iOO Ptib. Puget Sound Biol. Sta. Vol. 2 



Phaeophyceae: age of Pterygophera californica, 65; controlling factors in the 

 vertical distribution of Fucus, 139; hydrogen-ion concentration and other 

 factors affecting the distribution of Fucus, 287; morphology and taxonomy 

 of four ligulate species of Desmarestia, 313; osmotic pressure in Nereocystis 

 in relation to the salinity of the water, 193; susceptibility in certain ones, 

 249; variation in the number of ribs in Costaria costata, 307. 



Physiology, animal: action of KCN on oxygen consumption in certain inverte- 

 brates, 387; relation of animals to variation in hydrogen-ion, 369; resistance 

 of sea-urchin eggs to sulphurous acid, 113; Salmincola edwardsii growing 

 on trout, 73, 153. 



Physiology, plant: absorbent power of Sphagnum, 211; contact and injury in 

 Pterygophora, 65; experiments with Fucus to determine the factors con- 

 trolling its vertical distribution, 139; hydrogen-ion and other factors affect- 

 ing the distribution of Fucus, 287; relation between osmotic pressure in 

 Nereocystis and the salinity of the water, 183; study of susceptibility in 

 some Puget Sound algae, 249. 



Pisces: behavior of some shore fishes, 79; fish lice on trout, 73, 153; relation 

 of fishes to acids, 87, 97; relation of fishes to sewage, 97; summer embryo- 

 logical condition of certain Puget Sound fishes, 137. 



Plankton: relation to the hydrogen-ion content of the sea-water, 369. 



Platyhelmlnthes: summer embryological conditions of certain ones, 135. 



Porifera: summer embryological condition of certain ones, 128. 



Seed dispersal: Plant migration along a partly drained lake, 393. 



Taxonomy, animal: key to the echinoderms of Friday Harbor, Washington, 

 17; Melibe leonina, 269. 



Taxonomy, plant: an interesting fungus (Rhizopogon dipjophloeus) from Fri- 

 day Harbor, 95; Chytridium codicola, 122; Costaria costata, 307; fungi found 

 on Codium mucronatum, 121; a list of lichens from southeastern Alaska, 

 279; Rhizophidium codicola, 122; Rhizopogon diplophloeus, 95; Stemphylium 

 Codii, 123. 



AVater conditions: affecting osmotic pressure in Nereocystis, 183: affecting 

 vertical distribution of Fucus, 139; affecting short fishes, 79; hydrogen-ion 

 and other factors affecting the distribution of Fucus, 287; hydrogen-ion 

 content in relation to the organisms in it,. 369; sewage affecting fishes, 97; 

 sulphurous acid affecting sea-urchin eggs, 113. 



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