I9I4-] FARLOW— VEGETATION OF SARGASSO SEA. 261 



of the two species does not appear to be common in the Sargasso 

 Sea itself but, as one approaches the land, the floating 6". vulgare 

 mixed with 6^. bacciferum is common and one finds both common 

 even on the surface of landlocked waters like Harrington Sound, 

 Bermuda. 



A very interesting case is that of the mixture of a species of 

 Cystoseira and gulf-weed collected by Professor F. H. Storer on a 

 voyage from the Cape of Good Hope to New York. The exact 

 position cannot be stated but according to information given by Pro- 

 fessor Storer it was approximately io° N. by 40° to 45° W. One 

 gathering only was made and from it was obtained the specimens of 

 S. bacciferum distributed in the " Algae Americse Borealis " of 

 Farlow, Anderson and Eaton. This set has been seen by all the well 

 known algologists of the world and, as no one has questioned the 

 determination, it may be supposed to be correct. The Cystoseira 

 was entangled in the Sargassum. The species of Cystoseira are com- 

 plicated and not easy to name and the specimens in question were 

 not in fruit. As far as I could tell, the species appeared to be very 

 near C. crinita Bory, a Mediterranean species. Specimens have been 

 examined by Sauvageau, the expert student of the genus, whose 

 opinion is that in spite of certain points in common with C. crinita 

 he would not venture to assert that they belong to that species. The 

 interesting fact, however, is that, whether C. crinita or not, it must 

 have come from the southeastern shore of Europe or of Northern 

 Africa including the Atlantic islands since the species of Cystoseira 

 abound in that region and, with one exception, none are found on 

 the east coast of North America. C. Myrica is a rare species of 

 Florida and the Bahamas and is quite different from the floating 

 Cystoseira. As far as could be told from the material collected by 

 Professor Storer, the Cystoseira in spite of its long journey was in 

 as good a condition as the gulf-weed with which it was found. This 

 is instructive as showing how far specimens can be transported by 

 currents without perceptible injury. 



In conclusion, in the limited time at our disposal, I shall show 

 you a few slides of the gulf-weed and related species to illustrate 

 more clearly some of the points I have mentioned. Everything con- 

 sidered it seems to me that in the present state of our knowledge we 



