STRUCTURE OF THE SPLEEN. 413 



sheathed, as before said, by the fibrous coat, which they, 

 so to speak, carry into the spleen with them. Ending in 

 capillaries, they either communicate, as in other parts of 

 the body, with the radicles of the veins, or end in lacunar 

 spaces in the spleen-pulp, from which veins arise (Gray). 

 On the face of a section of the spleen can be usually 



Fly. ioS.* 



seen, readily with the naked eye, minute, scattered, rounded 

 or oval whitish spots, mostly from -^ to ^ inch in dia- 

 meter. These are the Malpighian corpuscles of the spleen, 

 and are situated on the sheaths of the minute splenic 

 arteries, of which, indeed, they may be said to be out- 

 growths (fig. 1 08). For while the sheaths of the larger 

 arteries are constructed of ordinary connective tissue, this 

 has become modified where it forms an investment for the 



* Fig. 1 08. The figure shows a portion of a small artery, to one of the 

 twigs of which the Malpighian corpuscles are attached. 



