AUTHOEITIES 



1. General Marine Biology. 



Works dealing with this subject are very numerous but we 

 may mention the volumes of the Cambridge Natural History 

 which treat of marine groups of animals. Oltman's Morphologic 

 und Biologic der Algen, Vols. I and II, Jena. 1904-5, gives a very 

 good account of the Algae. Cunningham's Marketable Marine 

 Fishes (Macmillan) is a good account of the habits and life-history 

 of the commoner fishes. Hickson's Fauna of the Deep Sea (Kegan 

 Paul, 1894) ; and Hjort's account of the recent voyage of the 

 * Michael Sars,' in Nature, Vol. LXXXV, 1910-11, deal with abyssal 

 animals. Part of Chapter IV of the volume on Deep-Sea Deposits 

 in the 'Challenger' Reports, and from page 1431 in the General 

 Summary, 2nd part, should also be read. 



2. Plankton. 



The series, Nordisches Plankton, Kiel and Leipzig, now being 

 published is a very complete account of the organisms occurring in 

 northern seas. Steuer's Planktonkunde (Leipzig, 1910) is a general 

 treatise on all questions connected with plankton studies. Schiitt's 

 Analytische Plank ton-Studien (Kiel and Leipzig, 1892) deals 

 with oceanic plankton, but Victor Henson has just published a 

 summary of the results of the German Plankton Expedition. The 

 most recent and exhaustive account of methods is that given by 

 Lohmann in the Kiel Kommission's Wissenschaftliche Meeres- 

 untersuchungen, Vols. 7 (1903) and 9 (1908). Detailed tables giving 

 the actual numbers of plankton organisms estimated as being 



