580 



III. PYROPHACUS Stein, 1883. 



64. P. horologicum Stein, 1. c. PI. 24, figs. 1—13. 



Very rare, only a few specimens occurred in hvo samples (Decem- 

 ber 1900, March 1901). Temperate, oceanie speeies. 



IV. PODOLAMPAS Stein, 1883. 



65. P. palmipes Stein, 1. c. PI. 8, figs. 9— 11. 



A single specimen was inet with in March 1901. Temperate, oceanie 



species. 



V. GONYAULAX Diesing, 1866. 



66. G. polygramma Stein, I. c, PI. 4, lig. 15, non ligs. 16 — 17. 



A single specimen was found in July 1900. Temperate, oceanie 

 species the small size of which prevents its being caught in the net. 



67. G. spinifera (Clap. & Lachm.) Diesing, 1. c. 

 Boreal, neritic species, found once only (June 1900). 



68. G. polyedra Stein, 1. c. PI. 4, figs. 7—9. 

 Neritic species, found once only (March 1897). 



VI. DIPLOPSALIS Bergh., 1881. 



69. D. lenticula Bergh., Morpholog. Jahrb., VII, 2, 1881, p. 244, 



figs. 60-62. 



Temperate, oceanie species, found rather sparingly in March, April, 

 July and August; in the samples of 1897 — 1898 not distinguished from 

 Peridinium ovalum (Pouch.) Schiitt. [See tables. J 



VII. PERIDINIUM Ehbg., 1832. 



The knowledge of this genus has much advanced thorough the 

 researches of Jorgensen (1. c.) and Gran (Das Plankton des Nor- 

 weg. Nordmeeres), but even then its species and their affinities re- 

 quire further cxamination. 



Subgen. 1, PROTOPERIDINIUM (Bergh) Gran. 



70. P. ovatum (Pouch.) Schutt, Die Peridineen d. Plankton- 



Expedition, I, Kiel & Leipzig 1895, PI. 16, lig. 49; Protoperidinium 



ovatum Pouchet, Journ. de l'Anat. el de la Physiologie, 19, 1883, 



PI. 20—21, fig. 13. 



Not rare around the Færoes, found during most of the months, hul 

 in the years 1897 1898 not distinguished from Diplopsalis lenticula Bergh 

 Boreal, oceanie species. See tables.] 



