244 CEYLON PEAEL OYSTER REPORT. 



Clausocalanus arcuicornis (Dana). 

 Rarer than the preceding species, hut similarly distributed. It occurred at 

 20 stations. 



Pseudocalanus elongatus (Boeck). 

 One of the commonest British species ; occurred at 6 stations, extending as far 

 south as the Gulf of Suez. 



iEtideus armatus, Beady. 

 A species widely distributed throughout the Atlantic, Pacific and Indian Oceans, 

 hut only taken at 3 stations in this collection, from the Mediterranean to the Gulf 

 of Suez. 



Undeuchaeta minor, Giesbr. 

 Occurred off Gibraltar, and at 2 stations in the Indian Ocean ; the latter are 

 additions to its hitherto known range. 



Euchirella rostrata (Claus). 

 Occurred twice in the Indian Ocean. 



Euchirella messinensis (Claus). 

 . Only once taken, off Minikoi, west of Ceylon, thus considerably extending its 

 southern range; the Mediterranean and the Gulf of Gascony being the only 

 previous records. 



Euchaeta marina (Pbestand.). 



A common ocean species; occurred at 36 stations, extending throughout the 

 entire traverse. 



Euchata spinosa, Giesbr. 

 Found very sparingly off Gibraltar and in the Mediterranean, and again oil' 

 Ceylon ; not previously reported from the Indian Ocean. 



Euchaeta acuta, Giesbr. 

 Taken at 2 Mediterranean stations, between Messina and Port Said. 



Euchaeta concinna, Dana. 

 Occurred at 3 stations in the Bed Sea and at 4 stations round Ceylon. 



Euchaeta barbata, Brady. 

 Occurred at 2 stations in the Indian Ocean near Ceylon. Known previously only 

 from the Atlantic. 



