RADIOLARIA — TROCHODISCUS, TRYPANOSPH^ERA, XANTIOSPHJERA 197 



TROCHODISCUS HELIOIDES Cl. 



(K. Sv. Vet. Akad. Hancll. Vol. XXXII n. 3 pag. 34 PI. IV fig. 5.) 



1897 December: 12" N. 50° W. 



1898 February: 15° N. 70°— 71° W. 

 March: 9° N. 59° W. 



July: 79° N. 10° E. (deep sea haul). 

 November: 55° N. 44° W. 



Temperature: 21.4, mean of 4 obs., max. 27, min. 6. 

 Salinity: 34.? to 85. os. 

 Plankton-type: 1). ? 



TRYPANOSPH^RA BRACHYSIPHON Cl. 



(K. Sv. Vet. Akad. Handl. Vol. XXXIV n. 1 PI. VI fig. 3.) 



1898 Xorcinber: 56° iN. 17° W. 

 December: 41° N. 66° W. 



Temperature: U.s to 12. 

 Salinity: 34.6o to 35.^5. 

 Plankton-type. ? 



XANTHIOSPH^RA LAPPACEA Hkl. 



(Chall. pag. 120 PI. VIII fig. 10, 11.) 



1899 June: 33° N. 48° W. 



December: 41° N. 66° W. 

 1899 April: 28° N. 75° W. 



Temperature: 19.5, mean of 3 obs., max. 24, min. 12. 

 Salinity: 34.79, mean of 3 obs., max. 36.42, min. 3i.6o. 

 Plankton-type. Found in the central Pacific. — D. '? 



