35 
of a series of these “ rosettes,” as if the latter were separate centres of growth 
that had ultimately united, with here and there interspaces composed of chains 
assuming a more rambling form of growth. After all, this structure may be 
more imaginary than real, still such an appearance does exist. I have made 
use of this character for the specific name. 
Certain appearances in one specimen of H. peristephesicus led me to 
hope that I had discovered traces of the base of attachment and commence- 
ment of growth of the corallum. Along the uneven base of this particular 
example is a well-marked line, or series of superimposed lines, of a dark colour 
on which all the corallites rest. This base is not actually flat and in one 
plane, hut rolling as if accomodating itself to some surface or object of 
attachment. The examination of thin sections, however, taken along this line, 
ended in disappointment, for the dark line, or lines, appear to consist of 
organic material formed of the flocculent matter accompanying Endophytic 
Eungi, often previously referred to by me in connection with our Palaeozoic 
Corals, and some amount of cellular tissue. I cannot detect any structure 
that could he construed into a commencement of growth. 
Like H. pycnoblastoides , this species resembles II. catenularius , var. 
nitida, Lambe, in the outline of its autopores and mesopores, and also in the 
long rambling outline of the fenestrules, but the corallite chains are far too 
farcimentiform in both the species and variety named to he compared to 
those of H. peristephesicus. 
Loc. and Horizon . — Bed a, Quarry Creek, Portion 222, Ph. Barton, 
Co. Ashburnham (J. 31. Curran and C. A. Sussmilch). 
Collections . — Australian Museum, and Technical College, Sydney. 
IIalysites gamboolicus, 1 sp. nor. 
(Plate V, Figs. 1 and 2 ; Plate VI, Fig. 3.) 
Sp. Char .— Corallum delicate, compact, formed of sub-pyriform to sub- 
hemispherical masses up to five inches by five inches in size. Fenestrules very 
irregular in outline small, on the whole, when compared with the other species of 
similar growth, non-geometric, no two alike, narrow or broad, elongate in either 
direction without being labyrinthine ; sizes 3x2 mm., 4x2 mm., 5x5 mm., 
6x4 mm., 10 x 3 mm., &c.; margins moderately undulate ; walls not highly 
corrugate or ribbed. Epitheca very fine. Corallites long, slightly radiate. 
In allusion to the locality. 
