128 Field Museum or Natural History — Reports, Vol. IV. 



essential organs; natural size flowers in three stages of development, 

 and another separated to illustrate the peculiarities of the floral 

 envelope. The balance of the case is occupied by mounted branch- tips 

 of various large species, showing in each instance natural clusters of 

 ripe fruits characterizing various groups in this large order. The 

 Mangrove Family (Rhizophoracece) has been augmented by a model 

 showing the life-cycle of the Mangrove (Rhizophora Mangle); flowers 

 and fruits; seeds germinating while the fruit is still on the tree, and the 

 elongated downwardly projecting radicle; free floating and fixed seed- 

 lings; roots dropping perpendicularly from the branches. An enlarged 

 model of the flower; a pistil in vertical section, and reproductions 

 showing different stages in the germination of the seed are incorporated 

 in the installation. See Plate XXII. In a number of other cases the 

 installed material has been augmented through new elements, and the 

 labelling has been kept up in all. The congested condition of the her- 

 barium has been temporarily relieved by transferring a portion of 

 the collection to the first gallery, thus giving sufficient case-room for 

 a distribution of all inserendcE on hand and to accommodate the growth 

 of the collection during the coming year. This arrangement infringes 

 to a certain extent upon the space of the workrooms and renders refer- 

 ence to herbarium specimens somewhat less convenient, but it enables 

 further organization of the rapidly growing herbarium to continue. 

 The labors of the Geological staff were chiefly devoted during the year 

 to the removal of the major part of the collections from the West 

 Annex to the Main building. Twenty halls were vacated and the 

 specimens and cases which they contained were, after their removal, 

 for the most part reinstalled. It is gratifying to state that this work 

 was accomplished without the slightest injury to specimens or cases. 

 More than two hundred cases with their contents, many of them of 

 great weight, were moved, and in addition the Department library, 

 paleontological laboratory. Department offices, and a large quantity 

 of stored material, apparatus, etc. The disposition of the contents 

 of the Halls in order was as follows: From Hall 6i, four cases and 

 the Glyptodon mount were moved to Hall 36. From Hall 62 the 

 collection of meteorites was moved entire, with the exception of one 

 case, to Alcove 106. The systematic minerals. Halls 63 and 64, were 

 moved to Halls 30 and 31, with the exception of two cases placed in 

 Alcove 105. The collections illustrating structural geology. Hall 65, 

 were moved to Hall 31, with the exception of the gypsum cave, which 

 was moved to Hall 36. The limestone cave and exhibit of basalt 

 columns in this Hall were dismantled and placed in storage. The 

 rock collection. Hall 66, was moved to and installed in Hall 35. The 



