■ •.; '. rRACA. I\ 



•A . Bo fath. hundreds ol specirti 

 I. .it : ■ ■ . \\" . i i i i ;-' fath i spei imen. 



\ Lo ;4 w i , o i iili i specimen. 



\Y i.e. ecured specimens a1 the north-wes1 side ol Iceland in 0nundar Fjord, 



Im \ C Johansen I it in two places al Iceland, viz, at the south-east coasl in lyoons 



isl at Vestman Islands, 68 70 fath. 

 bution. Found in the eastern pari ol Kattegat and the northern pari oi the Sound, r.2 to 

 Meinert, 11 J. Hansen, W. Bjorck) ; the "Thor' captured it two times in Skagei Rak, too and 1 , ; 

 ptured in several places from Christiania Fjord to Vadso "in depths below 60 fathoms" 

 The "Thor" gathered it in the middle western pari ol the North Sea a1 I. .it. 56 ; ; N , Long 

 45 fath., .mil Tli Scotl records it from the western side ol Scotland in the Firth ol Clydi 



VII. The Order Nebaliacea. 



this very small but extremely interesting ordei .1 single species has been known from Greenland 

 "'i The "Ingolf" captured another species described from Norway. More than these 2 species cannot 

 spected to live in our area. 



The four main-papers both on genera and species and on morphological structure, etc. have been 



published l>y Claus in r.888, by G. O. Sars in C887 and [896, and bj Joh. Thiele in 1904. A paper by Joh. 



Thiele: "Beobachtungen iiber die Phylogenie der Crustaceenbeine" [1905), may be named, because it deals 



ome length with the appendages in Nebaliacea, but its ideas have never been and will scarcely evei bi 



bj Zoologists with real knowledge ol Crustacea. - In 1904 \V. T. Caiman published a valuable 



er on the classification of the Malacostraca, and in liis excellent hand-book (1909) the Zoologist will find a 



1 view on the organization and position in the system of the series Leptostraca with the single recent 



order, the Nebaliacea. 



In the present paper the morphological structure of the appendages in this order is treated, as 1 



• itements published by Claus, Sars or Thiele; the general outline of an appendage and 



the old idea that in Crustacea the sympod (or protopod) of legs etc. typically consists ol two joints, or besides 



observations on musculature, have been the basis of their interpretations It may be added 



that the investigation is a section of earlier studies on the morphologj of the appendages, etc . ol Arthropoda 



i published in a not too remote future. 



The idea, on which the study is based, is that one ought to examine the chitinized pie< es in appen- 



ipoda) quite as a Zoologisl examines the ossified parts in legs oi Vertebrates, 



ble bones in heads ol Pisces and Reptiles foi comparison with the elements in 



biri Is And mouth-parts my point oi departure is that then loins are processes on the 



quently a chitinized piece on the free posterioi or lower side ol each lobe 

 .ilia, maxillipeds, must be connected with the chitinized outei part of the joint, to which 



