VERTEBRATE PALEONTOLOGY MATTHEW 277 



in new excavations at Trossingen during the past two seasons, of a 

 series of a dozen or so more or less complete dinosaur skeletons likely 

 to be of great scientific value. Scarcely less important is a large 

 quarry of skulls and skeletons of the great Triassic labyrinthodont 

 Mastodonsaurus, in the Black Forest region by Professor Wepfner, 

 and the discovery of complete skeletons of the very peculiar reptile 

 Placodus, whose teeth were found long ago in Germany and supposed 

 to be the pavement-teeth of a fish allied to the rays. This fine skele- 

 ton is being studied by Doctor Drevermann, of the Senckenberg 

 Museum. 



JURASSIC DINOSAURS OF UTAH AND EAST AFRICA 



The two outstanding features of progress in Jurassic land reptiles 

 are the great dinosaur quarry worked by the Carnegie Museum near 

 Jensen, in the Vernal Valley, Utah, and the Tendaguru dinosaur 

 collections from German East Africa secured for the Berlin Museum. 

 So far as I can judge from the record maps of the Jensen quarry, 

 which I had the privilege of inspecting through the courtesy of Mr. 

 Douglass, the material secured there is greater in quantity and 

 finer in quality than the sum of all that has been obtained hitherto 

 in America. The preparation of this huge collection will be a labor 

 of many years, however it be arranged ; but as a result we may look 

 forward confidently to more than doubling our present knowledge 

 of Morrison dinosaurs. 



The memoirs by Gilmore 13 on the carnivorous and armored dino- 

 saurs in the National Museum, chiefly of the Morrison fauna, are of 

 the highest authority and importance, and his restudy of the Potomac 

 fauna 14 of Lower Cretaceous age shows that it is not the Morrison., 

 as formerly supposed, but of decidedly later age. The Tendaguru 

 collection is likewise an immense task in preparation, and when I 

 saw it in Berlin, 2 years ago, it was far from being completed, after 

 more than 10 years' work. It provides a fairly complete skeletal 

 knowledge of some half dozen types of dinosaurs 15 and fragments 

 of a few others, representing a fauna similar in broad lines to the 



13 C. W. Gilmore (1920): Osteology of the carnivorous dinosauria in the U. S. Nat. 

 Mus., Bull. 110, U. S. Nat. Mus. ; 1914, Osteology of the armored dinosauria in the U. S. 

 Nat. Mus., Bull. 89, U. S. Nat. Mus.; see also 1909, Osteology of Camptosaurus ; 1915, 

 Osteology of Thescelosaurus, and other articles in Proc. U. S. Nat. Mus. 



U C. W. Gilmore (1921) : Fauna of the Arundel formation of Maryland. Proc. U. S. 

 Nat. Mus., vol. lix, pp. 581-594, pis. cx-cxiv. 



16 W. Janensch (1914): Ubersicht ueber die Wirbeithierfauna der Tendaguru-Schich- 

 ten. Archiv. f. Biontologie, HI, 79-110; also pp. 217-261. Ueber Elaphrosaurus u. s. w., 

 Sitzber. Gesell. Jiaturf. Freunde, 1920, pp. 225-235. 



W. Branca (1914) : Die Riesengrobe sauropoder Dinosaurier vom Tendaguru, u. s. w., 

 Archiv. f. Biontologie, vol. Hi, pp. 71-78. 



Pompeckj (1920-23) : Personal communications. 



B. Hennig (1912): Am Tendaguru; also various articles in Sitzber. Gesell. naturf. 

 Freunde, 1912-1922. 



1454—25 19 



