80 Notices of Memoirs — Prof. 0. C. Marsh — 



the Loess presents traces everywhere of a great diluvial movement. 

 I cannot follow him in attributing it to the Glacial period, and to the 

 bursting of a huge barrier of ice letting loose the waters of a great 

 inland lake. All this seems to me to be at issue with the evidence, 

 but I must claim what he says as to a great debacle, as, in fact, a 

 proof of my position as a Post-Glacial flood. Of this debacle he says : 

 " It is to the first rising of the waters that I attribute the destruction 

 of the Mammoth and the Woolly Rhinoceros, and probably of Palseo- 

 lithic man in Europe. The evidence is perhaps not so conclusive 

 with regard to Palaeolithic man, but as concerns the two great 

 quadrupeds it is clear and decisive. I can find nowhere in Europe a 

 trace of their existence after the first rise of the waters. In the 

 great debacle their bones were carried and spread out over the low 

 grounds along with the lowland gravel, and, doubtless, often carried 

 into the top of low-lying patches of Boulder-clay, but in these cases 

 they are broken, single, or rolled" (Belt, op. cit. p. 89). 



Sporadic inundations and floods are also postulated over and over 

 again in the pages of Mr. Geikie as periodical effects of the melting 

 of ice, etc. ; but the fact is, if we are to find a cause which operated 

 uniformly from the Yellow Sea to the Atlantic, and left no traces 

 of intermittent action great or small, but uniform unstratified 

 mantles of deposit, marking one substantive and supreme cause, we 

 must forego these local and fragmentary predicates, and postulate one 

 overwhelming flood, such as is demanded by the evidence we have 

 collected from other sources. I propose, in another paper, to deal 

 with the so-called Diluvium of the French and Russian writers, and 

 its correlated deposits. 



Note. — I would add from Mr. Belt's paper, another example of the 

 occurrence of a slceleton of what was doubtless a Mammoth to those 

 already cited in a former paper. He says, " It is related that when, 

 in the Thirty Years' War, the Swedes were besieging Krems, they 

 found in one of their trenches the skeleton of a monstrous animal, 

 and that besiegers and besieged ceased from their warfare for a time 

 to gaze on the huge teeth of the giant that had been dug up " (op. 

 cit. p. 73). 



ITOTIOiES OIP DVLlBn^OHaS. 



Classification of the Dinosauria. By Prof. 0. C. Marsh, 

 M.A., F.G.S.i 



IN the May number of the American Journal of Science (p. 423), I 

 presented an outline of a classification of the Jurassic Dinosaurian 

 Reptiles of this country which I had personally examined. The 

 series then investigated is deposited in the Museum of Yale College, 

 and consists of several hundred individuals, many of them well 

 preserved, and representing numerous genera and species. To 

 ascertain how far the classification proposed would apply to the 

 material gathered from wider fields, I have since examined various 



1 Eead before the National Academy of Sciences, at the Philadelphia meeting, 

 November 14, 1881. 



