no 
Formation and Localities. — Two specimens of this species were sent 
me, one of wliicli came from Jervis Bay and the other from Colocolo. 
LITHOSTBOTION, Lwyd. 
1. Lithostrotion IREEGIJLAEE, Phillips. 
PI. V, Pig. 1. 
Screw Slone, Eobert Plot, 1668, Nat. Hist. Staffordshire, p. 195, pi. 12, fig. 5. 
Litliodendron irregulare, J. Phillips, 1836, Geol. Yorkshire, II, p. 202, pi. 2, fig. 14 and 
15 (non Michelin). 
„ „ Milne Edwards and J. Haime, 1851, Polyp. Foss. Terr. Pah, 
p. 836. 
,, „ L. G. de Koninck, 1872, Nouv. Eech. Anim. Foss. Terr. Garb. 
Belg., p. 31, pi. 1, fig. 5, and pi. 2, fig. 1. 
This coral, of which I gave a minute description in 1872, forms very 
large arborescent clusters. Its corallites are very long, cylindrical, and 
slightly flexnons; their diameter is from four to five millimetres. The 
columella projects slightly, and is a little compressed. The nnmher of septa 
varies from sixteen to twenty-four, according to the age of the specimen. 
All these characteristics exist in the Australian specimens before me, and 
prevent me confounding it with other species of the same genus. 
Formation and Localities. — This species is widely distributed through- 
out the Carboniferous Limestone of England, Ireland, Russia, and Belgium, 
where M. Ed. Dupont has seen it in many places as a distinct bed from fifteen 
to twenty centimetres thick, intercalated in the limestone, and serving as a 
constant horizon in classifying the strata enclosing it. It would he interest- 
ing to know if this species affects the same behaviour in Australia, where it 
is found in a fine-grained, friable, bluish-grey limestone at Port Macquarie, 
Piper’s Creek. 
2. Litiiostrotion basaltieorme, TV. B. Conyheare and W. Phillips. 
PI. V, Fig. 2. 
Lith 0 sir 0 lion , E. Luidin.®, 1760, Lithopbyl. Erit. Icbnogr., p. 120, pi. 23, fig. 1,' 
,, Parkinson, 1820, Organic Ecmaius of a former World, II, p. 42, pi. 5, fig. 3 
and 6. 
