82 TRANSACTIONS LIVERPOOL BIOLOCxICAL SOCIETY. 



trogidae 6, Chondrocanthidse 1, Caligidae 6, Lernaeidse 1, 

 and Lernaeopodidse 1 species. 



It will be noticed that the above enumeration includes 

 both the free swimming and semi-parasitic and wholly 

 parasitic species, any exact line of division being impracti- 

 cable as many of the semi-parasitic species are free 

 swimmers at night being also occasionally taken by townet 

 during the day. This is especially the case wdth members 

 of the family Caligidae. 



During the many expeditions in the " Hyaena," " Spin- 

 drift," "Mallard" and other vessels, townets at the 

 surface and at various depths have been systematically 

 employed ; and washings from dredged material have 

 often yielded good results. The establishment of the 

 Marine Biological Station upon Puffin Island early on in 

 our work, under the directorship of Professor Herdman, 

 F.E.S., proved of the greatest service as regards the 

 investigation of Copepoda, for besides affording the oppor- 

 tunity of frequent personal visits, the resident curator 

 during the greater part of the time forwarded legularly 

 townettings, dredged mud, &c., for examination taken 

 at various hours day and night and throughout the entire 

 year. After five years work at Puffin Island, the removal 

 of the L.M.B.C. Station to Port Erin at the south-west 

 corner of the Isle of Man in the summer of last year has 

 proved a complete success. The accessibihty of the new^ 

 station and its more completely equipped laboratory have 

 facilitated the ready examination of living specimens 

 immediately on landing from the boats, a circumstance of 

 great value when dealing with minute forms of life hke the 

 Copepoda subject to rapid decomposition. 



The muddy bottom of Port Erin Bay inside the break- 

 water has proved an exceedingly rich hunting ground for 

 Copepoda, several of the new species having been taken 



