Chapter XVII 



— 193 — 



Golgi Apparatus 



a system of intracellular canaliculi opening freely to the exterior 

 and serving for the entrance of nutritive juices as well as for the 

 excretion of metabolic products from the cell. Nevertheless, after 

 further research, this worker was led to deny all communication 

 of these canaliculi with any part of the pericellular space and 

 considered them to be formations completely separated from the 

 lymphatic circulation and probably comparable to the network of 

 Golgi. It is certain, however, that, of the formations described by 

 Holmgren, some correspond to canaliculi communicating with the 

 exterior as this investigator at first thought. But in these pages 

 we reserve this term exclusively for the formations described by 

 Cajal under the name which has been currently used since then 



Fig. 130. — Pea root. Vacuolar system. 

 Method of da Fano. 1-4, network strongly 

 impregnated with silver. 5, fusion to uni- 

 formly stained vacuoles, which later (6) 

 appear like dictyosomes, then (7) become 

 larger with silver-impregnated precipitates. 



by numerous cytologists, viz. Golgi-Holmgren apparatus. These 

 canaliculi do not seem to us to be comparable to the structures 

 now called dictyosomes. 



Possible relationships of the vacuolar system with the apparatus 

 of Golgi and of Holmgren:- The facts concerning the vacuolar 

 system in plant cells have given the question a new orientation. 



Well before the origin of vacuoles and their property of accu- 

 mulating vital dyes were known, Bensley (1910) had succeeded 

 in bringing out the canaliculi of Holmgren in the cells of the meri- 

 stem of the root of Allium Cepa and had proved that they are 

 transformed into vacuoles in the course of cellular differentiation. 



Having been struck by the resemblance of the young filamentous 

 and reticular vacuoles in embryonic cells to the formations known 

 as the Golgi apparatus in animal cells, we had formulated, in our 



