G. R. Wieland — Notes on the Armored Dinosauria. 113 



And indeed from this second instalment of the type much 

 more has been learned than might have been anticipated. In 

 it, as enumerated below, nearly every part of the skeleton is rep- 

 resented. In fact, after careful search and reuniting of many 

 separated fragments, it is found that although much of the 

 new material, especially of the limb bones, is too much weath- 

 ered and broken to permit restoration, there are present far 

 more than twice as many complete elements as were first 

 secured ; while taking both collections together, quite one- 

 third of the entire armor is directly indicated, and inferentially, 

 more than half. To the description of this new material we 

 may now turn with the remark that the recovery of such a 

 large part of the armor in intimate association with the skele- 

 ton assures us that the Niobrara must in time yield finely con- 

 served armored saurians. 



Further Structures of Hierosaurus. 

 Figures l-3a. 

 The additional portions of the skeleton of Hierosaurus 

 described herein have the same general surface characters and 

 features of weathering as the plates first collected, and are to 

 be regarded as part of one and the same type. They come 

 from the same locality, and so far as I can determine represent 

 but a single animal, with the exception of the caudal hands 

 shown in the first description (cf. figures 7, 7a, loc. cit.). 



As forwarded by Mr. Sternberg, this second instalment 

 includes the following skeletal parts : 



(a). One large flat caudal spine of isosceles triangular form 15 

 centimeters high with a base 13+ cm. long. Base some- 

 what crushed but showing clearly outlined surface of 

 attachment about 4 cm. wide. (Cf. fig. 3, 3a.) 

 (b).. Distal half of a somewhat lower spine than the preceding, 

 (c). Two portions of summits of spines of moderate to large size. 

 (d). A low set spine strictly intermediate in form between the 



pi'eceding and following (fig. lb), 

 (e). One elliptical and ridged dermal plate 10X15 cm. (fig. lc). 

 (/). A subrhombic dermal plate like e, 9X15 cm. 

 (</). Four oblong elliptical elements ranging from 9 to 11 cm. 

 long and from 3 to 5 broad, and having a submedian ridge 

 varying from a shallow sigmoid (fig. 2e) to a crescent 

 (fig. 2/j g), the latter form being doubtless one of the 

 most anterior in which the tendency to form a poste- 

 riorly set spine is clearly marked. 

 (A). Three smaller oblong ridged elliptical elements about 



8X3 cm. (fig. 2, a-c). 

 (i). Series of twenty-five incomplete plates like the two pre- 

 ceding groups. Length average 8 to 10 cm. 

 (j). About fifty additional fragments of smaller elongate ridged 

 plates, less than 10 cm. in length. Some must be portions 



