KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 35. N:0 7. 27 



—August: N. of Scotland r; sparingly in the area between 57°— 58°N. 4° E., 55° N. 6° E. 

 and 58° N. 11° E.; M. r, V. r. November: central North Sea r, Vinga (80 in.) r, M. rr. 

 December: r. 



Xauthidium bracliiolatiim Möb. — November: Sk. r. 



X. hystrix Cl. — Jarmary: Vinga r. February: 57° N. 7° E. rr. May and June: 

 M. r. July: V. r. October: V. ?t. November: 57° N. 7° E. and Sk. r. December : N . rr. 



X. raultispinosum Möb. — January: Vinga ;•. March: 56°38'N. 12° 16' E. r. April: 

 W. of Jutland. July — August: r in some spöts N. of Scotland and W. of the mouth of 

 the Scheldt. November: rare in the central North Sea and on the banks W. of Jutland. 



Flagelliitae. 



Dinobryum pelliicidum Lkvandeh. — Åiml: r in the Skagerak and at M. and V. 

 May: V. ■/■. June: the Shetlands r. 



Phseocystis Poiichetii Lagii. — Marek: r at 56°33'N. 12° 16' E., not rare at M. 

 April: r above the 50-metre plateau of the bottom of the North Sea, in the Skagerak 

 and at M. November: Sk. r, Vinga (30 lu.) rr. 



Cyanophyceas. 



Aplianizomenou ilos aquaj (L) Rlfs. — January: Vinga -j-. 



Diatoiiiciceae. 



Actinocyclus Ralfsii W. Sm. — October: V. rr. 



Asterionella japonica Cl. — April: rare at 55° N. 8° E. November: off the Dutch 

 coast rr; N. of Jutland rr. 



Bacteriastrum varians Lauder. — October: V. rr. November: from Holland to Sk. 



Bellerochea mallens Btw. — February: mouth of the Scheldt rr. July — August: W. 

 of the Limfjord. November: Sk. rr. 



Biddiilphia aurita Lyngb. — January: the central Skagerak, Vinga and V. r. Febru- 

 ary: W. of the Danish Peninsula /■; M. r. March: Vinga; M. not rare. April: sparingly 

 along the western coast of Denmark. November : M. rr; V. -f- r. December: V. r. 



B. mobilensis Bail. — January: central Skagerak r. February: W. of Scotland; E. 

 of Scotland; above the edge of the Fisher Bank. October: M. r, V -|- r. November: 

 from Holland to Sk.; Vinga (30 m.) r; M. rr; V. -\- r. December: V. rr. 



