Victorian Fossils, I'arl IX. 213 



Near to one side of the coralluiii in this specimen there occurs 

 what is evidently a malformed calice of the same stock, form- 

 ing a funnel-shape depression aibout 15 mm. across, and sur- 

 rounded by a ring of calices of the norinal form. The malformed 

 calice suggests at first sight tliat of an Agarieia, but a cast of 

 the bottom of the calice shows it to be similar to that of the 

 smoller corallites of the group. 



Locality arnd Horizon. — Flemington (" Royal Park '). Pro- 

 bably from the Vict. Geol. Surv. coll. Tertiar\' (Barwonian). 

 [915o]. 



Family — 'J'li a.mna.sthakidak. 



Genus — Comoseris, D'Oil)igny. 



.Sub-Genus — Oroseris, Ivlsvards and Hainie. 



Comoseris (Oroseris) australis, sp. nov. 

 (PI. XVI II., Figs. 1, -l). 



Description. — The present example occurs in the form of a 

 ferruginous limestone cast. Base of corallum encrusting. 

 Calices measuring about 6 mm. in diameter ; arranged in a 

 widely flexuous series, and divided by moderately high, rounded, 

 flexuous ridges. Septa (traibeculae) sinuous, strongly curved or 

 angulate, granulate on the sides, and united by synapticula ; 

 about 20 main septal plates, some of which branch into two, 

 usually at a di>tance of about one and a hailf millimetres from 

 the centre of the calice, continuous with the costae of the 

 ridges. Sometimes the branching of the septa occurs nearly at 

 the summit of the ridge. Columella small, formed of the united 

 ends of the septa. Depth of calices about 5 mm. From top of 

 ridge to bottom of calice, 9 mm. 



Observations. — The corallum of the type species ha« been ex- 

 tensively invaded by a boring sponge (? Cliona), the casts of 

 whose orypts stand up prominently on the fossil coral. 



The coral before us bears >ome resemblrnce to certain forms 

 of Stylomaeandra and Latimaeandra, both of which have the 

 calices situated between collines or ridges ; the former genus 

 having a styliform columella, whilst the latter is deficient in 

 that respect. A closer examination of the septal arrangement 



