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



of Anthurium; ii6 flowers and buds of Aloe in all stages of develop- 

 ment; 300 minute stamens of the Pomegranate; 125 enlarged stamens of 

 the same; 150 minute ovules of Carica, etc.). 



In Higinbotham Hall some specimens of gems and gold have been 

 installed and a spring button operating outside the case has been pro- 

 vided for one of the specimens of chalcedony containing liquid. In 

 Hall 35 a representative series of the sponges of the Head Collection 

 has been installed. The specimens exhibited occupy one wall case. 

 For the most part the specimens are mounted on standard black board 

 tablets, but species possessed in an especially large number are shown 

 massed. Species especially well represented are several of Astylospongia, 

 Hindia sphaeroidalis and Palaeomanon crater a. Among Trenton 

 sponges the genus Zittelella is well represented. Polished sections of a 

 number of sponges with lenses mounted before them in order that the 

 beautiful interior structure may be better seen also form a part of the 

 exhibit. In Hall 36 some of the most striking specimens of the Bur- 

 lington crinoids obtained in the Fultz collection have been installed in 

 a floor case. The specimens have been, for the most part, mounted 

 on tablets, about eighty of which are in use, and a typical exhibit of 

 these beautiful forms has thus been obtained. Another change in this Hall 

 has been to move the miscellaneous Triceratops bones to a case adjacent 

 to the skull. In order to obtain room for the exhibition of the increasing 

 number of Tertiary fossil mammals obtained in successive Museum 

 expeditions, a complete readjustment of the wall cases in Halls 36 and 

 59 has been made and the specimens in them rearranged. As now 

 arranged an entire case is devoted to the White River vertebrate fossils, 

 and two cases to Loup Fork vertebrate fossils. Among the important 

 specimens of Loup Fork age placed on exhibition here for the first 

 time are a complete skeleton of Promerycochaerus obtained by the 

 expedition of 1906 in Nebraska, and a skeleton of the Miocene camel- 

 giraffe Oxydactylus longipes obtained at the same time in Wyoming. 

 The Promerycochaerus skeleton is fully articulated and mounted stand- 

 ing; that of Oxydactylus has not been articulated and is exhibited 

 in a prone position. The Promerycochaerus skeleton is one of few 

 mounted ones in existence. The animal was a member of the 

 Oreodont group, of which it was one of the last and largest representa- 

 tives. The whole group became extinct before Pliocene time. In 

 Hall 60 a number of specimens representing extinct whales and dugongs 

 of Florida have been placed on exhibition. In Hall 61 the position of the 

 Glyptodon mount has been changed so that a broader passageway is 

 secured. In Hall 62 the Ahumada meteorite and some smaller spec- 



