82 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [DoC. 19, 



The under surface of this fragment presented two holes in the 

 position which the radius and ulna might well occupy; and on 

 working away the matrix, I found that they led hack into cavities 

 which are the casts of these two hones. The narrower, answering 

 to the ulna, is 0-6 in. long by 0-05 in. wide. The radial cavity is 

 much broader, but its exact dimensions cannot be obtained. 



The forearm is disposed nearly at right angles to the arm. At 

 its distal end four minute rounded carpal ossicles, disposed in two 

 rows, are discernible. Then come four metacarpal bones, the longest 

 of which is the second from the radial side, and measures 0*3 in. 

 This is succeeded by a short hourglass-shaped phalanx, 0-15 in. 

 long. The metacarpal on the radial side of the preceding is 0-25 in. 

 long. Those on the ulnar side seem to have been shorter and more 

 slender. Prom some obscure indications of other phalanges I con- 

 clude that the fore foot could not have been less than an inch long. 



The cast of the left half of the pelvic girdle is well displayed (fig. E). 

 The ilium was 0-5 in. long, 0*28 in. wide at its truncated end, 

 slightly convex forwards, and concave backwards, and its long 

 axis was apparently almost perpendicular to that of the vertebral 

 column. The ischium and pubis were strong bones, meeting with 

 their fellows at the symphysis ; and the anterior margin of the pubis 

 is produced downwards and forwards into a strong process. The 

 shape of the obturator foramen is not distinctly shown. The casts 

 of both of the femora are visible, and a part of the bony substance 

 of the right femur is preserved. The bone is 1-1 in. long, and 

 has a sigmoid curvature, the greater part of its anterior contour 

 being concave, that of its posterior contour convex. There appears 

 to have have been a prominent internal trochanter. The tibia and 

 fibula are each 0*75 in. long ; the former had a broad and expanded 

 proximal end, and a comparatively narrow shaft, which widens 

 again distally. 



The cast of the left foot (fig. C) is very perfect, but not quite easy of 

 interpretation. The fibula of the left leg is undisturbed ; but the 

 tibia lies obliquely across the fibula, with its femoral end on the 

 outer, and its tarsal end on the inner side of the corresponding ends 

 of the fibula. I conceive that while its tarsal end has remained in 

 its proper position, the femoral end of the tibia has been dislocated ; 

 and, in this case, the cast will exhibit a dorsal view of the foot, the 

 outer side of which will be fibular, while its inner side will be tibial. 

 A single bone, 0-3 in. wide, and deeper on its fibular than on its 

 tibial side, articulates with the tibia and fibula, and represents the 

 calcaneum and astragalus. Between this bone and the three middle 

 metatarsals three small tarsal bones, forming a distal row, appear 

 to have been interposed. The five metatarsal bones are perfectly 

 represented by their casts. Each is subcylindrical, and wider at 

 its articular ends than in the middle. The two outer are respec- 

 tively 0-3 in. long, while the middle metatarsal is a very little 

 longer. The two inner are each about 0*25 in. long, and the 

 innermost is a somewhat stouter and thicker bone than the 

 other. Of the ^digits the middle and the next outermost are 



