XXV1U SYNOPSIS OF THE SPECIES. 



LXXV. NACCARIA. 



216. "Wiggiij frond filiform; branches alternate, repeatedly divided, attenuate; 

 ramuli spindle-shaped, quadrifarious. (Tab. XXXVIII.) 



LXXVI. GLOIOSIPHONIA. 



217. capillaris. (Tab. LVII.) 



LXXVII. NEMALEON. 



218. multifidum; frond dichotomous, slightly branched, dull purplish-red ; the 

 axils rounded. (Tab. XXXVI.) 



219. purpurea j stem undivided, attenuate at the base and apex; branches 

 lateral, scattered, tapering, naked or having a second series of similar 

 branchlets. (Tab. CLXI.) 



LXXVIII. DUDKESNAIA. 



220.' coccineaj rosy red, irregularly much branched; branches moniliform, at- 

 tenuated upwards, decompound. (Tab. CCXLIV.) 



221. divaricataj pale red, excessively branched; branches horizontal, once or 

 twice pinnated ; ramuli divaricating. (Tab. CX.) 



LXXIX. CROTJANTA. 



222. attenuate (Tab. CVI.) 



Order 13. CERAMIACE.E. 



LXXX. PTILOTA. 



223. plumosaj cartilaginous, decompound ; secondary branches bi-tri-pinnate ; 

 pinnae and pinnulse opposite, the latter subulate, inarticulate, but traversed 

 by a jointed midrib; favellse involucrate, pedicellate. (Tab. LXXX.) 



224. sericeaj flaccid; the pinnulae articulate, formed of a single row of cells. 

 (Tab. CXOI.) 



LXXXI. MICROCLADIA. 



225. glandulosa. (Tab. XXIX.) 



LXXXII. CERAMIUM. 



* Smooth ; frond uniformly coloured throughout. 



226. rubrum; robust, gradually attenuated, irregularly dichotomous with 

 lateral, forked or multind ramuli ; apices hooked inwards ; articulations 

 unarmed, coloured ; tetraspores whorled, immersed ; favellae involucrate, 

 on the lateral branchlets. (Tab. CLXXXI.) 



227. botryocarpum j filaments crooked at the base, robust, attenuated, irregu- 

 larly dichotomous, with crowded, lateral, mostly simple ramuli ; apices 

 straight ; articulations coated with cells, unarmed ; dissepiments con- 

 stricted ; tetraspores whorled, immersed ; favelke terminating the lateral 

 branchlets, involucrate. (Tab. CCXV.) 



(The so-called "favellce" of the text (under PI. CCXV.) are diseased 

 tetraspores.) 



* * Smooth ; nodes coloured, internodes colourless. 



228. decurrens; robust, attenuated, dichotomous, with lateral dichotomous 



