Permian Productinae and Strophalosiinae of W.A. 
2d 
<tuincimx. The striae increase in number by division of primaries. Con- 
•centric wrinkles are present on the ears but these rarely extend onto the body 
'Of the shell. A row of large erect spines is found along the cardinal margin. 
Comparison with other species. — Only pedicle valves are known of this 
variety. These, however, are such a distinctive shape that it has been thought 
best to distinguish them temporarily as a variety of Linoproductus can- 
■criniformis (Tschern.). The ornamentation of the variety is similar to that 
■of Tschernschew^s species with the same fine radial striae and elongated 
pustules. They differ in the much less convex pedicle valve and in the semi- 
circular outline with the greatest width at the hinge-line. 
The variety shows also a marked resemblance to Productus asperidiis 
Waagen (1884 p. 693 pi. Ixxix. figs. 3-6) in outline and type of ornamenta- 
tion. The spines in that species are erect and not elongated pustules seen in 
Linoproductus cancriniform'.s. 
Productus koninchianns de Vern. (Chao 1928, p. 63 pi. v, figs., 4-7) has 
also some features in common with these shells. It has, how^ever, a much 
more inflated pedicle valve though several figures of smaller specimens 
(Chao 1928, pi. v. fig. 6) have a fiat pedicle valve. The Western Australian 
;specimens are always larger than these smaller shells and never have an 
inflated and incurved umbo. Productus tumidus Waagen (183-1, p. 708, 
pi. Ixxx. figs. 1-3) is also an inflated form and bears erect spines. 
WAAGENOCONCHA Chao. 
1027. — Chao, Y. T. Palaeoirtt. sinlca, S?r. B., V, fasc. 2, p. 8o. 
Diagnosis. — Thin-shelled productids with convex sinuate pedicle valve, 
brachial valve flat or concave. Surface marked by quincuncially arranged 
tubercular spines in the young and adult stages, becoming smaller and more 
-closely packed together in old age. 
Gonctype. — Productus humholdti d’Orbigny, 1842, Voy. Amer. Merid., Vol. 
3, Pt. 4, p. 54, figs. 4-7. 
Waagenoconcha imperfecta Prendergast. 
PI. iii, figs. 7-9. 
1924 . — ‘‘Productus suhquadraUis^ ’ Morris, Chapman, p. 36. 
1934 . — Waagenoconcha imperfecta Prendergast, p. 15, pi. iv, figs. 1-3. 
Holotype. — U.W.A. 3044, Luiluigui Station, Kimberley Division. Liverynga 
Series. 
Allotypes. — U.W.A. 2768, 2775, same locality and horizon. 
Topc-t-ypes. — U.W.A. A 444, Lniluigni HomciLttet d, Kimberley Division. 
Liverynga Series. 
Other Materifd, — U.W.A. 20457, Limestone at base of Mt. Hardman, Kim- 
l)erley Division. Liverynga Series. 
U.W.A. 20454, north flank of Mt. Cedric, Kimberley Division. Liverynga 
iSeries. 
-Shell transversely oval in outline, hinge-line less than greatest 
width of shell. Ornamentation on both ^alves of coarsely spaced quincun- 
cfally arranged spine bases with fine forward projecting spines. Shell with 
well marked growth lines. 
Pedicle valve evenly convex, sinuate, umbo prominent, produced beyond 
hinge-line. 
Brachial valve fiat to slightly concave vdth a shallow median fold. 
Alargins not geniculate. 
