This pool in Anemone Cave, although so very attractive, is surpassed in beauty and interest by pools on Porcupine Island, at the base of the cliff. This place is somewhat difficult of access, and the timid will not undertake the descent to it; but the enthusiastic collector, who overlooks small obstacles, will be repaid by a visit to this spot, where all the treasures of Anemone Cave are multiplied many times over. These pools are resplendent with large anemones, hydroids, nudibranchs, mollusks, echinoderms, crustaceans, and algæ. /Alaria esculenta/, several feet in length, is beaten to a fringe against the rocks, and /Agarum Turneri/, the sea-colander, is also found here, together with beautiful specimens of /Rhodymenia palmata/, which is so plentiful that it reddens the rocks. A /Metridium marginatum/, the most common sea-anemone of this coast, was taken here which measured six inches in diameter. This creature threw out so many of the processes used for defense that it seemed at first as though it were covered with some seaweed; but the worm-like movements of these threads, which measured six inches or more in length, soon disclosed their nature. On the more accessible shores of Porcupine Island are found the naked mollusks (nudibranchs) /Æolis/ and /Dendronotus/. Clinging sideways to the rocks just above high-water mark are many shells of /Littorina rudis/. They are fastened to the rocks by a glutinous deposit along the outer lip, and the peculiar exposure of the open end, as well as the position above tide-mark, indicates that this animal is undergoing transformation into a land species. /Littorina palliata/ is abundant on the rockweeds (/Fucus/); some of the specimens are banded with yellow, and all closely simulate the seaweed on which they cling. Beautifully banded specimens of /Littorina litorea/ are also plentiful. Among other shells which are abundant here as well as elsewhere on this coast are /Purpura lapillus/, /Acmæa testudinalis/, /Buccinum undatum/, /Mya arenaria/, and /Mytillus edulis/. [pg043] Under the rockweeds in small pools and crevices are the polyzoans /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 beautiful rock pools.