ÖFVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 19<)U, N:0 J). 1031 



By the above naine 1 denote a charactoristic forin, allied 

 to D. homunculus. The annexed figure makes the description 

 superfluous. 



Fig. 1. Dinophysis miles, 250 t. m. 

 a. from the Red Sea; b. from the Malay Archipelago. 



ExuTiella compressa (Bail.). — 19° N. 39^ E. — Arabian 

 Sea, Indian Ocean, tropical and subtropical Atlantic. 



Ooniodoma acuminatum (Ehb.). — 16"— 22' N. 41° — 37 E. 



— Arabian Sea, Indian Ocean, tropical and subtropical Atlantic. 



Histioneis niag-niflciis (STEIN). — 13° — 16 N. 43° — 41° E. 



— Arabian Sea, Indian Ocean, whole tropical Atlantic. 



Peridinium divergens Ehb. (typus). — 22" N. 37° E. — 

 Arabian Sea, Indian Ocean, whole tropical and temperate At- 

 lantic. 



P. globulus Stein. — 13°— 19° N. 43°— 41° E. — Arabian 

 Sea, Indian Ocean, tropical and temperate Atlantic. 



P. oceanicuin Vanhöffen. — 13° — 22° N. 43°— 37° E. — 

 Arabian Sea, Indian Ocean, whole Atlantic. 



Phalacroma dor j phorum Stein. — 27° N. 34° E. — Arabian 

 Sea, Indian Ocean, tropical Atlantic. 



Podolampas palniipes Stein. — 16° N. 41° E. — Arabian 

 Sea, Indian Ocean, tropical and subtropical (rare in the tem- 

 perate) Atlantic. 



Pyropliacus liorologinm Stein. — 9° N. 59° E. — Arabian 

 Sea, Indian Ocean, whole Atlantic. 



