РАСНУМЕХТА 178 
Of the algae previously described from South America the only 
one, so far as the present writer can determine, that might be 
suspected of identity with Coker’s 09642 is Schizymenia Binderi 
J. Ag.* from Valparaiso, but this is described as having the struc- 
ture of Schizymenia and was kept in the genus Schizymenia by J. 
Agardh in the same volume] іп which he proposed the genus 
Pachymenia. Through the courtesy of Professor A. Voigt of the 
Botanische Staatsinstitute of Hamburg, we have been able to 
examine authentic material of Schizymenia Binderi from the 
Binder herbarium and find it to be a very different plant from our 
Pachymenia cuticulosa. This authentic material of 5. Binderi 
consists of two cystocarpic fragments, perhaps representing parts 
of a single individual. The narrower of these two fragments is 
37.5 cm. long and 9 cm. in maximum 
width, which is near the apex; the 
fragment is once furcate near the 
base, one of the segments being re- HE 9 
presented by а short stump from 4 9 9 СОС 
which the broader of the two frag- (СА 
ments may possibly have been de- 
tached; except for four or five short И 
lobes or proliferations near Ше base Па de secet 
and a few larger irregular lobes near part of cortex showing thick lami- 
apex, the margins are entire or erose- nated outer walls; B, the surface 
crenate. Тһе broader of the two frag- © RUE TUUM ке 
rom above; both fgures are en- 
ments is 34 cm. long and 14.5 cm. in d 687 dinineterk. 
maximum width, which is just below 
the artificially truncate apex; the thallus, as seen in sections soaked 
out in glycerine and па, appear to = 0. то 8 mm. thick. Тһе 
cortexis thicker and com ticlinal filaments 
than in Schizymenia Duby: but is only 55-80 u qo vs. 100-170 д 
іп Pachymenia cuticulosa; the anticlinal cortical filaments аге 5- 
10 cells long vs. 9-18 cells in P. cuticulosa; the outer walls of the 
superficial cells are only 1-3 и thick instead of finally 10-16 u. 
The cystocarps of S. Binderi are numerous, 80-170 и in diameter, 
ж 
ж Iridaea Binderi J. Ag.; Kütz. Sp. Alg. 727. 1849. Schizymenia Binderi J. Ав. 
Sp. Alg. 2: 174. 1851. 
tSp. Alg. 31: 124. 1876. 
