Prof. Owen on Dicynodon tigriceps. 247 



preserved, but the whole border of the lower and back part of the expanded end of 

 the bone is broken away. The breadth of the distal end of this bone, as mutilated, 

 is 7 inches; its circumference nearly 18 inches; the circumference of the shaft 

 being 7^ inches. 



pi. Pleurapophysis or rib-element. 



DESCRIPTION OF THE PLATES. 



Plate XXXIIl. 



VertebrfE and Sacrum of the Dicynodon tigriceps. 



n. Neurapophysis. 



Fig. 1. Side view of a middle or anterior dorsal vertebra. p. Parapophysis. 



Fig. 2. Front view of the same. ■< d. Diapophysis. 



Fig. 3. Section of the centrum, showing its bi-concavity. z. Zygapophysis. 



\^ns. Neural spine. 

 Figs. 1-3 are of the natural size. 



Fig. 4. Upper view of the first two sacral vertebrae. 

 Fig. 5. Under view of the same. 

 Fig. 6. Under view of two posterior sacral vertebrae. 

 Fig. 7> Back view of the same. 



Figs. 4-7 are \\h of the natural size*. 



(Figs. 4-7 are from East Brak River, Fort Beaufort.) 



Plate XXXIV. 

 Pelvic and Scapular arches and Limb-bone of the Dicynodon tigriceps, |th natural size. 



Fig. 1. Left ' OS innominatum ' : a,b, c, ilium ; s, s, t, ischio-pubic bone ; o, obturator foramen ; 



t, tuber ischii ; t, c, ischiadic notch. 

 Fig. 2. s,g. Scapula, or coracoid ? (From near Tola's Kraal, Kafraria) ; c,p. Coracoid? (Road 



to Block Drift). 

 Fig. 3. Scapula, or coracoid ? (Near Tola's Kraal, Kafraria.) 

 Fig. 4. Distal end of humerus or femur. (East Brak River, Fort Beaufort.) 



* Since this part of the ' Report ' was in type, an almost entire pelvis of the Dicynodon has been 

 exposed in a block of matrix : it will be described hereafter. 



VOL. VII. SECOND SERIES. 2 L 



