116 BRITISH COPEPODA. 



closely with those of 0. Clausii. I cannot help sus- 

 pecting that after all both C. Kaufmanni and C. Clausii 

 may be merely varieties of one and the same species. 

 As regards nomenclature, Heller's specific name, 

 whether applicable to the present species or not, must 

 be discarded, having been used by Sir John Lubbock 

 to designate a far different form with 17- jointed 

 antennas. I therefore propose for this species the 

 name Helleri.* 



I have found C. Helleri at Tresco (Scilly), Fenham, 

 near Newcastle, at Whitburn (County Durham), in 

 Oulton Broad (Suffolk), and in Lough Cam (Conne- 

 mara). 



12. CYCLOPS PHALERATUS, Koch. PI. XXIII, figs. 7 13. 



Cyclops pTialeratus, Koch. Deutschlands Crustaceen, &c., H. xxi, 



tab. ix (1841). 

 Sars. Oversigt Ferskvandscopepoder, p. 46 



(I860). 



Uljanin. Reise in Turkestan (Crustacea), 

 p. 38, t. ix, figs, 15 (1875). 



canthocarpoides, Fischer. Bulletin de la Soc. Imp. des 



Nat. de Moscou, torn. 24, p. 426, t. x, 

 fig. 24, 25, 3238 (1851). 

 Lilljeborg. De Crust, ex ord. trib., p. 208 

 (1853). 



Glaus. Das Genus Cyclops, p. 37, t. i, 



figs. 610 (1857) ; Die frei-lebenden 

 Copepoden, p. 102, t. iv, figs. 1 4 

 (1863). 



Fric. Die Krustenthiere Bohmens, p. 223, 

 fig. 19 (1871). 



Anterior antennoo short and moderately stout, not 



* The inscription on Plate XXII, " Clausii" should stand "Helleri." 



