380 C. DA FANO 



14. Marcora, F. — " Sur les alterations de I'appareil reticulaire interne des 



cellules nerveuses motrices, consecutives a des lesions des nerfs ", 

 ' Arch. Ital. Biol.', vol. liii, 1910. 



15. Pentield, W. G. — " Alterations of the Golgi apparatus in nerve cells ", 



'Brain", vol. xliii, 1920. 



16. — — • " The Golgi apparatus and its relationship to Holmgren's tropho- 



spongium in nerve cells. Comparison during retispersion ", ' Anat. 

 Rec.', vol. xxii, 1921. 



17. Verson, S. — "Contributo alio .studio delle cellule giganti tubercolari 



e di altri elementi cellulari normali e patologici", 'Arch. Sc. Med.', 

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DESCRIPTION OF PLATES 19 and 20. 



All figures have been drawn by means of the camera lucida 

 at the magnification indicated for each of them, and are from 

 spontaneously absorbing tumours treated by the cobalt nitrate 

 method for the demonstration of Golgi's internal apparatus. 

 They are fully described in the text. 



Reference Letters. 



d.tu., degenerating tumour cell ; /., fibroblast ; g.c, giant cell ; 

 ps.g.c, pseudo-giant cell ; k., area of keratinization ; m., macrophage ; 

 flc, polymorphonuclear leucocyte ; in., tumour cell ; iv.c, wandering cell. 



Fig. 1.- — Jensen's carcinoma (387 a). Moderately progressed absorption. 

 (X1160.) 



Yi<f. 2. — Jensens carcinoma (399b). Advanced absorption; surviving 

 tumour elements amongst proliferated connective-tissue cells. (xl620.) 



Fig. 3. — Twort's carcinoma (123 a) at the end of the absorption process. 

 One surviving tumour cell ; group of macrophages. ( x 1620.) 



Fig. 4. — Adeno-carcinoma 27 (122 c) in initial phase of absorption. 

 ( X 1000.) 



Fig. 5. — Adeno-carcinoma 27 (136 c). Group of surviving cells when 

 the tumour was nearing complete absorption. ( x 1620.) 



Fig. 6. — Alveolar carcinoma 91 (153 b). Internal apparatus in different 

 stages of fragmentation during spontaneous absorption. ( x 1620.) 



Fig. 7. — Alveolar carcinoma 206 (331 a). Breaking up of reticular 

 apparatus during absorption. ( x 1620.) 



Fit'. 8. — From connective-tissue capsule enveloping keratinized remains 

 of squamous cell carcinoma 630 (126 a). Connective-tissue cells and foreign 

 body giant cells with fragmented apparatus. ( x800.) 



Fi". 9. — From the peripheral layers of an absorbing nodule of sarcoma 

 37 8° 140 A). (xl240.) 



