360 CRUSTACEA OV NORTHUMBERLAND AND DUEHAM 



2. Claus (Dr. C). Die frei lebenden Copepoden, mit 



besonderer Beriicksichtigung der Fauna Deutschlands, 

 der Nordsee und des Mittelmeeres, Leipzig, 1863. 



3. Brady (G. S.). A monograpli of the free and semi-parasitic 



Copepoda of the British Islands, 3 vols., London, Ray 

 Society, 1878-80. 



4. Brady (G. S.). A revision of the British species of fresh- 



water Cyclopidae and Calanidae. Nat. Hist. Trans. 

 Northumberland and Durham, vol. xi., 1891. 



5. Giesbrecht (Dr. Wilhelm). Systematik und Faunistik der 



pelagischen Copepoden des Golfes von Neapel und der 

 angrenzenden Meeres-Abschnitte, Berlin, 1892. 



6. Sars (G. O.). An Account of the Crustacea of Norway, 



vols, iv., v., Copepoda, 1904-9 (in course of publica- 

 tion). 



7. Norman (A. M.) and Scott (T.). The Crustacea of Devon 



and Cornwall, 1906. 

 Scott (T. and A.). Numerous papers chiefly in the 

 Annual Reports of the Fishery Board for Scotland. 



The classification here adopted for the Copepoda is based 

 chiefly on that used by Professor G. O. Sars in his work on 

 the "Crustacea of Norway" now in course of publication. 



Section L— CALANOIDA 

 Fam. I.— CALANID^ 



Calanus septentrionalis (H. Goodsir). 



1843. Cetochilus septentrionalis, Goodsir, Edinburgh New 



Philos. Journ., xxxv., p. 336, pi. vi., figs. i-ii. 

 1863. Cetochilus helgolandicus, Claus (2), p. 171, pi. xxvi., 



figs. 2-9. 

 1878. Calanus finmarchicus, Brady (3), vol. i., p. 38, pi. i., 



figs. 1-12. 

 1 90 1. Calanus helgolandicus, G. O. Sars (6), vol. iv., p. 11, 



pi. iv. 

 1906. Cetochilus septentrionalis, Norman and Scott (7), 



p. 126. 



