62 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



Mexico: tufts on rocks in the surf zone, White Friars Is., no. 39- 

 629, 7 May 1939. Ecuador: Archipielago de Colon, intertidal on I. 

 Wenman, no. 34-86, 11 Jan. 1934. 



Gaulerpaceae 



Plants moderate to very large, branching in forms simulating the 

 rhizoids or roots, stems and leafy branches of higher plants; coenocytic 

 and nonseptate; reproduction involving local segmentation of the proto- 

 plast and discharge of swarmers through papillae on the plant surface. 



GAULERPA Lamouroux, 1809 

 KEY TO SPECIES 



1. Branchlets mucronate 2 



1. Branchlets smooth on the rounded ends 3 



2. Branchlets subcylindrical, short and divergent 



C. cupressoides v. Lycopodium 



2. Branches cylindrical, slender, 10 diameters long or more, regu- 

 larly distichous C. sertularioides 



3. Branchlets typically with the ends spherical or a little compressed 



C. racemosa 



3a. Branchlets long-clavate to subcylindrical, erect spreading, 



on a long axis ; plants of quiet tide pools ... v. laetevirens 

 3b. Branchlets short-clavate, at least near the top of the elongate 

 and often branched erect axis, closely set, the pedicels slen- 

 derer and often upcurved, the end of the branchlet rather 

 sharply expanded ; plants of quiet tide pools . v. occidentalis 

 3c. Branchlets short, broader, and somewhat flattened on the 

 exposed face, crowded on a short axis; plants of exposed 



reef faces v. uvifera 



3. Branchlets with the ends flat and peltate when fully developed 

 C. peltata 



Gaulerpa cupressoides v. Lycopodium near f. elegans 



Weber-van Bosse 



Weber-van Bosse 1898, p. 335, pi. 27, figs. 8, 9. 

 Ecuador: Valle, one fragment at I. Gorgona, no. 34-494 A, 12 Feb. 

 1934. 



