RECORDS OF W.A. MUSEUM. 
[75 
PERMO-CARBONIFEROUS FOSSILS 
FROM BYRO STATION, MURCHISON DISTRICT. 
By L GLAUERT, E.G S. 
A number of fossils of Permo-Carboniferous age, obtained in 
the course of sinking a bore at Byro Station, on the Byro plains 
south of the Carrandibby Range in the Murchison, were presented 
to the Museum by Mr. L. Landauer of Day Dawn. 
The majority of the fossils have the shell preserved, but others 
appear as more or less glossy internal or external casts; they 
include Spififer convolutus (Phillips), 5 . musaJtheyleHsis v. australis 
(Foord), Chonetes pratti (Davidson), Deltopecten subquinquelineatus 
(McCoy), and Aviculopecten sprenii (Johnston), Two new forms 
have been recognised; the Spirifer is represented by a number of 
specimens which render a diagnosis possible, but the Conularia is 
imperfect and fragmentary. 
BRACHIOPODA. 
Genus Spirifer. 
Spin fee byroeusis, sp. nov, 
Spirifer lata (?) .. Eth. til Geol Surv. W .A., Bulletin lo, p. 15, plate i., 
fig « (1903)- 
SPIRIFER BYROFNSIS. 
This species is represented by specimens more or less spindle- 
shaped, with sub-acute alar angles, beaks not prominent, rising but 
little above the cardinal edge, slightly incurved. Hinge line 
straight, cardinal area moderately wide, concave, transversely 
striated, as wide as the shell. Ribs radiating, numerous — about 40 
on each valve — usually grouped in bundles of three, grouping 
becomes indistinct towards the wings — where the ribs are irregular 
and gradually fade away, — alar extremities curved, smooth wing- 
like. Lines of growth distinct towards the margin. Sinus and 
fold ribbed. Sinus of the ventral valve extends to the apex of the 
beak. 
