l.!6 NOTES ON THE COPEPODA OF THE 



Lucicutia species show a distribution similar to other warm-water 

 species, and may be regarded as wandering into the Fariie Channel by 

 accident. L. Jiavicornis is not often found there, but increases in 

 frequency further south of the Wyville-Thompson ridge. It has a very 

 extensive range, occurring with frequency al)0ut the Maldive Islands of 

 the Indian Ocean. 



Mctridia species. M. longa is clearly a distinctly northern form, 

 occurring with great frequency in the deep water of the Faroe Channel, 

 and at very low temperatures, and is traced down the North Atlantic, 

 where it occurs with much less frequency and in deep water. M. lucens, 

 on the contrary, is apparently very common in the warm area of the 

 Atlantic ; equally with the cold area of the Faroe Channel, at any rate 

 as far south as lat. 50' N., south of which, however, it appears only 

 doubtfully to reach. 



M. I^^ormcmi, which was described by Giesbrecht from the Faroe 

 Channel, has not occurred in any of my collections in that region for 

 the last four years, but was common in the North Atlantic during the 

 summer of 1903, especially between lat. 50° and 55° ; its presence in 

 the Faroe Channel at any time is therefore probably accidental. 



31. hrevicauda, of which several examples occurred off the Irish coast 

 in 1903, has hitherto been regarded entirely as a Pacific Ocean species 

 (Giesbrecht). M. longa, and especially M. lucens, may be regarded as 

 typical northern cold-area forms. 



Oncea species (especially 0. conifera) are rarely absent from any tow- 

 netting in the Faroe Channel or North Atlantic in deep water ; they 

 are very rarely, however, found at the surface. The genus is cosmo- 

 politan and has representatives in the Indian Ocean nearly as abundantly 

 as the northern seas. The same may be said of Oithona, especially 

 0. plumifcra and similis, and both Oncea conifera and Oithona similis 

 are recorded by Giesbrecht from the Antarctic Ocean {Voycuje clu S.Y. 

 Belgica, 1902). The same may be said of Microsctella atlantica, common 

 throughout the Faroe Channel, the North Atlantic, less common in the 

 Indian Ocean (Maldives, Wolfenden), Ceylon (Scott), and in the 

 Antarctic Ocean (Giesbrecht lac. cit.). Bradyidius armatus is similarly 

 cosmopolitan, frequent in the Faroe Channel, round the British Isles, 

 occurring also in the Mediterranean, and round the Maldive Islands of 

 the Indian Ocean. Acartia Clausii is similarly cosmopolitan, and along 

 with Oncea conifera, Oithona plumifera and similis, and Ectinosonia 

 {Microsctella) atlantica, indiirerent to depth and temperature. Scolccithriv 

 minor is also widely distributed, very common in the Fahie Channel, 

 but less common in the North Atlantic. 



Aniallophora magna occurred witli frequency in the warm Atlantic 

 area, especially about lat. 51° to 52° N., in the summer of 1903. Scott 



