XXVI SYNOPSIS OF THE SPECIES. 



187. confervoides ; frond filiform, cartilaginous, irregularly branched or sub - 

 simple ; branches elongate, slender ; tubercles scattered, sessile, roundish, 

 subacute. (Tab. LXV.) 



188. erectaj fronds many from a common disc, short, erect, filiform, sparingly 

 branched ; tubercles globose, clustered ; tetraspores contained in terminal, 

 lanceolate, pod-like ramuli. (Tab. CLXXVII.) 



LVIII. HYPNEA. 



189. purpurascens ; purplish-red, excessively branched, bushy; branches 

 alternate; ramuli multifid, attenuate; tubercles immersed in the ramuli. 

 (Tab. CXVI.) 



Order 12. CRYPTONEMIACE^E. 



LIX. GKATELOUPIA. 



190. filicinaj frond narrow, tapering, once or twice pinnated; pinnae flexuous. 

 (Tab. C.) 



LX. GELIDIUM. 



191. corneumj distichous; branches linear, narrowed at each end, pinnate or 

 bi-tri-pinnate ; pinnules opposite or alternate, patent, obtuse. (Tab. LIII.) 



192. cartilagineum ; several times pinnated ; pinnae and pinnulae erecto-patent, 

 with rounded axils, linear, obtuse. (Tab. CCCXXXVII.) 



LXI. GIGAPTINA. 



193. pistillata; frond compressed, stipitate, flabellately branched ; branches re- 

 peatedly forked, with rounded axils, naked or pinnated with short, horizontal 

 ramuli ; tubercles solitary or in pairs, on the ramuli. (Tab. CCXXX1I.) 



194. acicularisj cylindrical, irregularly branched, between pinnated and dicho- 

 tomous ; branches divaricating ; ramuli few, recurved, subulate ; tubercles 

 scattered on the branches. (Tab. CIV.) 



195. Teediij frond flaccid, flattish, linear, acuminate, repeatedly pinnate ; pinnae 

 horizontal, set with horizontal, spine-like ramuli. (Tab. CCLXVL) 



196. mamillosaj frond fan-shaped, dichotomous, plane, channelled; segments 

 wedge-shaped ; tubercles roundish or ovate, pedicellate, scattered over the 

 disc of the frond. (Tab. CXCIX.) 



LXII. CHONDRTJS. 



197. crispusj frond stipitate, thickish, cartilaginous; the segments wedge- 

 shaped, variable in breadth ; apices emarginate ; axils obtuse ; sori elliptical 

 or oblong, scattered. (Tab. LXIII.) 



198. Norvegicus; frond linear, dichotomous, flat, dull red; axils patent; 

 apices rounded ; favellidia minute, imbedded in the substance ; nemathecia 

 scattered over both surfaces. (Tab. CLXXXVII.) 



LXIII. PHYLLOPHOEA. 



199. rub ens ; stipe short, expanding into the cuneate base of a narrow, ob- 

 scurely midribbed, rigid, blood-red frond, which is repeatedly proliferous ; 

 tubercles scattered over the surface, wrinkled. (Tab. CXXXI.) 



200. membranifolia ; stem filiform, elongated, branched; branches expanding into 

 broadly wedge-shaped, or fan-shaped, dichotomous dull purple laminae ; tu- 

 bercles on short stalks, rising from the stem or the laminae. (Tab. CLXIII.) 



