upon which Sir Walter L. Buller based his second edition of “The Birds of New Zealand,” is here. The gallery of reptiles is on the first floor in the south- eastern corner of the building. The museum has over 9,000 specimens of reptiles, mainly from temperate North America, but there are many from Central and South America. Among the most striking groups are the diamond-back rattle snakes, collected in Texas, and the boa-constrictors from the Isle of Pines. The hall of fishes occupies the southeastern corner of the building on the first floor. The great part of the collection of fishes and reptiles is contained in the so-called “Alcoholic Store-Room,” annexed to the building as a precaution against fire, The museum has one of the most important collections of South American fishes and the largest collection of Japanese fishes in North America. Here are the sponges, marine and freshwater shells, echino- derms, and other invertebrates. The exhibition series is locat- 2d on the second floor in the southeastern corner, over the gallery of reptiles. Most of the collections are preserved in rhe Laboratory of Invertebrate Zoology, on the third floor. The shells include various important collections contain- ing the types and co-types of many species described by early American authors, and an enormous series of the Union- ‘dz of the Mississippi Valley. There are thousands of species »f land and freshwater shells, and great collections of Crus- tacea, etc. A few of the insects are shown on the second floor, but most of the collections are contained in the Laboratory of Entomology on the third floor. There are many thousands of species of butterflies in the collection deposited by Dr. W. J. Holland, director emeritus. The museum also owns the Coleoptera of North America gathered by the late Henry Ulke of Washington, 11,000 species, represented by 110,000 specimens; the Coleoptera assembled by the late Dr. John Hamilton of Pittsburgh; and vast collections of the insects of other orders made in all parts of the globe, acquired either by purchase or gift. There are not less than 1,500,000 speci- mens of insects, representing approximately 150,000 species, including thousands of types and paratypes.