NO. 1 TAYLOR: PACIFIC MARINE ALGAE 259 



as broad, in the middle portion and larger branches somewhat zigzag, 

 about 90 IX diam. and the cells to 4 diameters long; longer branches alter- 

 nate, irregularly disposed, lesser branches and branchlets irregularly alter- 

 nate to regularly bilaterally pectinate, the upcurved ultimate branchlets 

 0.5-1.0 mm long, of 8-12 cells, at the base to 65 /a diam., tapering con- 

 siderably toward the summit, with cells about 1.5 diameters long, the 

 end cells often small but not themselves aculeate ; cystocarps sparse, gen- 

 erally on the upper portion of penultimate branches, about 90 ju, diam. 



There is a good deal of similarity between this species and C. soccori- 

 ense from the same locality; lacking extensive suites of specimens, the 

 thicker main axis with shorter cells and the shorter cells of the branchlets 

 seem to be adequate distinguishing features. 



Mexico: Is. Revilla Gigedo, on coarser algae dredged from 41-84 

 meters' depth at sta. 924 near I. Soccoro, no. 39-66B (cystocarpic, 

 TYPE), 18 Mar. 1939. 



Gallithamnion ecuadoreanum n. sp.^^** 



Plants 1-2 cm tall, very flaccid, freely alternately branched, uncorti- 

 cated, the axis to 150/1, diam. below, and the cells 5-10 diameters long, 

 the axis bearing a few leading branches but otherwise rather sharply 

 demarcate from the minor side branches, which are more slender and 

 have much shorter cells; branchlets 7-15 cells long, 36-54 /x diam. below, 

 at the tips very markedly tapered and short celled, the end cells sharply 

 aculeate and small ; tetrasporangia sessile, seriate on the upper side of ulti- 

 mate fertile branchlets, from the basal cell upward for 4-6 segments, and 

 also on the branches of the penultimate order, subspherical, reaching a 

 diameter of 50-60 /x; spermatangia not seen; cystocarps singly or bilobed, 

 to 150-180 IX diam., on the ultimate branchlets near their bases or on 

 other small subterminal branches. 



Gardner's ( 1927, p. 378) C. calif ornicum seems to have some features 

 in common with these specimens, such as the acute-tipped branchlets, but 

 ours have thicker axes and larger, spherical tetrasporangia. 



l^'O Callithamnion ecuadoreanum n. sp. — Planta 1-2 cm altitudine, flaccida, 

 alterne ramosa, encorticata, axe 150 \x diam., cellulis 5-10-plo diam. longitudine; 

 ramis magna ex parte non indeterminatis, tenuioribus, cellulas breviores habenti- 

 bus; ramulis 7-15 cellularura longitudine, 36-54 !.i diam., partibus extremis, cellulas 

 breves habentibus, ad cellulas cacuminis aculeatas abrupte attenuantibus; tetra- 

 sporangiis sessilibus, seriatis in latere superiore ramulorum, subsphaericis, 50-60 \i 

 diam.; cystocarpis singulis aut binis, ad 150-180 |J, diam. ad bases ramulorum ulti- 

 morum aut subterminalium. Planta tvpica in loco dicto I. Espafiola, Ecuador, legit 

 W. R. Taylor no. 34-402. 31 Jan. 1934. 



