- 6 4 - 



spores are collected in linear or linear oblong sori. Carpogonial 

 branches and auxiliary cells are formed at the base of the cortical 

 filaments which descend below into the cavity produced in the 

 subcortical layer. Auxiliary cells are single and conical in shape 

 and are abundantly prepared. Filamentous tissue surrounding the 

 neucleus is weakly developed. Colour vinoso-purple. Substance 

 cartilaginous and almost horny when dried. Plant does not adhere 

 to paper in drying. 



Affinities : Allied to Grat. divaricata Okam., *but more carti- 

 laginous in the substance and the plant in question is the firmest oi 

 the genus as is known at present. 



PL. CXVIII. Fig. 1 : frond of Grateloupia cornea Okam. n. 

 sp.) i- Fig. 2 : portion of the frond showing proliferous ramuli, \. 

 Fig. 3 : portion of the cross-section of frond, & ~-. Fig. 4 : 

 terminal segments bearing tetrasporic sori, s, \. Fig. 5 : tetra- 

 spores, s ~. Fig. 6 : cystocarpic ramuli, i. Fig. 7 : cross-section 

 of a tetrasporic ramulus, ^. Fig. 8 : cross-section of a cystocarpic 

 ramulus, ? *. Fig. 9 : cystocarp, -p. Fig. 10 : carpogonial branch, 

 ^ 5 . Fig. 11 : auxiliary cell, which is represented with contents, 



890 



i 



Grateloupia cornea Okam. ff?ffl. 



1 <D tf fr T?. 



g5 cxviii m JR. 



y X - m * & * - & > m m 

 y. ju ^ i- * m ^ * * ^ * 



