placed in a dark room, particularly if an albino animal is used, the 

 inverted image of the candle, although having to traverse the choroid, 

 the sclerotic and the muscular parts, is perceived bright, and tole- 

 rably well defined. "When this bright spot is examined with a lens 

 or a compound microscope, it is found to be sufficiently illuminated 

 to allow of the examination of the motion of the globules of the 

 blood. On the young guinea-pig the same may be still more easily 

 examined, but it is particularly the albino rat or surmulot (Mus 

 decumanus) that the author has found most suitable for these obser- 

 vations, exophthalmosis -being most easily produced on this animal, 

 while the eye is so transparent and the iris so close to the cornea, 

 that the circulation of the blood-globules in the vessels of the iris may 

 be observed. At the same time, beneath the iris and sclerotic may 

 be seen the ciliary processes from their origin at the ora serrata to 

 their anterior extremity, where they are seen to form a circular crown 

 with a serrated edge surrounding the crystalline lens. The vessels 

 of the ciliary ligament of the choroid are likewise rendered accessible 

 to actual inspection during life. 



For the purpose of examination, the animal is secured by a few 

 turns of a band, about 1| inch in width, passed round its body so as 

 to confine the limbs. It is then placed on a narrow slip of cork, to 

 which it is fixed by some turns of string. When steadily fixed, ex- 

 ophthalmosis is produced and maintained by passing a strong thread 

 around the slip of cork and the head of the animal close to the eye, 

 alternately in front and behind it. When the compound microscope 

 is used, it will be found requisite to place the animal sidewise, so as 

 to direct the object-glass over the bright image above mentioned, 

 which is always formed when the eye is placed before any bright 

 light. 



The author first describes the vessels of the conjunctiva over the 

 sclerotic and cornea. These vessels form a network behind and 

 before the ciliary ligament, and join into numerous small trunks 

 which unite with a circular ciliary vein running all round the ciliary 

 ligament. In the corneal conjunctiva the vessels may be traced 

 towards the summit of the cornea over the outer half of its surface, 

 and even beyond. They are seen to commence internally, as if with 

 free extremities, from whence the blood is seen circulating rapidly 

 towards the circumference of the cornea. Then large meshes soon 



