246 NEW PUBLICATIONS. 
Tribus I. —Wolffiece. 
I. Genus Worrrra, Horkel. 
I. Subgenus Zuwolffia. 
. JF. Columbiana, Karsten. 
9. W. cylindracea, Welw. 
3. JF. arrhiza, Wimm. 
4. W. Brasiliensis, Weddl. 
. W. microscopica, Kurz. 
6. JF. hyalina, Delil. 
1. W. repanda, Hegelm 
8. W. Welwitschii, Hopetin’ 
II. Subgenus Wolffedla. 
s, oblonga, Hegelm. 
E 
12. JF. denticulata, Hegelm. 
Tribus IT. —Lemnese. 
IL Genus Lemna, L. 
I. Subgenus Hydrophace. 
. L. trisulea, L. 
. L. Valdiviana, Philipp. 
. L. perpusilla, Torr. 
. L. pauci-costata, Hegelm. 
L. Angolensis, Welw. 
L. minor, L. 
DU Qo fo n 
Na 
II. Subgenus Telmatophace. 
7. L. gibba, L. 
III. Genus Sprropeta, Schleid. 
1. S. oligorrhiza, Hegelm. 
2. S. polyrrhiza, Schleid. 
The author corrects an error of synonymy committed by Dr. Trimen 
with regard to Wolfia Delilii, Schleid., and also by Dr. Kurz in the vari- 
ous species he wrote on. Dut he seems himself to have made some blun- 
ders with regard to the West Indian species of Wolffa, for he seems 
