1911] Kofoid: The Genus Gon>jauIax. 229 



Dimensions: Length, 29 to 39/x; transdiameter, 27 to 34/i; 

 dorsoventral diameter the same; width of girdle, 4 to 5//,. 



Variation : Varies in surface markings and in girdle dis- 

 placement and overhang as above stated. 



Comparisons : Its small size and peculiar markings combined 

 with its considerable displacement serve adequately to character- 

 ize this species. It might be easily confused when full of con- 

 tents with G. spinifera, in young stages with small spines, but is 

 more rotund with characteristic surface markings. It is also 

 somewhat similar to G. turhijnei but has greater displacement of 

 the girdle and much finer markings. 



Distribution : Found thus far mainly as empty thecae in 

 neritic summer plankton at San Pedro and San Diego, California. 



Named for Miss Ellen B. Scripps whose interest in marine 

 biology has made possible the foundation of the San Diego 

 Marine Biological Station. 



8. Gonyaulax polygramma Stein 



PI. 10, figs. 6, 7; pi. 17, fig. 47 



Protoperidinium pyrophorum Pouchet (1883), p. 433, pi. 18/19, fig. 

 15. In explanation of plates (p. 455) as P. prophorum. This is 

 not Peridiniuvi pyrophorum (also as Peridinium ? {Glenodinium ?) 

 pyrophorum in explanation of plates) of Ehrenberg (1836), p. 

 133, pi. 1, fig. 1, iv; (1854), p. 17, pi. 37, vii, figs. 3, 4. 



Gonyaulax polygramma Stein (1883), pi. 4, fig. 15. It is possible 

 that figs. 16 and 17 (= G. polygramma var. Stein ^ G. steini 

 Lemmermann 1907) represent another and indeterminable species. 



G. polygramma Stein var. Schiitt (1895), fig. 33 1.3. 



G. polygramma Stein var. Schiitt (1895), fig. 33 1.3. 



G. polygramma, Delage et Herouard (1896), p. 383, fig. 662. 



Peridinium pyrophorum, Lemmermann (1889), p. 369. "Ob zu Gony- 

 aulax gehorend!" 



Gonyaulax Schueitii Lemmermann (1899), p. 367, based on Schiitt 

 (1895), pi. 8, fig. 33. 



G. polygramma, Eiitz (1905), pp. 110, 138-142, figs. 58-59; (1907), 

 pp. 11-22, pi. 3, figs. 1-3, 5-6; (]909), pp. 247-260, pis. 9, figs. 

 1-3, 5-6. 



G. polygramma, Paulsen (1907), pp. 7-8, fig. 7; (1908), pp. 28-29, 

 fig. 36. 



G. polygramma, Okamura (1907), p. 132, pi. 13, figs. 13a-d. 



Diagnosis : A medium-sized species of slightly elongated 

 form, symmetrically rounded hypotheca, girdle displaced poste- 

 riorly a little more than its width, narrow ventral apical, spread- 



