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In the spring of last year Mr. Shipley brought to Cambridge a few specimens of a
Dinophilus, which he had found in Mount's Bay, near Penzance. These he was kind enough to place at my disposal; and in April last I was able myself to procure a larger number of specimens from the same locality.
The animals were found in considerable numbers on red seaweeds, &c., in pools, near spring-tide low water mark, on the rocks to the west of St. Michael's Mount. The weeds were placed in shallow white basins, with plenty of sea-water, for from twelve to twenty-four hours, when the
Dinophilus left the weed, and were easily seen against the white wall of the vessel, on the side turned towards the light.
