THE CATALYST ENTELECHY IN DIFFERENTIATION 



207 



malignant) embedded in an otherwise normally developed organism, 

 and showing various degrees of morphological differentiation. Despite 

 the chaotic assembly of various tissues and organs (in one case dozens 

 of tiny "tonsils" in separate little patches of "pharynx"), the specific 

 glands may function and the muscle be capable of contraction. By in- 

 jection of 5 per cent zinc chloride into the testis of a fowl, H. J. Bagg 55 

 found in many the development of "teratomata" sometimes big enough 



lil" '" , 



]fi ', I r,-|l . • U J'' 



Figure 31. Grades of otocephaly. Semi-diagrammatic ventral views of the head 

 and throat of the 12 grades in comparison with the normal (o). [Courtesy Journal 

 of Agricultural Research, Vol. XXVI, No. 4 (1923)]. 



to fill most of the visceral cavity, and containing cartilage, bone, fat, 

 muscle, skin, feather follicles, glands, and also nerve, connective and 

 cancerous tissue. Since zinc chloride is a powerful disperser of some 

 proteins (it will fluidify glue or gelatin), it might well be that a variety 

 of specific proteins (prosthetic groups or carriers) in the fowl's gonads 

 or sperms are dispersed and set free to act with the carriers or pros- 

 thetic groups normally present in adult tissue, but functionless unless 

 converted into active catalysts by appropriate combination. 



Other groups of abnormalities, mainly involving malforma- 

 tions, where the animal or plant departs greatly in form or struc- 

 ture from what is usual for the species, are termed monsters. 



