SYNOPSIS OF THE SPECIES 



I. MELANOSPERMEjE. 



Order 1. FUCACE I 



I. SAEGASSUM. 



1. vulgarej stem filiform, alternately branched; leaves lanceolate, serrated, 



strongly ribbed, glandular ; air-vessels on compressed stalks, spherical, 

 pointless ; receptacles axillary, unarmed. (Tab. i < !( \ LUI.) 



2. baccifemmj leaves linear-lanceolate, very narrow, without pores; air-vessels 



spherical, mucronate. (Tab. CIX.) 



II. HALIDRYS. 



3. siliquosaj branches linear ; air-vessels compressed, linear-lanceolate, slightly 



constricted at the septa, mucronate. (Tap,. IAYI.) 



III. CYSTOSEIRA. 



I. ericoides ; stem short, bearing numerous decompound branches, which are 



densely clothed with short, spine-like ramuli ; air-vessels small, solitary ; 

 receptacles armed. (Tab. CCLXV.) 

 5. granulata; branches bulbous at the base; receptacles elongate, without 

 macro. (Tab. LX.) 



G. barbata; branches bulbous at the base; receptacles short, mucronate. 



(Tab. CCCLX.) 

 7. fcenicuiacea j branches Blender, rough with hard points, repeated!} dicho- 



tomo-pinnate j air-vessels small, one or two together; receptacles minute, 



smooth, linear-lanceolate. (Tab. CXXII.) 



s. fibrosa; branches slender, bi-tri-pinnate ; pinnules set with Betaceous 

 ramuli; vesicles elliptical, solitary or in pairs; receptacles very long, 



with spine-like pr< I ' \ B ( \ \\ I I l.i 



IV. PYCNOPHYCUS. 



9. tuberculatus. (Tai;. lAWIX.I 



\ PUCUS. 



10. vesiculosus; frond flat, midribbed. dichotomOUS, entire ; air-vessels in pairs 



or absent ; receptacles turgid, terminal. (Tab. ( ( l\ 



II. ceranoides ; frond plane, coTi&c o o- mem bratuiceouSy entire, midribbed, without 



resides, dichotomous, with lateral narrow, dichotomous, fastigiate, fertile 

 branches. | IM;. C( I.WI 

 12. serratuB; frond flat, midribbed, serrated, without air-vessels. (Tab, XLVII.) 



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