NATURE OF EXCRETORY PROCESSES IN MARINE POLYZOA. 143 
proximal end of the zoecium. The first part of the stomach 
was being developed as an outgrowth of the cecum, passing 
towards the pharynx. The tentacles were obviously increasing 
greatly in length, although their number had been for some 
time complete. 
At a later period (401st hour) the rectum was distinctly 
differentiated from the rudiment which gives rise to the 
stomach, intestine, &c., and contained the so-called ‘‘ meco- 
nium.” The tentacles were individually contractile, and the 
stomach had met the pharynx, but without yet fusing 
with it. 
At the 424th hour (same individual) the “‘ brown body” was 
further covered by the cecum, and the intestine was becoming 
bent over to one side of the zoecium. The funiculus was pre- 
sent as before, passing along the back of the bud to the distal 
end of the zoccium; it has been omitted from most of the 
figures for the sake of clearness. 
At the 448th hour (fig. 5) the cecum had grown over about 
half of the surface of the “brown body,” which had by this 
time retreated still further from the proximal end of the 
zocecium. The tentacles had increased greatly in length, and 
the intestine was still further bent over to one side. The in- 
termediate tube, connecting the rectum with the tentacle- 
sheath, is clearly seen in fig. 5. This tube, which is a normal 
feature of the polypide, was first noticed in this individual at 
the 353rd hour. 
At the 496th hour the curvature of the intestine to one side 
was becoming still more pronounced (fig. 6), and the *‘ brown 
body” was by this time not far from the middle of the zocecium. 
A projection of its substance into the lumen of the cecum in- 
dicated its approaching dissociation into fragments destined to 
pass into the alimentary canal. It had become so dark in 
colour that the mass of indigo-carmine contained in its interior 
could no longer be seen, the “ brown bodies” being, in indi- 
viduals of this colony, much darker than the brown-red colour 
so characteristic of the normal “ brown body.” 
At the 520th hour the “ brown body” projected still further 
