86 Scientific Intelligence. 



10. The Hell Creek Beds of the Tipper Cretaceous of Mon- 

 tana ; by Barnum Brown. Bull. Amer. Mas. Nat, Hist., vol. 

 xxiii, art. xxxiii, pp. 823-845.— In an excellent paper, Mr. Brown 

 unravels the rather perplexing stratigraphy of the Hell Creek 

 beds, which seem to be of similar age to the famous Ceratops 

 beds of Converse county, Wyoming. The evidences for this 

 comparison are lithological similarity and the fact that most of 

 the genera and many species of vertebrates and invertebrates are 

 common to both localities. 



Of the vertebrate fauna, mammals are extremely rare, being 

 found always in water-worn debris. They may represent river 

 arboreal types. Of the dinosaurs, the Ceratopsia are the most 

 abundant, remains of Triceratops being found from the very 

 base to the top of the beds. At least 200 skulls have been found, 

 but in nearly every case very badly broken. The genus Toro- 

 saurus does not occur in the Hell Creek region, although repre- 

 sented by several specimens from the Converse county beds. (The 

 reviewer would add that none of the later species of Triceratops 

 which were contemporaneous with Torosaurus have been recog- 

 nized at Hell Creek, but the earlier forms like Triceratops serra- 

 tus, brevicornus and possibly horridus were evidently abundant.) 

 The Trachodontidae are also of frequent occurrence and, while 

 rare, the carnivorous dinosaurs were majestically represented by 

 the great Tyrannosaurus rex which also occurs in the Converse 

 county beds. 



In summing up, Brown states that the Denver, Converse county 

 and Hell Creek beds are of contemporaneous age and are all post- 

 Laramie. " Considering the evidence of the organic remains, 

 the invertebrates plainly foreshadow Tertiary and living species. 

 The flora, on the other hand, shows very little affinity with that 

 of the true Laramie below and even less with the Fort Union 

 above. The vertebrates are clearly of Mesozoic affinity." 



R. s. L. 



11. Weber die Dinosaurier der Aitssereuropceischen Trias/ von 

 Dr. F. v. Huene. Geologische und Palaeontologische Abhand- 

 lungen. Neue Folge, Band viii, Heft 2, 1906, pp. 99-156, pis. viii- 

 xxiii, 102 figures in the text. — This valuable quarto, which has 

 since been followed by a somewhat larger paper on the Triassic 

 dinosaurs of Europe, devotes a goodly portion to the American 

 types, especially those of the Connecticut valley, most of which 

 are preserved in the Peabody Museum of Yale University. Follow- 

 ing the list of genera and species referred to extra-European 

 Triassic Dinosauria is a section disposing of forms wrongly re- 

 ferred to this group. Of these the American types are Clepsy- 

 saurus pennsylv aniens Lea, which v. Huene refers to the Para- 

 suchia; Bathygnathus borealis Leidy, which, in agreement with 

 Case, is referred to the Pelycosauria. Arctosaurus osbomi Adams 

 is not a dinosaur, while Dystrophmus viamxalw Cope proves to be 

 a Jurassic Sauropod. 



The second section includes an excellent discussion of the so- 

 called Connecticut valley forms in which the very complete speci- 



