94 MADREPORARIA, 
nariform, spreading, with a few immersed ones between. In the specimen referred by 
Bassett-Smith to M. efflorescens nearly all are immersed. In the specimen which most 
closely resembles M. spicifera the branchlets on the upper surface are rarely over 7 mm. 
long, a great many are only 4 mm.; some are distinctly tapering, others stout and blunt at 
the apex. Radial corallites of the branchlets short, labellate, rather spreading and unequal, 
relatively distant, with the wall thin but firm, about 1 mm. diameter and rarely over 1°5 mm. 
long; on the upper surface of the main branches nearly all the corallites are immersed. 
Another specimen differs in having nearly all the diminutive branchlets blunt at the 
apex, with prominent short, round, spreading, labellate, radial corallites, which are not 
confined to the branchlets, but also occur on the upper surface of the main divisions; many 
are 15 mm. diameter across the lip. In a third specimen prominent corallites almost 
entirely take the place of immersed ones, on the upper as well as on the lower surface of the 
colony. Two other specimens are more or less proliferous, one of them (M. efflorescens, 
B.-Smith), in addition to the naked under surface, differs from the others in having very 
short simple or proliferous branchlets, consisting of an elongate axial corallite with elongate 
acuminate and appressed radial ones; the axial corallite may project 3 mm. in such cases, but 
in other parts the branchlets are stouter and closely resemble those of the other specimens. 
Indo-Pacific Ocean: Fiji, Tongatabu, New Ireland, Salawatti, New Guinea, New 
Caledonia, Solomon Islands, China Sea, Singapore, Mergui Archipelago, Ceylon, Gulf of 
Aden; St. Helena. 
a. South Seas (? St. Helena). Thomas Heddon, Esq. [P.]. 58. 5. 27. 3. 
b. James Town, St. Helena. A. E. Craven, Esq. [P.]. 81. 6. 28. 8. 
c, d. Tongatabu. J. J. Lister, Esq. [P.]. 91. 3. 6. 14 & 16. 
e. is e198. 4.7) 170! 
jf. —? Purchased. 40. 5. 15. 26. 
g. —? Purchased. 44. 6. 10. 5. 
5 ——= fk Purchased. 40. 5. 15. 24. 
i. ——? Purchased. 46. 7. 1. 18. 
jy ke ? 2? 93. 4. 7.98 & 99. 
l,m. China, probably South. Fisheries Exhibition. 84. 2. 26. 15 & 16. 
nN. ? W. Thomson Coll. 91. 2. 3. 4. 
? o. Treasury Is., Solomon Is. Dr. Guppy [P.]. 84. 12. 11. 19. 
? p. Moreton Bay. Saville-Kent Coll. 92. 6. 8.306. (Dead colony.) 
Var. sinensis. 
a-e. Tizard Bank, 6 fath. H.M.S. ‘Rambler.’ 89. 9. 24. 89, 91, 118, 118, 
& 93. 4. 7. 93. 
f. —? ——? 93. 4.7. 100. 
85. Madrepora symmetrica. (Plate XV.) 
Madrepora symmetrica, Brook, Ann. Mag. N. H. 1891, vol. viii. p. 470 (? non Rehberg, Abh. naturw. 
Ver. Hamburg, 1892, Bd. xii. p. 33). 
Corallum broad, flat, corymbose, with a short central base, scarcely pedicellate, 35 to 
