18 
Donald Baird and John R. Horner 
A partial right scapula (ANSP 15322) from Phoebus Landing was 
described by Miller (1967 : 233, PI. 4, Fig. 6). The fragment preserved ap- 
pears to come from near the middle of the blade, above the acromial 
ridge. Its edges are parallel and do not appear to be diverging dorsally. 
According to Brett-Surman (1976) non-expanding scapular blades of this 
sort are generally attributable to the Hadrosaurinae. 
Two hadrosaurian limb bones, a right second metatarsal lacking its 
distal end and a fragment of a small left tibia (“fibula” of Cope 1875, PI. 
7, Figs. 1-la), are here removed from the syntypic series of Hypsibema 
crassicauda (USNM 7189). The tibia fragment (Figs. 4C-C 1 ) consists of a 
badly eroded and water worn mid-shaft that is uncharacteristic below the 
family level. Reconstructed, this tibia would have been about 600 mm 
long, or about two-thirds the length of the tibia in the type skeleton of 
Hadrosaurus foulkii Leidy (ANSP 10005). The metatarsal (Figs. 4D-D 1 ) is 
close in size and morphology to the corresponding element in Hadrosaurus 
foulkii. A right third metatarsal (USNM 5963, Fig. 8B) from Phoebus 
Landing was listed by Gilmore in Stephenson (1912: 120) as Trachodon 
tripos ? (Cope). This bone is 340 mm long and has proportions similar to 
those of Kritosaurus. But since generic differences have not been recognized 
in the metatarsals of hadrosaurian dinosaurs, no generic identification is 
possible at this time. 
Fig. 8. Hydrosaurinae indet. A, distal half of right humerus from Milepost 49, 
UNC 5735, in anterior and posterior views; B, right metarsal III from Phoebus 
Landing, USNM 5963, in anterior and posterior views. Scale in cm. 
