122 



DB. E. L, MOSS ON THE 



Saecoptid^. 



Deemaleiohtts. 



One example of this genus of bird-mites, taken from Sterco- 

 rarius longiicaudatus, lat. 82° 27', 8tli July, 1876, bears the name 

 " i). stercorarinus, Murray" (No. 12). 



PosTscEiPT. March 1878. 



Mr. Butler has called my attention to the probability that Ma- 

 mestra(?) Feildeni {anU, p. 112) is identical with Anarta Bichard- 

 soni, Curtis {Hadena JRichardsoni, Curtis, in Appendix to Boss's 

 Voyage, = aJgida, JjeiehYre,^ se^tent7nonis, "Walker), a widely- 

 spread Arctic insect. 



I was inclined to this opinion when working out the insects ; 

 but the contour of the wings appeared too different ; though this is 

 perhaps owing to the flattened condition of the type. The mark- 

 ings also do not fully accord with those of any specimen of 

 Bichardsoni seen by me ; but the species is very variable. 

 Having, however, been permitted to denude the anal parts in the 

 type of septentrionis and in some examples of Bichardsoni, I feel 

 compelled to accept the opinion that Feildeni must be considered 

 only a variety of Bichardsoni. 



The larva found by the Expedition cannot belong to this spe- 

 cies ; or, if it does, Bichardsoni cannot be an Anarta. — E. M'L. 



Preliminary Notice on the Surface-Fauna of the Arctic Seas, as 

 observed in the recent Arctic Expedition. By Edwaed L. 

 Moss, M.D., late Surgeon H.M.S. 'Alert.' Communicated 

 by Dr. J. Mueie, E.L.S. 



[Read November 16, 1877.] 



The seas to the north of the Grreenland settlements are subject to 

 such varying conditions at different seasons of the year, that their 

 surface-fauna cannot be supposed to be very constant. But, 

 taking them as we found them, they may, for description's sake, be 

 divided into three zoological regions : — 



Eirst. A district in the latitude of Melville Bay, temporarily, 

 at least, monopolized by Peridinea. 



Second. A north-water region, including the " north water " of 



