THE BOTANM AL MAGAZINE. LVo i. xxi. No. 244. 



The distinctions between Ch. Kalfsii and Ch. afhne are found, 

 besides the difference just stated above, in the length of cells 

 and hoops and in the curvature of remaining horns. In Ch. 

 nlimc hoops are very narrow and constricted while in Ch. Ralfsii 

 they are very wide with often insignificant constriction and 

 cells are shorter in the former, while much longer in the latter. 

 Horns, again, are straight in the former while in the latter they 

 are much curved ; and the horns of Ch. Ralfsii are seen to lie 

 on one and same plane as viewed from the broader girdle surface. 

 The terminal horns of Ch. afhne are usually very widel}- parted 

 but are not without the ease when they are put in somewhat 

 acute angle as is shown in Cleve's figure as well as in our Fig. 

 6. Thus, if Schroder's illustration really represents Ch. Ralfsii 

 and my comparative study is correct, we might conclude that 

 Cleve has described a form of Ch. affine under the name of Ch. 

 Ralfsii and then Schroder's Ch. Ralfsii must stand as that species 

 which has been truly represented for the first time. 



Length and breadth of cells shown in the figure measure 

 26 f* and 10 ft repectively. 



20. C. paradoxum Cleve. PL III, Figs. 12-15. 

 Cleve Java, 1873, p. 10, PL III, Fig. 16 a ; Ostf., Faroes, 



11)03, p. 573. 



Loc. in Jap. : Cape Goza in Prov. Shima (Aug., 1904). 



The specimens figured measure: in Fig. 12, thickness = 12//; 

 in Fig. 14, breadth and thickness 26// and 17// respectively; 

 in Fig. 15, breadth = 17-20 //. 



Section 9. Lacinosa Ostf. 



21. C. distans Cleve. PL IV, Figs. 40-43. 

 Cleve, Java, 1S73. p. 9, PL II, Fig. 11 ; Ostf. Faroes, 1903, 



p. 574; Ostf. Alar. PL Diat., 1902, p. 235, Fig. 13. 



As it is shown in Figs. 41 and 43 a, endocysts are not 

 formed in the middle portion of the mother cell, but the primary 

 valve of an endocyst is more distant from the valve of the 

 mother cell facing to it, than the secondary valve is from the 

 remaining one of the latter. The primary valve of the endocyst 



