2 Mr. G. S. Brady on the Non-parasitic Marine Copepoda 



to a LaopTionte. Neither species is included in the following 

 list. 



Fam. Calanidae, Dana. 



Subfam. CalaninjEj Dana. 



Genus Calanus, Leach. 



(Cetochilus, Roussel de Vauzeme,^f/e Boeck.) 



Calanus finmarchicus (Gunner) . 



Monocnlnsfinmarchicus, Gunner, Act. Hafn. (176o), x. p. 175, f. 20-23. 

 Cetuchilus 'sejdentrionah's, Goodsir, Edinb. New Phil. Joum. xxxv. p. 339, 



pi. G. figs. 1-11 ; Baird, Nat. Hist. Brit. Entom. (1850), p. 335, t. 30. 



figs. 1, a-ff. 

 Cetochilus helgolandiciis, Glaus, Die frei-leb. Copep. (1863), p. 171, t. 26. 



figs. 2-9. 



According to M. Boeck the species described first by Gunner 

 as Monoculus finmarchicus is identical with the Cetochilus hel- 

 golandiciis of Glaus, and not at all with the species called by 

 Baird Temora finmarchica. Leach's genus Ca/anws, however, 

 was constituted to receive Gunner's species, and is synony- 

 mous with the more recent name Cetochilus^ applied by Roussel 

 de Vauz^me to the same animal. Not having the opportunity 

 of reference to the original memoirs of Gunner and Leacli, I 

 must accept as substantially correct M. Boeck's careful account 

 of this synonymy. The generic name Cetochilus must there- 

 fore give way to Calanus. 



The present species, C. finmarchicus^ is generally distributed 

 all round the British 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. 



Genus Clausia, Boeck. 



Clausia elongata, Boeck. 



C'lmtsia elonffata, Boeck, Oversigt Norges Copep. (1864), p. 10. 



Calamis Clausii, Brady, Nat. Ilist. Trans. N. & D. (18G5), vol. i, p. 33, 



' pi. 1. figs. 1-11, 13. 



Often taken in abundance, by the surface-net, in the open 

 sea and in tide-pools, all along our coast. 



Boeck's C. ehngata is undoubtedly the same species as that 

 described by myself (possibly a little later, though I am not 

 perfectly sure as to the actual date of publication of Boeck's 

 monograph) under the name Calamis Clausii. The differences 

 between this and the genus Paracalanus, Boeck {Calanus, 

 Glaus), lie chiefly in the one-jointed inner branch of the first 

 foot, and in the very small or entirely wanting fifth foot of the 

 female. It is, I think, o]ien to doul)t whether these ought to 



