450 Part III. — Twentieth Annual Report 



CRUSTACEA. 

 Sub-Class ENTOMOSTRACA. 

 Order I.— COPEPODA. 

 Calanid^:. 



Galanus hyperboreus, Kroyer. 



1838. Calanus hyperboreus, Kr., Danske Selsk. Afh., vol. 7 

 p. 310, t. 4. 



A few specimens were obtained in a gathering collected about 22 miles 

 to the north of Shetland on May 17th, 1901. One or two specimens 

 were also found in another gathering collected to the east of the 

 Shetland Islands on the 22nd of the same month, and as both these 

 localities are within the British area, this northern Calanus is entitled 

 to be regarded as a member of the copepod fauna of the British Islands. 

 This appears to be the only Calanus in the North Atlantic or Arctic seas 

 in which the last segment of the thorax has the postero-lateral margins 

 distinctly angular. The size of specimens appears to vary a good deal, 

 but one or two of the largest of those now recorded measured one-fifth 

 of an inch (5 mm.) in length. 



JRliincdlanus (?) gig as, Brady. 



I have again to record this copepod from the Moray Firth. It does 

 not appear to differ much except in size from the form described by 

 Dr. Brady under the name given above. 



Pseudocalanus elongatus, Boeck. 



I include this common species in these notes in order to mention the 

 occurrence of a form somewhat smaller than the ordinary one. These two 

 forms have been observed in the Firth of Forth and in the Moray 

 Firth as well as off the Aberdeenshire coast. They were first noticed a 

 good many years ago, and they are still occasionally noticed. Though 

 the two forms have been carefully examined no important difference has 

 been observed between them. 



Stephus minor ,*T. Scott. 



1892. Stephus minor, T. Scott, 10th Ann. Rept. Fishery Board 

 for Scot., pt. iii., p. 245, pi. vii., figs. 1, 2, 10-13. 



This species occurred in a bottom gathering from Smith Bank, Moray 

 Firth, collected on February 15th, 1901, at a depth of about 24 fathoms. 

 Stephus minor, though apparently widely distributed, seems to be a rare 

 species, as seldom more than one or two specimens are obtained in any 

 single gathering. 



Stephus seotti, G. O. Sars. 



1896. Stephus gyrans, T. Scott (not Giesbrecht), 15th Ann. 

 Rept. of the Fishery Board for Scot., pt. iii., p. 146, pi. ii., 

 fig. 9, pi. iii., figs. 17, 18. 



Recently, when re-examining some copepoda collected in the Firth of 

 Forth in 1892, I obtained a single female specimen of this species. 



