VIII. 



Figure 48, 

 (p. 1261. 



Figure 50. 

 (p. 128) 



Figure 51, 

 (p. 129) 



Figure 52. 

 (p. 150) 



Figure 53. 

 fp. 150) 



Figure 54. 

 (p. 134) 



Figure 55. 

 (p. 136) 



Figure 56. 

 (p. 137) 



Figure 57. 

 (p. 139) 



Figure 58. 

 (p. 144) 



Figurel50. 

 (p. 148) 



Figure 60. 

 (p. 158) 



Figure 61. 

 fp. 156) 



yaucheria .IIotomraata gall on Vauclieria. 

 (After Rothort) . 



Cireaea lutetiana . a, Cross-section through 

 an eel root gall » later stage, numer- 

 ous giant cells are visilDle, the nuclei 

 of which are "beginning to degenerate 

 and hreafe do?/n. "b, irregular Ijr lobated 

 nuclei from a giant cell (Amitosis "by 

 ""budding"). In these are numerous 

 nucleoli of different sizes, c, single 

 giant cell with numerous nuclei, 

 (After Tischler) . 



IPart of a cross-p-section throuj^ c. root ?;en 

 gall with naltinuclear giant cells, 

 (After Eoumey) . 



Basidioholus ranartmi . Multinuclear giant 

 cells, (A.fter Raciborslti) . 



Dividing nucleus from a giant cell. (After 

 Prillieux) , 



Ulnus campestri s. The leaf at the left has 

 formed aiT'ext ens ive sac gall, after 

 infection with Schizoneura lanitginosa . 



Quercus , Two cynipides galls. At the left, 

 "Ssmipa polyoera ; at the right Cynips 

 aries , 



Hormidium nit ens , Abnormal cell division 

 after treatment with congo red. 

 (After Klebs) . 



Beta . Crossw-seotion through a yellow sugar 

 beet, which bears several ridge-lilte 

 tissue excrescences, extending longi- 

 tudinally. (After de Vries) , 



Fagus i Beach leaf with tvro galls of Hormonyia 

 fagi. At a, some anastomoses have "been 

 formed betvveen pairs of lateral rihs. 

 Compare also the text. (Origir^al) 



Phaseolus multiflorus . Callus homooplasia 

 from stalki Above the normal hard 

 bast hundles, may he seen the abnormal 

 phloem and aylem parts, produced 

 after injury. At the right, a medul" 

 lary ray. (After Schilherszlsy) . 



Populus pyramidalis . a and h, greatly devel- 



oped callus 'tissue (2/1) . the latter 



with numerous sprouts, (Original) . 



Lanium orvala . Stalk with strong callus roll. 

 (Original) , 



