moodie: armored cretaceous dinosaur. 271 



drawing of Stegosaurus ungulatus, is not accurate as to the 

 form of the animal. The pelvic region was undoubtedly cov- 

 ered over with a heavy shield as in Stegopelta. Indeed, 

 Doctor Willistonf says, "Ankylosaurus is either very closely 

 allied to or identical with Stegopelta Williston, a genus over- 

 looked by Mr. Brown." 



The remains described by Mr. Brown consisted of a skull, 

 some small dermal scutes, a few vertebrse, a scapula, a few 

 ribs and other parts, most of which were lacking in the above- 

 described animal. 



Dr. O. Abel has given (Verhandl. d. k. k. Zool.-bot. Gesell. in 

 Wien, Bd. LVIII, p. 215, fig. 3) a restoration of Ankylosaurus 

 magniventris Brown. It is to be doubted if he has added to our 

 knowledge of dinosaurian attitudes, since the reader is at once 

 struck with the grotesque and impossible attitude which he has 

 caused the animal to assume. It is unfortunate that Brown's 

 ideas of the arrangement of the scutes on the back should have 

 been given by Doctor Abel, since there is not the slightest evi- 

 dence that they assumed anything like the arrangement he has 

 represented. 



The other dinosaur is from the Niobrara Cretaceous of Kan- 

 sas and was collected by Mr. Charles Sternberg in the Hack- 

 berry creek region. 



Doctor Wieland$ describes these remains as Hierosaurus 

 sternbergii, new genus and species. This form is also doubt- 

 fully distinct from Stegopelta, unless it be that the skeletal 

 characters were widely at variance to the characters of the der- 

 mal plates. A comparison of figure 9, plate LVI, of the present 

 essay, with Doctor Wieland's figure 6, will show how very 

 closely the dermal elements of the animals resemble each other. 

 Comparisons also of the figures on plate LVII of the present 

 paper with Doctor Wieland's figures 2, 4 and 5 will reveal the 

 close similarity of the small dermal elements. It would, how- 

 ever, be too previous to say certainly that Hierosaurus and 

 Stegopelta are identical. The geological horizon of the two 

 specimens is certainly not far apart, or perhaps identical, since 

 the Hailey shales occupy relatively the same position in Wyom- 

 ing as the Niobrara chalk does in Kansas. 



t American Naturalist, vol. XLII, No. 501, p. 629. 



+ Wieland, G. R., 1909. Amer. Jour. Sci., March, p. 250. 



a-Univ. Sci. Bull . Vol. V, No. 14. 



