HADIOf.AKIA XYOOCIHCI S, ZYfiOSTAIltUS 199 



ZYGOCIRCUS PRODUCTUS I! IIi in wic.) 



{Litli(H-iri-it.< jinid. lli;ur\\. Ur<raiiism. d. li.idinl. I'l. VII fig. 1.) 



1S9S February: 84^ N. 7:5 W. 

 Marrh:\2'' N. 51 W. 

 May: 41= N. bV" W. 

 Septciiibcr: 25°— 3:r^ N. 74' W. 



(hi<,J,i'r: 26 N. 76' W. 



Temperature: 24.3, mean of 6 obs., max. 28, min. 19. 

 Salinity: .■')(>. is, mean of 4 obs., max. 36.;io, min. H6.01. 

 Plankton-type. Found in the Atlantic, Mediterranean and 

 Pacific. — 1>. 



ZYGOCIRCUS RHOMBICUS Ilia..' 

 (Chall. pag. !t4().) 

 1898 February: US N. 71 W. 



Temperature: 20. t. 



Plankton-type. Found in the south Atlantic. — I). ? S. '? 



ZYGOCIRCUS TRIQUETRUS IIki.. 



(Chall. pag. 9i.7 PI. 81 fig. 3.) 

 1898 February: 16 ^N. 71 \V. 



Temperature: 20.?. 



Plankton-type. Found in Iho Atlantic. Mediterranean and Pa- 

 cific. — h •' S. -^ 



ZYGOSTAURUS SAGITTALIS IIkl. 



iCfiall. pag. 775 PI. CXXXI fig. 8.) 



1897 December: 12° N. 50° W. 

 February: 26° N. 74° W. 

 3/r//T//:'2H° N. 28° W. 



Temperature: 2H.7, mean of 3 obs., max. 2()..-,, min. 20. u. 



Salinity: 36.!»i (one obs.). 



Plankton-type. Found in the central Pacilic l>. 



