It is a duty, and a pleasant one, to record, though unfortunately in memoriam, my association with Arthur Erwin Brown, A.M., Sc.D., Ph.D., C.M.L.Z.S., for many years the Secretary of the Society and Executive Officer of the Garden. Doctor Brown as teacher was ever ready to help in the broad subject of biology, and I am proud to recall that he guided me also as a friend. The first director of the Laboratory was Courtland Y. White, A.M., M.D., who served from 1901 to 1906, retiring then to accept a position in the City Laboratory. The foundation of the recording system is still in use essentially unchanged from his plan, and is a credit to his foresight. Our clerk and technician, Miss Harriet M. Phelps, has served the Garden faithfully and well since 1906. The condition of the museum is very much due to her interest and watchfulness. Thanks and appreciation for her work are felt by every one, the author most of all. Dr. F. D. Weidman has been our first assistant since 1911, and his work on parasitology has been of the greatest value, practically and scientifically. It is to be hoped that we shall be able to retain him indefinitely. Dr. E. P. Corson-White has in recent years taken an assistant position with us, armed for the work with a thorough knowledge of applied organic chemistry and immunology, and has already obtained useful results. ZOOLOGICAL CLASSIFICATION │ MAMMALIA PLACENTALIA PRIMATES _Simiadæ_ Anthropoid apes _Cercopithecidæ_ Old World monkeys (macaques, baboons). _Cebidæ_ New World monkeys (capuchins, howlers, spiders). _Hapalidæ_ New World monkeys (marmosets). LEMURES _Lemuridæ_ Lemurs, Loris, Galagos. CARNIVORA _Felidæ_ Cats _Viverridæ_ Civets, Genets, Paradoxures, Ichneumons. _Hyænidæ_ Hyena. _Canidæ_ Dogs, Wolves, Foxes, Jackalls, Etc. _Mustelidæ_ Marten, Skunk, Weasel, Otter, Badger, Etc. _Procyonidæ_ Raccoon, Bassaris, Coati, Kinkajou. _Ursidæ_ Bear. _Otariidæ_ Eared Seal, Sea Lion.│These are grouped │separately as suborder, │PINNIPEDIA, illustrating │water carnivores. _Phocidæ_ Common Seal, Walrus. │ „ INSECTIVORA _Tenrecidæ_ Tenrec. _Solenodontidæ_ Solenodon. _Talpidæ_ Moles, Shrews. _Erinaceidæ_ Hedgehog. CHIROPTERA _Pteropodidæ_ Fruit Bats, “flying foxes.” _Vespertilionidæ_ Common bats. _Emballonuridæ_ Snouty Bats, Free-tailed Bats. RODENTIA _Sciuridæ_ Squirrels, Spermophiles, Marmots.