90 
A New Saccharomycete 
produces one unicellular acicular spore. Parasite in the blood of invertebrates. 
Not yet cultivated. The genus comprises the following species: 
(1) M. bicuspidata (Metschnikoff 1884). Asci slightly narrowing at 
one end; spores pointed at both ends. Parasite in the body cavity of Daphnia 
magna (Crustacea) (Fig. I). 
(2) M. unicuspidata n. sp. Asci of elongated but regular form with the 
wall thickened at one pole. Spore pointed at one end, truncated at the 
other. Parasite in the body cavity of Ceratopogonid larvae: Dasyhelea obscura 
Winnertz. (Insecta: Diptera.) (Fig. II.) 
(3) M. sp. Yeast-like fungi found by Butschli (1876) in the coelom of a 
free-living nematode: Tylenchus pellicidus Bast. (Vermes.) 
(4) M. (?) sp. Yeast-like fungi of elongated shape found by Caullery 
and Mesnil (1899 and 1911) in a Polychaete worm Potamilla torelli, where 
they seem to produce a special kind of tumour (‘"neoformation papilloma- 
teuse”). They consider this yeast to be related to Monospora although they 
did not succeed in finding the spores. They also mention a similar yeast 
occurring in a pelagic Copepod Acartia. 
Family Schizosaccharomycetaceae. Endosporogenic, monocellular fungi, 
reproduce by fission which is preceded by the formation of a septum that 
at once commences to divide into two lamellae from outside. No budding , 
occurs. Spores unicellular of which 1—8 occur in each ascus. In some cases 
formation of asci is preceded by fusion. Spores stained blue by a solution of 
iodine in potassium iodide. The cells never contain glycogen (a contrast to 
Saccharomycetaceae). Produce alcoholic fermentation; one genus Schizo - j 
saccharomyces Lindner. 
Acknowledgment. 
I am much indebted to Professor G. H. F. Nuttall for valuable suggestions 
in connection with this study. 
APPENDIX. 
Concerning the re-naming of Metschnikoff s genus Monospora. 
According to Lafar (1910, p. 292), “the genus Monospora Metschnikoff 
ought really to be re-named, since this title has already been applied by 
Hochstetter, to one of the Flacourtiaceae.” 
This statement is correct. I would add that Hochstetter s name dates 
from 1841. However, in Warburg’s monograph of the Flacourtiaceae (H94, 
in Engler and Prantl’s Die naturlichen Pflanzenfamilien, Part hi, p. 37) I find 
that the name Monospora Hochstetter is condemned as a synonym of Trimena 
Harvey (1838). . • 
On the other hand I find that the name Monospora was also given by 
Sober in 1845 to an Alga of the family Bhodomelaceae; the name was accepted 
by all specialists of the group and is actually quoted in botanical text-books. 
