244 
about the umbonal region, with a prominent and elevated, but rounded fold, rendering 
the shell more or less trilobed. Front margin sinuated, much elevated medianly and 
depressed laterally. Foramen small, and contiguous to the dorsal valve. Surface very 
plainly concentrically lined, and rather strongly radiately striated (? spne bases). 
Ols. This species appears to be nearly related to Atliyris subtilita, Hall,* which 
is described as possessing “ faint, often almost imperceptible, radiating striie.” In the 
present species the striis, if they be so, and not spine bases, are much too coarse o 
come within this definition. It certainly agrees better with the American shell than it 
does with the form described by Dr. Abich as Atliyris {Spirigera) protea, var. subtihta. 
Hall, from the Carboniferous rocks of Armenia-t Athyris globularis, Phill., is another 
shell with which the present may be compared in a general way. 
Loc. and Rorizon. Hawkins’ Gully, Kariboe Creek, Kroombit Diggings, Port 
Curtis (IF. H. GympieBeds. 
Family— EHYNCHONELLID^F. 
Genus— BRTNGRONELLA, Fiscler, 1809. 
(Notice Foss. Gouv. Moscoh, p. 35.) 
EHTNCHONEiiLA PtEUEODOK, Phillips, sp., PI. 11, fig. 23. 
Terchratulapleurodon, Phill., 111. Geol. Yorksh., 1836, Pt. 2 p. 222 t 12, f. 2S-30 (r^n 10) 
Bhynchonella plmrodon, Davidson, Mon. Brit. Garb. Braoh., 1800, Pt. 3, pp. 101 and 246, t. 23, f. 1-1 , 
16-22 ?. 
De Koninck, Foss. Pal. Nouv.-Galles du Sud, 1877, Pt. 3, p. 219, t. 9, f. 4-4c. 
Obs. A number of decorticated impressions, resembling Bhynchonella pleurodon, 
occur on the surfaces of blocks from Stanwell, associated with Qhonetes, Productus, and 
other shells. It is the variety with three or four ribs in the sulcus, and the fold muc 
produced forward. In the dorsal valve the flanks each carry four ribs. 
Loo. and Rorizon. Stony Creek, Stanwell, near Eockhampton {The late 
James Smith )— Beds ; Gully rising in cliff bettveen two peaks of a mountain, on 
left bank of Keelbottom Eiver, north of Old Plum-tree Inn {B. L. Jac*)— Star Beds. 
Ehtnchonelea, sp. ind. 
Obs. A single small shell, ovately trigonal in shape, with a small sharp beak, 
smaU convexity of valves, and the dorsal valve bearing twelve angular ribs, simple and 
without imbricating strim. It is not unlike a Betzia, but the shell substance is 
impunctate. It might pass for a small variety of Bhynchonella pleurodon, but t 
dorsal valve is rather too flattened in the middle line. 
Loc. and Rorizon. Township, Cania Diggings, Burnett {W. R. Bands)" 
Gympie Beds. 
Family— OETHIDiE. 
Genus — OBTRIS, Ralman, 1828. 
(Kongl. Vet. Acad. Handlmgar, 1827 [1828], p. 96.) 
Oethis eesupinata, Martin, sp., PI. 11, figs. 26 and 28. 
OHMsrempinata (Martin), Davidson, Mon. Brit. Garb. Bracb., 1861, Pt. 4, p, 130, t. 29, f. 1-6, t. 0, f. 1-5- 
Obs. Internal casts of this cosmopolitan species, in a good state of preservation^ 
are to be found in the Star Eiver Beds, of all sizes up to one and a-half mches 
breadth They resemble the small forms figured by Mr. Davidson from Millicent^ 
* Stanbury’s Exped. Valley Gt. Salt Lake of Utah, 1852, App. E, p. 409. 
t Geol. Forschiingen in den Kaukaaischen Liindern, 1878, t. 8, f. 10-12. 
