14 
■with the joresent species, Z. Cidleni. I should have been inclined to refer 
the Colocolo coral to the latter had it not been for De Ivoninck’s pointed 
reference to a fossnla and grouping of the septa. On the latter hand, 
however, it may be remarked that a tendeney to a grouping has come under 
my notice in more than one exam 2 )le of Z. Cidleni, but the extensive 
develojnnent of stereo 2 :>lasma has so far tended to obliterate structure that 
too much stress cannot be jdaced on this j)oint. 
Locality and Horizon. — Binge Berry, Bouchel Brook, Hunter Ptiver, 
Co. Durham ((7. Cullen) : — Horizon doubtful, but jierhaps Carboniferous. Pallal 
Station, Horton Biver, Co. Murchison [C. Cullen): — Horizon ditto. Torry- 
burn, Logan’s Station, twelve miles from Parteson, Co. Durham {Lev. IV. H. 
Yarrington, 31. A., and J. Waterhouse, 31. A.) : — Horizon ditto. 
Zapiihentis (Plehopiiyllum ?) roeusta. Be KonhicJe. 
Plate X, Figs 1-3. 
Zaphrentis rohusta, De Koninck, Foss. Pal, Xouv. Galles du Sud, 1877, Pt. 3, p. 152, t. 5 
f. 9, 9a. 
Sp. Char, — Corallum moderately large, turbinate, but little curved, 
and robust, with ill-defined growth accretions ; proper wall very thick ; 
section circular ; base sharply pointed in the young state, obtuse when older. 
Calice wide and very deep, nearly equal to half the height of the corallum, 
the margin horizontal. Sejita forty-five, slightly curving on their inward 
course, not extending to the centre, which is tabulate, except at the base, 
divided into four groujis, the two dorsal containing nine in each, the ventral 
seven ; counter sejita two ; cardinal sej)tnm strong, extending to the dorsal 
edge of the fossnla ; alar sejita strong and obliquely curved ; stereojfiasma 
not highly develo 2 :>ed ; fossnla jiyriform, ventral, at the base extending to the 
centre ; dissepiments small, and not numerous ; interse 2 )tal loculi as long oval- 
pyriform spaces. Tabulate area moderately large, flat. Buga) simple, 
obtuse, and inconspicuous. Ejoitheca strong and thick, forming short imbri- 
cating frills over the rugae. 
Ohs . — Aecordiug to the late Prof, do Koninck this is distinguished 
from all the j^receding species by its turbinate form, large j^rojiortional diameter 
of its calice, and thickness of the eintheca, features I am able to confirm after 
