REPORT ON THE COPEPODA. 203 



These works have been followed in the arrangement and 

 nomenclature of the species. 



Order COPEPODA. 

 Family I.— Calanid^. 



Calanus finmarchicus, Gunner. 



Getochilus septentrioualis, Goodsir, Ed. New Phil. Journ., xxxv, 



p. 339, t. vi, figs. 1-11 (1843). 

 Getochilus septentrionalis, Baird, Nat. Hist. Brit. Entom., 



p. 235, t. XXX, tigs, la-g (1850). 



Quantities of this species were found in most of the tow- 

 net gatherings taken by Prof. Herdman off Port Erin, at 

 the south end of the Isle of Man, during August. This is 

 probably the most abundant and most widely diffused of all 

 the Copepoda, and it is somewhat singular that it does not 

 occur in any of the tow-net gatherings taken off the Welsh 

 coast or in the neighbourhood of Hilbre Island earlier in 

 the season. It luxuriates in the open sea. 



Pleuromma abdoviinale, Lubbock. 

 Pleuromma gradle, Glaus. 



One female Copepod taken in the tow-net off Port Erin, 

 Isle of Man, in the evening, after sunset, appears to belong 

 to this species, which has not hitherto been found in British 

 seas. The specimen, after having been mounted as a 

 microscope slide, was examined by Dr. Brady, and he has 

 stated that he felt unable to name it positively without 

 dissection, but that it seemed to be new to the British 

 Fauna. 



The specimen on a careful examination is found to agree 

 in all essential points with the description and figures Brady 

 gives * of an immature condition of Pleuromma abdominale 

 undoubtedly identical with Glaus' Pleurom^ma gracile. 



* " Challenger " Report, p. 46. 



