71 
2. Oethis steiatula, Schlotheim. 
llijslerollthes, Liunaous, 1755, Museum Tessinianura, p. 90, pi. 5, fig. 2. 
Tcrebratlllites sfriatula, Schlotheim, 1813, In Leonhard’s Taschenbuch, VIII, pi. 1, fig. 0. 
A.{)'lipa ,, Sowerby, 1810, Trans. Geol. Soc. London, V (2), pi. 54, fig. 10. 
Or this resupimita, J. Phillips, 1841, Pal. Foss. Cornwall, p. 67, pi. 27, fig. 115. 
,, striatllla, L. G. de Koninck, 1842, Descr. Anim. Foss. Terr. Garb. Belg., p. 224, 
pi. 12 bis, fig. 6. 
„ ,, AVoodward, 1854, Man. Mollusca, pi. 229, fig. 147. 
T. Davidson, 1855, Mon. Brit. Foss. Brach. lutrod., I, pi. 7, fig. 128-135. 
G. Saudberger, 1855, Verstein. Eheiu. Schichtensyst. Nassau, p. 39, pi. 
34, fig. 4. 
,, ,, T. Davidson, 1865, Mon. Brit. Dev. Brach., p. 87, pi. 17, fig. 4-7. 
This species, so wide-spread in the upper and middle beds of the 
Devonian, has been so well described and figured by different Authors, 
particularly S. P. Woodward, G. Sandherger, and Mr. Davidson, that I think 
I may abstain from giving its characters here. I will confine myself to 
saying that the only specimen from Australia that has been sent to me has a 
size above the average, as it is four centimetres long and four and a half wide ; 
that it has lost a large portion of the shell, enabling one to see the mnscular 
and vascular impressions of the dorsal valve, which are quite similar to those 
that S. P. Woodward and Mr. Davidson have so well reproduced from a 
specimen collected in the Middle Devonian limestone of the Eifel, and 
presented by me to the British Museum ; there cannot he the least doubt as 
to the specific determination of this species. 
Horizon and Localities, — "Wherever the Devonian has been recorded 
the presence of Orthis striatula can he proved. It has been found in 
Belgium, Prance, England, Spain, Pmssia, the United States, and even in 
Persia. 
The Australian specimen was found by the Bev. W. [B.] Clarke in a 
piece of reddish sandstone on the hanks of the Allyn Biver.^ 
[The area drained by the Allyn Elver is now considered to be Carboniferous. — W.S.D.] 
