EXHIBITION COLLECTIONS 35 



sic Dinosaur, Plateosaurus, from Germany. This is the first specimen 

 of this genus to be mounted in this country, and the mount is pe- 

 culiarly graceful as well as scientifically convincing in all its details. 

 Near this mount is shown the skull of a magnificent horned Dinosaur, 

 geologically the most recent Triceratops ever found. 



Room 156 



Fossil Invertebrates 



This room has been arranged as an aid to the teaching of inverte- 

 brate palaeontology. The visitor will find synoptic exhibits of the 

 various groups of invertebrate fossils, well labelled, and with restora- 

 tions to show the way the animals appeared in life. Many of these 

 individual specimens are too small and apparently inconspicuous to 

 attract attention, at first, but a careful examination will reveal a 

 host of specimens of great beauty and perfection of preservation. 

 The Museum is most fortunate in having had great stores of material 

 from which these exhibits have been chosen. The fossil insects, the 

 trilobites, and the echinoderms are especially noteworthy. 



Room i 54 

 Fossil Vertebrates 



In this room are shown some of the primitive fish and fish-like 

 vertebrates. The great head of Dinichthys is one of the finest ever 

 found. This creature was probably not unlike a giant catfish in ap- 

 pearance. The bony head coverings are shown, the rest of the skele- 

 ton being of cartilage. It must be emphasized that Dinichthys was 

 not a true fish — let alone a catfish. Its exact zoological position is 

 uncertain. 



The large, sluggish, mollusc-feeding, lizard-like Diadectes is note- 

 worthy as being a rare find from the Permian of Texas. It represents 

 a group of very primitive reptiles called the Cotylosauria. 



The fossil tortoises are good, as are also the small flying lizards in 

 the case by the window. The Ichthyosaurs on the wall were porpoise- 

 like reptiles which swarmed in the Triassic Seas. In this room, as in 

 the other rooms devoted to vertebrate fossils, extensive changes are 

 planned as specimens now in the Museum are, one by one, mounted 



