A HISTORY OF 



Sub-class ENTOMOSTRACA {continued) 



Order Copepoda {continued) 



Tribe Arpacticidea 



Family Longifediidae 



Longipedia scotti, Sars. L. coionata, Brady (not 

 Claus) ; L. scotti, Sars. Plymouth (Bourne) 



Family Ectinosomatidae 

 Microsetella norvegica (Boeck). Plymouth (Cleve) 



Family Arpacticidae 



Arpacticus chelifer (O. F. Muller). Torquay (Steb- 

 bing) 



Family Peltidiidae 



Peltidium pnrpureum, Philippi. Ilfracorabe Har- 

 bour (Stebbing) 

 Alteutha depressa, Baird. Plymouth (Bate) 



DEVONSHIRE 



Sub-Class ENTOMOSTRACA {continued) 



Order Copepoda {continued) 



Tribe Arpacticidea {continued) 



Family Diosaccidae {continued) 



Stenhelia pygmaea, Norman and T. Scott. OfFEddy- 

 stone (Norman) 



— simulans, Norman and T. Scott. Near Chequer 

 Buoy, Plymouth (Norman) 



— neglecta, Norman and T. Scott. Salcombe, Mill 

 Bay, Plymouth (Norman) 



— longirbstris, Norman and T. Scott. Salcombe 

 (Norman) 



Ameira simplex, Norman and T. Scott. Estuary of 

 the Exe, near Starcross (Norman) 



Tribe Cyclofidea 



Family Cyclopidae 



Oithona plumifera, Baird. Plymouth (Bourne) 

 — similis, Claus. Plymouth (Clcvc) 

 Cyclopina littoralis (Brady). Plymouth (Bourne) 



Family Idyidae 



Psamathe longicauda, Philippi. Scutellidium tisboides, 

 Claus. Ilfracombe (Stebbing) 



Family Thalestridae 



Phyllothalestris mysis (Claus). Thalestris m., Claus ; 

 Phyllothakstris m., Sars, 1905. The Cattewater 

 (Bourne) 



Dactylopusia valida, Norman and T. Scott. Near 

 Beggar's Island ; Plymouth (Norman) 



Vallentinia ornata (Norman and T. Scott). Dactylo- 

 pusia 0., N. and S. Dredged, coast of Devon 

 (Norman) 



Megarthrum purpurocinctum (Norman and T. Scott). 

 Dactylopusia purpurocincta, N. and S. Dredged, 

 Salcombe (Norman) 



Family Diosaccidae 

 Diosaccus tenuicornis (Claus). Starcross (Parker) 



At this point the new classification of the Cope- 

 poda by Professor G. O. Sars for the moment ends ; 

 and since he rearranges both families and genera, it 

 would be useless, even if one had the requisite skill 

 and presumption, to attempt to forestall its future 

 developments. The following species of the Arpacti- 

 cidea are therefore not allotted to distinctive families. 



Euterpina acutifrons (Dana). Euterpe gracilis, Claus. 

 Plymouth (Bourne, Cleve) 



Tribe Monstrillidea (? Thaumatoessidea) 



Thaumatoessa longispinosa (Bourne). Monstrilla /., 

 Bourne ; Thaumaleus longispinosus, Giesbrecht. 

 Plymouth (Bourne) 



— claparedii (Giesbrecht). ? Cymbasoma ripdum, 



J. C. Thompson ; Thaumaleus claparedii, 

 Giesbrecht. Ilfracombe (Stebbing) 



— thompsonii (Giesbrecht). ? Monstrilla rigida, 



Bourne. Thaumaleus thompsonii, Giesbrecht. 

 Plymouth (Bourne) 



Family Nicothoidae 



Nicothoe astaci, Audouin and Milne-Edwards. On 

 branchiae of Astacus gammarus. Common at 

 Ilfracombe (Stebbing) 



Family Corycaeidae 



Corycaeus anglicus, Lubbock. Plymouth (Bourne, 



Cleve, Hodgson) 

 — venustus, Dana. Plymouth (Cleve) 



Family Oncaeidae 



Oncaea mediterranea (Claus). Plymouth (Bourne, 

 Cleve) 



— minuta, Giesbrecht. Plymouth (Cleve) 



— subtilis, Giesbrecht. Plymouth (Cleve) 



The remaining species will be named without apportionment to tribes, although obviously 

 many of them will belong to the Caligidea and Lernaeidea. 



Family Lichomolgidae 



Hermannella parva, Norman and T. Scott. In Ply- 

 mouth Sound, among Hydrozoa, etc. (Norman) 



Family Asterocheridae (? Ascomyzontidae) 

 Mesocheres anglicus, Norman and Scott. Dredged 



in Plymouth Sound (Norman) 



274 



