46 
Transactions of the Eoyal 8 octet y of South Africa. 
f. fuelJebornei (Sclimidle), G. S. West, Joiivn. Linn. Soc, Bot., xxxviii, 
1907, p. 106. (Sjn. : S. fuellehornei, Sclimidle, Engier's Bot. Jahrb., xxxii, 
1902, p. 76, Tab. Ill, fio-. 2). 
Sample 85. 
The specimens in this sample resembled Schmidle's form, particularly as 
regards the zygospores, which had markedly pointed ends and a yellowish- 
brown membrane ; the dimensions were, however, rather less (lat. zygosp., 
32-33 iw; long, zygosp., 50-60 ^u), although exhibiting the same relative 
proportion between length and breadth. The vegetative filaments were 
41-42 wide, the cells being three to six times as long as broad, and provided 
with three chloroplasts describing from one and a-hal£ to two turns. The 
spiral bands were much broader than in Schmidle's specimens (loc. ext., 
fig. 2, a), but it may be questioned whether too much stress can be laid on the 
width of the chloroplasts, which may well vary with local conditions of 
nutrition. 
Sclimidle compares his 8. f uellehornei with ^S". neglecta (Hass.), Kuetz., a 
much wider species, with slightly inflated fructifying cells and zygospores 
with rounded ends. G. S. West {loc. cit.) regards it as a tropical form of 
8. clecimina, Kuetz., a view which finds further support in the specimens 
just described which seem to link up ^S*. fuellehornei with the typical 8. deci- 
mina. Nevertheless it will be well for the present to maintain the form 
fuellehornei, as distinguished by the possession of three chloroplasts (always ?) 
by the very pointed ends of the zygospores, and by the slightly different 
dimensions. 
var. inflata, F. E. Fritsch, nov. var. (Fig. 20). 
Var. cellulis vegetativis latioribus et diametro vulgo 2-4-plo longioribus, 
chromatoplioris 2 anfractibus 1-^-2. Zygosporis aut fere globosis aut plus 
minus oblongo-ellipticis, apicibus late rotundatis raro subacutis, cellulas 
sporiferas non vel fere complentibus. Membrana zygosporae crassa laevis 
hvalina vel plus minus fusca- Cellulae fructiferae non inllatae, saepe 
breviores quam cellulas vegetativas. Cellulae filorum masculorum et (?) 
feminarum quae non conjugant semper magis infiatae. 
Lat. cell, veg., 48-52 /x ; long. cell, veg., 81-180 /x; lat. cell, non conjug., 
69-75; lat. X long, zygosp., 49 x 75, 54 x 81, 54 x 66, 52 x 49, 51 x 87, 
55 X 57, 51 X 100 /X. 
Sample 316 (common). 
This variety is considerably larger than the type, but it is especially 
distinguished by the fact that the zygospores usually have broadly rounded 
and not pointed ends and that the non-conjugating cells in conjugating 
threads are markedly inflated. This inflation has been observed more 
particularly in the male filaments (Fig. 20, A, B), but it would also 
appear to occur occasionally in the female (c/. Fig. 20, I). The filaments 
containing zygospores had, however, mostly dissociated into the individual 
