Hansen, H: Danish Ingolf-Expedition, Vol. 3

Excerpt from The Danish Ingolf-Expedition, Vol. 3: Part 3; Crustacea Malacostraca, II

Since 1881 about twenty-four zoologists have published descriptions of new species, sometimes besides of new genera, of Tanaidacea. Among these prominence must be given to the two English zoologists A. M. Norman and T. R. R. Stebbing, because in a valuable paper (on Crustacea Isopoda. 1886) quoted several times in this report they gave good descriptions with numerous figures of 17 species (1 valid new genus), 13 of which were new and the majority even deep-sea forms; in other papers each of these two authors has described and figured some other forms. In the Challenger Report Vol. XVII (1886) F. E. Beddard established 4 new genera and 10 new species, most of them interesting antarctic or deep-sea forms; unfortunately his figures are somewhat poor. A. Dollfus has published preliminary descriptions, with some figures, of about 14 valid new species and 1 new and valid genus; in several papers published in later years Miss Harriet Richardson has established 2 new genera and several new species, mostly American.

In order to arrive at a fair idea of our knowledge of genera and species established before the middle of 1912 I have inspected the Zoological Records since 1877 and besides looked over the vast majority of the papers. I have attempted to count the genera and species hitherto established excluding of course the synonyms, but it was impossible to arrive at absolute certainty as to the number of species because in a few cases it cannot be made out whether a species is valid or ought to be cancelled as a synonym, and some few species have been so poorly described that they can scarcely be recognized with any certainty. But I am sure that the following numbers are nearly correct.'

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