Zoo log)'. 221 



Pantopoda. 



Pycnogonida. — -No researches seem to have been made 

 on this interesting group of marine arthropods in the Belfast 

 district since Thompson,^ in the last volume of his work, 

 recorded, from the coasts of Down and Antrim, eight out of 

 the nine species then believed to inhabit the Irish seas. 

 Unfortunately three of these species —^Vrw/Z/c^^ grossipeSy 

 Linn., A^./o/uisfo/ii, Goodsir, and N.fenioratiim, Leach — are 

 of uncertain value, though it is highly probable that some 

 of the pycnogons referred to by these names belong to the 

 form now known as N. gal/icit/n, Hoek, which has a wide 

 distribution around the Irish coasts as well as off the Isle 

 of Man. The other species recorded from the district are 

 Ny7tiphon graci/e, Leach, Chcefofivniphon spinosum (Goodsir), 

 Belfast Bay, Phoxichilidium femoratu?)i (Rathke), Strangford 

 Lough, and Pycnogonutfi littorale (Stroem).- 



G. H. C. 



CRUSTACEA. 



The Crustacea may be roughly classified into two great 

 groups, one of which — the Entomostraca — contains almost 

 all the minute forms, many of them parasitic; while the term 

 Malacostraca is applied to all the larger and higher Crustacea. 



Entomostraca. — -Since Norman and Brady's Mono- 

 graph of the British Cladocera appeared in 1867, very little 

 has been published on Irish Phyllopods ; but Creighton 

 and W. F. de V. Kane^ have recently devoted some attention 

 to the freshwater forms, and the latter has recorded two 

 northern species from Lough Neagh (viz., Bythotrephes 

 Cedersi?'cemi and Bosmina mixta) which were not previously 

 known from the British Islands. Among the commoner 

 Lough Neagh Cladocera, formerly recorded by Haliday, 

 may be mentioned Eiirycercus lamellatus. 



1 W. Thompson. — The Natural History of Ireland, vol. iv. London, 

 1856 (p. 412). 



2 G. H. Carpenter. — On some Pycnogonida from the Irish Coasts. 

 Proc. R.D.S., vol. viii, 1893, pp. 195-205. 



3 W. F. DE V'. Kane. — Mysis relicta in Ireland. Ann. and Mag. 

 Nat. Hist. (7th s.), vol. viii, 1901, pp. 391-397. 



