Mr Ethcridgc on Fossils from Bowen River Coalfield. 297 



CLASS PELECYPODA. 



Genus Aviculopecten — M'Coy, 1851. 



(Annals Nat. Hist., 1851, vi., p. 171.) 



Avicidopecteii suhquinquelineatus — M'Coy. — PL XV., fig. 52. 



Peden complies, Dana (non M'Coy), American Jour. Sc, 1847, iv., p. 160. 

 ,, subquinqudineatus, M'Coy, Annals Nat. Hist., November 1847, xx., 



p. 298, t. 17, f. 1. 

 ,, comptus, Dana, Gaol. U.S. Explor. Exped., p. 704, Atlas, t. 9, f. 5. 

 ,, subqinnquelineatus, M'Coy, Proc. Roy. Soc. V. D. Land, 1851, 1., 

 p. .322, t. 17, f. 1. 

 Aviculopecten ,, De Koninck, Foss. Pal. Nouv-Galles du Slid., 



1877, pt. 3, p. 295, t. 22, f. 2. 

 ,, ,, Etheridge, jun., Cat. Australian Foss., 1878, p. 6G, 



Ohs. — This is a large, strong, and distinctly marked species, 

 at first sight resembling A. Fittoni (Morris),* but easily dis- 

 tinguishable from it by the plain and unsubdivided condition 

 of the radiating costae, whereas in A. Fittoni the latter are com- 

 posed of a series of smaller radii. In both species the con- 

 cavities between the ribs are filled with subordinate costse. In 

 Morris's species there is only one between each pair of ribs, 

 but in McCoy's there are from three to five. In A. suhquiii- 

 quelineatus the ears are large and radiately striated, and tlie 

 whole shell must have grown to some considerable size. It 

 appears Professor Dana's name of F. comptus has precedence 

 of M' Coy's by a short time, and would be the accepted one 

 for this species, were it not that the name comptus had 

 already been used by Professor M'Coy -f for an Irish carboni- 

 ferous limestone shell. Professor Dana's name has therefore 

 to give way to the subsequently described P. sid)quinque- 

 lineatus. 



Loc. and Horizon. — Bowmen Eiver, at No. 25 Traverse Station, 

 in a hard flinty micaceous sandstone of the Marine Series. 



Collector.— 'R. L. Jack, Esq., E.G.S. 



* Strzelecki's " Phys. Descrip. N. S. Wales," t. 14, f. 2. 

 t Synop. Carb. Limestone Foss. Ireland, 1844, p. 90, t. 15, f. 14. 

 VOL. V. U 



