COPEPODA FEOM WEST OF IRELAND. 129 



becoming common in March. Metridia armata a species 

 not usually common, occurs in more than half the bottles and 

 on some occasions in fair numbers, especially during the 

 winter months. The gradually tapering setose antennae 

 and the leaf-shaped terminations to the swimming feet, 

 distinguish it readily. One of the rarest species taken, 

 and previously unknown to the district is Bhincalanus 

 cornutus, easily distinguished by its long projecting 

 cruciform rostrum, and by its antennae. On two occasions, 

 in August and October, one specimen only was found. 

 It has only I believe been previously reported in Britain 

 on one occasion, by Mr. Thomas Scott, off the Shetland 

 Isles. 



Gentropages hamatus occurs in half the bottles, but 

 usually sparingly, and G. typicus much less frequently. 



In a tube sent to me by Mr. A. 0. Walker were two 

 specimens belonging to the Dublin Museum collection, 

 and marked " West of Ireland," which on examination 

 proved to be Euchceta marina and Pontella Jcroyeri both 

 new to the district and very uncommon in our northern 

 seas, although I have previously taken one specimen of 

 each in the L.M.B.C. district. 



Isias clavipes occurs on only three occasions. Acartia 

 clausii was generally found and fairly plentiful, except 

 during spring and early summer, and Oithona spinifrons 

 under much the same conditions. Gandace pecti?iata a 

 species generally rare in our seas, has proved to be here not 

 uncommon, occurring, however, only during the summer 

 and early autumn. On only two occasions throughout 

 the year that very conspicuous species the beautifully 

 coloured Anomalocera patersonii was found, while as 

 alluded to in the last report it sometimes occurs in our 

 seas in dense shoals. 



It was interesting again to find the southern species 



