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Part III. — Fifteenth Annual Report 



ties as off Japan; off Matuka, Fiji Islands; south of Australia; off 

 Monte Video ; near Teneriffe ; and at 300 miles off the Chesapeake. 

 Moreover, it was taken at the surface and also at the depth of 2425 

 fathoms. Sergestes arcticus, Kroyer, which Spence Bate considers to be 

 identical with S. atlanticus, was obtained off the coast of Greenland. 

 The length of the ' Challenger ' specimens varied from 20 to 50 mm. ; 

 while, according to S. Smith, a specimen of Sergestes arcticus, obtained 

 off the east coast of the United States of America, measured 90 mm. in 

 length. 



Calanus finmarchicus (Gunner). — The distribution of this species is 

 also nearly world-wide, as the following other records will show : — Arctic 

 Ocean, North Atlantic, and European Seas (Brady) ; Mediterranean, 

 West Coast of South America, Hongkong (Giesbrecht) ; Australasia and 

 South Pacific (Brady) ; Sulu Sea (Dana). 



Eucalanus elongatus (Dana). — This is clearly Dana's species ; it agrees 

 perfectly with the description and figures of it in Dr Giesbrecht's mono- 

 graph on the Copepoda of the Gulf of Naples. This also is an apparently 

 widely-distributed species : Dana records it from the Sulu Sea, and T. 

 Street from north of the Celebes ; Dr Claus obtained it in the Mediter- 

 ranean, and Dr Giesbrecht notes its occurrence westward of Gibraltar ; 

 on the West Coast of South America, from Valparaiso northwards ; and 

 in the Pacific between lat. 3° S. and 14° N., westward to long. 132° W. 

 But, though the species is of wide distribution, its occurrence in the 

 Shetland-Faroe Channel is of interest, as there seems to be no previous 

 record of its being found so far north in the Atlantic (unless perhaps, 

 some of the North Atlantic records of Eucalanus attenuatus : Dana may, 

 owing to an oversight, really refer not to that species, but to Eucalanus 

 elongatus). Eucalanus elongatus does not yet appear to have been 

 recorded from the North Sea, at least within the British area. 



Eucalanus crassus, Giesbrecht. — Only a single specimen (a female) of 

 this species was obtained, and it was captured at ' Knight-Errant 

 Station No. 33.' Eucalanus crassus is a more robust species than either 

 Eu. elongatus or Eu. attenuatus. The abdomen has the same number of 

 segments as in that of the last-named species, but the genital segment is 

 considerably shorter, and is laterally more dilated and broadly rounded : 

 the second abdominal segment is very short. The occurrence of 

 Eucalanus crassus in the Shetland-Faroe Channel is somewhat interest- 

 ing, as bearing on the distribution of the species. Dr Giesbrecht records 

 the occurrence of the species off Rio de Janeiro and north-east thereof; 

 to the west of South America between lat. 14° and 26° S., and further 

 between long. 175° W. and 138° E., and lat. 19° to 20 N. Moreover, 

 while re-examining some specimens of Eucalanus from the Gulf of 

 Guinea, for the purpose of comparing them with that from the Shetland- 

 Faroe Channel, I found one of this species : this specimen was taken at 

 a depth of 50 fathoms, lat. 70° 54' N., long. 17° 25' W., and the tem- 

 perature of the water at the 50 fathoms was 56°*58 Fahr. The above is 

 all that I know as regards the a distribution of this Eucalanus. It is just 

 possible, however, that some of the records of Eucalanus attenuatus may, 

 as with Eu. elongatus, really refer to Eucalanus crassus. 



Paracalanus parvus (Claus). — This is a small and widely distributed 

 species, and readily distinguished by the structure of the fifth pair of 

 thoracic feet in S and 9 • The following is a brief summary of what is 



