Distribution of the LamitiariacecB. 363 



ever possesses a species of tlie genus Laminaria {£>. pallida, Grev.) 

 which is said by Areschoug' to be nearly as abundant as Ecklonia 

 hiiccinalis (L.), Hornem. 



The only two districts in the list now remaining to be discussed 

 are those of western Africa and western South America. 



The district of western Africa is very poor in species of kelp, only 

 three being reported from it. One of these, Saccorhiza hulbosa 

 (Huds.), DelaPyl. is reported from the shores of Guinea,^ and Eck- 

 lonia huccinalis (L.), Hornem. and Laininaria pallida, Grev. from 

 the Canary Islands. Macrocystis appears to be absent. 



In the district of western South America, which means really the 

 shores of Chili, are found 8 species, 5 of which are common both to 

 it and to Fuegia. The coast of Chili, then, has all the Fuegian 

 species and 3 besides. The most interesting species quoted from 

 Chili is the Laminaria hi^nantophylla, P.&R., one of the digitate 

 species, concerning which almost nothing, however, is known, ^ and 

 some doubt may be felt perhaps as to whether it really belongs to 

 the genus Laminaria or not. 



Above, we have glanced at some of the important features of dis- 

 tribution by districts and groups of districts, the next thing to con- 

 sider, is the general distribution by tribes and by subtribes. 



The Laminariem are northern species as a glance at the table will 

 show. Members of the group are found in all of the districts of 

 the Arctic, the northern Atlantic, and the northern Pacific Oceans. 

 Alaska is the richest district possessing 14 species, western Europe, 

 northern Europe, Baffin Bay, and New England have 10 apiece and 

 Spitzbergen has 8. This subtribe is one of the most widely distrib- 

 uted subtribes for 2 species occur on the western coast of Africa, 

 another at the Cape of Good Hope, while still another is reported 

 from the western coast of South America. But in spite of the 

 occurrence of these southern localities for Laminariese, the group, 

 as a whole is distinctively northern, and these southern forms are 

 to be regarded as waifs derived in some fashion from the main sub- 

 tribe which is circumpolar at the north. This subtribe too has 38 

 species referred to it, which is double the number referred to the 

 Alariece, the next largest subtribe. 



^ Phycese Novfe et Minus Cogiiite, etc., Acta Reg. Soc. Upsal, ser. 3, vol. vi, p. 361, 

 1866. 2 Qf J Q._ Agardh, Spec. Alg., vol. i, p. 138. 



' Cf. Postels & Rupr., 111. Alg., p. 2, also J. Ag., Spec. Alg., vol. i, p. 136, Le Jolis, 

 Nova Acta, vol. xxv, p. 590, 1856. 



