156 MAJOK OWEN ON THE SURFAC'E-EATJNA OF MrO-OCEAN. 



In lat. 12° N., long 30^ AV., I believe the same profusion conti- 

 nued ; but my nets were broken. 



In lat. 14° N., long. 33° W., Poraminifera stiU continued in 

 great abundance. G. inflata was the prevailing form ; there were 

 a few of Gr. hidloides No. 2 and G. (Orhulina) universa; I ob- 

 served also traces of G. hulloides No. 1, P. Micheliniana, and P. 

 JKenm^dii. 



In lat. 19° N., long. 36° "W., the Foraminifera became rare. 

 Of Glohigerma, G. lulloides No. 2 and G. infiata were the only 

 forms ; but I observed one individual of P. Micheliniana. 



In lat. 20° N., long. 38° W., no traces of Foraminifera. 



In lat. 30° N., long. 43° W., scarcely a trace of Foraminifera. 

 I met with but seven individuals of G. hulloides No. 2. From 

 the last spot to this, we had passed some Grulf-weed, but it was in 

 very small quantities. 



In lat. 33° N., long. 44° W., slight traces of G. hulloides No. 1. 



On Dr. "Wallich's authority, I should consider that the Fora- 

 minifera are, at times and under certain conditions, plentiful on 

 the surface of the ocean in more northern latitudes in the North 

 Atlantic ; for he has found them abundant at the sea-bottom : (I 

 quote from page 137) " between the Faroe islands and Iceland, 

 between Iceland and East Greenland, and for a considerable por- 

 tion of the direct route between Cape Farewell and EockaU, Glo- 

 higerina is the prevailing form in the deposits." 



It will be observed that there were places in the Indian Ocean, 

 and also in the North and South Atlantic, where I found the Fora- 

 minifera in great abundance' — occasionally for one night only, but 

 generally for many nights in succession, although during the day- 

 time they were absent from the surface ; they did not, then, after 

 rising once and sinking, entirely disappear from the spot, but 

 they would on the contrary reappear nightly over many hundreds 

 of miles of water. 



Their presence on the surface did not depend entirely on the wea- 

 ther ; for in calm nights they have been found absent, or nearly so, 

 while in fresh blowing weather the produce of the net showed 

 that they were plentiful. 



Further observations, if recorded as the above, will show us 

 whether the presence of the Colymbitte is confined to certain 

 localities, or if they are to be met with in equal abundance at 

 different times in all parts of the ocean. 



In the above list of species met with, G. {Orhulina) tmiversa 

 must be understood to include both the other subspecies, viz. 



