(-.7 



continuous aud ]n\\v the same structuic and function. 

 The fresh styles are flexible, and very elastic. The colour 

 is a translucent brownish-yellow. In some cases the 

 style, when removed from the intestine, came out quite 

 clean. On other occasions there was a beautiful spiral of 

 green substance (like the matter found in the stomach 

 and rectum) encircling- it, as shown in fig. 36. It might 

 also have a dark axial portion. In cross section (fig. 

 46, a.) under the microscope, the substance of the style is 

 seen to be perfectly homogeneous, with no organised 

 structure and generally Avith but little ditference between 

 the substance forming the axis and that of the periphery. 

 There is, however, a very distinct laminated appearance, 

 as if the style were formed of concentric layers of a colloid 

 substance, and this gives it a striated appearance in 

 longitudinal section. The dark axis that occurred in one 

 specimen was due to a thick dark ring which was 

 apparently formed of a similar substance to that found 

 encircling the outer surface of some of the styles and, 

 like it, arranged in a spiral manner. The concentric 

 dark rings seen in transverse section are also probably 

 due to the same green food matter from the stomach. 

 Barrois, in a detailed account of the structure and 

 physiology of the style (23), gives descriptions of the 

 chemical composition and reactions ; and these are borne 

 out by the later work of Mitra, whose analyses show that 

 there is about 88 per cent, of water in the style, about 

 12 per cent, of proteid, and about 1 per cent, of salts. 

 The style is slowh' soluble in water, and the solution is 

 neutral. The tests made on the style of Fcefen. agree with 

 those of Mitra on Anodon (26) and Barrois on Card/ inn 

 (23). 



The presence of proteid was iiidicated by the xantho- 

 pi'oteic reaction (a white preci])itate is given l)y addition 



