MADEEPOEA. 139 



Torres Straits and Great-Barrier Reef. (The habitat of the type specimen is not 

 recorded.) 



«• ? ? 93.4.7.89. (Type.) 



b. Port Denison. Saville-Kent Coll. 92. 6. 8. 120. 



c. Warrior Island. Saville-Kent Coll. 92. 6. 8. 127. 



141. Madrepora tubicinarla. 



Madrepora tubicinaria, Dana, Zoophytes, p. 451, pi. xxxii. fig. 7 ; M.-Edwards & Haime, Coralliaires, 

 t. in. p. 152; ? Verrill, Proc. Essex Inst. 1866, vol. v. p. 23; ? ibid. 1869, vol. vi. p. 100; 

 Rathbun, Proe. U.S. Nat. Mus. 1887, vol. x. p. 19. 



Corallum forming small round subcespitose clumps about 12 cm. high, consisting of 

 several branching stems rising from a common base. Branches little spreading, closely 

 divided, nearly terete, 6 to 8 mm. thick, scarcely at all tapering; apex obtuse. Axial 

 corallites 2 to 3 mm. thick, a little prominent. Radial corallites regular, appressed tubiform 

 or cylindrical, applied at one side nearly or quite to the apex; length 3 to 4 mm., diameter 

 1'6 mm., thin and fragile at the margin, exterior neatly striate; aperture broad and circular, 

 opening upwards ; star narrow, six-rayed. (Dana.) 



Unless the specimen from Tahiti recorded by Verrill should prove to belong to this 

 species, which seems very doubtful, the form has not hitherto been identified by subsequent 

 investigators. 



There is a specimen in the collection of the British Museum, the habitat of which is not 

 recorded, which may belong to this species. It has the following characters : — Corallum 

 subcespitose, hemispherical, 22 cm. diameter and 14 cm. high. The colony consists of 

 numerous forked and closely divided branches arising from an incrusting base, always more 

 or less proliferous near the apex. Branches 1'5 cm. diameter at the base ; distal divisions 

 about 8 mm. diameter. Axial corallites 3 to 4 mm. diameter, hemispherical ; wall thick and 

 porous. The star consists of twelve septa of moderate development, the directives sometimes 

 more prominent than the other primaries. Radial corallites subequal, tubiform, with a round 

 aperture, nariform at first, appressed or a little spreading, length 2 to 3 mm., diameter 1 to 

 1-5 mm. ; inner part of the wall often thin, outer part a little thickened but quite porous, 

 margin not rounded. On the middle divisions the corallites are very short, with a ring-shaped 

 border; on the main branches all are immersed. In the tubular corallites only the directive 

 septa are present, both are of moderate breadth, apparently the inner is often broader than 

 the outer ; below, in the subimmersed and immersed corallites, the star is quite distinct and 

 consists of a well -developed primary series and a more or less complete second cycle. 



Pacific Ocean : Fiji, ? Tahiti. 

 a. ? ? 93.4.7.115. 



142. Madrepora bottae. 

 ? Madrepora pharaonii, M. -Edwards & Haime, Coralliaires, t. iii. p. 143 (part.). 



Corallum cespitose from a central base, with very few immersed corallites below ; height 



