KEYISED REPORT ON L.M.B.C, COPl^lPoDA. 9>7 



COPEPODA. 

 Family I. — Calanid^. 

 Galamis finmarchicus, Gunner. (PL XV, fig. 1.) 

 Length 2.80 mm. A thoroughly pelagic species, common 

 throughout the year but rarely or never taken except in 

 the open sea. When found at considerable depths it is 

 usually of a dark red colour and contains a quantity of 

 oil. It constitutes the chief food of the Greenland whale. 

 Metridia armata, Boeck. (PL XV, fig. 2.) 

 Length 1.80 mm. Single specimens have been rarely 

 found and only in the open sea at a considerable distance 

 from land. The broad leafy terminations {a) of the 

 swimming feet easily distinguish it. 



Pseudocalanus elongatus, Baird. (PL XV, fig. 3.) 

 Length 1.30 mm. Very common throughout the dis- 

 trict and seldom absent in any townet gathering. The 

 females are often found w^ith three or four large ova. 

 Pseudocalanus armatus, Boeck. (PL XV, fig. 4.) 

 Length 1.75 mm. A pair of this rare species w^as 

 taken by surface townet in Port Erin Bay, in 1889, during 

 an illumination of the surface of the sea by electric light 

 from the "Hyaena." Its only other occurrence in the 

 district w^as in the '' Mallard " cruise of 1892 when a 

 single specimen was found among some dredged material 

 taken at a depth of 20 fathoms outside Port Erin. I was 

 at first in doubt whether those specimens were JEtidius 

 armatus, Brady, and after careful examination of them 

 with Brady's description of the latter, I am disposed to 

 query whether the two species are not synonymous. The 

 lateral spines of the posterior end of the cephalothorax 

 readily distinguish it from P. elongatus. 



Paracalanus parvus, Glaus. (PL XV, fig. 5.) 

 Length 1.30 mm. One specimen only of this rare form 

 was taken by townet off Puffin Island. 



