XVI SYNOPSIS OF THE SPECIES. 



XXII. S TBI ARIA. 



42. attenuataj branches and ramuli mostly opposite, tapering to each ex- 



tremity. (Tab. XXV.) 



XXIII. PUNCTARIA. 



43. latifoliaj oblong or obovate, pale green, blunt, suddenly tapering at the 



base into a minute stipe. (Tab. VIII.) 



44. plantaginea j frond brownish-olive, cuneate at the base. (Tab. CXXVIII.) 



45. tenuissima j frond sublinear, very thin and transparent. (Tab. CCXLVIII.) 



XXIV. ASPEROCOCCTJS. 



46. compressus; frond compressed, flat, linear-lanceolate, obtuse ; sori oblong. 



(Tab. LXXII.) 



47. Tumeri; stipe filiform, suddenly expanding into an inflated, obtuse, deli- 



cately membranaceous, bag-like frond. (Tab. XI.) 

 4S. echinatus j cylindrical or clavate, much attenuated at the base. (Tab. CXCIV.) 



XXV. LITO SIPHON. 



49. pusillusj fronds filiform, very long, clothed with pellucid hairs; spores 



scattered. (Tab. CCLXX.) 



50. Ijaminarise ; fronds short, stellately tufted, smooth, transversely banded, 

 bands close together; spores scattered. (Tab. CCXCV.) 



Order 5. CHORDARIACE.E. 



XXVI. CHORDARIA. 



51. flagelliformis j branches lateral, subsimple, filiform, naked; peripheric fila- 



ments club-shaped. (Tab. CXI.) 



52. divaricataj irregularly divided ; branches subdichotomous, flexuous, having 



short, very patent, forked, scattered ramuli ; peripheric filaments capitate. 

 (Tab. XVII.) 



XXVII. MESOGLOIA. 



53. vennicularis j frond unequally distended, clumsy; branches irregularly 

 pinnate, worm-like, thickened in the middle ; ramuli copious. (Tab. XXXI.) 



54. Griffithsiana j frond slender, equal; branches scattered, filiform, long, 



simple, nearly bare. (Tab. CCCXVIII.) 

 5 5 . virescens ; frond filiform, gelatinous ; branches long, slender, villous ; 

 ramuli numerous, patent, short, linear, obtuse. (Tab. LXXXII.) 



XXVIII. LEATHESIA. 



50. tuberiformis j fronds at first stuffed with cottony fibres, at length hollow. 

 (Tab. CCCXXIV.) 



57. Berkeleyi; dark brown, depressed, solid. (Tab. CLXXVI.) 



XXIX. RALFSIA. 



58. verrucosa, Aresch. ; frond orbicular, adhering by its whole under surface, 



wailed in the middle. (Tab. XCVIII. R. deusta) 



(Ralfsia deusta, J. Ag., founded on the original Zonaria deusta of Agardh, 

 is a different species.) 



