TWO NEW SPECIES (JF THE PHOROXIDEA. 
279 
is closely opposed to the septum. I do not know whether 
this would accounc for the septum appearing to give off an 
off-shoot towards the epistome, which Gilchrist (7, p. 156) 
stated required further examination. 
Some of the 2 :>eritoneal cells covering the part of this 
blood-vessel in the lophophoral coelom near to the septum 
appear to hypertrophy, and become granular and possibly 
assume an excretoi-y function. 
Nervous System. — The nerve-ring’ has its usual position 
Text-fig. 14. 
Tlie posterior part of a transverse section tliroiigli the region 
of tlie anterior nephridial funnels, (x 60.) 
about the level of the diaphragm, but is protected on its outer 
surface by the very distinct collar. 
The punctated sub.staiice forming the ring (Fig-. 9, n. r.) 
contains a few cells and is traversed by delicate fibrils. 
These, I think, must be nerve-fibres going to the epidermal 
cells, and not mereh' inner boundaries of these cells as has 
also been suggested, for similar small bundles of fibres pass 
out at intervals and cross the base of the collai- and enter the 
epidermal cells, forming its outer layer (Fig. 9,/.). 
The whole layer of nervous tissue forming the ring is 
narrower and more elongated than in most species of Phoronis, 
and there is no indication of its becoming separated from the 
epidermis, as Gilchrist (7, p. 156) suggested might possibly 
