334 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



Genus Balanophyllia, Searles Wood, 1844. 



Corallum simple, fixed by a large base or pedicellate, more 

 porous than Dendrophyllia ; no costal appendices ; costae fine, 

 close, subequal ; columella well developed, but never projecting 

 from the bottom of the calicular fossa ; septa thin, close, the last 

 cycle well developed and complete ; the distinct costee and the 

 complete development distinguish this genus, which is well repre- 

 sented both as a living and fossil form in Europe. In our Aus- 

 tralian tertiaries it had a large development, but so far, I am 

 only acquainted with one living species in our seas. 



Balanophyllia buccina, n. s. PL 5, figs. 5, a, b, c, d, & PI. 4, fig. 5. 

 Corallum narrowly pedicellate and generally clasping a small 

 shell, subcylindrical or compressed : broad at the summit and 

 rapidly tapering, rarely straight, nearly always curved in the 

 direction of the shorter axis ; calice elliptical, lower at the ends 

 of the longer axis ; epitheca moderately developed, extending 

 about half way up the calice, or appearing in a series of very 

 undulating, disconnected, concentric rings, which are thick, pro- 

 jecting, and corrugated ; costas in series of scattered granules, 

 and sometimes hardly traceable under a uniform worm-eaten 

 appearance ; the wall is very open and honeycombed ; fossa one- 

 third the depth of the whole corallum, and having a broad 

 flaring appearance ; columella very loosely spongy and rather 

 broad ; septa slightly exsert, granular and porous, the higher 

 orders almost as loosely reticulate as the columella, in six 

 systems of five cycles, the sixth and eighth orders uniting in 

 front of the fourth, and the seventh and ninth in front of the 

 5th, close to the wall, and both the laminae thus formed again 

 uniting in front of the third at or close to the columella ; prima- 

 ries and secondaries free, evenly rounded, 6th order the most 

 developed and very thick and jagged at the columella. Fully 

 developed specimens, 25 to 30, major axis 18 to 23, minor axis 11 

 to 14, mil. In smaller specimens only four cycles ; costae very 

 distinct, epitheca faint, in pellicular translucent rings near base. 

 Two young specimens, sometimes cemented together. 



