SOME LITTORAL DIATOMS OF JAPAN. 



15 



Fig. 16 : Rhizosolenia Stolterfothii Perag. 



a : portion of spiral chain. 4- x B, Zeiss. 

 b : part of the same ; 15 /j. in diameter. 4 X D, Zeiss. 

 c : two other cells. 4 x D, Zeiss. 

 Fig. 17 : Rhizosolenia cylindrus Cleve including Richelia intercellularis 



Schmidt. 4 x D, Zeiss. 

 Fig. 18, a: two cells of Rhizosolenia robusta Norman. 4xA, Zeiss. 



b : part of the same. 2 x D, Zeiss. 

 Fig. 19, a: portion of Rhizosolenia amputata Ostf. 4 x A, Zeiss. 



b : apical portion of the same. 5 x E, Zeiss. 

 Fig. 20, a, b, c : different views of apical portions of three individuals 



of Rhizosoleni Clevei Ostf. 2 x D, Zeiss. 

 Fig. 21 : portion of Rhizosolenia Shrubsolei Cleve. 4 x E, Zeiss. 

 Fig. 22 : Rhizosolenia setigera Brightw. 4 x D, Zeiss. 

 Fig. 26, a : Rhizosolenia hebetata Bail f. semisplna (Hensen) Gran. 

 4xA, Zeiss. 

 b, c: both apices of the same. 4 x D, Zeiss. 

 Fig. 27, a : Rhizosolenia alata Brightw. 5 x A, Zeiss. 

 b : apical portion of the same. 5 x E, Zeiss. 

 c : median portion of the same showing squamae. 



5 x E, Zeiss. 

 d : abnormal form. 4 x B, Zeiss. 

 e : apical portion of the same. 4 x D, Zeiss. 



Plate X. 



Fig. 23, a: Rhizosolenia styliformis Brightw. 4 x E, Zeiss. 



b : var. latissima Brightw. 4 x A, Zeiss. 



c : part of the same as fig. b. 4 x D, Zeiss. 



d : another cell of var. latissima Brightw. 4 x A, Zeiss. 



e : part of the same as fig. d. 4 X D, Zeiss. 



Fig. 24. a : cell of Rhizosolenia calcar avis Schultze. 4 x A, Zeiss. 



b : part of the same. 4 x D, Zeiss. 

 Fig. 25 : Rhizosolenia cochlea Brun. 4 x D, Zeiss. 

 Fig. 28 : Bacteriastrum hyalinum Lauder ? 4x D, Zeiss. 



Fig. 29, a-e : Bacteriastrum varians Lauder. 



a : partion of a chain. 4 x D, Zeiss. 



h : terminal spines of another specimen 4xE, Zeiss. 



c : terminal spines of still another specimen. 4 X E, Zeiss. 



