"FAUNA OF THE QOSATJ FOKMATION. 621 



was so fortunate as to obtain the assistance of Bergverwaltcr Paw- 

 lowitsch in conducting excavations. These were carried on with 

 admirable skill ; timber drift-ways were driven into the rocks, with 

 the result that they penetrated into a perfect cemetery of the remains 

 of Cretaceous reptiles. The remarkable collection thus obtained 

 was intrusted for description to Dr. Emanuel Biinzel, whose memoir 

 upon it was published in 1871 in the ' Transactions of the Imperial- 

 Royal Geological Institution.' Subsequently more specimens were 

 discovered; and in Easter 1879 my honoured friend, Prof. Suess, 

 invited me to visit Vienna to examine these specimens, with the 

 object of making them available for the advancement of knowledge 

 by publication. With the assistance of the Royal Society I gladly 

 undertook this work, and spent a month in Vienna studying the 

 thousands of fragments which had been obtained. The great mass 

 of these, mere comminuted bones, proved of but little value ; or, 

 rather, the time that I could give to their study enabled me to piece 

 together but few specimens that were likely to prove interesting. 

 There were, however, other important remains, which Prof. Suess 

 had already reconstructed and pieced together with great patience 

 and perseverance, that had produced many indications of lost animal 

 forms out of a chaos of debris. I soon found that Biinzel's 

 views and my own presented certain differences. His memoir, 

 which extends to eighteen quarto pages, and is illustrated by eight 

 plates, describes the following species — Crocodilus carcharidens, 

 Iguanodon Suessii, Struthiosaurus austriacus, and Danubiosaurus 

 anceps. Other remains are referred to the genera Hylcwsaurus, 

 Scelidosaurus, and Lacerta ; while certain specimens are classed as 

 " Crocodili ambigui," Chelonians, and indeterminate remains. All the 

 specimens which he described are figured ; but the artist has so im- 

 perfectly appreciated the details of character of the fossils represented 

 in Biinzel's plates, that it is impossible to form from them a just 

 opinion of these fossil reptiles. After examining the specimens, I have 

 come to the conclusion that some of Bunzel's identifications may be 

 modified. I am unable to recognize Scelidosaurus, of which Biinzel 

 figures a claw-phalange, tail- vertebrae, and dermal armour. Hylcw- 

 saurus is another genus doubtfully cited, resting upon a single scute, 

 which it may be well to discard. Lacerta is a genus that certainly 

 cannot be recognized, although the author refers to it parietal and 

 postfrontal bones, the articular element of the lower jaw, and the 

 right side of the lower jaw, vertebrae, fragments of ribs, humerus, 

 radius, and femora. But the genus Lacerta could here only be used 

 in the sense of animals of the Lizard group. 



Eor reasons that will be adduced, the Crocodilus carcharidens, 

 founded upon a fragment of the lower jaw, cannot be referred to the 

 genus Crocodilus ; while the Danubiosaurus anceps was founded in 

 error, and the remains, instead of being lacertilian, belong to other 

 orders and other parts of the skeleton than those identified. Stru- 

 thiosaurus being founded on a single specimen, remains an interesting 

 type ; but I feel constrained to refer the Iguanodon Suessii to a 

 distinct genus. 



