ANATOMY OF BAL2EN OPTEEA ROSTRATA. 
255 
a base, and an apex ; the latter was covered with an epiphysary lamina, and articulated 
with a corresponding facet on the upper surface of the incus. The base was ovoid, and 
exactly fitted into the fenestra ovalis ; the two rami were short and thick, cylindrical, 
and not channelled, and the intervening foramen small and ovoid. 
Eye. 
The eye was situated about 28^ inches from the point of the upper jaws, 2| inches 
above, and directly in a line perpendicular to the commissure of the lips, and about 
7 \ inches in front of the external auditory meatus. 
The eyelids measured 2-J inches along their free margin, and the depth of each of 
them, taken at its centre, was about thirteen lines from above downwards. The pal- 
pebi’83 were surrounded and defined by two crescentic furrows in the integuments, one 
of which was placed an inch above the margin of the upper, the other If- inch below 
the margin of the lower lid ; neither Meibomian follicles, cilise, nor tarsal cartilages 
could be detected at the border of the lids. 
The thickness of the palpebrse varied from three lines and a half at the base or orbital 
attachment to one line at the free margin, the cuticle being three-fourths of a line in 
depth. The basement layer exhibited a large number of elliptically disposed tendinous 
fibres intermingled with light-coloured granular fat; on removing this structure a 
strong orbicularis palpebrarum was exposed, which was half an inch thick at the ante- 
rior canthus, but gradually became thin towards its posterior angle, where it measured 
only one line in thickness. This muscle arose from the inner angle of the orbit; its 
fibres ran in a semicircular direction, coursing round the upper lid and became slightly 
attached externally to a strong tendinous band, that ran from the external canthus to 
the outer wall of the bony orbit ; passing this the fibres of the muscles curved downwards, 
and were attached to the conjunctiva in the centre of the lower lid, where they were 
gradually lost. 
On removing the orbicularis palpebrarum, a large quantity of dark-brown fat was 
disclosed, in which, at the lower and outer part of the orbit, the lacrymal gland lay im- 
bedded ; this latter appeared as a small bilobed granular body, of a yellowish-brown 
colour, and irregular in outline ; it measured 2 inches in its long diameter, which ex- 
tended from before backwards, and 1 inch transversely ; its external or superficial lobe 
was somewhat square in shape, and was covered by the orbicularis palpebrarum ; the 
internal or deeper-seated lobe was round, and lay within the orbit. Its ducts, about 
eleven in number, opened on the palpebral conjunctiva by oblique pores. A detached 
and lighter-coloured glandular body (Hardee’s gland X) lay above and external to the 
gland proper, and its ducts opened by numerous fine pores into the superior palpebral 
sinus. The lacrymal nerve lay inferior to the gland, and was traceable through it to the 
conjunctival surface of the eyeball. 
Three folds of conjunctiva passed, almost horizontally, from the globe of the eye to the 
anterior canthus, or commissure of the lids; above and below the central fold two small 
