AMERICAN JOURNAL OF SCIENCE. 
[THIRD SERIES.} 
Art. IX.—Principal Characters of American Jurassic Dinosaurs. 
Part VI: pect Ppote! if Brontosaurus, (with plate I); by 
Professor O. C. MAR 
In the previous articles of this series, a writer nt given 
the more important characters of the order Saur A 
volume on this group is now in pre Seaton, ‘end the Thastbe 
tions (90 Pace are nearly completed. One of these is a resto- 
ration of Brontosaurus, which has so many points of interest 
that a reduced figure is here presented. Several new charac- 
ters of this group are added, some of which will be of interest 
to comparative anatomists. 
RESTORATION OF BRONTOSAURUS, (Plate L) 
Nearly all the bones here represented belonged to a single 
individual, which when alive was nearly or quite fifty feet in 
length. The position here given was mainly determined by a 
careful adjustment of these remains. That the animal at times 
assumed a more erect position than here represented is probable, 
but ae eg on the posterior limbs alone was pong Bs ele 
head was remarkably small. The neck was 
considering i yeons | end and was the eho Spin 
of the versbral ool e body was quite short, and the 
abdominal cavity at seer size. The legs and feet were 
et and the bones all solid. The feet were plantigrade, 
*This Journal, a Nov. 1878 ; xvii, 86, Jan. 1879; xxi, 417, May, 1881; 
and xxiii, aL Jan. 1 
Am. Jour, sexe 2 die Serres, Vor. XXVI, No. 152,—Aveust, 1883. 
