64 
than S. ovata. 2. The character of the acanthoj)ores just described. 3. The 
narrow peripheral, and wide axial portions of the coralluin. 4. The confluent 
moniliforin expansions of the corallite walls. 5. The calice mouths some- 
times partially closed by perforated diaphragms. 
AYith regard to the synonomy, only two points need be touched upon. 
The figures given by Prof. II. A. Nicholson, in his “ Tabulate Corals of the 
Palrcozoic Period,”^ under the name of Stenopora tasmaniensis, do not 
represent that species, but, as pointed out subseq^uently," are referable to 
Stenopora orata, Lonsd. I think it is possible that S. gracilis, Dana, sp., 
may be referable here. The long non-constricted corallites represented in 
Dana’s Pig. 10« correspond better with those of this species than they do with 
those of any other ; whilst the illustration of the corallite mouths, in his Pig. 
!()/>, have a certain resemblance to some states of those of S. tasmaniensis, 
Avhen the acanthopores arc not visible. 
Locality" and Horizon. — Summit of Harper’s Hill, near West Mait- 
land, Co. Northumberland {C. Cullen) ; Pail way Cutting, Harper’s Hill, 
ditto, (C. Cullen) Lower Marine Series; Gerringong, near Kiama, Co. Camden 
(C. Clllleii) : — Upper Marine Series, 
■ P. 281, f. A & ]?. 
^ Ami. Mag. Nat. Hist., 1886, XVII, p. 175, note. 
5 Prof. M‘Coy mentioned Darlington as a locality for S. tastmaniensis, in sandstone (Ann. Mag. Nat. Hist., 
1847, XX, p. 226) ; Dana recorded it from a typical locality. Harper’s Hill, near West Maitland (Wilkes’ U. >S. 
Kxplor. K.xped., Vol. X, Geology, p. 711). 
