30 MADEEPORAEIA. 



g. St. Kitt's. ? 93. 4. 7. 25. 



h. ? Mr. Sowerby [P.]. 45. 5. 21. 136. 



«. ? ? 37.6.10.12. 



j-y. ? ? 93. 4. 7. 26 to 41. 



z-bb. Port Darwiu. Saville-Kent Coll. 92. 6. 8. 210 to 212. 



cc. Thursday Island. Saville-Kent Coll. 92. 6. 8. 214. 



2. Madrepora secnnda. 



Madrepora seeunda, Dana, Zoophytes, p. 481, pi. 40. fig. 4 ; M.-Edwards & Haime, Coralliaires, t. iii. 



p. 138 ; Verrill, Append, to 1875 ed. Dana's Corala & Coral Islands, p. 333 ; Studer, Mitth. 



naturf. Ges. Bern, 1880, p. 18; Eathbnn, Proc. U.S. Nat. Mus. 1887, vol. x. p. 17 (under 



M. noUlis); Ortmann, Zool. JB. 1888, Bd. iii. p. 150 (part.); ibid. 1889, Bd. iv. p. 504; 



?Ba88ett-Smith, Ann. Mag. Nat. Hist. 1890, vol. vi. p. 452. 

 Madrepora nohilis (part.), Verrill, Bull. Mus. Comp. Zool. vol. i. 1864, p. 40, and later papers; {non 



Quelch, ' Challenger ' Reef Corals, p. 150). 



Corallum arborescent ; branches numerous, terete, 12 to 17 mm. thick, summit 

 hranchlets 8 mm. thick, gradually tapering. Corallum scabrous ; axial coraDite 2 mm. 

 broad. Radial corallites rather crowded, equal, nariform or dimidiate, and very much com- 

 pressed, hardly stout, 2 to 3 mm. long; obsolescent on the inferior side of the branches. 

 Star distinct, the directive septa quite prominent. Height of the corallum 46 cm. or more. 

 {Dana.) 



A specimen in the Saville-Kent Collection agrees well with Dana's description and 

 figure, and is quite distinct from M. cervicornis. The branches are 1'7 cm, diameter, laxly 

 coalescent. Axial corallites 3 mm. diameter, little exsert ; some of the radial corallites 

 which form new outgrowths have the same diameter, and may be 1 cm. long and bear only 

 a few bud-corallites. At a later stage these form branchlets 2'5 cm. long, and sometimes 

 only 3'2 mm. diameter near the base, provided with numerous bud-corallites excepting near 

 the apex. Radial corallites rather distant, as figured by Dana, not crowded, as noted in 

 his description, thin- walled, tubo-nariform or dimidiate, 3 to 4-5 mm. long and 1-2 to 

 1'6 mm. diameter; those near the apex much compressed, with smaller ones between. Star 

 scarcely developed ; two narrow directive septa are usually present, and sometimes indications 

 of others. Corallum porous ; surface spongy-echinulate ; wall striato-reticulate, not echinu- 

 late unless near the base. 



Indo-Pacific Ocean : Singapore, Ceylon, ? China Sea, Great-Barrier Reef. 



a. Port Denison. Saville-Kent Coll. 92. 6. 8. 7Q. 



? b. Tizard Bank, 5 fathoms. H.M.S. ' Rambler.' 89. 9. 24. 104. 



c. Baudin Is., N.W. Australia. H.M.S. 'Penguin.' 92. 1. 16. 6 (part). 



3. Madrepora crassa. 



Madrepora erassa, M.-Edwards & Haime, Coralliaires, t. iii. p. 135 {non Ortmann, Zool. JB. 1888, 

 Bd.iii. p. 149). 



Corallum stout, arborescent, each branch giving rise to a cluster of little-spreading 

 branchlets, more proliferous near the apex and with occasional fusions from one branch to 



