1 U) IIADIOLARIA — CHALLKNIiERIA 



ISM!) April: :iH ' N. 74° W. 



Temperature: 2:2] lo 2t).H. 

 Salinity: M.sn lo 36 -i. 

 Plankton-type: 7J? 



CHALLENGERIA HARSTONII J. Mi rrav. 



(Chall. Report. Norrative I pag. 226 A. fig. 14 a.) 



ISHS July: 78" N. H^ W (deep sea haul). 

 Aiif/nsc: H(T N. 10° E. (deep sea haul). 

 September: 76" N. 15° E. 



Plankton-type. Noted from the east of Japan, abysmal. 



CHALLENGERIA TRIDENS Hkl. 



(Moebius Fiinfte Ber. d. Kieler Comro. PI. VIII fig. 4:3-44) 



1898 July: 78= N. 8" W. (deep sea haul). 



Anyii^r: 6;-] ' N. 15- W.; 78- N. 1'2" E.; 80 X. 10 E. (deep 



sea haul). 

 Septrniher: 65" N. 36° W; 76^ N. i:!' E.; 72--76^ N. 19"- 



15° E. (deep sea hauls). 

 October: 64- N. 21- W. 

 Ahreniher- 63° N. 16° W.; 56 N. 30° and ;i6- W 



1899 Xxvember: 52 N. 18° W. 



Temperature: 7.6, mean of 6 obs., max. 10. s min. 6. 



Salinity: 35. o?, mean of 6 obs., max. 35.si, min. 34.59. 



Plankton-type. Noted from the Faroe Channel. The area of 

 distribution is, according to the above statements, essentially nor- 

 thern, from 52° to 8(.i- N. The mean salinity is higher than for 

 ,Tricho-plankton. — ? 



CHALLENGERIA XIPHODON Hkt,. 



(Moebius: Fiinfte Ber. d. Kieler Commiss., 1887, PI. VIII fig. 41— 42.) 



1897 Deeeiaher and 



1898 January: Cape Verde Islands; Canaries; :}4° \. .30" W. to 41° 



N. 22° W. 



