35 



fg CLIX H JR. I--5 H. IS Callophyllis crispata Okam. S 1R 7 '" US, f 



! 5 IS /> 



Hypnea cervicornis J. Ag. 



Nom. Jap. ! Kadzuno-ibara. 



PL CLIX, Fig.6-9 ; PL, CLX, Fig. 1-5. 



Hypnea cervicornis J. Ag. Sp. Alg. II, p. 45 1 ; Id. Epicr. p. 564 ; De 

 Toni Syll. Alg. IV, p. 480. H. spinella Kg. Tab. Phyc. XVIII, t. 26. 



Fronds forming large, loosely intricated, globular or slightly 

 depressed mass, attaching at basal branches to gravels, stones, 

 shells etc. by disc like attachments, irregularly branched in divari- 

 cato-dichotomous manner. Branches protruding from general mass 

 branched in similar manner, here and there with pinnate segments 

 and densely loaded on all sides with minute or elongated, simple 

 or branched spinose ramelli, 3-5 or 10 mm long, which taper to 

 sharpish points from broader bases. Thicker branches measure 

 1.52.5 mm i n thickness, while slender ones are very fine. 

 Ramelli grow up into ramuli which gradually develop into branch- 

 es and there is no regularity. Branches are very patent with 

 rounded axlis, often almost horizontal, making in upper portion 

 the ramification like cervus-horns and gradually taper to a fine 

 point: They unite to each other by disc-like attachments forming 

 an inextricable mass, so that it is unable to disentangle branches 

 without breaking. Frond internally consists of large, almost emp- 

 ty, thin-walled cells and as consequence branches become very 

 much wrinkled when dried. Ramelli or ramuli bearing tetraspores 

 swell into fusiform or ovate segments a little above the base. 



