ICONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 36. N:0 8. 41 



Peridiuium pelliieitlura Bergii. — 1901 Janiiary, V. oro. M. ro. Fehruary, Novw. 

 63°— 64° K 0°— 5°E. +, 68° N. 13°— 14° E., 70° N. 'lO°E. +. MmrA, Norw. 71°— 74° N. 

 19°_24°E. c to r. April, V. roo. Norw. 69° N. 14°— 18° E. +. May, V. orr. Atl. 

 area 61° N. 5° E., 63° N. 2° W. and 68° N. 13° E., more common in the east. Jtme, M. 

 or. August, E. of Firth of Forth, S.E. of the Dogger bank, mouth of the Elbe, Skagen, 

 everywhere extremely rare. November, V. roo. 



1902 Fehruary, from 58° N. 3° E. and 56° N. 1° W. to S. Norway and S. Jutland. 

 March, M. oor. May, Orkneys r. Area between 57° N. 0° P]., Skagen and W. of Sylt, 

 sparingly. M. rro. July, M. 9'r?v — T (Ns). 



Peridiniiim pentagonum Gran. — 1901 May, Norw. 61° N. 4° E. +, 68° N. 8°— 13° 

 E. r +. 



Gran's data. I have not distingnished this form, which I do not coiisider to be 

 fullgrown. 



Peridimum Steinii Jöegensen. — 1901 Febrimry, Norw. 63° N. 2° — 4° E. r. May, 



Norw. 61° N. 5°E. +, 68° N. 13° E. r. August, rare E. of Scotland and W. of Denmark, 

 in the central ond north Skagerak. 



1902 February at 58° N. 0° E. and N. of Jutland r. April, V. oor. July, M. 

 ror. — S. 



Podolampas palmipes Stein. — 1901 February, Norw. 64° N. 1° E. r. — S (sou- 

 thern species). 



Prorocentrum inicans Eiirenberg. — 1901 September, Y. r. M. roo. November, W. 

 and N. of Jutland r, S. of Norway r. V. roo. 



1902 February, sparingly at the Orkneys, Firth of Forth and W. of Jutland. May, 

 V. oro. — Litoral. 



Protoceratium aceros Bergii. — 1901 May, V. oro. August, central and north 

 Skagerak. M. always sparingly. 



1902 May, sparingly in the area 57°— 58° N. 8° E. M. rro. — Tp. 



If this species be identical with Peridimum reticulatum Claparede and Lachman 

 (1868), the specitic name may be F. reticulatum. Claparede and Lachman (non Stein, 

 non Schutt). Bergh's species is of 1882. 



Pyropliacus horologium Stein. — 1901 August, sparingly E. of the Orknej^s, be- 

 tween Scotland and S. Norway and froin Holland to the east of Dogger bank. Skagen r. 

 From Koster to M. •;■. September, V. r. M. roo. October, V. oro. November, area be- 

 tween Newcastle, S. Norway and Skagen r, W. of Denmark. V. rro. December, Nh. r; 



1902 Fehruary, sparingly in the area between 58° N. 0° E., S. Norway, W. Denmark 

 and 56° N. 1° W. i/m/, 56° N. 7°31'E. r. M. oor. July, M. roo. — S, Tp. 



K. St. Vet. Akud. Handl. Band 30. N:o 8. 6 



