CRUSTACEA OP NORTHUMBERLAND AND DURHAM 385 



1907. Attheyella crassa, G. O. Sars (6), vol. v., p. 199, 

 pi. cxxix. 

 A small species, probably not uncommon, but easily over- 

 looked. The only localities in our district of which we have 

 notes are an engine-pond at Murton Junction, near Sunder- 

 land, and a " ferruginous ditch at the roadside half-way 

 between Haydon Bridge and Staward " (G. S. B.) N.D. 



Attheyella pygm/ea (G. O. Sars). 



1863. Canthocamptus pygmceus, G. O. Sars, loc. ctf., p. 21. 

 1880. Attheyella cryptoriim, Brady (3), vol, ii., p. 60, 



pi. lii., figs. 1-18. 

 1907. Attheyella pygincea, G. O. Sars (6), vol. v., p. 202, 



pi. cxxxi. 

 A commoner species apparently than the preceding, and 

 widely distributed, preferring pools and ditches rather than 

 large expanses of water. Our only local record is, however, 

 from a very different situation — "the damp roof of the pit 

 workings of the low main. West Cramlington Colliery, living 

 among films of gelatinous algas." These specimens were sent 

 to us by the late Mr. Atthey, and the genus was named after 

 him, but the species — thought at the time to be new — had 

 been previously described by G. O. Sars as a Canthocamptus. 

 We still think, however, that the characters are such as to 

 warrant a generic distinction. N.D. 



Mesochra LiLLjEBORGi Boeck. 



1864. Mesochj-a Lilljeho7-gi, Boeck, Oversigt af Norges 

 Copepoder, p. 51. 



1880. Mesochra Lilljeborgi, Brady (3), vol. ii., p. 62, 

 pi. xli., figs. 15-21, pi. xlvii., figs. 16-21. 

 In the north-eastern district this species seems to be con- 

 fined to brackish water localities, having been found only in 

 salt-marsh pools at Seaton Sluice and Alnmouth (G. S. B.) N. 



Tachidius discipes Giesbrecht. 



1869. Tachidius brevicornis, Brady, Nat. Hist. Trans. 

 Northumberland and Durham, vol. iii., p. 130, pi. v., 

 figs. 1-9. 



