1871.] 283 (Cope. 
ral plane above the middle of the shaft. The general form is flat, partly 
due to pressure. The distal extremity is but little convex and displays 
the terminal muscular insertions but little produced. Near the inferior 
end there is one external expansion for articulation with the ulna. 
The radius is lost. The ulna, or a bone which is like that regarded as 
such in several species described by me, has the extremities in different 
planes which cross each other obliquely. The proximal is triangular and 
very wide, too wide for the humeri in their present state. It is also too 
long, leaving but little space for a radius, The distal extremity is as ex- 
panded, but much narrower, and presents too articular surfaces, a large 
and wide, and a narrow, connected by a wide isthmus. The bone was 
taken out near a humerus, but not in position. 
The pelvic arch, as above remarked, was found perfect, and with all the 
elements in place, with a femur with the head in relation to the acetab- 
ulum. The articular extremities are somewhat depressed and do not 
precisely fit. The déwm is a straight flattened bone, dilated moderately 
at the articular extremity. It is coarsely rugose striate at both extremi- 
ties. The dschium is a longer bone than the ilium, is more slender, and 
more expanded at the articular extremity, where it is also thickened. 
The shaft is curved so as to be sub-horizontal in position ; it shows no 
trace of union with its mate. The pudis is a broader bone, with the axis 
transverse to that of the body, and sigmoidally curved, first slightly for- 
ward then gently backwards. The common suture is about as wide as 
the proximal extremity. The posterior margin is somewhat thickened ; 
the anterior is produced into a process directed forwards, which is the 
homologue of that seen in the Testudinata. Itis connected with the 
distal end by a thin concave margin. 
The femur is rather more slender than the humerus; the distal ex- 
tremity is about as much dilated, the head less so. The great trochanter 
is a thick convex ridge with a truncate discoidal articular extremity, 
which is nearly separated from the head by a groove. Both extremities 
are moderately convex. The jidula is similar to that of other species in 
its broad, three-quarters discoidal form. Both articular surfaces are 
strongly convex and are continued on the inner side on the thinned inner 
border. The external margin is thickened and deeply concave, and with- 
out tuberosity. The tibia isa more slender element with sub-cylindric 
shaft and much expanded extremities, The proximal is oval and is con- 
tinued as a narrow ridge on the inner side, for contact with the corre- 
sponding ridge of the fibula. The distal extremity is an equilateral 
spherical triangle, of which the inner angle is on a different plane from 
the remainder, 
The phalanges are slender with cylindric shafts and expanded extremi- 
ties, which support oval articular surfaces. Those of the two extremities 
appear to be similar. The distal ones are extremely small and flat, with. 
expanded extremities, 
Of doubiful bones may be mentioned two with flat expanded distal ex- 
tremity and thick proximal, bearing an oval articular surface, with an 
