424 MB. G. S. BKADY ON 



Two of the species described in Baird's " British Entomos- 

 traca," it seems impossible to identify — Canthocamptus Stromii 

 and C. minuticornis. The former name probably applies to some 

 member of the genus Thalestris, the latter perhaps to a Laophonte. 

 Neither species is included in the following list. 



Fam. CALAmVM, Dana. 



Sub-Fam. C ALANINE, Dana. 



Genus CALANUS, Leach. 



(CETOCHILUS, R. de Vauztme, fide Boeclc). 



1. Calanus finmakchicus, [Gunner.) 



Monoculus finmarchicus, Gunner, Act. Hafn. (1765), X., 175, 

 f. 20-23. 



Cetochilus septentrionalis, Goodsir, Edin. New Phil. Journ., 

 XXXV., 339, PL VI., figs. 1-11. Baird, Nat. Hist. Brit. 

 Entom. (1850), p. 335, T. XXX., figs. la-g. 



Cetochilus helgolandicus, Claus, Die frei leb. Copep. (1863), 

 p. 171, T. XXVI., figs. 2-9. 



According to M. Boeck the species described first by Gunner 

 as Monoculus finmarchicus is identical with the Cetochilus helgo- 

 landicus of Claus, and not at all with the species called by Baird 

 Temora finmarchica. Leach's genus Calanus was, however, con- 

 stituted to receive Gunner's species, and is synomymous with 

 the more recent name Cetochilus, applied by Roussel de Vauzeme 

 to the same animal. Not having the opportunity of reference to 

 the original memoirs of Gunner and Leach, I must accept as 

 substantially correct M. Boeck's careful account of this syno- 

 nymy. The generic name Cetochilus will therefore give way 

 to Calanus. 



The present species, C. finmarchicus, is generally distributed 

 all around our coast, being met with in equal abundance both 

 between tide marks and in the open sea. It is said to constitute 

 an important part of the food of the whale. 



