Marsh — Recent Observations on European Dinosaurs. 415 



in this unique specimen that years before I had detected the 

 embryo, and this fossil still affords the only known evidence 

 that Dinosaurs were viviparous. I could find no other Dino- 

 saurian bones of interest in the Munich collection, the new 

 features being mainly numerous fine specimens of Mosasauria 

 from America, and some interesting remains of Hesperornis 

 and Baptornis from the same horizon in Kansas. 



I was much pleased to see here the new Jurassic fossils col- 

 lected by Hansen in 1896, at Cape Flora, in Franz Josef Land. 

 These interesting remains are now under investigation by Dr. 

 J. F. Pompeckj, assistant in the Munich museum. I could 

 detect no vertebrate fossils among them, although various 

 indications favor their presence in this fauna. 



Paris. 



My limited sojourn in Paris gave me no opportunity for a 

 careful examination of the museums there, but I could learn 

 of no recent additions of Dinosaurian remains since my last 

 visit two years before. 



Caen. 



I next went to Caen, in .Normandy, to see the famous 

 Dinosaur Poikilopleuron, so well described by Deslongchamps 

 many years ago. Through the kindness of my friend Professor 

 A. Bigot, I had a good opportunity to study this unique speci- 

 men, which of late has been regarded as identical with the 

 Megalosaurus of Buckland, the first genus of Dinosaurs 

 described, and one about which little is yet known. 



Among the undetermined material of this museum, I was 

 greatly pleased to find the genus Pleurocmlus well represented 

 by characteristic fossils, and from a well-defined Jurassic 

 horizon in the vicinity of Havre. The species appears to be a 

 new one, somewhat smaller than Pleurocmlus suffosus from 

 the Kimmeridge of Swindon, England. It resembled still more 

 closely Pleurocmlus nanus, which I have described from the 

 Potomac formation of Maryland. 



Pleurocmlus is one of the most characteristic genera of the 

 Sauropodous Dinosauria, and its value in marking a geolog- 

 ical horizon should therefore have considerable weight. 

 It is now known from the two European localities mentioned 

 above, both in strata of undoubted Jurassic age. ' The same 

 genus is well represented in the Potomac deposits of Maryland, 

 and has been found, also, in the Atlantosaurus beds of Wyo- 

 ming, thus offering, with the associated fossils, strong testimony 

 that the American and European localities are in the same 

 general horizon of the upper Jurassic. 



Am. Jour. Sci.— Fourth Series, Yol. IY, No. 24.— Deo., 1897. 

 29 



