I?Y K. ETHERIDGE, JUXR. 523 



pointed base ; section circular. Calice deep with high erect walls. 

 Septa about thirty-four, delicate, with an equal number of secondary 

 lamelhie. Proper wall, or theca, much thickened, with immediately 

 within a single circlet of strong quadrangular vesicles, succeeded 

 by a number of ordinary lenticular vesicles. Tabulae irregular 

 and incomplete, sometimes extending almost from wall to wall, at 

 other times lenticular, and either close together or separated by 

 marked loculi. 



Obs. — I take this opportunity of figuring in section a more 

 complete specimen than I was formerly able to do. C. Gregorii 

 is a very peculiar species, of which much of the structure has yet 

 to be elaboi'ated. The calice is deep and nearly as broad at the 

 bottom as at the top. 



Loc. and Horizon. — Reid's Gap, near Townsville (G. Sweet, 

 Colin. Sweet, Melbourne). Middle Devonian. 



Group -CYSTIPHYLLOIDEA. 



Family— CYSTIPHYLLID^. 



Genus — C y s t i p h y l lu m, Lonsdale, 1839. 



(Murchison's Silurian System, p. 691.) 



Cystiphyllu.m australe, Elh.fiJ. 



C. americanuni, var. rmstrale, Eth. fil.,Geol. and Pal. Q'land and N. 

 Guinea, 1892, p. 58, t. 3, f. 13 & 14. 



Obs. — The corallum in this species is shortly turljinate, or 

 cornute, becoming elongate, and often twisted, or curved, and at 

 times even vermiform. It is never of any great diameter, and the 

 surface bears regular, sharp without becoming prominent, more or 

 less equidistant accretion rings, separated by lesser concentric 

 laminjB. The entire structure is vesicular, the vesicles variable in 

 size l)ut large in comparison with that of the corallum, and their 

 walls often become much thickened. There appear to have been 

 a thick outer wall, and an epitheca, but even the former at times 



