CORALS FBOM rUJSTAFUTI. 29 



a species differing from T. armatus only in possessing six spines 

 instead of five, shows deltoid pali, and the spines are much 

 shorter and thicker than in mj specimens. Mantell's figure 

 of T. Mantelli shows only the base of the specimen, the mouth 

 of the calyx being imbedded in the rock in which it was found, 

 but, as far as can be seen, the proportions of the spines and the 

 characters of the costse agree very closely with my specimens. 

 In the absence of a description and of any information about 

 the characters of the septa and pali, it is not possible to say 

 whether the species are identical or not. 



Dennant's StepJianotrocJius Tatei, though superficially ex- 

 tremely like the Funafuti specimens, differs entirely from them 

 in the arrangement of the septa and in the absence of pali 

 (Trans. Eoyal Soc. S. Australia, xxiii. 1898, p. 117, pi. 3. 

 fig. 1, a-e). 



I must therefore describe the Funafuti specimens as a new 

 species. 



Teochoctathus HASTATtrs, n. sp. (PI. 5. figs. 2-5.) 



Corallum free, short, bowl-shaped, with a scar of attachment 

 at its base. Calycular fossa oval, deep. Septa in six systems 

 and four cycles, the fourth sometimes incomplete. The primary 

 septa somewhat larger than the secondaries, both very exsert : 

 the tertiary and quaternary septa smaller and less exsert ; the 

 faces of the septa covered with prominent pointed granulations 

 arranged in radiating rows. Costae broad, closely crowded 

 together, of nearly equal width, extending down the upper 

 two-thirds of the calyx, covered with fine granulations. The 

 costse of each primary septum with the two quaternaries adjacent 

 to it produced outwards to form six long horizontally projecting 

 tapering spines ; in cases in which five spines only are present, 

 the deficiency occurs at one end of the long axis of the calyx. 

 The base of the corallum smooth, and often nacreous in 

 appearance. Pali in front of the primary and secondary septa 

 small and inconspicuous ; those in front of the tertiary septa 

 large, prominent, and covered with spiniform granulations. 

 Columella relatively small, consisting of from 10-12 contorted 

 trabeculse. 



Hcthitat. Funafuti. 



Of the five specimens of this species, one, a dead and worn 

 example, has six spines corresponding to the six primary septa, 

 the others have five spines. The number of spines being 



