of the Copepod Genus Nitocra. 217 



dorsally. In the male there is a transverse row of spines at 

 the base of the operculum. Furcal rami broader than long. 



First leg : endopodite slightly longer than exopodite, its 

 first joint exceeding the first two joints of the exopodite. 



Second and third legs : inner seta of third jotnt of 

 exopodite present. 



Fifth leg of female : basal joint with five setse. Second 

 joint oval, with five setse. In the male the basal joint has 

 three or four setae, and the second joint has six setse and is 

 broader than in the female. 



Habitat. Brackish water. 



Distribution. Norway ; Novaya Zemlya ; Baltic coast of 

 Germany ; Syria. In Britain — Shetland islands ; West Loch 

 Tarbert ; Unst ; Langbank ; Dumbarton ; Bay of Nigg ; 

 Hengistbury Head. In Norfolk — Oulton Broad ; Breydon 

 Water; Horsey; Lower reaches of River Bure ; Salthouse. 



3. Nitocra ti/pica, Boeck. (Fig. 1, 1 ; fig. 2, A.) 



Nitocra typica, Boeck, ibid. p. 274 (1865) ; Sars, Crust, of Norway, 



v. p. 212. 

 Ameira amphibia, Brady, Nat. Hist. Trans. Northd. xiv. 1902, p. 57. 

 Nitocra oligochceta, Giesbrecht, 4th Ber. Comm. AViss. Unt. deutscli. 



Meeres, 1882, p. 116. 



Rings of spines on abdominal segments incomplete 

 dorsally or broken by a series of exceedingly fine cilia. 

 Lateral spines very long. Furcal rami broader than long. 



First leg : first joint of endopodite considerably longer 

 than the whole exopodite. 



Second and third legs : inner seta of third joint of exo- 

 podite and seta of basal joint of endopodite present. 



Fifth leg : ? — basal joint with five setae, 2nd joint oval, 

 broad, with six setae. J — basal joint with four setae, 2nd joint 

 with six. 



Habitat. Marine (muddy shores) or brackish water. 



Distribution. Norwegian Coast ; Kiel Bay. In Britain — 

 Salcombe; Southport ; Scilly Islands; Newcastle, Co. Down; 

 Salthouse (Norfolk). 



4. Nitocra simplex, Schmeil. (Fig. 1, 3 ; fig. 2, C.) 



Nitocra simpler, Schmeil, Zeits. Naturw. Ixvii. 1894, p. 347. 

 Nitocra mulleri, Van Douwe, Zool. Anz. xxviii. 1905, p. 434. 



Rings of spines on abdominal segments incomplete 

 dorsally. 



First leg : endopodite and exopodite of about the same 

 length. 



