152 Journal of the Asiatic Society of Bengal, [N.S., XVIII, 
in the walls of mesodermal coelomic tubules, there is therefore 
still more reason for assuming that their mode of function 
differs from that of other gland cells. So far as I know gland 
cells can if required be developed in any duct, passage or 
position in any germ-layer of the body—in the brain ventricles 
and buccal cavity (ectodermal), in the gut and its outgrowths 
(endudermal), in the genital ducts, urethra, supra-renal bodies, 
and on blood-vessels (mesodermalj—and I am not aware that 
difference of locality of development has in any of these cases 
ever previously been advanced as a reason for assuming that 
their modes of producing secretions must therefore differ in 
principle. The kidney again is said to differ from all other 
(Hg) below that in the aorta, whereas the secretion pressure 
of origin and function which are said to distinguish the kidnev 
gland cells from other gland cells as an excuse for interpreting 
from that of the latter are non-existent. 
_ 4 proceed to the consideration of some of the remaining 
preces of evidence advanced in favour of the neo-Ludwig 
