PLATE 15 



Fig. 33. Antapical view of liypotheea of Gonyaulax {Steiniclla) 

 fragilis (Schiitt), showing plates. San Pedro Harbor, California, May 31, 

 1901. X ca. 500. 



Fig. 34. Apical view of epitheca of same, showing plates, girdle, and 

 ventral area. Anterior plate, and plate 1' stippled. X ca. 500. 



Fig. 35. Oblique ventral view of Go)iyaulax pacifica Kofoid with 

 apicals parted. Seven miles WNW Point Loma, California, November 12, 

 1904. X 1000. 



Fig. 36. Dorsal view of theca of Gonymilax fragilis Schiitt, showing 

 plates. Same individual as figure 33. X ca. 500. 



Fig. 37. Ventral view of same, showing plates, except subdivisions of 

 intermediate region of ventral area. Girdle and ventral area stippled. 

 X ca. 500. 



ABBREVIATIONS 



1-6 — girdle series of plates. 1"" — antapical plate. 



l'~3' — apical series. cl. pi. — closing platelet of apex. 



l"-6" — precingular series. /?. po. — flagellar pore. 



l"'-6"' — postcingular series. int. pi. — intermediate plates of ven- 

 IP — posterior intercalary plate. tral area. 



ant. pi. — anterior plate of ventral 2>ost. pi. — posterior plate of same, 

 area. 



Figures drawn by Mrs. Josephine Rigden Miehener. 



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