ULGM. 253 



• woolly filaments. Frond cylindrical or flat, nerveless (except 

 in Haliseris), thin, entire or divided, often fiabelliform. Fruc- 

 tification ; roundish-ovate, pear-shaped or club-shaped seeds 

 enveloped in a pellucid case, covering the surface, or scattered, 

 or forming minute spots or transverse lines. The seeds in most 

 cases are produced beneath the epidermis, through which they burst 

 and become prominent. Grev. 



13. Chorda. Frond simple, filiform, cylindrical, with an 

 interrupted cavity. Foot naked, scutate. 'Fructification ,• ex- 

 ternal continuous masses of pear-shaped seeds, fixed by their 

 base. Grev. 



14. Asperococcus. Frond tubular, cylindrical, continuous, 

 membranaceous. Foot minutely scutate, naked. Fructifica- 

 tion ; distinct spots composed of imbedded seeds, mixed with 

 erect, club-shaped filaments. Grev. 



15. Plnctaria. Frond simple, membranaceous, flat, with 

 a naked scutate root. Fructification scattered over the whole 

 frond in minute distinct spots, composed of roundish prominent 

 seeds, intermixed with club-shaped filaments. Grev. 



16. Striarta. Frond filiform, tubular, continuous, mem- 

 branaceous, branched. Root naked and scutate. Fructification ; 

 groupes of roundish seeds, forming- transverse lines. Grev. 



17. Dictvosiphon. Frond filiform, tubular, continuous, 

 branched. Foot minutely scutate, naked. Fructification ; 

 ovate, scattered seeds, lying beneath the epidermis. Grev. 



18. Dictvuta. Frond flat, highly reticulated, membra- 

 naceous, diehotomous or irregularly cleft ( palmato-ffohelliform 

 in J), o/oiiuirid). Foot a mass of woolly filaments. Fructifica- 

 tion composed of scattered, or variously aggregated, Bomewhat 

 prominent seeds, on both surfaces of the frond. Grev, 



19. Cutx£ria. Frond piano-compressed, cartilagineo-mem- 

 branaceous, subflabelliform, irregularly cleft. Jloo{ a mass «»t 

 woolly filaments. Fructification; minute tofts of capsules, scat- 

 tered on both surfaces of the frond, the capsules pedicellate, con- 

 taining several distinct granules, Grev, 



20. Pad/na. Frond flat, highly reticulated, subcoriaceous, 

 flabelliform, mostly undivided, marked with concentric lines. 

 Hoot a mass of woolly filaments. Fructification ; ovate, black- 

 ish seeds, fixed by their base, bursting through the epidermis in 

 compact concentric lines, (rarely >|»<n^, > mostly on one surface 

 of the frond* Gn r. 



•_' l . rlALfsERis. Frond tint, linear, membranaceous, with a 

 midrib. Hoot a mass of woolly filaments. Fructification; ovate 



