Butters: liagora and galaxaura. 165 



central cylinder translucently thin, its diameter scarcely equalling 

 the length of the fascicles, fascicles vertical, below very slender, 

 hyaline, above distantly dichotomous with acute angles, at the top 

 tenninated by a corymb of short branches, at the apex of the 

 branches of the frond forming a dense cushion. 



Waianae, Oahu. :May 26, 1900. (J. E. T. 861.) 

 It is with some hesitation that I include this specimen in the 

 above species. The Hawaiian specimens are small, 1.5-3 cm. high. 

 .5-.75 mm. in diameter, dichotomously branched at intervals of 2-8 

 mm., sometimes appearing pinnate by the unequal development of 

 the two branches of a dichotomy. With the exception of the obtuse 

 tips of the branches the frond is completely covered with a solid 

 crust of lime, which is, however, punctate with uncalcijfied dots, the 

 cystocarps. The whole frond is very brittle and fragile. 



The central cylinder is composed in the young branch, of some- 

 what closely packed large filaments, while in slightly older branches 

 smaller filaments intervene between these, and also surround the 

 whole central cylinder. The central cylinder remains thin, being 

 about .3 mm. in diameter in mature branches. It is somewhat firm- 

 ly gelatinous. The cortical branchlets cohere in a dense pulvinate 

 tuft at the apex of the branch. Below they are somewhat widely 

 separated. The lowest cells in the branchlets outside the central 

 cylinder are 8-10 mic. in diameter and about four times as long. 

 Upward the branches are several times dichotomous with narrow 

 acute angles. At the summit they form a somewhat loose corymb 

 of moniliform filaments of obovate cells, the distal cells averaging 

 5x10 mic. The cells towards the base of the corymbose head are 

 often three times as long and twice as v/ide as the terminal cells. 

 In the older parts of the frond the latter not infrequently disappear. 

 Numerous cystocarps are present with the involucre little marked 

 and resembling the ordinary vegetative filaments of the frond. 



Liagora maxima sp. nov. 



Tilden. American Algae. Cent. \'. no. 418. 1901. (L. decus- 

 sata.) 



PLATE XXIV. FIG. 3-5. 



Fronde tereti, pinnatim paniculata ad 40 cm. alta inferne 1-1.5 

 mm. lata, a basi sursum parum attenuata ramos inferiores axi prin- 

 cipali similes et eundem paene aequantes superiores breves, obtusis- 

 simos clavatos quasi pedunculatos gerente. crusta farinacea instruc- 



