108 PHYSIOLOGY 



They are often designated as albumoids. Of their composition we know 

 practically nothing. Under this name are grouped such substances as those 

 forming the membrana propria of glands, the sarcolemma of striated muscle, 

 the albumoid of the crystalline lens, the ground substance of the chorda 

 dorsalis, the organic basis of fish scales, and many similar substances. In 

 every case the substance is characterised necessarily according to its place 

 of origin, little or nothing being known as to its chemical composition. 



