affecting the local distribution, such as the nature of the coast 

 and of the bottom in deeper water, the tides and tidal currents, 

 the effects of Ice, depth of water, light, temperature and seasonal 

 changes, and salinity of the water. In the third chapter, the 

 characteristic algal associations and formations are described 

 and analyzed. A chapter of remarkable interest and value 

 concerns the algae of Spindle Rocks, a group of ten boulders at 

 one of the entrances to the ship channel at Woods Hole. The 

 flora of these rocks was under a more or less continuous observa- 

 tion during a period of fifteen months and the seasonal variation 

 in their flora is shown with great clearness by a series of eight 

 charts. It is to be hoped, as the author suggests, that this 

 record of interesting results may stimulate others to make 

 similar sustained and intensive studies of the flora of other 

 limited areas. The first part of Professor Davis's paper closes 

 with an account of the distribution of the marine algae in the 

 deeper waters, the flora of certain inshore regions of peculiar 

 interest, and with a series of charts illustrating the distribution 

 of thirty-eight of the more common and characteristic species of 

 the region. 



The catalogue of species, which comprises the second part of 

 Davis's work, includes full details as to distribution and seasonal 

 occurrence and cites the specimens and records on which his 

 own records are based. The number of species recognized is 

 240. The nomenclature of the list is of the current sort. A 

 recent reviewer, Mr. F. S. Collins, has commended it as "con- 

 forming to the Vienna Rules,"* which is possibly true of it, to a 

 certain degree. However, as Mi". Collins himself has more re- 

 centlyt hinted, the use of Farlow's specific name Bornetiana for 

 our common Griffithsia is obviously in violation of the Vienna 

 Rules. It may be added that the specific name of our handsome 

 red alga currently known as Dasya elegans is evidently, under 

 the Vienna Rules, pedicellata, the type of the species being a 

 specimen from New York sent to the elder Agardh by John 

 Torrey. And Phyllitis, under the Vienna Rules and the Brussels 



* Rhodora 15: 152. 11 Au 1913- 

 t Science II. 38: 597. 24 O 1913. 



