14 
Genus — ALVEOLITES, Lamarck. 
1. Alveolites eepens, Foiigt. 
3Hllepora repens, Pougt., 1749, Amoeu. Acad., I, p. 99, pi. 4, fig. 25. 
„ raniis vagis, Idem, Hid., p. 98, pi. 4, fig. 14. 
,, repens, Lonsdale, 1839, in Murchison’s Silurian System, p. 688, pi. 15. 
Alveolites repens, Milne Edwards and J. Haime, 1851, Polyp. Eoss. Terr. Pal., p. 258. 
,, ,, Idem, 1852, Mon. Brit. Eoss. Corals, p. 263, pi. 62, fig. 1. 
,, ,, Salter, 1859, in Murchison’s Siluria, p. 53, pi. 42, fig. 30. 
Coral ramose, composed of rather slender and often joining branches. 
Calices very small, and little broader than long, outer lip a little hollowed out 
in the middle. 
I have been able to compare the only specimen of this species sent to 
mo with specimens from Gothland, and have thus been able to satisfy myself 
as to their undoubted identity. 
Horizon and Locality. — This species is common in the Upper Silurian 
of England and Sweden, In Australia it is more rare in the mottled quartzite 
of Burrawang. 
2. Alveolites eapa, L. G. de Koninck. 
PI. I, fig. 2. 
Coral in a thin layer, corallites very inclined, small, walls not perforate; 
calices round, oblique, deej), and provided with very thin and indistinct septa; 
diameter about a millimetre ; the thickness of the external border not being 
very regular, the arrangement of the corallites cannot be investigated any 
more. 
jRelations and Lifferences. — The general form and arrangement of 
the corallites in this species resembles that of Alveolites Fougti, Milne 
Edwards and J. Haime. Nevertheless it is readily distinguishable from that 
species by the small size of the calices and complete absence of mural pores. 
Horizon and Locality. — One specimen of this species was collected by 
Mr. W. B. Clarke at Burrawang, in a reddish quartzite. 
