. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ACTINIARIA 77. Fif;. D"). A Piiniphrlliiiclis siiiiwsn. 9 ChnHdrophrUiii coioiKifa. III. Contributions to the Anatomy, Genealogy, and Classification of the Actiniaria. The Actiniaria belong to the groups of animals the classifica- tion of which is based on their anatomy. Since R. Hertwig (1882, 1888) published his report on the Actiniaria of the Challenger expedition our knowledge of their organization has lieen consider- ably augmented. A short survey of the anatomy is to be found in
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ACTINIARIA 77. Fif;. D"). A Piiniphrlliiiclis siiiiwsn. 9 ChnHdrophrUiii coioiKifa. III. Contributions to the Anatomy, Genealogy, and Classification of the Actiniaria. The Actiniaria belong to the groups of animals the classifica- tion of which is based on their anatomy. Since R. Hertwig (1882, 1888) published his report on the Actiniaria of the Challenger expedition our knowledge of their organization has lieen consider- ably augmented. A short survey of the anatomy is to be found in the works of Pax (1914; and 1925)—the latter work is, however, unreliable in several points—and in those of Stephenson (1920-22 and 1928). Both authors have made an attempt to classify the Actiniaria, Stephenson has to a certain extent dealt with their genealogy. By his of the Actiniaria Stephenson (1920 p. 468) used a "'new" method on simple summation of anatomical characters. Such a method is ]>rincipally usable— I had already (in 1900) pointed out that we must take into account all anatomical characters in classification—proviiled that we give some characters a greater value than the others, i. e. we must make a balance not only between more important and other less impor- tant characters, but also between the important characters them- selves. This also seems to have been in Stephenson's mind (192(1 p. 470, and 1921 p. 508), when he speaks of the systematical place' of B(Aon'Toi(h's. The particulars on which Stephenson (1920 22) grounded his classification, are, in several jioints, o])en to criticism, for which reason I wrote some years later the following unpui)lisiieil survey of the anatomy and its use in (•jassiiication, a sur\'ey, however, completed here by the resnlls of later investigations. Since then I have in some points niddificd ni\' npinidii as to the use of certain anatomical details for classification, in .s
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
