122 DB. E. l. MOSS ON THE 



Sabcoptid^. 



Debmaleiohus. 



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

 rarius longicaudatus, lat. 82° 27', Sth July, 1876, bears tbe name 

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



Postscript. Marcli 1878. 



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

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

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

 Voyage, = algida, 'LefebYre, = se^tenfrionis, 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 

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

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

 type of septentrioiiis and in some examples of MicJiardsoni, I feel 

 compelled to accept the opinion that 'Feildeni must be considered 

 only a variety of Hichardsoni. 



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

 cies ; or, if it does, Hichardsoni 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 Edwakd L. 

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

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



[Eead November 16, 1877.] 



The seas to the north of the Greenland 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 : — 



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

 at least, monopolized by Peridinea. 



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



