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15 this a large number of old dirty or defective labels have been rewritten, specimens put in new or more suitable tubes or trays or otherwise cleaned, revised and rearranged. This work has been conducted under the supervision and direction of Dr. Stearns and at the same time a large number of the fine land shell collection of the series presented by the late Dr. Isaac Lea has been arranged and administered upon. A large quantity of fine gravel and bottom-stuff, the sifting from deepwater dredgings by the Albatross and other Fish Commission vessels, which is very rich in minute, rare and singular forms, has been picked over, especially by Miss Beard. When it is understood that in a gallon of this material more than a thousand specimens of two hundred and fifty species have been found, of which fully half were unknown to Science, it