134 
HISTOLOGY OF ANIMALS. 
line, and their arrangement is so characteristic to a 
practised eye, that the presence of a nerve may be 
asserted with confidence, notwithstanding all the ner- 
vous matter has been destroyed in the process of 
Although areolar tissue is the ordinary nidus in 
which the capillaries as well as the vascular trunks run 
in the various organs and tissues of the body, still there 
are certain situations in which the capillaries are wholly 
destitute of this means of support ; to these, the term 
naked has been applied by Professor Bowman. He 
first detected naked capillaries in the Malpighian bodies 
of the kidneys ; as the capillaries of the brain have 
no investment of areolar tissue, these also may be 
termed naked. I have discovered such capillaries in the 
interior of the glands of Peyer ; in a specimen from the 
Dog, the glands have been divided transversely, and 
capillaries may he noticed crossing and forming loops in 
the interior of the gland, but with no investment or 
support of areolar tissue ; the secreting cells usually 
found in these glands, in all probability, perform this 
office. 
