far as the external appearance is concerned, to II. australis. The growth and 
outline of the fenestrulcs is also that of II. labyrinthica , Gold f. 1 In the internal 
structure great similarity exists to that of II. escharoides (Lamk.), Fisher- 
Benzon, 2 and the coral so named by the latter author possesses both autopores 
and mesopores, as ours does, thus differing from Nicholson’s conception of 
Lamarck’s species. 
Loc. and Horizon.- — Bell Biver, on L. Smith’s Station, Ph. Copper 
Hill, Co. Wellington, in alternating beds of shale and limestone, the upper 
beds with Conchidium Kniglili , Shy. (J. M. Curran and C. A. Siissmilch ) ; 
Ph. Copper Hill, Co. Wellington (C. Cullen) ; Suntop, Ponto-road, Ph. 
Ponto, Co. Lincoln (C. Cullen)-, Geurie, Ph. Guerie, Co. Lincoln (C. Cullen)-, 
Quedong ( Geol . Survey). 
Collections. — Australian, and Mining and Geological Museums, and 
Technical College, Sydney. 
Halysites pycnoblastoides, 3 sp. non. 
(PI. IV, Figs. 1 and 2 ; PL VIH, Figs. 5 and 6.) 
Sp. Char . — Corallum formed of large sub-pyriform masses consisting of 
slightly radiate corallites, producing colonies up to ten inches by six in size. 
Fenestrules round, oval, quadrangular, and polygonal, occasionally irregular, 
but seldom labyrinthine; sizes 2x2 mm., 3x2 mm., 4x2 mm., 5x1 mm., 
7x2 mm., 10 x 1 mm., and so on ; margins highly undulate ; walls strongly 
corrugate or ribbed. Epitheca transversely striate. Corallites long, up to 
jive inches (and then imperfect). Corallite chains strongly farcimentiform. 
Autopores very numerous, oval or round, one to five in a chain, the average 
two, one and a half millimetres in longest diameter by one millimetre in the 
opposite direction ; septa confined to the autoporal walls only, and distinctly 
visible with the pocket-lens, arranged in from two to three cycles in each 
visceral chamber ; the latter are transversely elongate (parallelogrammatic) ; 
tabulae complete, horizontal, or at times oblique, about half a millimetre apart. 
Gonopores very numerous, greatly exceeding the mesopores in number, 
polygonal or irregular in outline, non-septate ; walls as thick as those of the 
mesopores ; visceral chambers transversely oblong (parallelogrammatic) ; 
tabulae complete, horizontal, about one-fourth of a millimetre apart. 
Mesopores few in number in a corallite chain, but where present large and well 
developed in re-entrant spaces, and transversely elongate (parallelogrammatic) 
to quadrangular; visceral chambers nearly square; tabu he complete, horizontal 
or rolling, about one-third millimetre apart. 
1 Goldfuss, Petrefacta Germanise, 1S20, pi. xsv, f. 5 a. 
2 Fislier-Benzon, Abbandl. Gebeifce Naturwis. Vercin Hamburg, 1871, V, 2 Abtb., pi. iii, f. 1-3. 
3 nu/tJ'djSAaiTToj “ full of buds,” and oides — “ resemblance.” 
