64 



THE VOYAGE OF H.M.S. CHALLENGER. 



minimum areas of distribution, because all doubtful indications have been removed 

 from it) : — 



With respect to the species of Gymnosomata, the following list shows how they are 

 distributed in the different provinces. 



C. The Species of Gymnosomata arranged in Provinces. 



I. Arctic Province. 



Clione limacina. 



II. North Atlantic Province. 



Dexiobranchsea paucidens. 

 * 4 Dexiobranchsea ciliata. 



Pneumonoderma mediterraneum, also V. 

 # Pneumonoderma violaceum. 



Clionopsis krohni. 



Clionopsis grandis, also V. 



Notobranchsea macdonaldi. 



Clione longicaudata. 



Clione Jlavescens. 



III. South- West African Province. 



Pneumonoderma peroni, also IV. and V. 



1 Clio capensis, Rang. 



2 The "trigonal tailed Clio" of Macdonald ; see pp. 41, 43. 



3 The " Clio caudata" of Macdonald. 



4 Species marked with an asterisk have been collected in the province by the Challenger Expedition. 



