s. HOLTH AND O. BERNER. M.-N. Kl. 



PART n. ANATOMICAL. 



BY 



O. BERNER. 



1 he examination of the material from Axel B.'s eyes was made, in all 

 essentials, in the way I have described in my former paper (Bibl. 6) in the 

 "Videnskapsselskapets Skrifter." I Mat.-Naturvid. Klasse, No. 4, Kristiania 

 1922, on those of his twin sister, Anna B. On this occasion, owing to specially 

 favourable circumstances. Dr. Holth was able to make the post-mortem exami- 

 nation as early as 6 hours after death, whereas in the previous case a 

 period of 61 hours elapsed before the material was fixed. I received the two 

 eyes in Bouin's fluid, a few drops of which Dr. Holth had injected into 

 the posterior part of the vitreous body immediately before the enucleation. 



Before proceeding with the working-up of the material, I measured the 

 diameter of the pupils, and found it to be 2.5 mm. in both eyes. In order 

 to give the reader an idea of the miosis in the present case I will mention 

 that in the numerous normal eyes that I have employed for purposes oi 

 control in these investigations, I have generally found that the pupil mea- 

 sured about 5 mm. in diameter, hi other words the pupil in the present case 

 was only half as large as that of ordinary cadaveric eyes. The exact agree- 

 ment between the size of the pupil found clinically by Dr. Holth after the 

 dropping in of homatropine, and m}' measurement of the size of the pupils 

 is worthy of notice. I received my control-material from one of the patho- 

 logical-anatomical institutes in the town; is was taken from normal persons 

 that had been of about the same age as Axel B. The only difference between 

 this material and that from Axel B.'s eyes is that the former had been 

 fixed by the laboratory assistant in ordinary formalin, while I fixed mine 

 in Bouin's fluid. 



Before depigmenting the material from Axel B.'s eyes, I endeavoured 

 this time too, to obtain a picture of the back of the iris, which I had found 

 so peculiarly smooth in the twin sister's eye (see PI. VI, fig. 14, of my 

 previous paper). This time, however, 1 was not successful in removing the 

 lens; it was firmly attached to the posterior surface of the iris, and I dared 

 not use force for fear of injuring the epithelium of the iris, hi order to see, 

 however, whether I could obtain a general view of the posterior surface 

 in this case also, I embedded one of the eyes in celloidin, and then, under 



