274 
Order— AECACEA. 
Family— ATICID^. 
Qenus— FAB ALLBLOB ON, Meeh and Worthen, 1866 * * * § 
(Proc. Chicago Acad., i., p. 17.) 
PABALLELODOlf COSTELLATA, AleCoxj, PI. 40, figs. 12 and 13. 
Bi/ssoarca costeJlata, McCoy, Synnp. Carb. Lime. Foss. Ireland, 1844, p. 72, t. 11, f. 36. 
Palcsarca costeJlata, Ue Koninok, Foss. Pal. Nouv.-Ralles dn Sud, 1877, Pt. 3, p. 280, t. 16, f. 6 and 7. 
Sp. Ohnr. Sliell small, subrhomboidal, rather square-ended, valves fairly convex, 
about twice as long as wide. Anterior end short, rather alate, the margin rounded, 
joining the hinge-lino at a sharp angle ; posterior end produced and compressed, the 
margin obliquely truncated, and rather emarginate. Dorsal margin straight, as long as 
the shell; ventral margin rounded, with a slight concavity a little anterior to the middle. 
Diagonal ridge pronounced but not acute, posterior slope rather concave, a sinus 
traversing the valves obliquely from the umbones to the concavity in the ventral 
margin. Posterior teeth thi’ee, long and rather oblique. Surface with concentric 
ridges at irregular intervals, close or distant, crossed by innumerable, fine, almost 
microscopic, radiating strife, somewhat broken or fluctuating. 
Obs. I am unable to compare this shell with McCoy’s figure, and have to 
accept De Koninck’s determination, but the above description will serve to show the 
trivial differences which exist between the present shell and the latter’s description. 
These are the presence of the large number of radiating striae, and three instead of 
two posterior teeth. In addition to these points the Queensland shell is much larger. 
Possibly it is a distinct species, and in that case may be known as Parallelodon 
Koninchi. 
Loc. and Horizon. Rockhampton District t {G. W. Be Vis; Colin. De Vis) — 
Grympie Beds. 
Family — NU CULID^. 
Genus — NUCULA, Lamarek, 1799. 
(Prodrome, p. 87.) 
Ntictjla, sp. ind., PL 40, fig. 10. 
Obs. A cast of a small oblong-deltoid shell, with a short posterior hinge, and a 
very abrupt, almost vertical, anterior margin. The anterior end is much reduced in size, 
and the beaks quite terminal ; the posterior end is curved and produced. There are 
impressions of six hinge teeth, and traces of fine concentric strife. 
This fragment is so far satisfactory, that it demonstrates the presence of the 
genus in the Queensland beds. It properly belongs to the group of Nucula tumida, 
Phill.J The cartilage pit has not been satisfactorily seen. 
Loc. and Horizon. Rockhampton District § (C. W. Be Vis ; Colin. De Vis) ’ 
Gympie Beds. 
*Macrodon, Lycett, 1846, non J. Muller, 1842, 
+ See note, p. 11)9. , 
J Not to be confounded with N. tumida, Ten. Woods, a South Australian Tertiary Shell, whio 
requires renaming. 
§ See note, p. 199, 
