254 niNOFLAGELLATK^OXYTOXIM, 



1S99 April: 40 N. 13^ W. and 32^ N. 75^ W. 

 July: il' N. 37" W. 

 Xorcinhcr: 51" N. 13 W., very rare. 



Temperature: 10. n. mean of 14 ob.s., max. 24.4, min. 1)..-,. 

 Salinity: 35 ts, mean of 9 obs., max. 36.54. min 35. n. 

 Plankton-type: s. 



OXYTOXUM SCEPTRUM (Steix.)' 



(Pyrgidium sc. D. Org. d. Infus. PI. V lig. ID — 21.) 



1898 Ap/-i/: 3(V^— 32^ N. 28^—34' W.; 20"— 27^ N. 43^—47' W. ' 

 May: 44^^—47° x\. 19^—13^ W. 

 June : 34" N. 46'^ W. 



Temperature: 18.s, mean of 4 obs., max. 23.1-, min. 13. c. 



Salinity: 3().is (one obs.). 



Plankton-type. Noted from the Mediterranean. — D. 



OXYTOXUM SCOLOPAX (Stkin).^ 



(Schi'tt: D. Peridineen d. Plankton-exji. PI. XV^III fig. 55. 



1898 Jar/nary: 32" N. 34' W.; Azores. 



Frhritary: 19=— 21^ N. 52^—50" W.; Caribbean Sea; 27^— 3 T 



N. 41^—35° W. 

 M(i/-r/i: Caribbean Sea; 29" N. ifr W.; 41 "—45^ N. 21"— 



19" \V. 

 Ap7i/: IV N. 20' W. to 16" N. 5(5" W. 

 May: Caribbean Sea; 16'— 20 N. 58'— 54' W.; 30' N. 44" 



W. to 47' N. 13^ W.; 45' N. 43' W.; 50' N. 14' W. 

 Ji'f/r: 34' N. t7" W.; 37' N. 26' W.; 48' N. 33" W.; 50' N. 



18- W. . 



.//////; round tiie A/ores; 48", N. 31" W.; 42' N. 51' W. 

 Aiifjti.^t: across the xVtlantic, between 40' and 50' N., from 



49" N. 14' W. to 42" N. 62" \V. 



Murray's & Whitting's data used. 



