CRUSTACEA MALACOSTRACA. 



species of Malacostraca which occurs as a deep-water form within these parts of the Atlantic and at 

 the same time in "das Flachwasser der kalten Zonen". Using the statement cited as basis Doflein has 

 included a number of species of Lithodinse, even two which are onlj' known from San Francisco in 

 California. It is thus unforttinate for him that no species of the group Lithodinse is arctic, not even 

 Lithodes Diaja, which is not littoral, nor so far as I know found anywhere in negative bottom- 

 temperatures. It is a typically boreal s^Decies which extends into the Murman Sea and has been 

 taken west of Bear Island, in nearly loo fm. and at West Spitzbergen. This being the case, Doflein's 

 long list of Lithodinse can only serve to confuse the view. His "Uebersicht der horizontalen und verti- 

 kalen Verbreitung der arktischen Decapod en" (p. 359) in which there should only be "die sicheren imd 

 im arktischen Gebiet nachgewiesenen Arten" contains for example several typical Atlantic forms, 

 which are neither arctic nor taken in arctic waters, as will be shown later in dealing with the sep- 

 arate species. 



We read on p. 360: "Die Schriften von Hansen waren niir leider unzuganglich"; at the same 

 place however he gives the titles of the two largest of my (3) papers, which are of special importance 

 here, namely, the paper in the "Djimphna" Expedition and that on the Malacostraca of West Green- 

 land. These two papers are however sometimes found to be on sale in German second-hand book- 

 sellers' shops (according to their catalogues) and in any case they are still the principal works on all 

 the Malacostraca from the waters along West Greenland (60° — 73" N. L.) and the Kara Sea, which two 

 seas ought to have had some interest for the author. Had he obtained these papers he would have 

 been able to escape for example so jjatent an error as is contained in almost all his statements on 

 Sclcrocrangon salebrosus. He has also been unfortunate however with a fourth of my papers. He has, 

 namel}-, two species of Sergestcs and refers in the synonym}- list under S. Meyeri Metzg. to m}' work 

 in the Proc. Zool. Soc. 1896, but as he does not mention what I have stated about S. Meyeri nor the 

 page, he has obviousl}' not seen my paper, and I must suppose that the Proceedings Zoolog. Society 

 of London have also not been available to him. His lack of knowledge of my paper has however 

 brought misfortune to him, as I show in it that the two species he constanth- gives as distinct are 

 identical and should have the name of the second, S. arcticus Kr. Again, in 1858 M. Sars wrote 

 concerning StciiorJiynchus rostratus L. that "in the north it does not reach to Greenland", and con- 

 cerning Carcinus mcFims that it "is lacking at Greenland". Under both species Doflein (p. 351 and 355) 

 cites this very work of M. Sars ("Oversigt over de i den norsk-arctiske Region forekomniende 

 Krebsdyr", Videnskabsselsk. Forhandl. for 1858) as the source for the statement that they were taken 

 at Greenland. One might here indeed blame M. Sars for causing a future eager compilator in his 

 haste to read wrongly, because the word "Greenland" was named under these species. Dr. Doflein says 

 in his "Einleitung" concerning the literature: "Wenn ich trotzdem keine absolute Vollstandigkeit er- 

 reichen koiinte, wovon ich iiberzeugt bin — — — ", this his conviction has been in great degree cor- 

 rect — but one is then tempted to wonder whether, when such an extremely voluminous work of 

 compilation is found in place after place to be uncritical, inaccurate or defective, there is not a great 

 probability of its doing more harm than good. In the following pages it will be necessary for me to 

 show various other inaccuracies in Doflein's work so as to contribute to their eradication. His remarks 

 on Sabinea scptevicarinata Sab. and S. Sarsii Smith (p. 328), on Hippolyte spimis Sow., H. Phippsii Kr. 



The Ingolf-Expedition. III. 2. 2 



