268 MADREPORARIA. 
P. Ellice Islands 16. A fragment, branches compressed and distorted. 
P. Solomon Islands 3. Short, thin, delicate tips, flattening and forking. 
P. Solomon Islands 9. Stout stems, with thin, tapering, curving branches. 
P. New Guinea 1, Branches and branchlets cylindrical, tips seldom flattening. 
P. Pelew Islands 1. Like branching goat or antelope horns. 
P. Caroline Islands 7. Dense dichotomously branching clusters, branchlets all reaching 
to about the same height. 
P. Caroline Islands 2. Stems fusing irregularly, submoniliform, with globular twigs. 
P. Sandwich Islands 1. Branches stout, compressed, erect. 
P. Sandwich Islands 5. Dividing dichotomously, with short, stout, flat-topped 
branchlets. 
P. Gulf of California 3. Branches low, crowded, fusing, cylindrical. 
B P. Great Barrier Reef 12. Stems faintly constricted, stout, and very smooth, branch- 
lets thin, curving and flattening at tips. 
P. North Australia 1, Tops swell and divide into flat-topped irregular knobs. (Cf. 
Section C.) 
a P. North Australia 4. Erect, rough, angular stem, breaking up into rough, curved, 
divergent branches. 
P. North Australia 5. Single, stout, smooth stem, forking and tapering into points 
lke a bird’s claw. 
P. North Australia 7, Thin, dichotomously branching, here cylindrical, there some- 
what compressed. 
a P. North Australia 8. Short, thick, smooth stem, with long, thin, bent and tapering 
branches scattered over it. 
P. Banda Sea 2. Branchlets thin, compressed and forking at small angles. 
a P. Java Sea 2. Long, thin, tapering spikes, sparsely branching. See also Section C, a. 
a P. Philippines 2. Short stem, breaking into small clusters of short, thick, outwardly 
curving points. 
B P. China Sea 9. A close tangle* of stout nodulated, bent branches, freely fusing to- 
gether. 
P. China Sea 10. Tangles* of rough, fusing, angular stems, mostly very thin, with 
explanate outgrowths. See text, p. 173. 
a P. China Sea 18. Tangles* of stout cylindrical stems, with tapering round-tipped 
branchlets. 
a P. Singapore 7. Rounded stems and branchlets, forking at wide angles and freely 
fusing together. 
a P. Kokos Islands 1, Branchlets flatten and divide rapidly into nipple-shaped tips. 
B P. Maldives 3. Rounded branches and branchlets, forking at wide angles and freely 
fusing (occurs in large, free, lenticular masses). 
. Mauritius 5, Also free. Supported by nodulated branches and_ branchlets, 
radiating outwards in all directions. 
P. Amirantes 2. Irregular in thickness and manner of forking. Branchlets often 
as thin, tapering, bent spurs. 
P. Dar-es-Salaam 1, Branching from the ground, growing among “sea grass.” 
ty 
* Tangles are mostly the débris of generations of broken down and overturned stocks which 
new growths bind together. Only the general characters of the stems can be made out. 
