OYSTOPTEEIDEiE XOl. 



126. ACROPHOBTJS, Presl, Tent. Pterid. 93 (extens.) j 

 Moore, Ga/rd. Ch/ron. 1854, 135 ; Id., Proceed. Lm. Soc. 

 ii. 286. , 



Leucoste&ia, Presl; Odontoloma, J. Sm.; ? Monachosoetjm, Kwnze 

 Datalli^ sp., Auct.; AapiDii sp., Auet ; Saccolomatis sp., Auct., 

 Stenolomatis sp,,-4wef,; Ctstopteeidis sp.fAuct.; 'LiNDB^m 3p.,Auct, 



MlCEOLEPI^ sp., Aucf. ; HUMAIJE Sp., Auct. ; DiOESONIJB sp., Bimj. 



Sori inuusiate globose, superficial or immersed; the recep- 

 tacles terminal (or rarely axillary in the forks of the venules.) 

 Ituiusium sub-orbicular, affixed by its posterior margin or base, 

 rarely two or three becoming confluent. Veins piunato-furoate 

 irom a costa,. or more rarely repeatedly dichotomous ; venules 

 free. 



Fronds membranaoeo-herbaoeous or sub-coriaceous, pinnate or 

 more frequently decompound ; the divisions isomerous or dimi- 

 diate. Ehizome creeping. — This group appears to us to be 

 properly separated from the Damalliete, on account of having its 

 indusium fixed only by its base, very much in the way of Oystop- 

 teris. Both Leucostegia and Odontoloma appear to be entirely 

 wanting in good distinguishing characters. Of Monachosorum 

 we know nothing beyond Kunze's figure and description ; judging 

 from which, however, it appears to be founded on an aged speci- 

 men of Acrophorus, from which the indusium had fallen away. 

 (See No. 100, ante p. Ixx.) 



§ Acrophorus. — ^Divisions of the frond isomerous. 



Ex. : A. nodosus, Preal. [ A. aflfinis, J\foore. 



A. immersus, Moore. A. hispidus, Moore. 



A. falcinellus, Moore. \ A. bifidus (DavaUia, Klfs.J 



§ Odontoloma. — Divisions of the frond dimidiate. 



Ex. : A. repens (Dicksonia, Bory. 1 A. adiantoides (Aspidium, Bl.J 

 A. euneifolius{Saccoloma,jPr.) A. tenuifolius (Lindsjea, M.J 

 A. Parkeri (DavaUia, Mook.J \ 



127. HUMATA, Cavcmilles, Prcelect. (1801), 272. 



PACHTPLEintlA, Pj-eff^; Pteeoneueoit, i^'^e; Davalli^ sp., Auct.; Ne- 

 pHEODn sp., .^Mci. ; Adiakti sp. , lAntiteua ; Nepheolepidis s])., Presl ; 

 Saccolomatis sp., Kv/aze. 



Sori indusiate, rotundate ; the receptacles terminal and verti- 

 cal, or rarely sub-terminal and obUque on the venules. Indusium 



