V. CORALLINAC^. 79 



Conceptacles not seen. Tetraspores of large size are scattered through the walls of 

 the ramuli. Colour, judging from dried specimens, a dark lurid purple, turning 

 greenish in decay. Substance tough, rigid when dry. In diying, it does not 

 adhere to paper. 



This is of firmer and more rigid texture and of darker colour than the ordinary 

 European L. ovalis, and at one time I considered it specifically distinct. Eecently 

 I have seen and examined Mr. Menzies' Nootka specimen, which is much more like 

 some of the dwarf English states of the species, and I am now of opinion that it is 

 better to retain my L. Coulteri as a variety only. 



There is much agreement in external habit between L. ovalis and Chrysymenia 

 uvaria, but the fructification is widely difi'erent. 



Plate XIX. A. Fig. 1, Lomentaria waZ/s war. Coulteri, tho, natural sizq. Fig. 

 2, a ramulus with tetraspores ; fig. 3, small portion of a section of the wall of the 

 same ; fig. 4, cross section of one of the solid branches. 



2. LoMENTARiA ? saccata, J. Ag. ; " Stem solid, short, densely branched, support- 

 ing obovate, vesicular ramuli attenuated at base into a slender petiole ; tetraspores 

 scattered through the ramuli ; conceptacles numerous, approximate, scarcely hemi- 

 spherical, inflated, sub-immersed." J. Ag. Sp. Alg. 2, p. 738, Dunwntia saccata, 

 Grev. MS. 



Hab. California, Herb. Greville. 



" Stems scarcely an inch high, as thick as a pigeon's quill, terete, solid, irregularly 

 much-branched. Ramuli sub-heterogeneous, emerging from the branches, borne on 

 setaceous petioli, saccate, resembling obovate, ellipsoid, inflato-tubulous bags, col- 

 lapsed when diy, three to ten lines in length, and two to six in diameter. Concep- 

 tacles densely aggregated. Colour a blackish purple. Substance of the stem car- 

 noso-cartilaginous ; of the ramuli membranaceous." 



This species is wholly unknown to me. 



