XXVII 



ON THE ULTIMATE STRUCTURE AXU RELATIONS OF 

 THE MALPIGHIAN BODIES OF THE SPLEEN AND 

 OF THE TONSILLAR FOLLICLES 



Journ. Microsc. Set., vol. ii., 1854, //. 74-82 



The first account of those peculiar whitish corpuscles, discovered 

 by Malpighi and to be met with, more or less distinctly marked, in 

 the spleen of every animal, which at all satisfies the requirements of 

 modern anatomical science, was given by Professor Miiller, in his 

 Archiv. for 1834. Mtiller describes with great accuracy the mode in 

 which these bodies are supplied by minute arteries, and explains that 

 they are, in fact, outgrowths of the adventitious tunic of those arteries. 

 He states that, by means of fine injections, he found that " the arterial 

 twigs sometimes passed by the side of the Malpighian bodies without 

 giving off any branches to them — sometimes went straight through 

 the whole body or a part of it, in which case, however, no portion of 

 the arteries terminated in them. These fine arterial twigs appear less 

 to pass through the middle of the corpuscles than to run on their walls 

 and then to leave them. When an arterial twig divides into many 

 minute branches in the Malpighian body, which never takes place 

 upon its surface, but always in the thickness of its walls, these 

 arterioles pass out again to be distributed as very minute branches in 

 the surrounding red pulp : in fact, the ultimate termination of all the 

 finest penicellate arteries is in this red substance. From all this I 

 have become convinced that the white bodies, as mere outgrowths of 

 the tunicce adventitm, have no relation with the finest ramifications of 

 the arteries." 



With regard to another important point, — whether the Malpighian 

 bodies are hollow or solid — Professor Miiller's statements are less 

 definite. In the commencement of his article he affirms, in opposition 



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