ÖPVERSIGT AF K. VETENSK.-AKAl). FÖRHANDLINGAR 1 900, N:0 8. 1)25 



heterocampta Jörgensen. Jkrgens Museums' Aarbog 1899 N. VI 

 PI. JI f. 11). This form, a cliaracteristic constituent of the 

 styli-plankton of the northern hemisphere, was found from 37' S. 

 23" W. to 43" S. 1 E., in almost all samples and, besides, at 

 40° S. 82^ E. and 36 S. 89° E. 



Ceratium (tripos var.) azoriciim Cl. (K. Sv. Vet. Akad. 

 Handl. XXXIY N. 1 p. 13 Pl. VII tig. 6, 7). This form was 

 found at 34 S. 29° W., from 41 S. 6° W. to 45° S. 32^ E. 

 and at 43^ S. 57= E., 43 S. 71° E. and 41° S. 80° E. 



C. (tripos var.) bncephalnm Cl. was inet with in one sample 

 only, viz. at 45° S. 26° E. 



Ceratium fusus Daj. This common species, exactly agreeing 

 with the form in the styli- and tripos-plankton of the northern 

 hemisphere, was met with in most samples from 

 38^ S. 20° W. to 40' S. 82° E., but sparingly. 



Ceratium lineatum Ehb. Sparingly in most 

 samples from 41° .S. 6° W. to 33° S. 90° E. 



var. robusta Cl. This form, remarkable for 

 itslarge size (length 0,045; breadth 0,017 m.m.), 

 may possibly be a new species. It occurred in 

 samples collected between 45° S. 29° E. and 43' S. 

 57° E. — Fig. 6. 



Ceratium macroceros Ehb., rare in samples 

 from 39° S. 17° W. and 39° S. 10° W. Fig. 6. Ceratium 



. lineatum v. robusta. 



C. tripos NiTZSCH, rare in samples from 250 t. m. 

 38° S. 20° W.; 44° S. 45° E.; 39 S. 85° E. and 36° S. 

 89° E. 



Dinophysis homunculus Stein. This species, very characteri- 

 stic for the styli-plankton of the temperate Atlantic in the 

 northern hemisphere was found, not rarely, in almost all samples 

 from 37° S. 23° W. to 44° S. 4° E. and, besides, at 41 S. 80° E. 



Dinophysis truncata Cl. N. Sp. This species, remarkable 

 for thé truncate inferior end, occurred sparingly from 38° S. 

 20° W. to 43° S. 1° E. and at 45° S. 29°— 32° E. It seems 

 to beiong to the antarctic styli-plankton. — Fig. 7. 



