NO. 1 TAYLOR: PACIFIC MARINE ALGAE 29 



attaching to the corresponding vegetation of similar areas, particularly 

 coral reef areas, in the Caribbean and the western Pacific. ^Vhile the genus 

 Codium is well represented, such notable genera as Avrainvillea, Pen- 

 icillus, and Udotea are absent; in Dasycladaceae there are only two rep- 

 resentatives ; Valoniaceae are few and scarce, and even Cladophoras were 

 seldom met with. The Chlorophyceae of this territory were predomi- 

 nantly plants of the littoral and tide pools, only 5 not being found here at 

 all, though several occurred at some depth as well as in shallow water. 

 The species found were seldom secured from more than one or two of the 

 areas into which the surveyed territory was, somewhat arbitrarily, di- 

 vided. This more detailed field work will no doubt alter. When attempt- 

 ing to analyze the flora on the basis of range within this area, it soon 

 becomes clear that there is little of a decisive character. The most tropical 

 genus, Caulerpaj has a scattered distribution throughout the territory. The 

 genus Codium, tropical and warm temperate, was met in more areas in 

 the southern than in the northern and presumably warmer portion. This 

 is true for the Galapagos Islands as well as for the territory in general. 

 The relations of the species in this population to those of other parts of 

 the world are also very scattering. The most noticeable elements are those 

 which have a general distribution in tropical and subtropical areas, those 

 of western Pacific of northern Pacific range. There is nothing in the 

 Chlorophyceae to suggest any significant Caribbean element. It is not 

 surprising that there is little in common with the recorded flora to the 

 south, for this is ill known. However, there are only about one fifth of 

 the species in common with the list from the Gulf of California; the 

 writer has the feeling that as the areas are more thoroughly studied the 

 correspondence will be considerablj' closer, and more so in Chlorophyceae 

 than in other algal groups. As nearly all the specimens available to the 

 writer were collected in the first third of the year, nothing can be said 

 about seasonal changes in the composition of the flora. 



The Phaeophyceae present a very different picture from the Chloro- 

 phyceae, but still one which it is dangerous to interpret too closely. In 

 contrast with the green algae, they are a truly conspicuous feature of the 

 marine vegetation at times, although, except in a few situations, they do 

 not dominate as they commonly do in cold northern seas. There are repre- 

 sented 24 genera and upward of 50 species. Since endophytes, minute 

 epiphytes, and certain species of Ectocarpus which would raise the number 

 considerably are not included, this represents a quite varied flora, as 

 Phaeophycean floras go. There are many items of very great interest, for 

 the subtropical and tropical element is marked and there are numerous 



