570 
Um'bones large, incurved, slightly anterior. Cardinal teeth large, apparently one in 
each valve; the dorsal margin thickened iutornally on the posterior side, and assuming 
a rather lateral, tooth-like appearance. Adductor muscular scars well developed, 
especially the posterior, which is deeply excavated on the outer side. Surface with wide 
concentric laminae, and intermediate finer lines of growth. 
Ohs. The reference to Unicardium is made pirovisionally, as the casts of this 
shell liave long puzzled me, as did those in Daintree’s Collection perplex Mr. Etheridge. 
It always occurs as internal casts and from the one locality, the almost equilateral form 
and central beaks being among its chief peculiarities. 
The pallial line is simple, although in our illustration (PI. 27, fig. 1) it appears 
sinuated, but this only arises from a fracture, all other specimens having presented a 
perfectly continuous line. 
Named in honour of my Eathcr, Mr. Eobert Etheridge, E.R.S. 
Loo. and Horizon. Corporation Quarry, Maryborough (T/je late B. Baintree, 
and B. L. Jack ; O. Sweet — Colin. Sweet, Melbourne). 
Older— TELLINACEA. 
Eamily— TELLINIDJi. 
Genus — PALJEOMCEBA, Stoliezka, 1870. 
(Pal. Indica (Otet. Fauna), 1870, ill., Fasc., 1-4, ii.llG.) 
PAL-noMOJBA iiAniJBBUUiEifsis, Etheridge, sp. 
TelUna Markehuriensis, Etheridge, Quart. .Tourn. Geol. Sac., 1872, .'cxviii., p. 341, t. 20, f. 6 and 6a. 
Char. Shell compressed, transversely elongated, nearly equilateral, acutely 
rounded anteriorly; posterior margin slightly truircated ; lines of grow'th strongly 
marked and band-like ; these concentric bands are broad and of equal width. 
{Etheridge.') 
Ohs. In many respects this shell resembles Tellina (Palceomoera) inconspicua, 
Eorbes, from Triehinopoly ; but the band-like markings, if in the external shell, which 
they appear to be, remove it from that species ; in form, size, and habit, however, it 
closely approaches the latter. {Etheridge.') 
The distant concentric depressions appear to be a very characteristic feature m 
this species. 
Loo. Maryborough {The late B. Baintree ; G. Sweet — Colin. Sweet, Melbourne). 
PALyUOMffiKA ? Sp, iud., PI. 26, fig. 17. 
Tellina sp., Etheridge, Quart. Journ. Geol. Soc., 1872, sxviii,, p. 341, t. 20, f. 7. 
Ohs. This species is less elongated and more deltoid in form thanP. maricehuriensis, 
and apparently possessed a smooth shell instead of the banded structure of that 
species ; the anterior side is obtusely rounded, and the posterior more acute. 
{Etheridge.) 
A small form resemhling this occurs in the Walsh Eiver nodules, but the 
specimens appear to have an inflection in the posterior ventral margin. 
Loc. Maryborough {The late B. Baintree). 
Genus — G LYCIMEBIS (Klein), Lamarck, 1799. 
Olydmeris (Kleiu), Lamarck, Mem. Stic. Hist. Nat. Paris, 1799, p. 83 [non Lamarck, 1801, Syst. Aii'M' 
sans. Verbeb., p. VZ^^Gyrtodarin, H.audin]. 
Panopea, Mdnard de la Groyc, Ann. Mus. Hist. Nat. Paris, 1807, ix., p. 135 
Ohs. Glyoimeris is here used as originally proposed by Kleiu, and adopted in 
his earlier writings by Lamarck, tvho was a binomial Author. As employed by the 
