Victorian Fossils. 215 



to the incomplete or vesicular in the Devonian and Carboniferous 

 formations 5 . 



Occurrence. — Silurian (Yeringian). Deep Creek, Thomson 

 River, Gippsland. Collected and presented by the late Rev. A. W. 

 Cress well, M.A. 



Genus Alveolites, Lamarck. 

 Alveolites victoriae, sp. nov. 



Description. — Corallum forming large, more or less erect to 

 hemispherical masses, of irregular, moderately thick-walled, curved 

 corallites, triangular, square or pentagonal in cross section, rarely 

 six-sided. Towards the exterior of the corallum the calices expand 

 and the walls thicken. In transverse section the walls show a 

 conspicuous median residual of a dark colour. Diameter of 

 corallites 1 to 1.5mm. Mural pores large, circular or elliptical, 

 seen disposed in the angles of the corallite. Tabulae thin, hori- 

 zontal, slightly curved or oblique, 8 to 10 in 5mm. Height of 

 corallum about 5cm. ; width about 3.5cm. In many of the coral- 

 lites the vertical ridge is seen in transverse section as a strong 

 projecting tooth. 



Affinities. — The present species resembles A. suborbicularis, 

 Lam. 6 in the comparatively thick walls, as well as in the blunt- 

 ended longitudinal ridge ; the calices in the latter are, however, 

 less regularly polygonal. 



A species tentatively referred to A. suborbicularis was described 

 by the present writer from the Yeringian of Deep Creek, Thomson 

 River, Gippsland 7 . This specimen also has a thick septum or 

 longitudinal ridge ; the corallites increase rapidly from the base 

 of attachment to the distal surface, and measure from 1 to 3mm. 

 in transverse diameter. In this example, however, the calices 

 were less regularly polygonal. 



A somewhat similar form to the above is figured by R. 

 Etheridge jnr. from the Middle Devonian of Arthur's Creek, 

 Burdekin Downs, Queensland 8 , referred to as "Alveolites sp. 

 indet." It differs very slightly from A. victoriae in having more 

 irregular tabulae and more constant five or six-sided corallites. 



5. Sur les Affinites des Genres Favosites, Emmonsia, Pleurodictyum et 

 Michelinia. Annales Soc. Geol. Belgique, vol. XVI., pt. I., 1889, p. 31. 



6. Hist, des Anim. sans Vert., 1816, vol. II., p. 186. See also Nicholson, 

 Pal. Tab. Corals, 1879, p. 126, pi. VI., figs. 2, 2a, b, and woodcut, fig. 20. 



7. Chapman, Rec. Geol. Surv. Vict. vol. III., pt. 3, 1914, p. 310, pi. 

 LVIII., fig. 30. 



8. Geol. and Palaeont. of Queensland, 1892, p. 54, pi. I., figs. 15-17. 



