260 MK. J. S. GARDINER OW THE PERFORATE [ Apr. 5, 



7. Madrepora aspera Dana (43). 

 Botuma ; 3 fathoms. 



8. Madrepora scabrosa Quelch (45). 



A horizontally spreading, much divided branch, 14 cm. long, of 

 this species was obtained. The branch is 1'2 cm. thick at its 

 broken end, and the terminal branchlets, which grow up vertically, 

 are about -H cm. thick, 3 cm. below their apices. The corallites 

 correspond very closely to those of the type, but are rather more 

 appressed to the branches, and a few are large and subimmersed. 

 The under surface of the branch is finely echinulate, and tow^ards 

 the base bare of any corallites. 



Funafuti ; 35 fathoms. 



9. Madrepora reticulata Brook (52). 



A specimen 15 cm. long was obtained, which closely resembles 

 the type. Some of the tubular corallites of the under surface are 

 6-9 mm. long and slightly proliferous; they are fused in many 

 places one with another, and by fusion with other branches, 

 towards which they may be growing, give rise to the close reti- 

 culations characteristic of the species. 



Funafuti ; 35 fathoms. 



10. Madrepora profunda, n. sp. (Plate XXIII. fig. 3.) 



Corallum consisting apparently of a number of stems arising 

 almost horizontally from an incrusting or pedicellate base, covered 

 above with low twigs about 4 cm. long by '6 mm. in diameter at 

 the base. Branches often somewhat augular, generally about 

 •9 mm. in diameter, in places forming a very irregular net\vork 

 with slightly elongate meshes. The axial corallites are usually 

 oval in shape, and vary up to 2"5 mm. in long diameter by 1*5 mm., 

 the opening of the calice being about 1 mm. by -G mm., they are 

 about 1 mm. exsert. Eadial corallites near the ends of the branches 

 nariform and somewhat compressed, the rim of the calice extending 

 at right angles to the stem and its opening being oval or boat- 

 shaped ; a few are tubular and slightly proliferous. Toward the 

 bases of the twigs the radial corallites become gradually less 

 prominent, giving place on the main branches to subimmersed and 

 completely immersed corallites. The latter very regularly cover 

 the main branches, and are situate about 3 mm. from one another ; 

 they vary from 1-1-3 mm in diameter. In nearly all the calices 

 the primary septa can be recognized as narrow lamellae, the 

 directives rather more prominent ; in the immersed corallites the 

 secondary septa too are quite distinct. The siu-face of the 

 corallum is dense and very echinulate ; the walls of the corallites 

 are strongly striate, and their edges are much spined. 



Funafuti ; 30 fathoms. 



The specimens on which this species is founded consist of a 

 very large number of fragments, all obtained in the same haul of 



