396 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



Halymenia pinnulata Ag., Aufzählung etc' (Flora X, 1827, p. 645). 

 Chrysymenia pinnulata J. Ag., Alg. Mediter., p. 106; Spec. Alg., II, 

 p. 212; Epicr., p. 323. Zanardini, Iconogr. Adriat., I, p. 151, pi. 36 A. 



The wall of this rather large plant consists of several cell- 

 layers; innermost, towards the cavity in the interior of the frond, 

 the cells are large, becoming smaller outwards (Fig, 378 B). The 

 cortical layer consists of larger cells innermost, smaller at the 

 periphery; it is beautifully figured by Kuckuck (1. c, 

 p. 219, pi. XIII, fig. 17) who, on the other hand, found the 

 cortical layer composed of short monihform filaments consisting 

 of small roundish cells. This was not so marked in the West Indian 

 specimens except in the tetrasporic plant. 



Here and there, on the innerside of the large cells facing the 



cavity in the interior of the thallus, a single one of these cells or 



a few consecutive ones bear glands (Fig. 378 A). These glands 



are as a rule placed immediately upon the membrane of the large 



cells, more rarely I have found a few of the glands placed upon 



a small roundish cell while the remaining glands were placed 



immediately upon the wall of the large cell. In specimens from 



the Mediterranean Sea Kuckuck mentions that he also' now 



^.^,^ and then has found such a small cell 



^^qÆ^ between the gland cell and the large 



9?§MS^^^^o ^^" (compare his fig. 19, pi. XIII). 



goTO qlj^qOq ^j^^ ,^^^^ g^^^ 'Awdijs tobe soH- 



O^nO^^^^^oOoOo,;®^ tary, but several occur on each cell. 



):§ On^^Afx^oSo^'^o o ^^^ ^^^^^^ ^^^ oblong-roundish when 



goOSo^®Oo-^VoO seen from the side (Fig. 378 5). 

 ^°0O g^^ O^l^^^ Further, in the older part of the 



C^Q^^'^d^O%^''ol°^^mo^^^ thallus (comp, my remarks 1. c, 



^ (Ä^ooOqOoö ■ p. 181) we find hyphæ-hke filaments 



^^^^ooo'^ growing out trom the innerside oi 



r^. o^o /-?. •. , • the large wall cells (Fig. 378 C). 



Fig. 379. Chrysymenia véntncosa & \ & / 



(Lamour.) J. Ag. These filaments are irregularly bent, 



Tetrasporangia^in_ the cortical ^^^^^ ^^^^^^^ -^ ^^^^^ lowermost 



part, nearly cylindrical in their up- 

 per part consisting of cells about 16 /j. thick and 6—12 times as 

 long. The filaments are now and then ramified, Kuckuck has 

 found similar hyphæ in the Mediterranean plant. A few times 

 small nearly globular glands occurred upon the filamemts. 



