116 CILIATA — DICTYOCYSTA 



Plankton-type. This species occurs in the Mediterranean the 

 Red Sea and Indian Ocean. It enters the Atlantic west of S. Africa 

 and has been seen to the region of Ascension, Gape Verde, Canaries 

 and the Azores. In April (1898) it reached 45° N., in May it touched 

 S. Iceland. It was seen in September N. of Iceland. — .S. 



DICTYOCYSTA MITRA Hkl. 



(v. Daday: Mitth. d. zool. Stat. Neapel Vol. VI, 1886, PI. XXV iig. 16). 



1897 December^ and 



1898 January: 32° N. 33° W. to 43° N. 18° W. 



March: area between 45° N. 36° W., 44° N. IT" W., the Ca- 

 naries and 30° N. 35° W. ^ 



April: 48° N. 29° W 



May: area between 43° N. 45° W., 49° N. 17" W. and 38° 

 N. 21° W. 



June: 48° N. 33° W.; 37° N. 26° W. 



July: 38° N. 25°— 26° W. 



August: Azores; 40° N. 66° W. 



September: 48° N. 24° W.; 42" N. 57° W..to 41° N. 65° W. 



October: 41° N. 59° W. 



November: 34° N. 10° W.; 48° N. 29° W. to 42" N. 64° W. 



December: 49° N. 30° W. to 41° N. 66° W. 



1899 January: 45° N. 49° W. 

 March: 33° N. 32° W. 



May: 35° N. 75° W.; 25° S. 7° E. 

 June: 20° S. 2° E. to 14° S. 6° W. 

 October: 53° N. 37° W., rare. 

 November: 51° N. 34^ W., rare. 



Temperatupe: 17.76, mean of 50 obs., max. 23, min 8. 



Salinity: 35..ti, mean of 36 obs., max. 36.68, min. 33.98. 



Plankton-type. This species occurs in the Benguela Current, 

 W. of S. Africa, and its principal area of distribution in the northern 

 hemisphere is between the Canaries, the Azores, S.W. of Ireland 

 and the Newfoundland Banks. — S. 



