KOFOID AND SWEZY: UNARMORED DINOPLAGELLATA 173 



In addition to these forty-one valid species above eniunerated we consider 

 that the following must be placed in the list of incertae sedis for lack of sufficient 

 data: 



G. affine Dogiel (1906). 



G. corpusculum (Perty) Saville-Kent (1880-82) (^Peridinium corpusculum Perty and 



Proaulax corpusculum (Perty) Diesing. 

 G. gracile var. cxiguum Pouehet (1883). 

 G. glaciale Danysz (1886). 

 G. inerme (Perty) Saville-Kent (1880-82) {= Peridinium inerme Sehmarda 1854 and 



Heteraulax incrmis (Sehmarda) Diesing (1866) as a synonym of G. monadicum) . 

 G. lachmanni, Saville-Kent (1880-82) {^= Peridinium sp. Claparede and Lachmann). 

 G. lohynanni Paulsen (1908) (=G. roscum, Lohmann, 1908), pi. 17, fig. 25. His figures 



26-28 of the same plate are evidently Gyrodinium. 

 G. monadicum (Perty) Saville-Kent (1880-82) {^Peridinium monadicum Perty, 1852). 

 G. monas (Ehrcnberg'i Saville-Kent (1880-82), cited by Kent as possibly the same as G. 



marinum. Indeterminable. 

 G. paradoxum, var. major (Lemm.) West and West (1906). May be G. paradoxum. 

 G. rete Schiitt (1895). May be Hcmidinium. 

 G. simplex (Lohmann) 1908 (^ Protodinium simplex). 

 G. tintinnicola Lohmann (1908). 

 G. triangularis Lebour (1917&). 



The following are placed in the list of nomina nuda: 



G. asymmetricum Massart (1901). 



G. cruciatum Masisart (1901). 



G. polyphcmus var. magna Dogiel (1906). 



G. minutissimum Massart (1901). 



G. vorax Massart (1901). 



The following species, included at some time heretofore in Gymnodinium, 

 have been transferred by others or are l)y us here transferred to other genera : 



G. spirale var. acuta Schiitt (1895) to Gyrodinium uoiu. gen. nov. by us in this paper as 

 G. acutum. 



G. archimedes Pouehet (1883) to Cochlodiniion by Lemmermann (1899). 



G. hicaudatum Pavillard (1905) to Heterodinium hicaudatum (Pavillard) by us in this 

 paper. 



G. constrictum Schiitt (1895) to Cuclilodinium by Lemmermann (1899). 



G. contortum Schiitt (1895) to Gyrodinium nom. gen. nov. by us in this paper. 



G. cornutum Schiitt (1895) to Gyrodinium nom. gen. nov. by us in this paper. 



G. spirale var. carnutum Pouehet (1885a) to Gyrodinium nom. gen. nov. by us as G. cor- 

 nutum in this paper. 



G. crassum Pouehet (1885a) to Gyrodinium nom. gen. nov. bj' us in this paper. 



G. fissum Levander (1894) to Gyrodinium nom. gen. nov. by us in this paper. 



G. fucorum Kiister (1908) to Gyrodinium nom. gen. nov. by us in this paper. 



G. geminatum Schiitt (1895) to Coclilodinium bj' Lemmermann (1899). 



G. helix Pouehet (1887) to Coclilodinium by Lemmermann (1899). 



G. hyalinum Schilling (1891a) to Gyrodinium. nom. gen. nov. by us in this paper. 



G. spirale var. mitra Schiitt (1895) to Gyrodinium nom. gen. nov. by us in this paper as 

 G. mitra. 



