COPEPODA FROM WEST OF IRELAND. 139 



alluded to in the previous report, Coryccens speciosus, 

 though on only one occasion, and more frequently its 

 very similar ally G. anglicns, the latter having been 

 frequently reported from Plymouth. 



Parapontella brevicornis occurred once in July and 

 on several occasions in February. One specimen of 

 Monstrilla dance was taken on August 3rd. Great 

 interest attaches to the family Monstrillidse through the 

 recent important discovery of Prof. Giard of Paris and 

 confirmed by M. Malaquin that the early stages of one or 

 more species of this group are spent parasitic in the 

 body cavity of certain worms (see Gomptes rendns, 16 

 novembre 1896, and 28 decembre 1896, and 11 Janvier 

 1897). 



G aligns rapax was collected in the tow-net on two 

 occasions by the Misses Delap in December and January. 

 The various species of the genus Caligus, though all fish 

 parasites, are not uncommonly found as free-swimmers 

 particularly at night. 



The eight species, viz., Harpacticns fulvus, Thalestris 

 longimana, T. clausii, Ectinosoma spinipes, Longipedia 

 coronata, Cyclopina littoralis, Porcellidium viride, and 

 LaopJionte hispida are all fairly common littoral forms, 

 generally found in rocky pools or near to shore. Their 

 presence again suggests the regret that in addition to the 

 valuable collection taken by tow-net, Mr. Browne and his 

 co-workers did not preserve mud and sand dredged at 

 various depths, and the washings of dredged material. 

 For judging by results in Liverpool Bay it is to these 

 sources we must chiefly look for forms new to science 

 among the Copepoda. While we have doubtless still 

 much to learn as to the causes which influence the 

 distribution of the free-swimming forms, we can hardly 

 now expect to add very many to the number of those 



