DR. G. J. HINDE ON RECEPTACULITIDA, 849 
The delimitation of the plates, originally composing the inner layer, 
is shown in 3/, whilst in 3g it has partially disappeared. 
Fig. 3h/-m. Different views of partially detached spicules, enlarged four times. 
3h. Two spicules in their natural position, showing at their bases the 
summit-plates, the broken truncated ends and the canals of the hori- 
zoutal rays, and the neck-like constriction of the vertical rays; whilst 
at the top the vertical rays are connected with portions of the inner 
layer which unites them together. 
32,7. Spicules showing hollow canals in the inner layer at their summits. 
3, Spicules in a reversed position, showing in one the thin summit- 
plate immediately above the truncated horizontal rays. 
31, m. Two views of the same spicule, showing the different direction of 
two opposite horizontal rays; that in 3/ pointing downwards, and 
its opposite, as seen in 3m, directed upwards; in both the rays ar 
broken, and only their hollow bases remain. At the summit of the 
spicule is shown the interior of one of the canals which penetrate 
the inner layer. 
eC 
