NO. 1 TAYLOR: PACIFIC MARINE ALGAE 57 



lar, subdichotomous to more commonly opposite or lateral, rarely secund, 

 the lesser branchlets to about 30 fx. diam., the cells 3-5 diameters long, 

 the tips blunt, sometimes rhizoidally modified. 



Panama: loose mats in high, hot tide pools on an islet in the bay, 

 Bahia Honda, no. 39-131 (TYPE), 26 Mar. 1939. 



Cladophora gracilis (Griffiths) Kiitzing, f. expansa Farlow 



Farlow 1881, p. 55; Taylor 1937, p. 89. 



Mexico: Is. Revilla Gigedo, with Enteromorpha in high, warm 

 tide pools. Sulphur Bay, I. Clarion, no. 34-66, 5 Jan. 1934. 



Cladophora sp. 



Plants clustered, to 1 dm tall, with several main axes arising together; 

 sparingly irregularly branched below, where the axes reach 130 /x diam., 

 the cells 7-10 diameters long; above more closely branched, often opposite, 

 the lesser branches excurrent, bearing somewhat fasciculate branchlets 

 25-35 /i, diam., the cells 3-5 diameters long, alternate, opposite or often 

 subpectinate, unilateral on the lower side. 



Ecuador: Archipielago de Colon, dredged from a rocky bottom at 

 37-55 meters, I. Espanola, no. 34-412, 31 Jan. 1934. 



Cladophora prolifera (Roth) Kiitzing,/. 



Plants very small, to 2-3 cm tall, coarse, densely tufted, dark green 

 drying brownish ; basal cell much tapered, often transversely i-ugose when 

 dry, the lower end rhizoidal, often supplemented by free rhizoidal exten- 

 sions of the segments above, 250-350 fx diam., 3-5 mm long exclusive of 

 the rhizoidal tip; lower vegetative branching trichotomous or opposite, 

 middle branching close, opposite, the cells 240-300 fx, diam., somewhat 

 tapering downward, 4-7 diameters long; upper branching opposite to 

 irregular, fastigiate, the branchlets 90-150 fx diam., with cells 1.5-2.5 

 diameters long, the tip cells a little tapered, obtuse. 



Kiitzing 1853, p. 25, pi. 82, fig. 3 ; Vickers 1908, p. 18, pi. 12. 



These little plants certainly come very close to small specimens of C. 

 prolifera from the Mediterranean, but the writer's Caribbean specimens 

 are all much larger. They probably represent a very poorly developed 

 phase of the species, rather than a new parallel type. The description is 

 based particularly on no. 34-461. 



