COLLECTING AT BAR HARBOR 43 
Under the rockweeds in small pools and crevices are the poly- 
zoans Bugula turrita and Membranipora pilosa, and the hydroids 
Sertularia pumila and S. argentea. 
The seaweeds Rhodymenia palmata (dulse) and Desmarestia are 
plentiful; also beautiful worms, crustaceans, and starfishes. 
A very interesting beach is found a few hundred feet south of 
Otter Cliffs, to which an easy descent is made if one follows a 
pathway leading to it through a grove adjacent to the drive. 
Here one will be interested in the study of numerous and beauti- 
ful rock pools. 
Sea-urchins (Strongylocentrotus drobachiensis) seem to carpet 
some of them, having the appearance of mossy tufts. Beautiful 
pink and purple starfishes (Asterias vulgaris), brittle-stars (Ophio- 
pholis aculeata), sea-cucumbers (Pentacta frondosa), sea-anemones, 
and crabs are abundant. If one lifts a stone the little crusta- 
ceans Orchestia and Gammarus will hurry away, and very likely 
an interesting worm or a nudibranch will be found. It is also 
most interesting to watch the barnacles, which are below the 
surface, reaching out their curled, feather-like feet in regular 
rhythmic grasping motions. The common mussels (Mytillus edu- 
lis), which in places blacken the shore, are beautiful under 
examination, and the silky network or byssus which forms the 
anchorage should be observed. 
The rocks are hung so plentifully with Ascophyllum nodosum 
(rockweed) that its beauty is likely to be passed over unnoticed. 
On the Ascophyllum is growing in tufts Potysiphonia fastigiata ; 
other seaweeds,Rhedymenia-palmata, Chordarta-flageliforms, Des- 
menestia——aculeata, Coretina—oficinatts, and Ceramium, are so 
abundant that one forgets to value them at the moment. Higher 
up on the beach the rocks are spotted with papery sheets, which, 
floated out in water, prove to be the beautiful purple Porphyra. A 
fine, dark colored, hairy scum on the rocks is Bangia fusco-purpurea. 
Sometimes one finds here fronds of Laminaria which have been 
washed ashore. Various green alge are abundant. Even if not 
collecting, it is well to carry a small tin pail to the beach and 
float out pieces of the alge in order to observe carefully, if but 
for a moment, the beautiful forms they have in their natural state. 
Watched for a few minutes in a pail of water they disclose curi- 
