740 Proceedings of the Royal Irish Academy. 



Rhincalanus cornutus, a rare deep sea species, occurred twice only, 

 viz. in August and early in October, 1896. It tas a "wide 

 geographical range, being reported from the Northern and 

 Southern Atlantic Oceans, as "weU as intermediate, being re- 

 ported from the Mediterranean and the Canary Islands. It is 

 readily recognized by its long projecting cruciform rostrum and 

 by its long antennae. 



Pseudocalanus elongatus was foimd in almost every bottle, and 

 during each month fi'om 1895 to 1898. At times it was very 

 abundant. 



Bradyidius armatus (= Pseudocalanus armatus) was found on two 

 occasions only, viz. September, 1895, and February, 1897. 

 The other recorded habitats are Greenland ; "W^est coast of Scot- 

 land; and rarely in the L. M. B. C. District, off the Isle of 

 Man. 



Centropages hamatus was generally present in the tow-nets thi'ough- 

 out the year. 



Centropages typicus was much less frequently met with. Both these- 

 species are commonly met with in about the same relative pro- 

 portions round the British coasts. 



Isias clavipes occurred in several of the spring and summer gather- 

 ings, but seldom in any quantity. Its recorded range extends- 

 from J^orway, around the British Isles, and as far south a& 

 Gibraltar and the Canary Islands. 



Temora longicornis was common throughout the collection except in 

 mid-winter. Its range extends to both sides of the Atlantic. 



Metridia longa, a species not usually common, occurred in more than 

 half the bottles, and on some occasions in fair numbers, espe- 

 cially during the winter months. The gradually tapering setose 

 antennae and the leaf-shaped terminations to the swimming feet 

 distinguish it readily. Its first recorded British habitats are in 

 the Yalencia neighbourhood (Brady's " Free and Semi-parasitic 

 Copepoda of the British Islands," vol. i., p. 42). I have taken 

 it very sparingly in Livei-pool Bay and in parts of the Clyde. 

 Scott reports it from the Forth. 



Candace pectinata, a species generally rare in our seas, has proved to 

 be not uncommon in the Valencia distiict. It was first reported 

 by Drs. Brady and Eobertson at a depth of 40 fathoms off the 

 Scillv Islands. Professor Herdman took it once during his. 



