Jan., 1920. Annual Report of the Director. 323 



capri-fig, has just been completed. It shows as plainly as such models 

 can the interesting and peculiar story of the pollination of the fig, and 

 the intricate life-history of the minute hymenopterous insect concerned. 

 A flowering branch of Grevillea robusta Australian oak, with the enlarged 

 flowers modeled last year, completes the illustration of the Proteaceae. 

 A simimary of the results of the year's work in this Section is as follows: 

 Reproductions completed and placed on exhibition: Banana, entire 

 plant in flower and leaf; Sprouting cocoanut, entire plant; Carissa 

 grandifloray fruit and flower branch of leaf; Cydonia japondas, branch 

 in fruit and leaf; Scrophularia Marylandica, flower enlarged; Hymeno- 

 calles caribcea, entire plant; Strychnos spinosusj fruit and flower in leaf; 

 Sagittaria latijobiaj flower enlarged; Casuarina equisetijolia, flower 

 enlarged; Casasia clusiifloUa, branch fruiting and leafing; Bombax 

 grandifloray branch flowering and leaflng; Grevillea robusta^ branch 

 flowering and in leaf; Rhizoctonia solani, Macrosporium solani, Phyto- 

 phtora infestanSf Phoma destructimy on Lycopersicum esculentum; also 

 parts of Zamia, Cocoa, Amanas and Gassy pium. 



In the Department of Geology some installation has been performed, 

 chiefly for the purpose of putting some mounts into such condition that 

 they could be moved with safety. To this end, mounting of a large skele- 

 ton of Megacerops was completed and the mount placed in a case in which 

 it is at present exhibited and can probably be transported. This skeleton 

 is made up entirely of the bones of a single individual and is very nearly 

 anatomically complete, only two or three vertebrae being missing. 

 A few of the limb bones were modeled from corresponding parts on the 

 opposite side, but this was done with entire accuracy by casting. The 

 skeleton is the only one of this genus which has as yet been mounted in 

 aiay musetmi, and is the first specimen to show that the members of the 

 genus were long-tailed animals. It was among the most primitive of the 

 Oligocene titanotheres and was about the size of the modem black 

 rhinoceros. The skeleton is mounted in three-quarters relief. The 

 matrix, base and background against which the skeleton is shown have 

 been made of plaster, colored to imitate the greenish clay in which the 

 specimen was found. The plaster has also been tooled in such a manner 

 as to suggest the excavation of the skeleton from the matrix. The 

 posture is that of an animal in life, the skeleton being supported on its 

 feet. The head, neck, torso and right limbs are, however, connected 

 with the background for support, and the feet are partially enclosed in 

 the matrix. Iron rods, made as inconspicuous as possible, have been 

 introduced to support the left limbs. The specimen was collected in 

 South Dakota in 1898 by a Museimi expedition. After dismoimting 

 some of the dinosaur specimens for packing, the opportimity was im- 



