312 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 8. 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. 182° W. 
But, though the species is of wide distribution, its occurrence in the 
Shetland-Farde 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 Hucalanus attenuatus : Dana may, 
owing to an oversight, really refer not to that species, but to Hucalanus 
elongatus). Hucalan: + 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.’ Hucalanus crassus is a more robust species than either 
Ku. 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 
Hucalanus crassus in the Shetland-Farde 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 Hucalanus 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 distribution of this Huwcalanus. It is just 
possible, however, that some of the records of Hucalanus attenuatus may, 
as with Hu. elongatus, really refer to Hucalanus 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 ¢ and@?. The following is a brief summary of what is 
