12 



QUA DRUM AN A. 



tunica conjunctiva is black round the cornea for a quarter of an inch, 

 and then becomes transparent so as to show the white tunica albuginea. 

 The tunica albuginea is very thin and transparent, so as to show the 

 black choroid through it ; but at its anterior part it becomes thick and 

 opaque, and thickest at edge of the cornea where it is covered by the 

 black conjunctiva. The cornea is pretty thick, and is not quite round ; 

 is elliptical with one angle towards the nose, the other outwards. The 

 choroid coat has the nigrum pigmentum on both sides, and is very black, 

 and round the edge of the crystalline lens the internal edge [of the 

 choroid] adheres to the edge of the crystalline and enters part of the 

 vitreous humour for near three-eighths of an inch : this adhesion is 

 very strong. 



The ligamentum ciliare is very strong and white as in the human, so 

 much so as to allow the choroid being torn all round it ; and the iris the 

 same ; so that the ciliary processes are left like a ring round the cornea. 

 The iris is of a strong orange colour anteriorly, but is very black 

 posteriorly, which shows that the colour of the his is not from the 

 nigrum pigmentum: it dilates on pressing the cornea, but contracts again. 

 The optic nerve is smaller than in the human, is a little serpentine, 

 and enters much about its common thickness on the inner side of the 

 axis of the pupil; where it passes through the sclerotic and choroid coats, 

 it is nearly as large as at any other part : when you look upon its 

 termination on the inside of the eye, it appeals to be of a brownish 

 colour 1 with a little spot in the middle. When entered the eye, it 

 divides into two lamellae, the exterior of which is veiy tender and 

 thin, so that there is no preserving it, and it adheres more firmly to 

 the choroid than to the other lamella ; the other [lamella is] thicker 

 and is a good deal denser, but becomes thinner and thinner forwards ; 

 it has the blood-vessels in it, and adheres pretty firmly to the vitreous 

 humour ; so much so, that, if you take hold of it, you will raise the 

 vitreous also. I could trace it on to the edge of the circular nigrum 

 that covers the anterior part of the vitreous humour, but there they 

 seem to be blended. The crystalline lens is very flat. 



The muscles of the eye are as in the human. The brain is very like 

 the human brain 2 . The thyroid glands are two, and are very thin; one 

 lying on each side of the trachea, but not joined over the trachea as in 

 the human, and are very long, reaching from the cricoid cartilage to 

 the thorax. The sacculi laryngis are very thin and deep, and at the 



1 [Has Hunter here mistaken the 'foramen of Soemmerring ' for the contiguous 

 termination of the optic nerve ?] 



- [The skull, with the calvarium removed, is No. 5003, Ostcol. Series. It shows 

 the specimen dissected ;;ot to have been full-grown.] 



