102 ZOOLOGY 



assumption that the vacuonie, stainable in neutral red, is the true 

 Golgi, and that this stain is specific. Karpova (68) states that 

 dictyosomes, mitochondria and other granules are stained in 

 neutral red ; furthermore, Janus green will stain both the 

 dictyosomes and mitochondria. She does not agree with the 

 homologies suggested by Parat, but states that the vacuoles are 

 the canals of Holmgren and not the Golgi proper. (This view 

 does not seem to us to differ much from that of Parat in essentials.) 

 She concludes that the dictyosomes are really very similar to the 

 mitochondria, and that the similar chemical composition leads one 

 to the conclusion that they are of the same origin (cf. plastidome 

 from chondriome in plants). It is, of course, admitted by nearly 

 all workers that the Golgi apparatus and mitochondria are similar 

 in chemical composition when that composition is expressed in 

 crude terms such as can be derived from coarse tests with dyes. No 

 microchemical tests have as yet been elaborated to separate the 

 different proteins to any satisfactory degree. 



Finally, Gatenby (35), in 1929, has shown that his original 

 interpretations are correct. He has demonstrated the neutral red 

 vacuoles within the Golgi, and followed the whole cycle through 

 with intravital staining. The whole behaviour of the " Neben- 

 kern " of Helix is so exactly similar to the Golgi complex of other 

 sperms that there does not appear to be any reasonable doubt 

 about their homology now (Fig. 55, E, F). 



Bowen makes the point (12) that the very diverse form of the 

 Golgi apparatus from the isolated bodies of the invertebrates to 

 the plate or network of the vertebrates is not consistent with 

 chance deposition. Further, in plant promeristem cells spherical 

 vacuoles occur packed together closely ; these blacken with osmic, 

 but no intervening network is formed. 



It has been pointed out previously that the vacuome theory is 

 based in origin at any rate upon the supposed homology of the 

 plant vacuome and the animal Golgi apparatus. That this homo- 

 logy is untrue has been shown by Bowen (12) and by Patten, 

 Scott and Gatenby (110), who have demonstrated the presence of 

 osmiophilic platelets in plant cells (Fig. 54). 



Bowen, in 1927 (12), describes these platelets, and while not 



