11-6 RADIOLARIA — CHALLENGERIA 



1899 April : m" N. 74 W. 



Temperature : 22 i to 26. s. 

 Salinity: 31.ss tn 8621. 

 Plankton-type: />? 



CHALLENGERIA HARSTONII J. :\Iurray. 



(Cball. Report. Norrative 1 pag. 226 A. fig. 14 a.) 



1898 July: 78° N. 3^ W. (deep sea haul). 

 August: 80° N. 10° E. (deep sea haul). 

 Septfrnhrr: 76= N. 15° K. 



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

 CHALLENGERIA TRIDENS Hkl. 



(Moel.ius Fiinfte Her. d. ICieler Comm. I'l. VIH fig. 4:-5-44.) 



1898 JkJi/: 78° N. 3° W. (deep sea haul). 



August: 63° N. 15° W.; 78° x\. 12° K.; 80° X. 10° E. (deep 



sea haul). 

 SopU-mhcr: 65° N. 36° W; 76° N. 13° E.; 72°— 76° N. 19° — 



15° E. (deep sea hauls). 

 October: 64° N. 21° W. 

 Norcinber: 63° N. 16° W.; 56= N. 30" and 36^ \V. 



1899 Xovcmhpr: 52° N. 48° W. 



Temperature: 7.0, mean of 6 obs., max. 10. s min. 6. 



Salinity: 35. ot, mean of 6 obs., max. 35.3-t, min. 31.50. 



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

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

 thern, from 52° to 80° N. The mean salinity is higher than for 

 Tricho-plankton. — ? 



CHALLENGERIA XIPHODON I Ike. 



(Moehius: Fiinfte Ber. d. Ivieler Commiss., 1887, V\. Vtll fig. 41— i'2.) 



1897 Deccnibcr and 



1898 Jnnuari): Cape Verde Islands; Canaries; 34° N. 30° W. to 41° 



N. 22° W. 



