Butters: liagora and galaxaura. 167 



The type material has been distributed by Miss Tilden under 

 the name Liayora dccussata Mont, in American Algae, no. 418. 



Liagora intricata sp. nov. 



PLATE XXIV. FIG. 6. 



Fronde parva, dure gelatinosa, dichotome furcata, ramis saepe 

 coalescentibus intricata, crusta calcarea continua transversim stri- 

 ata (in exsiccatione rugosa) obtecta apicibus decalcaratis conspicuis 

 obtussisimis (exsiccatione acutis factis) ; strato axile duro carti- 

 lagineo, filis teretibus, cylindraceis composite, et minoribus et ma- 

 joribus, his ad 15 mic. crassis parietibus crassissimis, illis ad 4 

 mic. crassis, ex filis corticalibus orientibus et in stratum exile re- 

 deuntibus ; ramulis corticalibus brevibus, duplo seu tripolo dichoto- 

 mis, corymbum abruptum ferentibus cujus cellulae ultimae obova- 

 tae ad 18 mic. longae, 10 mic. crassae sunt, cellulis sub corymbum 

 minutorum binorum ex cellulis ultimis atque praecipue penultimis 

 ramulorum corticalium orientum ; cystocarpiis maturis mihi ignotis. 

 filis plurimis rhizoideis ferentibus ; antheridiis catenulis cellulorum 



Tahiti, Society Islands. September, 1910. (J. E. T.) 



Diamond Head, Oahu. (A. A. Heller no. 2285a) (as Gal- 

 axaura rugosa. [Soland.] Lam. var. attenuata n. var.) The 

 "type material" in the herbarium of the University of Minnesota 

 agrees with the above described Tahitian Liagora. 



This species has a somewhat stout but short and much branch- 

 ed frond. The branches are intricately woven together and often 

 grow fast to one another at the points of contact. It has a very 

 firm cartilaginous texture, much like that of some Galaxauras. 

 The limy incrustation is continuous, not very firm in the material 

 from Tahiti (preserved in formaline), but in the dried Hawaiian 

 material firm and rugose. The central cylinder becomes stout and 

 is characterized by the almost cylindrical form and exceedingly 

 thick walls of the larger filaments. These filaments are 12-17 mic. 

 in diameter, increasing only about 2 mic. towards the distal end 

 of each cell. Their cell contents are only about 2 mic. in width. 

 These cells bear the cortical branchlets, which are only about 200 

 mic. long. The first two or three cells of a cortical branch are nar- 

 rowly cylindrical and thick walled, about 8x35 mic. The next cells 

 are elongated elliptical, about 10x30 mic, the terminal ones obovate, 

 about 12x14 mic. These filaments are commonly forked at the 

 summit of each of the first two or three cells (in these branchings 



