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Diagram of portion of bone-quarry near Canyon City, Colorado, showing positions of Haplo- 
canthosaurus priscus and H. utterbacki when found .............-.2.2 0 eee eects 4 
Diagram of portion of bone-quarry near Canyon City, Colorado, worked for Carnegie Museum — 5 
Sixth (?) dorsal of type of Haplocanthosaurus priscus seen from right side.......... 10 
EhirsieWorsaluotelaponiscis seen tromericint sides a) 1 ae ciee era ae 10 
Superior view of sacral, anterior caudal, and posterior dorsal, or lumbar, of Menopoma 
CHG WG UCTISIS) 558 i) ol ocd eiteren cena upc See eee eee Sl ae ee tenn a a nadie eed ola ain 21 
Superior view of sacrum, anterior caudal, and posterior lumbar or dorsal of Iguana tuberculata 21 
Chevron of Haplocanthosaurus between caudals 8 and 9, side view........0....0.-.-055- 23 
Chevron of Haplocanthosaurus between caudals, posterior view........ 0.020220 e eee eee Py) 
Chevron of Haplocanthosauwrus between caudals 13 and 14, side view..............-..--- 23 
Chevron of Haplocanthosaurus between caudals, posterior view... .....- 0+. 200+ 00e ress 23 
Anterior view of second (?) rib of right side of Haplocanthosaurus.... 0.050000 0020 eee eee 24 
Anterior view of fourth (2) rib of left side of Haplocanthosawrus.... 0.06.0. 0000 eee cee 24 
Anterior view of thirteenth (?) rib of left side of Haplocanthosaurus. 0.0.0... 000 eee eee 24 
Left femur of Haplocanthosaurus priscus, front view......... ++ 0+. . 002-022 ee 27 
Sacrum of Haplocanthosaurus utterbacki, seen from right side........0...2. 20000 eee 36 
Anterior view of disarticulated parapophyses (sacral ribs) of Haplocanthosaurus utterbacki.... 36 
Rostenionaviewsotmlettiscapula oil anterbackinniaar in = see sane. title aen ere 42 
Bcretna laviewaotslettyscapulaoimlarutterbackine tl. ys) a eee eae ae ae oar ee 42 
external pviewaormohtreoracoidl ois utlerbackiness-)) ats yeasts as 2a een ee 42 
Centrum of fourth sacral of H. utterbacki seen from right side........-....... 022-005 51 
Dcapulecnole C chrosatmisitonguss Owens aetna cine aaa cet oo lemons sear -ee = ee TE ate 52 
Comencl OF Ognonairis (Ongiay OVGis ann sopemeeeeunoeemadsasaatpedcebouobbgcass co 53 
Photograph of footprint in Jurassic sandstone, near Canyon City, Colorado............... 61 
Photograph of ripple-marks on surface of Jurassic sandstone, Big Horn Mountains, Wyoming 62 
View of Atlantosaurus beds, entrance to Garden Park, near Canyon City, Colorado........ 63 
The “ Nipple,” showing in foreground trench cut by Professor Cope in collecting Dinosaur 
TRETTEDINNS 6c Gaara octet aa Orc thay ers Glee Pea ERE GE ERE Re ECE Sera MIC ammIN Ente With nlp ola! a5 8 64 
Biss CEHmenirance toy COpexqUannky ete sce cies ccciae cca o 4a seals obennlen keys tuate es? cae nee Rei Rare 65 
View from near Cope quarry with the “ Nipple” in foreground, Cooper Mountain in the dis- 
ienaee, Cauclen letyAke logy tae CIN VO”G5e050ce00805G0c0000000G0C000GnG0000 He 66 
Inaxhing aia! wlban, ow JDiyailocltenn. 66 code so cenoecsconcadnaaeeobnuos I teeny 73 
Ep POsednclaviclesols Wiplodoctss: seni s ay shcneyes oi oeiyo/eie siete ala ch pene perenne ey eavaterey S/ ae ae LSE 73 
