2970 | UwpERWOOD: REVIEW OF THE GENERA OF FERNS 
no type is mentioned this genus must be cited from 1824; 4. 
Saccoloma (51) based on S. elegans from Brazil ; and 5. Crdotium 
(53) based on C. Chamissoi from the “ Südsee." 
1821 
Brongniart (Bull..Soc. Phil.) founded the genus Ceratopteris 
(186) with two species (1) Ceratopteris thalictroides founded on 
Pteris thalictroides Sw. ((a) Acrostichum siliquosum and (b) A. thalic- 
troides L.) and (2) Ceratopteris Gaudichaudi from the Marian Is. 
1821 
S. F. Gray (Nat. Arr. Brit. Plants, 2: 9) founded the genus 
Cyclopteris based on C. fragilis ( = Filix). 
1822 
Presl (Deliciae Pragenses) establishes the genus Trichipteris 
(172) on 7. excelsa from Brazil. Later he changed the name to 
Trichopteris. ; 
1823 
R. Brown (App. Franklin's Journ. 767) established the genus 
Cryptogramima based on C. acrostichoides ; and Teleozoma based on 
Pteris thalictroides Swz. which he had recognized as a good genus 
thirteen years before but unfortunately had suggested no name. 
1824 
Kaulfuss (Enumeratio Filicum) published the results of Cha- 
misso's journeys and established the following genera of ferns: 
1. Helmithostachys (28) founded on H. dulcis (Osmunda Zeylanica 
L.) ; 2. Chnoophora (123) based on C. Humboldtii Kaulf. (Cyathea 
villosa H. & B.); 3. JVzphobolus (124) substituted for Cyclophorus 
Desv., because the latter was preoccupied in conchology, based 
on N. adnascens (Polypodium adnascens) and six other species ; 4. 
Hymenolepis (146) based on H. ophioglossoides (Acrostichum spica- 
tum); 5. Leptochilus (147) based on L. axillaris ; 6. Ellobocarpus 
(147) based on Z. oleraceus ( Ceratopteris) ; 7. Sadleria (161) based 
on SS. cyatheoides Kaulf. from the Hawaiian Islands. 8. Axirophyum 
(197) based on A. pumilum (Hemionitis immersa Willd.), A. planta- 
gineum (Hemionitis plantagineum Cav.), and three others; 9. Cas- 
