THE PERIPHERY OF THE CORNEA. 435 



lie immediately beneath the superficial tesselated cells. Speci- 

 mens prepared with chloride of gold corroborate all that lias 

 just been placed before the reader in the most satisfactory 

 manner. I have not observed the passage of the terminal 

 fibres through the superficial layers of the epithelium. The 

 connection stated by Kuhne to exist between the above- 

 described corneal nerves and the corneal corpuscles does not, 

 according to Engelmann, occur. 



I have sought in vain in a great number of extremely 

 successful specimens of the cornea of the Frog, prepared witli 

 chloride of gold, for the fine straight striae stated by Lip- 

 mann* to occur between the finest nerve fibres of the cornea 

 and the nucleoli of the corneal corpuscles in such gold 

 preparations, as well as for the straight strise which are 

 seen proceeding from the nucleoli of the endothelial cells of 

 the membrane of Descemet. I must rather maintain, from 

 the examination of these gold specimens, that the finest nerve 

 fibres are always to be seen in the corneal tissue running past 

 the corneal corpuscles and their processes, and that therefore 

 no connection of the corneal corpuscles with nerves can be 

 demonstrated. 



THE MARGIN OF THE CORNEA. 

 (HornhautfaljB, Limbus Cornece.) 



This is a part to which special interest attaches on account 

 of the transitions and connections that here occur between 

 the above-described layers of the cornea and other tissues. 



The external epithelium (a a,' fig. 393) is thus continued with- 

 out interruption into the epithelium of the conjunctiva (a </ 

 fig. 393). We frequently find the external epithelium, to- 

 gether with the anterior limiting layer of the corneal epithelium 

 (lamina elastica anterior), very incorrectly designated the con- 

 junctiva cornese (as by Kolliker).f The anterior limiting layer 

 in reality does not agree in structure with the peculiar stroma of 

 the conjunctiva bulbi, nor are there any transitional or connect- 



* Virchow's Archiv, Band xxxviii., p. 218, Taf. vii., figs. 1 6. 

 t Handbuch, p. 647. Leipzig, 18G7. 



F F 2 



