The Lens in An Albino Rat 



by 



B. J. Anderson, 



G al way. 



Albinoism has been talked about and written about so much that 

 there has been left to latter day Physiologists little new to tell. 



Some of the older works on Physiology devote a good deal of 

 space to descriptions of varieties of Albinoism, which has at different 

 times been attributed to central nerve action and at others to local 

 tissue disease. 



It is a remarkable fact that central disturbances produce coloured 

 particles over the surface of the body. Lawrence (Lectures p. 191) 

 mentions a case cited by Camper where the abdomen of a pregnant 

 woman was black, as also the areolae round the nipples, whilst the 

 face and legs were quite white. Some Greenlanders are as black as 

 Africans, so it is not altogether the sun that is responsible for skin 

 colouring. 



Carpenter, however, mentions that where a comparatively pure 

 race has been studied, those who have taken up their abode in warm 

 climates have become darker, whilst those who have chosen colder 

 regions have become distinctly paler. 



The common frog in a dark place gets darker and in a bright 

 place gets lighter in the colour. The effect of strychnia on the chame- 

 leon is to produce paleness of the skin. Division of the Sympathetic 

 nerve in the neck of the turbot causes blackness of the dorsal part; 

 and division of a certain nerve in Cuttle fish produces pallor in certain 

 places. The researches of Mr. Poulton may be also given in evidence. 



Internalioiinle Monatssclirift für Anat. u. Phys. X. 5 



