28 SPECIMENS OF CETACEA. 



it has pierced the sclerotic, also the openings for tlie 

 ciliary arteries. Knox Collection, No. 79. 



[The preparations of the eyeball No. 42 to No. 53 were 

 part of the Goodsir Collection.] 



42. Eyeball, anterior segment, showing section through 



sclerotic, choroid, retina, iris, and ciliary processes, 

 also a linear pupil. On the front of the globe are 

 the cornea and the conjunctiva. 



43. Eyeball, anterior segment from a Mysticete. The 



cornea covered by the conjunctiva in front ; a coronal 

 section has been made through the coats to show 

 the vitreous body occupying the space in front of 

 the retina. 



44. Eyeball, posterior segment of the choroid of Mysticete, 



showing the vasa vorticosa ; the retina is partially 

 separated from the anterior surface of the choroid. 



45. Eyeball, posterior segment of the globe of Mysticete, 



showing sclerotic, choroid, retina partially detached, 

 and the remains of the vitreous body. 



46. Eyeball of the Mysticete in transverse section, showing 



the fibrous sclerotic, and the tubes for the trans- 

 mission of the optic nerve and the long and short 

 ciliary arteries. 



47. Eyeball. Antero-posterior section through the coats, 



showing the retina detached from the choroid and 

 connected with the optic nerve. The cornea and iris 

 form the anterior part of the section. 



48. Eyeball. Antero-posterior section through the globe of 



a Mysticete, showing the coats, the lens, the vitreous 

 body, and the optic nerve. 



49. Eyeball, the greater part of the, of B. mysticetus. Cornea 



removed, showing front of iris and pupil ; sclerotic 

 cleaned of its muscles. 



50. Eyeball. Coronal section with the cornea removed, show- 



ing the iris, the ciliary processes, and the anterior 

 part of the retina. 



51. Eyeball. Antero-posterior section, showing optic nerve, 



the large rete mirabile which encloses it, the choroid 

 with its pigment, tapetum, and iris. 



52. Eyeball. Antero-posterior section of optic nerve, rete 



mirabile, and sclerotic ; the iris, lens, and choroid 

 have been retained, and the outer surface of the 

 choroid shows the vasa vorticosa. 



