532 PALEONTOLOGY OF QUEENSLAND, 



mentioned C. bellistriatus is a remai'kably variable shell, there is 

 no figure of Hall's showing so short an individual as C. rectanffii- 

 laris, mihi. A comparison with Phillips' Cypricardia rhombea* 

 possibly referable to the present genus, at once dispels any relation 

 between the two forms, especially the length of the British^shell 

 from anterior to posterior. 



In outline C. reclangularis is not unlike Cypricardella rhombo- 

 idea, mihi,t but in the former the antero-posterior angle is much 

 more rectangular, and it possesses a strong diagonal ridge, absent 

 in the latter. 



Loc. and Horizon. — -Rockhampton District (C. W. de Vis, 

 Colin, de Vis). Gympie Series. 



Oriler-MYACEA. 



Family— ANATINID^. 



Genus — C h ^e n o m y a, F. B. Meek, 1866. 



(Pal. Up. Missouri, p. 42.) 



Ch^enomya'? Etheridgei, De Kouinck. 



(PL XL. fig. 5.) 



Sangainolltes Etheridgei, De Koninck, Foss. Pal. ISTouv. Galles du 

 Sud, 1877, Pt. 3, p. 262, t. 17, f. 2 ( ^ t. 16, f. 2). 



Ohcenomga? Etheridgei, Eth. fil, Geol. & Pal. Q'land and N. 

 Guinea, 1892, p. 279. 

 Obs. — Under the first of the above names De Koninck figured 

 two bivalves, which, it appears to me, must with our present 

 knowledge be kept distinct. If of the same species, they can only 

 be regarded as oppositely extreme members of it. The specimen 

 formerl}'- described by me did not exhibit the cincture, or sulcus 

 proceeding from the umbo to the ventral margin in each valve, 

 but this is visible in the present example. The latter coincides 



* 111. Geol. Yorkshire, 1836, Pt. 2, t. .5, f. 10. 

 tGeol. Pal. Q'land, &c., 1892, t. 14, f. 15. 



