402 BULLETIN OF THE BUREAU OF FISHERIES. 
Many of the algee growing in the localities noted above are covered with mud and have a 
pale, sickly appearance. Under such conditions it is not surprising that the number of 
species and individuals is small. 
It is surprising, however, that the alge were not more abundant in Pamlico Sound 
at Ocracoke. Here are several jetties and piles of shells that would seem to furnish 
excellent habitats for alge. Ocracoke Inlet (leading directly to the open ocean) is only 
2 km. away, and the water is not more turbid than around the laboratory in Beaufort 
Harbor; yet only 14 species were found there, the majority of the species that are 
dominant in Beaufort Harbor being entirely lacking. This scarcity may be due in part 
to the low density observed there, but further studies are needed to explain these facts. 
The algze collected in Newport River near ‘“‘Green Rock” were, with the exception 
of Gelidium, mostly unattached. These seem to be plants that have been brought here 
by the tide and are continuing their existence floating near the bottom. 
It is worthy of note that, with the exception of fragments of Enteromorpha, ete., on 
the sand breaks at Fort Macon and Shackleford, no alge were ever observed during the 
summer growing on wood in Beaufort Harbor. Although there are numerous wharf, 
beacon, and railroad piles and two plank walls here with alge attached to shells and 
stones near their bases, not a single specimen of alge, not even Lyngbya, was ever found 
on these. In North River, Core Sound, and Pamlico Sound, on the contrary, there were 
found abundant Lyngbya and several plants of Enteromorpha, Ectocarpus, Dictyota, 
and Hypnea on the piles of wharves and beacons, and in the spring Enteromorpha, 
Porphyra, and other alge grow abundantly on the wharf piles in Beaufort Harbor. The 
reason for this is not apparent, but it seems probable that it is caused by the crowding 
out of the alge by sponges, barnacles, ascidians, and other animals which grow abun- 
dantly on these piles. 
In no case have there been observed large numbers of animals and alge growing 
together, the parts of both rocks and buoys which bear a conspicuous growth of alge 
being comparatively free of animals and vice versa. Studies on this point would probably 
yield some interesting data. 
OTHER LOCALITIES. 
No extended studies have been made at any place other than Beaufort, but the 
observations made indicate that other localities, while differing considerably in detail, are 
affected by the same general factors as at Beaufort. With some exceptions the alge are 
confined to the zone below low-tide line, they extend scarcely more than 90 cm. below low 
water, and they have to endure great turbidity. At no place, however, was there found 
anything approaching the number of species or of individuals observed at Beaufort. 
This seemed especially surprising in the case of Charleston, S. C., since a considerable 
number of species has been reported from this place by earlier collectors. Three days at 
different times during July and August were, however, spent in a careful search of this 
harbor, including James Island, Morris Island, Isle of Hope, and Isle of Palms, without 
revealing a large number of species or of individuals. While the records below were 
obtained from observations made on short visits to each place, they represent from one 
