KEYS TO THE FERNS OF BORNEO 
4 1 ? 
3. S. pusillum (Bl.) v. A. v. R. 
Common. 
Malaya to Ceylon and Queensland. 
4. S. sulcatum (Mett.) v. A. v. R. 
• • • >yj, rvj *! A ? A f ' 
Sarawak, Kinabalu. 
Malaya to Ceylon and Polynesia. 
73. MONOG RA MMA Sghkuhr. 
a. Sorus on one side, near apex. 1. M. darcicarpa. 
ai. Sori on both sides, frond fetiform 2. M. trichoidea. 
1. M. dareicarpa Hooker. 
Labuan. 
Philippines, New Guinea. 
2. M. TRICHOIDEA J. Sm. 
Sarawak, Dutch Borneo. 
Philippines. 
PAM. VIII. PARKERIACEiE. 
CERATOPTERIS Brongniart. 
A single species C. thalictroides. 
C. thalictroides (L.) Brongn. 
Common, in wet, open places. 
Pantropic and to Japan. 
PAM, IX. MARSILEACEJE. 
M ARSILEA Linnaeus. 
A single species M. quadrat a. 
M. QUADRATA A. Br. 
North Borneo. 
Endemic. 
