81 



[WOKK FllO.M THK 1'0|:T KKIN l!I( »!.(.(; ICAI. STAIKjX.] 



EEVISED KEPOKT on the COPEPODA of 



LIVEKPOOL BAY. 



By Isaac C. Thompson, F.L.S., F.Pt.M.S. 



With Plates XV to XXXV. 



[Read February lOtli, 1893.] 



Three previous Keports have been issued upon the 

 Copepoda of the L.M.B.C. District, the last being in the 

 year 1889. Since that time so many species new to the 

 district have been found that it was thought advisable to 

 draw up a complete Eeport of all the species recorded in 

 the district up to the present time. 



Previous to the work of the L.M.B.C, commenced in 

 1885, very little in this group had been done, six species 

 only of marine Copepoda having been recorded in our 

 area. The present Eeport deals with 136 species of which 

 18 are new^ to British seas, 11 of them being new to 

 science. Those new to British seas are as follows : — 



Lahidocera acutum, Dana, Euchceta marina, Prestan- 

 drea, Giardella callianassce, Canu, Monstrilla dance , 

 Claparede, Monstrilla rigida, Thompson, Sabelliphilus 

 sarsii, Claparede, and Artotrogus orbicularis, Boeck. 

 Those new to science are : — 



Herdmania stylifera, Cyclops marinus, Hersiliodes pu- 

 ffini, Jonesiella hycencB, Amsira attenuata, Stenhelia denti- 

 culata, Stenhelia hirsuta, MonstriUa longicornis, Laop- 

 lionte spinosa,Cletodes vionensis, a.nd Lie Jioniolgics maxinius. 



The total number 136 species are divided amongst the 

 various famiHes as follows : CalanidcB 13 species, Pon- 

 tenida3 4, Misophridee 8, Cyclopidse 7, Notodelphidoe 7, 

 Harpacticidge 72, Monstrihidas 4, Sapphirinidas 11, Arto- 



