A 



A. H. Foord — Western Australian Fossils. 105 



Geological Department of the British Museum, and he believes them 

 to belong probably to the Rhodocriuidce or Actinocriuidtf, but he 

 cannot refer them to any genus. 

 Locality. — Gascoyne River. 



BRACRIOPOBA. 

 Spirifera Kimberleyensis, sp. nov. Plate V. Fig. 11. tjj e 



The general outline of this species is transvei'sely oval, with com- is 

 pressed valves and rather a long hinge-line. The ventral valve has 

 a shallow median sinus occupied by three or four fine ribs, and 

 bounded by two strong folds, which are most prominent in the 

 umbonal region. About five more folds, made up of bundles of ribs, 

 occur on eaeh side of the last named, but they become almost obsolete 

 in the depressed area near the hinge-line, on each side of the beaks. 

 The beak is elevated, pointed, and but slightly incurved. The 

 hinge-area is moderately deep, parallel, and as long as the width of 

 the shell. The triangular fissure is tolerably large ; no pseudo- 

 deltidium is seen. The dorsal valve has a rather prominent median 

 fold made up of five or six obscure ribs, and on each there are four 

 or five less prominent folds, also made up of bundles of tine ribs, all 

 of which tend to become obsolete in the flattened area near the cardinal 

 angles. The whole of the surface of the shell is covered with very 

 fine but distinct lines radiating from the beaks, and covering alike 

 the folds and their interspaces ; these lines can scarcely be seen with- 

 out a lens. Fine concentric imbricating lamelke are also present. 



This species rather closely resembles Spirifer Amhiensis, Waagen 

 ("Salt-Range" Fossils, Pal. Ind. ser. xiii. vol. i. 1887, p. 515, pi. 

 xlviii. fig. 1). in the general character of its ornaments, especially in 

 the bundles of finer ribs composing the folds of the shell, but the 

 beaks in S. Amhiensis are more approximated than is the case in the 

 present species, and furthermore, the fine radiating lines met with in 

 the latter are absent in the former. S. Kimberleyensis is represented 

 by a single specimen only, and it is most probably a young individual. 

 Locality. — Gascoyne River. 



EXPLANATION OF PLATES. 

 PLATE IV. 

 Fig. 1. Salterella Hardmani ; la, longitudinal section, 1 b, transverse section, 



both enlarged. 



,, 2. Olenellust Forresti, glabella ; 2a, telson ? 25, thoracic segment. 



,, 3. Orthocercks, sp. 



,, 4. Lfpidodendron ; 4a, " Knorria condition " of same. 



,, 5. Stigmaria; surface of root showing areolae. 



,, 6, Qa. Rachis of ferns (?). 



,, 7, la. Ui/pn-ites-\\k.e leaf- fragments. 



,, 8, 8«. Basal extremities of the same (or bracts of cone ?). 



,, 9. Euomphalus ? ? 



,, 10, 10a. Pleurotomaria ? ? 



,, 11. Fragment of Crinoid stem. 



Gascoyne River district (and those of a similar horizon from the Irwin River in the 

 southern part of West Australia, and the Fitzroy River in the northern) is quite 

 confirmatory of Mr Hudlestou's views as to the age of the Australian Carboniferous, 

 viz. that it corresponds with the Lower, rather" than the Upper Carboniferous of 

 other countries. 



