BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 5. N:0 5. 17 
The position of the genus Gonatonema among the other 
Mesocarpee may be made clear by the following scheme: 
| agamospore2, 
sine conjugatione, 
tripartitione cellu- 
larum singularum Genera: 
5 Orte: I Gonatonema 
5 n. gen. 
E 
2) 
IR 
| 
2 Subgenera: 
[20] 8 5 . 
ER RSS RO ER quadricellulare 
& | conjugatione = bi- 
1. Staurospermum Kitz.!) (incl. 
SEDER Re Spherospermum Clev.). 
peracta, tri-quadri- 
partitione cellulze 
conjugationis orte. II Mougeotia 
(Ag.) Wittr. 
Pericarpium 
tricellulare 
1 Plagiospermum Clev. 
bicellulare 
3. Mesocarpus Hass. (incl. Cra- 
terospermum A. Br. et Pleu- 
rocarpus A. Br.) 
1) To this subgenus I think also Mougeotia calcarea (Clev.) Wittr. (1. c., p. 
40) ought to be counted. During a renewed visit to Gotland I have 
found that the formation of carpospores in this species is regularly 
effected through quinquepartition. The formation of spores through 
tri- and quadripartition as well as the formation of parthenospores is to 
be regarded as exceptional. 
ne 
