COEALS FROM PUNAFUTI. 27 



Haime's definition of that genus : — " Le j)olypier est simple, 

 pedoncule ou subpedicelle, on ne presente a sa l>ase que des 

 traces d'une adherence ancienne. La columelle est bien de- 

 veloppee et se compose de tigelles prismatiques ou tordues qui 

 se disposent ea faisceau ou en serie. Les palis sent bien 

 developpes, entieris, libres dans une assez grande etendue, inegaux 

 suiyant les couronnes auxquels ils appartienueut ; ils se trouvent 

 devant toutes les cloisons, excejjte devaut celles du dernier 

 cycle. Les cloisons sont debordantes, larges et striees laterale- 

 ment ; la muraille est nue ou ne presente qu'une epitheque 

 rudimentaire." As they have simple wedge-like costae they 

 belong to § A (Trocliocyathes stries), and as they have six equal 

 systems and four complete cycles of septa they belong to §§ B 

 of the genus. 



Teochoctathus tasipormis, n. sp. (PI. 5. figs. 6 & 7.) 



Corallum pedunculate and vasiform, fixed by an expanded 

 encrusting base. Calycular fossa oval, fairJy deep. Septa in 

 six systems and four complete cycles ; primary and secondary 

 septa sutequal in size and conspicuously exsert ; tertiary septa 

 smaller and less exsert ; quaternary septa small, the lateral 

 faces of the septa covered with rows of granules horizontally 

 arranged. Costae of the first three cycles simple, ridge-like, 

 extending down to the peduncle, those of the fourth cycle 

 shorter and less prominent. Peduncle minutely granular. 

 Pali in two circlets of unequal size ; those of the smaller circlet 

 correspond to the primary and secondary septa ; the larger pali 

 in front of the tertiary septa, large, with lateral lobes aad coarse 

 granulations ; no pali in front of the quaternary septa. Colu- 

 mella consisting of from six to eight contorted trabeculge. 



Habitat. Funafuti. 



All the species of Trocliocyatlius described by M. -Edwards 

 and Haime are fossil, but a living species, T. Victories, has since 

 been discovered by Tenison Woods * near Port Jackson, 

 Australia, and Duncan f states that another living species has 

 been found in the "W. Indies. I am not, however, able to find 

 the authority for the latter statement. The species from 

 Funafuti is distinct, and is an interesting example of a com- 



* J. E. Tenison Woods, Proc. Linnean Soc. jS^. S. Wales, ii. 1S78, p. 304. 

 t P. Mai-tin Duncan, .Journ. Linn. Soc, Zool. xviii. 1884, p. 22. 



