260 KANSAS UNIVERSITY SCIENCE BULLETIN. 



ton and myself a number of elements of the skeleton have been 

 reconstructed. 



The specimen as it now stands consists of the following 

 parts : Fragments of the upper and lower jaws with a dozen 

 or more teeth, most of which are fragmentary; seven frag- 

 mentary dorsal vertebrae ; portions of the sacrum ; two caudal 

 vertebrae; many fragments of the ribs; a complete ulna be- 

 longing to the left side ; portions of the right ulna ; portions of 

 the radii ; the left ilium nearly entire ; a part of the right ilium, 

 showing the acetabulum ; the right pubis nearly entire ; a por- 

 tion of the left pubis ; the lower portion of the right tibia ; the 

 upper and lower ends of the right fibula ; many large fragments 

 of the metatarsals ; nearly a hundred small bony scutes ; several 

 large bony plates, girdles and bony spines representing va- 

 rious portions of the dermal armor; together with a great 

 quantity of waterwom fragments which it is impossible to 

 determine. 



The remains described as Stegopelta landerensis indicate a 

 stegosaurian dinosaur about two-thirds the size of Stegosaurus 

 ungulatus Marsh. The head was small, as is indicated by the 

 size of the teeth. The fore limbs were not relatively so large 

 as in Stegosaurus. The entire pelvic region was covered with a 

 dorsal shield of rather thick, scrobiculate plates with elevated 

 centers which are asuturally united over the pelvis. On each 

 plate there is found, either on one side or in the central emi- 

 nence, a pit, which possibly supported a more or less elongate 

 horny spine. Anterior to the pelvic shield there were many 

 dermal plates and scutes of various sizes scattered over the 

 dorsal region of the body. The anterior portion of the animal 

 appears not to have been armed. Back of the pelvis there were 

 massive dermal plates, huge bony spines and a bony girdle 

 probably encircling the tail in some such manner as in the 

 glyptodonts. The neural spines of the caudal vertebrae were 

 probably each surmounted by an elongate bony plate which 

 quite possibly bore a horny excrescence of some kind. While 

 closely sim^ar in many respects to Polacanthus, Stegopelta 

 shows wide structural differences from that form, although it 

 must have had much the same appearance as Nopsca (5) has 

 figured in Polacanthus. The present dinosaur, in life, may 

 have stood nearly seven feet high at the hips and attained a 

 length of sixteen to eighteen feet. Armed as it was with horns. 



