94 



MADREPORAEIA. 



nariform, spreading, with a few immersed ones between. In the specimen referred by 

 Bassett-Sraith 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 1'5 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). 



b. James Town, St. Helena. 

 c, d. Tongatabu. 



e. ? 



_ V 

 _ ? 



/• 



9- 

 h. 



j,k. V 



/, m. China, probably South. 

 n. ? 



? 0. Treasury Is., Solomon Is. 



? p. Moreton Bay. 



Var. sinetisis. 



Or-e. Tizard Bank, 6 fath. 



/• 



81. 6. 28. 8. 

 91. 3. 6. 14 & 16. 



Thomas Heddon, Esq. [P.]. 58. 5. 27. 3. 

 A. E. Craven, Esq. [P.]. 

 J. J. Lister, Esq. [P.] . 



? 93. 4. 7. 170. 



Purchased. 40. 5. 15. 26. 

 Purchased. 44. 6. 10. 5. 

 Purchased. 40. 5. 15. 24. 

 Purchased. 46. 7. 1. 18. 



? 93. 4. 7. 98 & 99. 



Fisheries Exhibition. 84. 2. 26. 15 & 16. 



W. Thomson Coll. 91. 2. 3. 4. 



Dr. Guppy [P.]. 84. 12. 11. 19. 



Saville-Kent Coll. 92. 6. 8. 306. (Dead colony.) 



H.M.S. 'Rambler.' 

 & 93. 4. 7. 93. 

 ? 93. 4. 7. 100. 



89. 9. 24. 89, 91, 113, 118, 



85. lladrepora sjrmmetrica. (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). 



Corallam broad, flat, corymbose, with a short central base, scarcely pedicellate, 35 to 



