326 



Transactions of the Society. 



tissues, embryonic and adult. The changes undergone by the 

 Golgi apparatus in glandular secretion, bone formation, etc., have 

 been described. Eecently its behaviour following experimental 

 lesions to the nervous system and in various pathological conditions 

 (cancer, etc.) have been studied by the Spanish observers. Further 

 details for the Histologist and Neuropathologist are available in 

 Cajal's masterly monograph {1). 



Latterly Zoologists have applied the method both to Vertebrates 

 and Invertebrates with success. The behaviour of the Golgi 

 apparatus in Oogenesis and Spermatogenesis is being studied at 

 the present time with interesting results. 



In fact, the Golgi apparatus being an integral part of probably 

 all animal cells, microscopic observations, whether zoological or 

 histological, cannot be complete without reference to this cell- 

 constituent. 



Comparison of the pictures of the Golgi apparatus obtained by 



GA 



; Explanation of Text-Figures 1-3, 



All the figures represent Paludina vivipara spermatocytes. 



Text-fig. 1.— Chrome-osmium fixation; stained with iron-hsematoxylin. Eodlets 



(dictyosomes) discrete. 

 Text-fig. 2.— Kopsch technique. Golgi apparatus a reticulum. 

 Text-fig. 3.— Golgi method. Also a reticulum. The Cajal method gives a similar 



appearance to the Golgi apparatus. 

 Text-figs. 1 and 2 after Gatenby (5). No. 3 after Perroncito (9). 

 Lettering as follow : — 



DY = dictysome. GA = Golgi apparatus. N = nucleus. 



