309 



L 



to understand, as both the leaf and acorn are eminently fitted to 

 terminate one extreme of the series of which Phellos is the other, 

 as I have endeavored to show in the accompanying plates. The 

 only cause for hesitation which I have in accepting this as a satis- 

 factory conclusion is that I failed to find trees oi rubra growing in 

 the immediate vicinity, although there are a number oi them only 

 a ^tw hundred yards away. We should however remember tliat 

 this species may have been present, associated with Phellos, y^d.xs 

 since, at the time when the existing large specimens oi heterophylla 

 were produced, probably 50 or 75 years ago. It may be that 

 hybridizatiou has not taken place in many years and that the 

 young trees are merely seedlings from a few originals. This idea 

 IS strengthened in my mind from the fact that the largest and 

 oldest trees come nearest to the type of rubra, while the smallest 

 or youngest trees show a preponderance of the Phellos type — ap- 

 parently showing a tendency to revert back to it. Dr, N. L. 

 Britton has also pointed out to me a significant fact in this con- 

 nection, viz. : that throughout the region where heterophylla has 

 been found Phellos, rubra, and other members of the black oak 

 group occur, but that to the eastward, in the Pine Barren region, 

 heterophylla or ncbra are not reported, although Phellos is abun- 

 dant and palitstris and othep: black oaks are present. In fact 

 heterophylla only seems to occur where Phellos and rubra occupy 

 a territory in common. 



Algse from Atlantic City, NJ. 



Collected by S. R. Morse. 



th 



The following species were collected at various times during 

 e years 1884 to 1888 inclusive, and the specimens sent to me 

 for examination ; also in May, 1S85, Mr. Morse and myself spent 

 3- few days together collecting. While this is certainly not a 



complete list of the algae of Atlantic City, it contains quite a large 



number for a locality having no rocky shore wdiatever, but an 



open sandy beach in front, and muddy creeks and marshes in the 

 rear. 



Gl(£ocapsa crepidintmi, Thuret. Common on woodwork. 

 ^^^tophysalis granulosa, Kutz. On shells, etc. Not previously 

 reported on the American coast. 



