96 ZOOLOGY 



often found in connection with the Golgi apparatus — which is 

 called the idioplasm (Fig. 52, E, F). [Many English cytologists use 

 the term archoplasm for this structure. This is, we think, un- 

 desirable, inasmuch as the archoplasm is a term used sensu stricto 

 in connection with the central apparatus, and is always associated 

 with the centrioles. It is through the fact that the Golgi elements, 

 with their accompanying idioplasm, are, in many much-studied 

 cases, concentrated round the passive centrioles, that this confusion 

 has occurred. It seems convenient, therefore, to confine the use of 

 the term archoplasm to that structure alone, and adopt the term 

 idiosome for the modified cytoplasm associated with the Golgi 

 apparatus.] This material has only been observed in germinal 

 tissue, and has not been demonstrated in somatic cells. (Bo wen 

 '22, Gatenby in oocytes ; and others.) Harvey, Parat and Painleve, 

 and others, suggest that the Golgi material probably exists all round 

 the idioplasm, and in fixation runs together to one side, and leaves 

 the interior practically invisible except in those cases mentioned. 

 This certainly accords with the peculiar fact that the idioplasm 

 is always on one side only of the Golgi material, but it appears to 

 be based on the Vacuome Theory, which does not find general 

 acceptance. As already mentioned, the plate or network condition 

 of the higher forms must constantly be borne in mind, and it is 

 difficult to see just how the suggestion would work out in this 

 connection. 



In all probability the idiosomal material is a constant feature 

 of the Golgi complex, and its presence on one side only may be 

 connected with certain one-directional functional activities of 

 the Golgi apparatus as suggested by Nassonov (91) in the case of 

 Protozoal excretion, and as shown by Bowen (10) and others to 

 be the case in the secretory activities of gland cells. 



As regards the chemical nature of the Golgi apparatus, little 

 progress has been made. It is generally acknowledged that it is 

 lipoidal in nature, with probably a protein in association with it. 

 Positive fat tests have been obtained only in two cases by Weiner 

 and Cowdry (128, and vide 12). This is very small evidence for 

 the acceptance of a view of the constitution of a permanent cell 

 element, but it does show at any rate that the reactions can be 



