380 THE CORNEA, BY ALEXANDER ROLLETT. 



considered to be derived from the blood, but the cloudiness around 

 the point of irritation must be set down to the proliferation of the 

 corneal corpuscles.* 



On the other hand it was maintained, as showing the non-partici 

 pation of the corneal corpuscles in the formation of pus, that no 

 cloudiness appears in the cornea of the Frog, after the application of a 

 caustic, if the blood of the animals had previously been completely 

 displaced (as Cohnheim believed) by a O75 per cent, solution of com- 

 mon salt injected in the course of one or two hours. This is quite 

 in favour of the non-participation of the corneal corpuscles in the 

 formation of pus.f 



Soon, however, the results of new investigations were published, 

 which had been undertaken by Norris and Strieker, J in which the 

 proliferation of the corneal corpuscles in inflammation, and their 

 transition into migrating cells, were maintained in the most decisive 

 manner, and illustrated by several drawings. 



Thus two different origins are attributed by different authors 

 to the migrating cells of the cornea ; from the blood alone ; 

 from the corneal corpuscles alone, or from both coincidently. 



We shall recur to this subject after we have described the 

 peculiarities and origin 'of the second form of cell found in the 

 cornea. 



THE CELL-PLEXUS OF THE CORNEA CORNEAL CORPUS- 

 CLES CORNEAL CORPUSCLES OF TOYNBEE AND VIRCHOW 

 STELLATE (RADIATED MULTIPOLAR) CORNEAL CORPUSCLES- 

 MOTIONLESS CORNEAL CORPUSCLES (v. Recklinghausen) 

 FIXED CORPUSCLES OF THE CORNEA (Cohnheim). These 

 structures are cells destitute of a membrane or cell- wall, but 

 provided with nuclei. Each cell has a flattened body and a 

 similarly shaped nucleus. The short diameter of the flattened 

 cell is perpendicular to the surface of the cornea, or deviates 

 but. little from this direction. The surfaces of the little plates 



* F. A. Hoffmann, loc. cit., pp. 209217. 



f Cohnheim, Ueber das Verhalten der fixen Bindegewebs-Korperchen 

 bei der Entzundung, (On the behaviour of the fixed connective-tissue 

 corpuscles in inflammation,) Virchow's ArcJiiv, Band xlv., p. 333. 



J Studien ausdem Instltut fur experimentelle Pathologie in Wien. Heraus- 

 gegeben von Strieker, pp. 1, 18, and 31, 1870. 



Loc. cit., p. 180. 



