60 
species. The ramose characters of S. australis, S. ovata, and S, Leichhardti 
are sufficiently marked to distinguish them from S. tasmaniensis, whilst the 
frondescent condition of the fossil above referred to, from Tasmania, is unlike 
any of the other Australian Stenoporce. 
Locality^ and Horizon. — Hunter Hiver Railway Bridge, Singleton, Co. 
Durham [T. TF. Jd. David, D.A.) ; Maitland Vale, near West Maitland, Co. 
Durham (7^. Jf . Thompson, Jil.D,'): — Upper Marine Series. 
Stenopora tasmaniensis, Lonsdale\ 
PI. IV, Figs. 3 and 4 ; PI. V, Figs. 7 and 8 ; PI. VII, Fig. 9. 
Stcnopora tasnt an icnsis , Lonsdale, in Darwin’s Geol. Obs. Vole. Islands, 18M, j). 161. 
Stcnopora tasmaniensis, Lonsdale, in Strzelecki’s Pliys. Descrip. N. S. Wales, &c., 1815, p. 
262, t. 8, L 2-2. 
Stcnopora tasmaniensis, M‘Coy, Ann. Mag. Nat. Hist., 1847, XX, p. 226. 
ChiCtetes tasmaniensis, Dana in Wilkes’ U. S. Explor. Exped., 1849, X (Geology), p. 711, 
Atlas, t. 11, f. 1-Sa. 
Stcnopora tasmaniensis, Nicholson and Etlieridge, . I nnr., Ann. Mag. Nat. Hist., 1886, XVII, 
p. 178, t. 3, f. 9-12. 
Stcnopora tas^naniensis, .lohnston, Geol. Tasmania, 1888, t. 21, f. 3-35. (Copied from 
Lonsdale.) 
(Compare S. gracilis, Dana, Loc. cit., p. 712, t. 10, f. 15, <r-c.) 
Sp. Char. — Corallum dichotomously ramose, varying from three to 
eleven-sixteenths of an inch in diameter ; branches cylindrical, hut frequently 
swelling and decreasing in size during their course, especially towards their 
apices, sometimes contorted ; peripheral portion of the corallum very 
narrow and much reduced, the axial region being correspondingly wide. 
Corallitcs deflected from the axial line at a very low angle, bending gradually 
and slowly outwards, polygonal in the axial region, becoming more cylin- 
drical towards the periphery ; calices oval, about one-third millimetre in 
diameter, disposed in slightly oblique rows, giving rise to a quincuncial 
arrangement, their longer axis corresponding with the long axis of the 
' Sienojm-a ovafa \va,s first recorded as a New Soutli Wales fossil by M‘Coy, simply with the retn.ark — 
ommon in Darlington Sandstone (Ann. Mag. Nat. Hist., 1847, XX, p. 2'26) ; Dana next noted its occurrence at 
Harper’s Hill, near West Maitland (Wilkes’ U. S. Explor. Exped., Vol. X, 1849, Geology, p. 712) ; and the late 
Rev. W. B. Clarke gave Singleton Bridge as a third locality (Sed. Form. N. S. Whiles, 4th Edit., 1878, ji. 135). 
^ Non Stmopora tasmaniensis, Nicholson, Tab. Corals Pal. Period, 1879, p. 281, f. 38. 
