MARINE BIOLOGICAL STATION ON PUFFIN ISLAND. 



DATE. TEMP. OF SEA. TEMP. OF AIR. CONDITION OF SEA. 



1889. max. min. 



Jan. 1 45" F 43° 33" Water clear. 



45.5° 500 450 ^ 



420 420 340 



41.50 440 390 \SagiUa so abundant in all the 



410 350 280 1 surface tow-nettings both day 



400 -uo 970 I ^^^ ^^S^^^' ^^^ especially the 



■■ ■ 1 latter, as to obscure all else. 



42.50 520 440 _ 



410 390 330 ... 



410 330 290 Water becoming dirty {Coscino- 



discus concinnus). 



42.50 470 350 Sagitta Siud Calanus finmarchicus 



abundant. 

 430 510 390 Water very dirty. No use tow- 

 netting. 



450 50 370 Same condition continued for 



some time. 



440 420 3^0 Water clearing a little. 



45.50 540 350 Water still too dirty for tow- 

 netting. 



480 640 480 Water clear again. Many larval 



Crustacea. 

 50° 640 450 Brown gelatinous matter ap- 

 pearing. 



520 gQo 490 Gelatinous matter in abundance. 



540 600 490 Gelatinous matter very thick. 



56.50 080 560 Water still full of gelatinous 



matter. 

 57.50 640 550 First appearance of vivid phos- 

 phorescence at night. 



580 Medusa; in abundance. 



440 Small Medusae in abundance. 



500 Medusae still abundant. 



500 3j;i|i some Coscinodiscus concinnus. 



490 Water very turbid. 



490 Water clear. Good tow-netting. 



450 Ctenophora {Pleurohrachia) in 



great numbers. 

 500 Ctenophora and ^S'rt^zYto very nu- 

 merous. 



470 Water very dirty. Tow-netting 



impracticable. 

 44 Tow-net choked with Ctenophora. 



550 Ctenophora still numerous; also 



Sagitla and larval Decapods. 

 Shoals of Herring round the 

 island. 

 490 490 Water very dirty. 



