. It was 

 submitted to Professor Parlow, of Harvard University, who replies that it agrees best 

 with this species, but is by no means certainly to be referred to it. 



' Only literature to localities in Bering Sea proper is quoted. 



^ The localities inclosed in parentheses show additional distribution within Bering Sea proper. 



