ON ANIMALS BETWEEN BIRDS AND REPTILES. 
247 
EXPLANATION OF THE PLATES. 
Plate XXVH. 
Figs. 1, 3, 5. Tlie manus, or fore-paw j tlie pelvis ; and tlie pes, or tind- 
foot of a crocodile. 
j, 2, 4, 6. The corresponding parts of a swan. 
,, I. II. III. IV. V. The digits, commencing with the thumb or great 
toe : — cp. the carpus ; me. the metacarpus j p7i. phalanges ; 
II. the ilium ; Is. the ischium ; P6. the pubis j Am. the aceta- 
bulum ; Ts. the tarsus ; Mt. the metatarsus. 
Fig, 7. Front view of the foot of Iguanodon. The metatarsal bones are not 
quite naturally articulated together. Reduced from the figure 
given by Professor Owen in the Palseontographical Society’s 
publications. 
Plate XXVIII. 
Fig. 1. The left os mnominatum of a young ostrich. 
,, 2. Compsognothiis longipes, reduced from the figure given by the late 
Professor A. Wagner in the Ahhandlunge7i der h. Baieiischen 
Ahademie. Scp>. scapula ; H. humerus ; R. U. radius and ulna. 
„ 3. Those parts of the skeleton of Iguanodon which are certainly 
known : — Mn.j the mandible, is very possibly too large j all the 
other bones are drawn in their true proportions, as shown by the 
Maidstone specimen. 
