THE RIGHT WHALE OF THE NORTH ATLANTIC. 919 
crus penis in the male, whilst the shaft of this process gave origin to the compressor 
urethre muscle. The superior process (b or beak in SrrutHERs’s figures) seemed to be 
shorter and more slender than in discayensis; doubtless in both species it was con- 
nected to the spine by a ligament. He also figures the femur and the cartilaginous 
tibia. As the femur and tibia in this skeleton of bescayensis had not been preserved, a 
comparison of the rudimentary hind limb with that in mysticetus could not be made, 
though from GuLpBERG’s figures it had corresponding characters in both species of 
Right Whale. 
Os PENIs. 
The Os Penis had been obtained. It was 12? inches long, and somewhat cylindri- 
form in shape. The deep end was swollen, 8 inches in girth, and from it the bone 
Fic. 24.—Os penis. 
tapered to the opposite end, which was 54 inches in girth (fig. 24). The presence of a 
bone in the penis of a Right Whale had not previously attracted attention. It was not 
quite as long as the corresponding bone in the walrus, and its texture was not so dense. 
ORBIT. 
The separate skull in the Anatomical Museum, as may be seen from the measure- 
ments in Table I., is of larger dimensions than the skull on the skeleton. As its Orbit 
was entire, I have been able, therefore, to complete the description of this region. The 
upper border was formed by the outer or orbital bar of the frontal bone, thick and 
rounded, which ended in front in the pre-orbital process, and behind in the somewhat 
larger post-orbital. The antero-posterior diameter of the orbit was 8 inches, and its 
vertical diameter was 83 inches. Its lower border was formed by the curved malar 
bone, which articulated behind with the anterior blunt process of the squamous-temporal, 
and in front with the outer end of the pointed process of the superior maxilla. The 
temporal end of the malar was truncated and 4 inches in diameter; a disc of fibrous 
tissue was interposed between it and the corresponding articular surface of the temporal. 
The maxillary end, 44 inches in its greatest diameter, was irregular in shape and formed 
an elongated process which passed upwards behind the pointed process of the superior 
maxilla; a disc of fibrous tissue about half an inch thick was interposed between it and 
the articular surface of the maxilla. The malar bone, measured along the convexity, 
was 16 inches between its articular ends; it was generally concave in its long axis, 
