APPENDIX. 



By JOHN MURDOCH, A. M., Sergeant Signal Corps, United Slates Army. 



A. NOTES ON SURFACE LIFE UNDER THE SEA-ICE, FROM FEBRUARY 27 TO JUNE 



8, 1883. 



At the suggestion of Lieutenant Ray, a towiug-uet was arranged so tliat it could be attached 

 to the line of tlie tide-gauge and set at different depths under the ice (see diagram). The water 

 was about 17 feet deep. When a strong current was running in either direction the net was dis- 

 tended and many animals captured. 



The not was visited generally every day, unless the weather was too severe to handle it. Early 

 in the season the bucket of water containing tho washings of the net was so lull of ice crystals 

 that it had to be thawed before the stove before it could be examined. 



Frlniary 21. Current NK. Temperature of the water, 29.l F., net set near the bottom. 

 Small copepods resembling Cyclops, a few. 

 JEgina <-i/rca, - small ones. 

 TK/T/.V .' s|i.. a lew .small. 

 Filii-imry U8. Conditions as above. 

 <'<>l)<:)n><lx : rather plenty. 

 IHtixtyUs sp., 1, small. 

 l'><:f<>< : i-Hxioln. 1, about O.L' inch long. 

 .K<jin<( all mi, 1 or 2, very small. 



March 4. Current and temperature as before, net set near surface. ' 

 Ii.t s]i.. 1, small. 



: a (e\v. 

 Tic ;<)<" rwiilii, very abiuidant. Irum size of pin-head to about O..S inch in diameter. 



193 



II. Kx. 44 1.'5 





