KOFOID AND SWEZY: UNARMORED DINOFLAGELLATA 211 



Gymnodinium fuscum, Saville-Kent (1880-82), pp. 443, 463, pi. 25, figs. 17, 18. 



G. fuscum, BcTgh (1881&), p. 191. 



G. ficscunu Klebs (1883), pp. 348, 351, 352, pi. 2, fig. 25 (in part, liis figure is evidently 



a Hemidinium) ; (1884), p. 739; (1912), pp. 391, 421. 

 G. fuscum, Pouehet (1883), pp. 402, 445. 

 Peridinium fuscum, Griffith (1883), p. 587. 

 Gymnodinium. fuscum, Biitschli (1885), pp. 925, 964, 986. 

 G. fuscum., Gadeau (1890), p. 30. 

 G. fuscum.. Schilling (1891), pp. 248, 275, pi. 10, fig. 9 ; (1913), p. 15, fig. 10. After Stein 



(1883). 

 G. fuscum Levander (1894), p. 43; (1900), p. 7; (1900), pp. 14, 29, 99. 

 G. /uscwm, Zaeharias (1895), p. 134; (1896), pp. 37, 38, 51 ; (1896), p. 78; (1898a), p. 27; 



(18986), p. 714; (1898c), pp. 95, 109; (1903), pp. 237, 244. 

 G. fuscum, Schiitt (1895), p. 9; (1896), p. 5, fig. 5a. After Stein (1883). 

 G. fuscum, Entz (1896), p. 22. 



G. fuscum, Apstein (1896), pp. 119, 120, 121. 131, 152, 153, fig. 53, tables 1-3. 

 G fuscum, Lemmermann (1896), p. 94; (1900), p. 115; (1902), p. 260; (1903), pp. 118, 



120, 123, 149; (1910), pp. 613, figs. 10, 11, pp. 618, 620. After Stein. 

 G. fuscum, Ludwig (1898), p. 5. 

 G. fuscum, Mez (1898), p. 216. 

 G. fuscum, Schroder (1898), p. 14. 

 G. fuscum, Iwanoff (1900), p. 140. 

 G. fuscum, Aniberg (1900), p. 83. 

 G. fuscum, Huitfeldt-Kass (1900), p. 3. 

 G. fuscum, Lagerheim (1900), p. 22. 

 G. fuscum, Zschokke (1900), p. 345. 

 G. fuscum, Schonichen and Kalberlah (1900), p. 232, pi. 2, fig. 3; (1909), p. 252, pi. 8, 



fig. 3. 

 G. fuscum, Wesenberg-Liuid (1904), pp. 106, 107, 112, tables 1-9. 

 G. fuscum, Bachmaun (1907), p. 36. 

 G. fuscum, Karsten (1907), p. 466. 

 G. fuscum, Ostenfeld (1907), p. 390. 

 G. fuscum, Seligo (1907), p. 96, fig. 133. 



G. fuscum,, Doflein (1909), p. 521, fig. 462 A; (1911), p. 527, fig. 462 A. 

 G. fuscum, Senn (1911), p. 623. 

 G. fuscum, France (1912), p. 28. 

 Peridinium fuscum, Chatton (1912), p. 86. 

 Gymnodinium fuscum, Laiiterborn (1913), p. 868. 

 G. fuscum, Cunha (1913), p. 105. 



Diagnosis. — A medium sized spceies with ovoidal l)ody, slio-htly flattened 

 dorsoventrally, its length 1.5 transdiameters ; girdle without displacement; 

 sulcus extending from girdle to antapex ; color yellow brown. Length, 88/^. In 

 fresh-water swamps in central Europe. 



Description. — The hotly is stout ovoidal, widest at the middle, slightly narrower posteriorly, 

 its length about 1.5 transdiameters and its dorsoventral diameter 0.33 of its transdiaraeter. The 

 epieone and hypoconc are subequal. The epieone has a length of about 0.45 of the total length 

 of the body. It is high dome-shaped with broad ajiex and symmetrically rounded sides. The 

 hypoconc is usually somcwliat narrowi-r tliau the epieone and tapers posteriorly to the pointed 

 antapex. 



