﻿CRUvSTACKA MAI.ACOSTRACA. 



species of ]\Ialacostraca which occurs as a deep-water form witliin these parts of the Atlantic and at 

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

 inchided a number of species of Lithodinas, even two which are only known from San Francisco in 

 California. It is thus unfortunate for him that no species of the <^ronp Lithodinae is arctic, not even 

 Lithodcs Jiioja. which is not littoral, nor so far as I know found anywhere in negative bottom- 

 temperatures. It is a typicalh- boreal species which extends into the Murnian vSea and has been 

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

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

 kalen Verbreitung der arktischen Decapoden" (p. 359) in which there should onh- be "die sicheren und 

 im arktischen Gebiet nachgewiesenen Arten" contains for example several t\-pical 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 mir leider nuzuganglich"; 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 Alalacostraca 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 an\- case they are still the principal works on all 

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

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

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

 Sclfrocraiigoii salcbrosus. He has also been unfortunate howe\er with a fourth of my papers. He has, 

 namel)-, two species of S'crgcstcs and refers in the synonymy list under .V. Meycri Metzg. to my work 

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

 page, he has obviously not seen my paper, and I must supjDose 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'. arcticiis Kr. Again, in 1858 INI. Sars wrote 

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

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

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

 Krebsdyr", Videnskabsselsk. Forhandl. for 1S58) 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 \'ollstandigkeit er- 

 reichen konnte, wo\on 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 

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

 jn-obability 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 Sabiiicu scpfoiiniriiiatii Sal), and .S'. Sarsii Smith (p. 328), on llippolytt' spiiius Sow., //. Pliippsii Kr. 



Tlu- InKolllCxp.-clUiiMi. III. 2. • 



