I Hi: TNTEOUMENI n;v l/'/'/'v/- \QS8 



811 



distinct in the midst of the other cells, as in those of the wall formed by the 

 coronary cushion. 



The horn thrown out on the surface of the podophyllre, immcdiati ly 

 after tin nmoval of a fragment of the wall, is not a definitive horn, but 

 must be replaced by that from the coronet. This substitution is complete; 

 as a microscopal examiimtion proves that the wall which descends from the 



Fig. :;;; 



Ho|:i/oM 'IF THE JUNCTION OK TIM; WALL WITH THE SOLE OK THE HOOK. 



i. Wall, with its horn-tubes; 6, 6, Horuy laminae projecting from the wall; c, c, 

 Horn-tubes formed by the terminal villi of the vascular laminae, the horn 

 surrounding them and occupying the spaces between the horny lamina;, con- 

 stituting the " white line;" <./, Horny sole, with its tubes. 



cushion, and is furnished with horny laminte, passes beneath the provisiouul 

 wall, and glides downward by the combined action already mentioned over 

 the surface of the soft cells of the vascular laminse. As soon as the latter 

 are covered by the proper wall, their marginal papillae become atrophied, 

 and they again assume the limited function pertaining to their physiological 

 condition. 



HORIZONTAL SECTION OK Till. \\\I.I.. AM- Hul:N\. AM- WxTI.M: I VM1S1. TO 

 8IIOW 1111 .IIVIMN i 1111 I Mill: AM- 1111. I.AMIM.I.I 1. 



n, Inner jwrtion of the wall with the lamina- arising from it; b, Vascular lamiutr; 

 . Horny lamina of average length; c', c', Unusually .-hurt lamina-: . 

 LiiiiinelliP on the sides of the horny l.nninir; d, Vaccular lamina passing 1 

 tuo horny ditto; J', Vascular lamina passing between three horny lamin 

 :al laminellae ; e, <, Arteries of vascular lamina- which have been injected. 



(The description of the disposition of the epithelial cells givvn by 

 Chauveuu does not coincide with my own observations. As ho correctly 



