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Atkinson . — Af Monograph of the 
growing from old ones, to be a parasitic Chantransia , which is 
very common sometimes on all Lemaneaceae . 
Bornemann 1 observed the germination of the spores in a 
species of the subgenus Sacheria. The germ-tube, according 
to his account, produces cellular elements, thus agreeing with 
my own observation in this subgenus. 
2. Development of the Protonema . A. Prostrate form . 
Thus far the study of the prostrate form and its development 
from the spores has furnished us with certain characters more 
or less common for each subgenus. There yet remains a 
study of its growth and development from other sources than 
from the spores. 
Suhgenus Sacheria . The cellular prostrate form character- 
istic of this subgenus is multiplied in one way by growth and 
budding of its own elements. It is also developed from the 
Chantransia- form in the following ways. After the Chan- 
transia-ioxm is well under growth, its basal cells develop 
slender rhizoids from the side of their proximal end. These 
upon reaching the substratum, or encountering some resistance, 
or probably in many cases in the absence of either alternative, 
begin to bud off short cells as branches from the terminal 
cell. Each one of these short cells begins to bud in several 
directions and produces other short oval cells. Finally, the 
pressure of the mass renders them polyhedral. Fig. 8 a re- 
presents clusters of these cells developed from rhizoids which 
have arisen from a short fertile branch c of the main axis e of 
the Chantransia-i orm. The rhizoid b coming from the first 
cell of the branch c has grown downward and developed 
serially three elongated cells. The first cell is quite slender ; 
the second one is larger at the lower end, and the third one is 
considerably shorter. From the side of the last cell three of 
the characteristic cells have grown, and one from the end. 
Each of these cells now grows and by budding produces other 
similar cells, sometimes two or three, so that a firm mass of 
cellular tissue is developed at the end of the rhizoid. The 
Beitrage z. Kenntniss d. Lemaneaceen, p. 4, 1887. 
