4i0 iifiviEW. 



maxime essentialibus dissentiant, patet ut crediderlm totam 

 rem novis et iteratis observationibus antea esse confirmandam, 

 quam ipsis organis descripsis quandam vim systematicam 

 attribuamus." 



Having thus referred to the principal points noticed in the 

 preface, it remains to say a few words respecting the work 

 to which it forms the introduction. The volume, which con- 

 sists of upwards of 700 pages 8vo, contains descriptions of 

 all the orders and genera of the Floridese (with the exception 

 of the Corallines and the RJiodomelece) and of all the new 

 species comprised therein. The species which were correctly 

 described in the preceding parts of Volume II have not been 

 repeated, but are merely referred to. Where new characters 

 were perceived and more precise definitions Avere necessary, 

 they will be found in the present volume. It will be seen, 

 therefore, that tlie work is strictly supplementary. 



The arrangement, although based on the system of classi- 

 fication followed in the former work, is almost entirely new. 

 There are twenty-two orders, arranged under six series and 

 173 genera; namely, 169 in the body of the work and 4 

 in the addenda. The list of new species is very extensive, 

 large collections of Algee having been made from the coastsof 

 all the Australian colonies. New Zealand, and the Pacific 

 coasts of America. Of late years the Swedish expeditions 

 have brought home large collections of Algse in excellent 

 preservation; among these may be specially noticed those of 

 Dr. Berggren in the Arctic seas, on the coasts of New Zea- 

 land, and on the Pacific shores of America. One cannot 

 help contrasting these rich harvests of Algse with the meagre 

 lists furnished by Dr. Dickie, and published in the ' Journal 

 of the Linnean Society,' of the Alga? collected by " the Chal- 

 lenger expedition " during its three years' cruise. The work 

 just published by Mr. Moseley ' On True Corals ' proves that 

 zoological investigations are more to his taste than collect- 

 ing and preserving Algse. 



With regard to the Melanosperms, of which the first 

 volume of ' Species Algarum ' treats, it may be mentioned 

 that Professor Agardh has recently published a treatise on 

 the Lamixarie-^ and Fucace^ of Greenland,^ and has re- 

 vised and rearranged the genera Cystophora and Zonaria, 

 and so much of the genus Sargassl'm as includes the tribes 

 Pterocaulon, Phijllotricha, Schizophylla, and Heterophjlla — 

 so far as they relate to Australian species — several new species 

 being added. With the latter is published a monograph of 



1 "Bidrag till Kanuedomen af Groulands Lamiuarieer och Fucaceer," 'K, 

 Vet. Akad.,' Sept. 27, 1871, Stockholm. 



