544 H. B. Newton — Chonetes Pratti in W. Australia. 



strongly inclined to think that a mistake was made when he attached 

 this locality to his specimen, more especially as on reference to our 

 Eussian Brachiopoda there is no form with which to compare it 

 either structurall}^ or lithologically, nor have I succeeded in tracing 

 anything in literature with which to gain any knowledge as to its 

 probable locality. There is every reason to believe that this supposed 

 Eussian valve came also from Australia, and most probably, as 

 suggested to me by Dr. H. Woodward, F.E.S., was sent to Prof. 

 Morris as a part of the " Strzelecki " collection, the fossils of which 

 he described in 1845.' 



The foregoing remarks may therefore lead to the following 

 conclusions : — (1) That the valves discovered by Mr. H. P. Woodward 

 can be referred, witbout a doubt, to Clionetea Pratti of Davidson. 

 (2) That the Davidson type, hitherto luilocalized, was most likely- 

 obtained from Australia. (3) That the valve labelled "Eussia" 

 came, in all probability, from the same country. 



In conclusion, it may be of interest to quote the other Cai'boni- 

 ferous fossils identified by Messrs. Foord ^ and Hinde^ from this 

 same portion of Western Australia, viz. the Irwin Eiver District, 

 which has now produced the Chonetes Pratti of Davidson. These 

 species are as follows : — 



Proditctus tenuistriatus, Verneuil ; P. undatiis, Defrance ; P. snh- 

 quadratus, Morris ; Spirifera Mnsahheijlensis, Davidson, var. Australis, 

 A. H. Foord ; Syringothyris exsuperans, Koninck ; Retindaria lineata, 

 Martin, sp. ; R. erebristria, Morris, sp. ; Orthotetes crenistria, 

 Phillips, sp. ; Pachydomus carinatiis, Morris ; Bellerophon deciittsatns ? 

 Fleming ; Orthoceras, sp. ; Discites, sp. : Pleurophyllum Australe, 

 Hiude ; P. sulcatum, Hinde. 



EXPLANATION OF PLATE XIV. 



Figs. 1-5. — Reproduction of the original figures of Chonetes Pratti, taken from 

 the "Geologist," of 1859, pi. iv. figs. 9-12. 1, 2.— Ventral and 

 dorsal view of specimen. Nat. size. 3. — Enlarged portion of valves, 

 showing pseudo-deltidum and (J) cardinal process. 4. — Interior of 

 ventrarvalve, enlarged, showing (A) the occlusor or adductor and (R) 

 the divaricator or cardinal muscular impressions. The cardinal spines 

 and orifices are also seen. 5. — Interior of dorsal valve, enlarged, 

 showing (J) the cardinal process ; (A, A') anterior and posterior 

 occlusor muscular impressions ; (0) ovarian spaces ? ; (X) the reniform 

 impressions. The dotted surface represents the granular ornamen- 

 tation. 



^^ 6-10. — The three valves collected by Mr. H. P. "Woodward in "Western 

 Australia, natural size. 6, 7, interior and exterior of ventral valve. 

 6a, magnified portion of fig. 6, showing orifices on the ribs between 

 which are the minute perforations. 8, 9, 10, interior and exterior of 

 dorsal valves. 8a, magnified portion of fig. 8 showing the arrange- 

 ment and perforated condition of the spinous asperities. 



,, 11, 12. — Interior and exterior of d(n-sal valve of the specimen said to come 

 from Russia, but which in all probability was originally part of the 

 " Strzelecki" Collection from Australia. 



[All the six specimens figured are in the British Museum (Natural History) 

 Cromwell Road, South Kensington.] 



1 Physical Description of New South "Wales and Van Dieman's Land, by P. 

 E. de Strzelecki. ^ Geol. Mag. 1890, PL VII. p. 151-155. 



3 Geol. Mag. 1890, PI. VIIIa. p. 196. 



