og „Catalogue of British Echinoderms"; dog har jeg ikke 

 benyttet denne Forfatters Nomenclatur, men væsentlig 

 rettet mig efter Lyman: „Ophiuroidea and Astrophytidæ •' J ) 

 og «Report on the Ophiuroidea" 2 ). I Synonomilisterne er 

 som Regel kun de vigtigere Arbeider optagne, en udforligere 

 Fortegnelse vil man linde i- sidstnævnte Arbeide af 

 Jeffrey Bell samt i Ly mans Arbeider. I Ludwigs: „Die 

 Echinodermen des Mittelmeeres" 3 ) vil man ligeledes finde 

 meget udførlige Fortegnelser. Dette Arbeide indeholder 

 desuden en meget fuldstændig Literaturfortegnelse ved- 

 rørende de europæiske Echinodermer. 



Tilslut maa jeg bringe Herr Overlæge Dr. med. og 

 philos. D. C. Danielssen, efter hvis Opfordring jeg overtog 

 Bearbeidelsen af denne Dyregruppe, min bedste Tak for 

 de mange værdifulde Raad og Oplysninger, hvormed han 

 stadig stod til Tjeneste. Specielt maa jeg takke for den 

 Liberalitet, hvormed Herr Overlægen stillede de at ham 

 som Deltager i Nordhavsexpeditionen forte Dagbogsop- 

 tegnelser til min Disposition. 



Bergen, Marts 1893. 



James A. Grieg. 



') 111. Cat. Mus. Comp. Zool., vol. I, no 1. Cfr. „ Supplement 

 to the Ophiuridæ and Astrophytidæ" op. c. vol. II. no. li. 



2 ) Chall. Exp., Zool., vol. V, part 14. 



3 ) Mitth. Zool. Stat. Neapel, vol. I, pag. 523. 



and "Catalogue of British Echinoderms"; I have not, how- 

 ever, adopted that writer's nomenclature, but in that respect 

 have been chiefly guided by Lyman "Ophiuroidea and 

 Astrophytidæ'' '), and "Report on the Ophiuroidea"' 2 ). 

 Only the more important works are, as a rule, included in 

 the lists of synonyms: a more detailed list will be found 

 in the last-named work by Jeffrey Bell, as well as in 

 Lyman's works. In Ludwig's "Die Echinodermen des 

 Mittelmeeres" 3 ) there will also be found very complete lists. 

 That work contains, besides, a very complete list of liter- 

 ature concerning the European echinoderms. 



Finally, I would take this opportunity of conveying 

 my warmest thanks to Herr D. C. Danielssen, Dr. Med. et 

 Phil. — at whose request I undertook the investigation of 

 this animal-group for the great amount of valuable 



advice and information wbich he has constantly placed at 

 my disposal. I would especially thank him for the liberality 

 with which he placed at my disposal the notes made by 

 him, in his journal, as a member of the North Atlantic 

 Expedition. 



Bergen. March 1893. 



James A. Grieg. 



') 111. Cat. Mus. Comp. Zool, vol. 1, No. 

 to the Ophiuridæ and Astrophytidæ" op 

 -) Chall. Exp. Zool. vol. V, part. 14. 

 s ) Mitth. Zool. Stat. Neapel, vol. I, page 523. 



1 cmp. ''Supplement 

 c. vol. II, No. 6. 



