NdTKS UN TIIK MAKINK Mdf.M'SCA 

 (irKKNSLANh. 



Part III 



By JOHN SHIRLEY, D Sc, F.M.S. 



(Read hcf'trc the Bo>/(tJ Sorir^ff/ of Queensland, June 2iHhf 



IU14.) 



Since jniblishiiig my last list of additions to the Queens- 

 land Marine MoUusca, a nunil)er of additional species have 

 been reported, and there have been some changes in 

 nomenclature to which attention should l)e drawn. 



Class PELECYPODA. 



Family AKC1J).+:. 



(jenus ARC A, Linnceus. 



Arca irscA. Bruguihe, No. 25, Medley's list. 



,9. Arra jiisfachia, Lamarck. Hanley. Recent Shells,, 

 p. ir)4. remarks " Smaller, but scarcely differing 

 from A. fusca." From Murray Island specimens 

 of Area fusca have been leceived, some marked 

 with a white ray from the umbo for some distance 

 down the aiiterior slope, and with granulated ribs 

 and delicate transverse striae : others without 

 the ray and with decussated striae : and others 

 a<:ain intermediate between the two forms. 



