128 NOTES ON THE COPEPODA OF THE 



stations, and is very common in Mr. Gardiner's Maldive Collections, 

 thus appearing to thrive under widely differing conditions as to 

 temperature, etc. Its northward and eastern extension appears to be 

 as well defined as that of the previous species, as it is not mentioned 

 by Sars. 



J\h incalanus. The Rldncalanus cornutus, also included in the list 

 before mentioned, must be removed for the same reasons as E. atteni'i/fi'.s. 

 It never occurs in the Faroe Channel, and I have never yet found it in 

 the Atlantic north of 51°. lat. In Fowler's list (P.Z.S., June 21st, 1898) 

 it is recorded as frequent, especially in the Mesoplankton. In Fowler's 

 collection it was certainly absent, but Rhine, nasntus was common, and, 

 in fact, is scarcely ever absent from the Epi- or Meso- plankton of this 

 region, and it is evident that the two species have been confused. 

 B. cornvtns is distinctly a southern ocean form, and all records of its 

 occurrence beyond 30° N. must be looked upon with suspicion. Rhine, 

 nasutvs occurs often in great abundance in the Faroe Channel, and 

 frequently throughout the Atlantic traverse. I have found it in the 

 Maldive Collection, but very sparingly, and Scott mentions it among 

 the Ceylon Copepods. Like Euccdanus, its northern distribution is 

 apparently well defined, having occurred only at two stations of the 

 cruise of the Michael Sars, in deep water off the coast of Iceland, and 

 once in the North Sea between Scotland and Norway. 



Pleuromamma. PI. ahdominalis is not common in the Faroe Channel, 

 while PI. robusta (Dahl) occurs with great frequency. Consequently 

 the records of PL ahdominalis in Fowler's list {loc. cit.), and the figures 

 (5 per cent. Epiplankton and 58 per cent. Mesoplankton) in his 

 second paper (February 3rd, 1903) must be doubted. Pleur. rohusta 

 occurred abundantly in Fowler's collection, and in my own Faroe 

 collections it is the common Pleuromamma of the Faroe Channel 

 and North Atlantic (51° to 62° N.). Though PI. ahdominalis does occur 

 in the North Atlantic, it is comparatively rare in my collections. 



The distribution of this Copepod {PL rohista) is not unlike that of 

 Eucalanus and Rliinccdanns. Sars mentions the occurrence of a few 

 specimens " somewhat north of the Faroe Islands," and two specimens 

 only from Norway. It occurred throughout my Atlantic traverse in 

 1903, and for four years successively has been always abundant in the 

 Faroe Channel, but north and east of Shetland it appears to have a fairly 

 well defined limit, though apparently reaching, in small numbers, the 

 coast of Norway. PL ahdominalis was not common in the Atlantic 

 traverse. PL ahyssalis has occurred in my experience only once in the 

 Faroe Channel. 



Euehirella. Only two species of Euchirella occur in the Faroe 

 Channel, viz. E. r'ostrata and E. carinata. The former is of frequent 



