NO. 1878. MOUNTED SKELETONS OF CAMPTOSAURUS—QILMORE. 693 



shown in diagram 7, some 14 feet to the east of No. 174; but an an- 

 terior zygapophysis, retamed in place by the matrix of the latter, 

 was found to fit on the first vertebra of this series, and so fixed 

 beyond doubt their proper position in the tail. Some 14 or 15 feet 

 to the north and east another series of 18 distal caudals (Nos. 218 

 to 235) was found, most of them articulated or so closely associated 

 that it appears none are missing in the series. 



It is perhaps fortunate that while the other bones in this area 

 represent the remains of several individuals, nearly all pertain to 

 the genus Stegosaurus, from which the elements of Cam'ptosaurus 

 are readily distinguishable. This remark applies particularly to 

 the roimded distal caudals of Camptosaurus, which may at once be 

 distinguished from the short hexagonal caudal centra of Stegosaurus. 

 That this distal series belongs to C. hrowni there can be but little 

 question. The ilia, Nos. 140 and 167, lay on their respective sides 

 of the sacrum and but little removed from it, with their anterior 

 ends directed forward. The other pelvic bones were not indicated 

 on the map, but from their quarry numbers it was determined they 

 could not have been far removed. Nothing of the hind limbs was 

 found. The right fore limb (and foot) Nos. 98, 101, 119, and 120, 

 were found to the west and right of the anterior cervicals. From 

 the fact that all of the elements pertain to a right limb and closely 

 agree in size with the left, its assignment appears certain. Some 

 scattered ribs and pieces found near the dorsals have been pro- 

 visionally associated with them. All of the remaining material 

 from diagrams 5 and 7 has been gone over carefully in the hope 

 of finding some elements of the skull and other missing parts, but 

 without reward. It appears remarkable that in a skeleton which 

 shows so little displacement of the elements as this one that the 

 heavy bones of the hind limbs should be missing. An unusual 

 feature is the preservation of both fore limbs and feet. Experience 

 of several seasons' field work has shown that while it is not unusual 

 to find hind limbs fairly complete, the front legs, particularly of 

 the Jurassic sauropods, are rare. 



By reference to the quarry map (see pi. 55), all of the evidence 

 as to the association of the parts may be plamly seen. The bones 

 not numbered pertain to one or more genera different from Campto- 

 saurus. The series to the east of the vertebral column represents a 

 caudal series of Stegosaurus, and most of the other scattered elements 

 have been recognized as belonging to that genus. With the excep- 

 tion of two caudal vertebrae, no duphcate bones of Camptosaurus 

 have been found. There can be therefore little question but that a 1 

 of the elements indicated as Camptosaurus belong to one individual. 



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