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Gympie gold-bearing beds. Tbe latter differs in no respect from the well-known forms 
described by Wahlenberg, Sowerby, Phillips, De Koninck, and Etheridge. 
The later collections of my Colleague contain a few examples of this variety 
exhibiting its character in a more satisfactory manner than those obtained by the late 
Mr. Daintree, as, for instance, one specimen in which the vertical smooth front of the 
shell is visible. A single individual was likewise obtained from the Great Star Beds — a 
small dorsal valve exhibiting the characteristic transversely corrugated surface. Some 
very interesting examples of this protean species are in the Queensland Museum, both 
internal casts and examples retaining a large proportion of shelly matter, with the 
corrugations on the visceral surface, general fine striaj, and bold vertical front fully 
preserved. One cast of the interior exhibits, not only the muscular impressions, but 
also the vascular system. 
Loc. and Horizon. Lady Mary Keef, Gympie {The late B. Bainfree)-, Gympie 
{B. L. Jade) ; Boekhampton District * (<7. W. Be Vis ; Colin. De Vis) — Gympie Beds ; 
Corner Creek, Great Star River {B. B. Jack) — Star Beds. 
Genus — BBBBTIA, Waagen, 1884. 
(Pal. Iiidioa. (Salt Range Fossils), Ser. xiii., Vol. iv., fas. 3, p. 591.) 
Debbyia senilis, Phillips, sp., PI. 12, figs. 1-6. 
Spirifer senilis, Phill., 111. Geol. Yorkah., 1836, ii., p. 216, t. 9, f. 5. 
Streptorhynchv.s crenistHa, var. senilis, IJavidson, Mon. Brit. C.arb. Brack., 1861, Pt. 4, t. 27, f. 2-7. 
Lepteena senilis, McCoy, Brit. Pal. Foss., 1853, fas. 3, p. 45a. 
Ortliotetes orenistria, var. senilis, Etheridge ill., Proc. R. Phys. Soc. Edinb., 1880, v., p. 282, t. 8, 
f. 12-15. 
Derhyia senilis, Waagen, loc. cit., p. .593. 
Ohs. Accepting Dr. "W. Waagon’s separation of the genera Streptorhynchus 
and Orthotetes, and the redistribution of species between them and his new genus 
Berlyia, it is at once apparent that the Australian shell I have described as 0. 
orenistria, var. senilis, will fall into the last-named, and regain its specific position as 
originally described by Phillips. It appears to me to have a much greater affinity 
with the British shells than with any of those described from the Carboniferous Beds of 
the Indian Salt Range Series by Dr. Waagen. 
The Queensland specimens have, in common with British examples, the semi-conic 
ventral valve, with step-like interruptions “ produced by two or three very large and 
irregular concentric undulations,” the elevated, but not incurved beak, and the wide 
area with its convex deltidium. Similarly, the dorsal valve exhibits the straight hinge- 
line, evenly convex surface, and much less marked undulations. The striation of the 
valve likewise appears to be identical, and there are also the same concentric laminations 
of the area and deltidium as seen in some British examples. Dr. Waagen, in defining 
Berhyia, says nothing about the punctate nature of the shell, but in the present 
examples the shelly matter is decidedly and distinctly punctate, and when the surface 
is at all worn the punctfe arc everywhere visible, and more es]3ecially on the area. I 
believe the punctate structure of the shell in Orthotetes and Streptorhynchus has not 
been generally recognised, for in the generic descriptions given by all the best authors 
the shell is said to bo impunctate. However, that most accurate observer, Professor 'VV'. 
King, has not omitted to notice this peculiarity in the Permian species Streptorhynchus 
pelargonatus, Schlotheim.f Mr. Davidson has also seen the same structure in some 
British Orthotetes. 
* See note, p. 199. 
t Mon. Permian Foss. England, 1858, p. 109. 
