HATCHER: ADDITIONAL REMARKS ON DIPLODOCUS TD 
The cervical vertebra figured by Marsh and reproduced as text Fig. 24 in my 
memoir on Diplodocus, although referred by Marsh to Diplodocus longus, is now . 
known to have pertained to a species of Brontosawrus instead, and hence is of no 
value in distinguishing the different species of Diplodocus as I then supposed. 
Puate I. 
Puate II. 
Puate III. 
Puate LY. 
Puate V. 
Puiate VI. 
Presacral vertebra of type (No. 572) of Haplocanthosaurus priscus, one tenth nat- 
ural size. Series 1, as seen from right side; Series 2,as seen from in front; 
Series 3,as seen from behind. (C14 and (15, cervicals 14 and 15; 1, first dor- 
sal ; 6-14, dorsals six to fourteen respectively ; pz/, postzygapophysial lamina; oJ, 
oblique lamina; //, horizontal lamina; dl, diapophysial lamina; az/, prezygapo- . 
physial lamina; S, modified surface for muscular attachment of scapula ; t or ¢f, 
tubercular rib facet; ¢ or cf, capitular rib facet, al, inferior blade of diapophy- 
sial lamina in first dorsal and prespinal lamina in sixth dorsal. 
Vertebrae of type (No. 879) of Haplocanthosaurus utterbacki, one tenth natural 
size. Series 1 and 2, dorsals; 3 and 4, cervicals; 5, anterior caudals. 
Nineteen anterior caudal vertebra of type (No. 572) of Haplocanthosaurus priscus, 
one tenth natural size. Series 1, seen from right side; 2, seen from in front; 3, 
from behind. 
1. Pelvis of Brontosaurus excelsus (No. 563); 2. Pelvis of Diplodocus carnegii 
(No. 94); 3. Pelvis of Haplocanthosaurus priscus (No. 572). All one tenth 
natural size and seen from left side. i/., ilium; p. p., pubic peduncle; 7. p., ischial 
peduncle; g.c., acetabulum; pb., pubis; is., ischium; a., anterior extremity ; p., 
posterior extremity; 1, 2, 3, 4, 5, spines of first, second, third, fourth and fifth 
saerals. 
1. Inferior view of sacrum of Haplocanthosaurus priscus with ilia attached (No. 
572). a, anterior end; p, posterior; pp, pubic peduncle; is, ischiac peduncle ; 
pfs foramen between ilium and parapophyses of first sacral. 
2. Anterior view of pelvis of same with ischia detached. pp, pubic peduncle; p, 
pubis; ps, pubic symphysis; pt, pubic foramen. 
3. Posterior view of same, with pubis detached and anterior expanse of ilia not 
shown. ip, ischiac peduncle: is, ischium. All one tenth natural size. 
Restoration of Diplodocus carnegiti Hatcher. 
From material in the collections of the Carnegie Museum, one thirtieth natural size. 
