40 P. T. CLEVE, PLANKTON-KESÉARCIIES. 



Peridinium divergens Ehrenberg. — ■ 1901 Januari/, V. rrr. Fehruary, Norw. 63° 

 — G4^N. 0°— 5°E. + c; 68° N. 13°— 14° E. +; 69°— 70° N. 10°— 17°E. +. kar c/j, Norw. 

 71°— 74°N. 19°— 24°E. c to ;■. May, V. oro. Norw. 61°N. 3°— 5° E. c to +, 62° N. 

 1°E. + and 68° N. 6°— 13°E. r to c. June, M. r. Jtdy, M. ror. August, not rave from 

 the Scheldt to Skagen, sparingly W. of Scotland and froin the Orkneys to S. Norway 

 nnd the Dogger bank. Whole Skagerak c to r. September, V. r. M. c + +. October, 

 V. r + r. November, sparingly between the Orkneys, Skagen, W. Schleswig and New- 

 castle. V. rr +. M. r. December, V. + + o. M. r + o. R.Sg. +. Nh. +. 



1902 Janunry, V. r. M. r. February, sparingly in the whole North Sea and along 

 the west coast of Sweden. May, rare W. of Sylt and N. of Jutland. V. rr +. June, 

 M. r. V. r + r. July, M. rr +. V. ror. — S. Tp. 



Peridinium globulus Stein. — 1901 February, Norw. 63°— 64° N. 0°— 5° E. r. 

 1902 February, central North Sea and off the coast of Holland r. — S, {Tp). 



Peridinium oceanicum Vaniiöffen. — 1901 January, V. roo. Fehruary, Norw, 63° 

 — 64°N. 0°— 5°E. r. Mnrch, Norw. 71°— 73° N. 21°-24° E. r. May, V. oor. July,M. 

 oro. August, common along the coast of Holland, sparingly off the mouth of the Elbe, 

 W. of Denmark and S. of Norway. Skagerak, not rare at 58°50'N. 10°15'E., rare at 

 f)8°20'N. 10°5'E. September, V. r. M. roo. October, V. orr. November, W. of Den- 

 ma,rk r. V. orr. December, V. rro. R.Sg. r. ' . - 



1902 July, M. r ++. — 8, Tp. 



Peridinium ovatum Pouchet. — 1901 February, Norw. 63°— 70° N. 1°— 6° to 16° 

 — 10°E. +. Marek, Norw. 71°— 73°N. 19°— 24°E. r. April, V. r + o. U. oro. Norw. 

 69° N. 14°— 18°E. r. May, V. oro. M. rro. Norw. 61° N. 5°— 4° E. c to r, 62° N. 1° E. 

 + and 68° N. 8°— 13°E. + c. June, M. ro. August, abundant east of Firth of Forth. 

 November, Firth of Forth r, W. of Jutland r. V. oro. December, V. roo. 



1902 January, M. r. February, from 55° N. 0°E. to S. Norway and W. Jutland r. 

 April, V. oro. May, W. and N. of Scotland, area between Firth of Forth, W. of Sylt, 

 Skagen and S.W. Norway, as a rule sparingly. Off" the coast of Holland, 55° N. 4°35' E. 

 rare. M. roo. — T. {Ns). 



Peridinium pallidum Ostenfeld. — 1901 January, M. ro. March, M. r. April, 

 V. rro. M. orr. May, V. roo. M. + ro. June, M. + r. August, r E. of Firth of 

 Forth and S. of Norway, in the central and north Skagerak. September, M. roo. October, 

 V. oro. M. oor. November, W. and N. of Jutland, ?•. V. roo. M. r. December, V. roo. 

 M. rro. R.Sg. r. 



1902 January, M. r. February, N. of Jutland r. Central Gullinarfjord r. Aiwil, 

 M. r +. V. oor. May, N.W. of Scotland. Area between 57° N. 2°— 8° E. and Skagen, 

 as a rule sparingly. M. + ro. V. oro. July, M. rro. — T., Ns. 



This form is so nearly akin to P. pellue.ichm that it need scarcely be 

 distinguished. 



