Dr. G. J. Hinde — Western Australian Fossils. 199 



the layer of wavy concentric fibres, thus corresponding in character 

 to S. reticulata. 



Distribution. — Gascoyne Eiver. Not known whether Devonian or 

 Carboniferous. 



Genus Aulopora, Goldfuss. 



Aulopora repens, Knorr and Walch. PL VIIL Fig. 5. 



1775. MUhporites repens, Knorr & "Walch, Recueil, etc., tome iii. p. 157, pi. vi. 



fig. 1. 

 1826-33. Aulopora serpens, Goldfuss, Petref. Germ. vol. i. p. 82, pi. xxix. figs. la. 

 1879. Aulopora repens, Nich., & Eth., jun., Ann. & Mag. A T at. Hist. ser. 5. 



vol. iv. p. 282. 



There is a single example of this species growing on the surface of 

 Cyathophyllum virgatum, which, as far as its outward characters are 

 concerned, cannot be distinguished from the type forms of the species 

 from the Eifel. The corallites range from 25 to 4 - 5 mm. in length, 

 and from 1 to 1*25 mm. in thickness. The oval or elliptical apertures 

 are between -75 mm. and 1 mm. in width. 



Distribution. — Devonian ? Rough Range, Mount Krauss, Kimber- 

 ley District. This form has been already recorded by Messrs. 

 Nicholson and Etheridge from the Devonian Limestone of Arthur's 

 Creek, North Queensland. 



ANNELIDA. 



Genus Spirorbis, Daudin. 

 Spirorbis omphalodes, Goldfuss, sp. 

 1826-33. Serpula omphalodes, Goldf. Petref. Germ. pi. lxvii. fig. 3. 



There are several specimens of a small Spirorbis, attached to the 

 surface of Cyathophyllum virgatum, which appear to belong to the 

 above species. They are about 2 mm. in diameter and -75 mm. in 

 height, the upper edge of the outer whorl is obtusely angular or 

 rounded, surface apparently smooth. 



Distribution. — Devonian ? Gascoyne River. 



POLYZOA. 



Genus Polypora, M'Coy. 

 Polypora australis, Hinde, sp.n. PL VIIIa. Figs. 3, 3a. 



Polyzoary flabellate, dimensions uncertain. Branches nearly 

 straight, radiating from the base and bifurcating at intervals of about 

 6 mm. ; they are from 1 to 1 -2 mm. in width, flattened, with the dis- 

 sepiments on the same plane. The fenestrules are elongate oval, 

 about 2 mm. in length by -6 mm. wide, and about 2 mm. apart 

 longitudinally. The cells are regularly arranged in quincuncial 

 rows ; there are five cells in an oblique row ; the rows are continued 

 across the dissepiments. The cell-apertures are circular, not appa- 

 rently elevated, small, about -15 mm. in diameter, and separated from 

 each other by about their own diameters. The branches are about 

 •5 mm. in thickness. The reverse side of the frond is concealed by 

 the matrix. 



This species appears to be nearest allied to an Indian form, 



