ANALYSIS AND DISTRIBUTION OF TYPES OF CALICLES. 277 
P. Red Sea 1. The high walls may be either reticular, with traces of septal 
and palic trabecule inside, or solid, as if built up of sharply-tilted median 
flakes upon a synapticular wall or shelf made of wall trabecule, and, 
within, the 12 small septal trabecule as pali. 
Doubtful :— 
P. Solomon Islands 6. The thin lamellate septa with ragged edges, with 
very irregular plate-like pali, seem here and there to admit of this 
interpretation. 
6, i. With the 3 rings of trabecule inside the “extra” median line, but with develop- 
ment of both septal trabecule and pali. 
P. New Guinea 3, With wall, septal, and palic granules separated by concentric 
furrows, and diminishing in size towards the centre. 
P. Sandwich Islands 6. Difficult to unravel, but 3 rings of granules appear at 
times within the thin glassy walls. 
P. Great Barrier Reef 8. With 3 rings present, except where walls are 
reticular. 
P. North-West Australia 3. Appear to be 3 rings greatly cramped together. 
P. North-West Australia 5. All the rings regular and distinct. 
P. Philippines 3. Three rings appear on the top of the stock, but at the sides 
only two (see C, a). 
P. Persia 2. Calicles very angular. Frequent appearance of 3 rings within 
the thin walls. 
[N.B.—In the following two sub-divisions an asterisk means that the presence of extra 
wall trabecule is not uniform over the whole colony, the walls varying everywhere in 
thickness. | 
b, u. With 2 rings of trabecule distinct within the calicle, viz. the septal and the palic. 
The wall trabeculz form, with the extra trabecule, compound dividing walls between 
adjacent calicles. 
*P. Tonga Islands 7. On the under surface only, where alone the extra 
trabeculz appear. 
P. Great Barrier Reef 41, The “wall” trabecule appear regularly round the 
margin of the flattened dividing wall. 
P. North-West Australia 1. Flat flaky walls, with extra and “wall” granules ; 
the septal and palic granules very irregular, but traceable within the 
calicle. 
P. Banda Sea 1. Walls reticular and very irregular in character and 
thickness. 
P. Timor-laut 1. Wherever trabecule are traceable at all, e.g. on the under 
surface, the thick reticular walls surround septal and palic granules 
(see D, a). 
P. Singapore 1. With walls thin or reticular, but with clear ring of septal 
trabecule, 
P. Singapore 4. Thick, solid, granular walls, often with coarse median ridge. 
Septal and palic rings pronounced. 
