322 RECORDS OF THE AUSTRALIAN MUSEUM. 



crenulation of the lowei- margin of the auricle, and the concave 

 dorsal margin of the valve opposite to it (PI. Ixi., fig. 7) ; this 

 crenulation arises from a rugosity of the concentric laminse of the 

 sui'face at those particular points. 



On comparing the articulus of A. hughendenensis with that of 

 MaccoypJla we notice the absence of a chondrophoral button in 

 the rigiit valve, nor so far as I know, has the blunt tooth said to 

 exist in the right valve of Ancflla been seen in an Australian 

 specimen. 



Genus Modiola, Lamarck, 1799. 



(Mem. Soc. Hist. Nat. Paris, 1799, p. 89). 



Modiola dunlopen.sis, Eth.Jil. 



(Plate Ix., fig. 6). 



Modiola dnnlopensis, Eth. fil., Mem. Geol. Survey N. S. Wales, 

 Pal. 11, 1902, p. 2.3, pi. v., f. 4 and 5, pi. vi., f. 1 and 2, pi. 

 vii., f. 1. 



Ohs. — A single specimen is present, rather more than the 

 posterior third of the conjoined valves. It is the first occurrence 

 of the species in Queensland known to me. 



Gemis Trigonia, Brmiuiere, 1789. 



(Encycl. Method., i., 1789, pi. xiv.). 



Trigonia cinctuta, Eth. fil. 



(Plate Ix., fig. 9). 



Triqonia cinctuta, Eth. fil., Mem. Roy. Soc. 8. Australia, ii., pt. 1., 

 ' 1902, p. 28, pi. iv., f. 4-6, (?) 7. 



Obs. — Tliis is represented by an external impression of the 

 antero-posterior two thiixls of the united valves. The fluctuating 

 costi^j are well shown with large nodes along the margins of the 

 cinctures ; the latter aie broad. This is the first occasion on 

 which C cinctuta has been met with outside the Lower Cretaceous 

 of South Australia. 



Genus Grammatodon, Meek and Worthen, 1858. 



(Proc. Acad. Nat. Sci. Philad., 18.58, p. 419). 



Gkammatodon (?) daintreei, sp. nor. 



(Plate Ix., figs. 7 and 8). 



>Sp. Char. — ^^Shell longitudinally oblung, e(juivalve. Valves 

 tumid, particularly in the umbonal regions which are traversed 



