142 PROCEEDINGS OF TUE MALACOLOGICAL SOCIETY. 



13. Mactiu decoha, Deshayes. B.M. 



Madra decora, Deshayes, Proc. Zool. See, 1854, p. 63; Weinkauff, 



p. 39, pi. xii, figs. 8, 9; Reeve, fig. 80. 

 M. pulchra, Gray, Mag. Nat. Hist., vol. i, p. 372, 1837, name 



only; Keeve, sp. 60, fig. 63, 1854; Weinkauff, p. 56, pi. xix, 



figs. 5, 6. 

 31. jiclcelii, Weinkauff, p. 54, pi. xix, figs. 1, 2. 



Ifab. — New South Wales (Weinkauff for decora), ? (Deshayes), 

 lied Sea (Reeve for pulehra), also Weinkauff, Banda Island, Aden 

 and Muscat (Brit. Mus.), lied Sea (Weinkauff iov jickelii). 



This common species is included in the Australian list merely on 

 the authority of Weinkauff. I fail to discover any distinguishing 

 features of importance between M. pulehra and the present species. 

 The former may be a trifle more rostrate behind, like olorina, Phil., 

 in that respect. 



14. Mactra decussata, Menke. 



Mactra decussata, Menke, Moll. Novse Hollandise, 1843, p. 46. 



Hah. — West Australia (Menke). 



This species is not referred to by Beeve, AVeinkauff, or Conrad in 

 their monographs. It was not figured by Menke, and from his brief 

 Latin diagnosis I am unable to recognize it among the species since 

 described. 



15. Mactra dissimilis, Deshayes. B.M. 



Mactra dissimilis, Desliayes, Proc. Zool. Soc, 1854, p. 63 ; Beeve, 

 pi. xiii, fig. 59; Weinkauff, p. 113. 



Sab. — Australia (Deshayes and Beeve), Cape York (J. B. Jukes 



in Brit. Mus.), Inkernian, near Towusville, North Queensland 



(W. Stalker in Brit. Mus.), Queensland (Hedley), Port Curtis 

 (Brit. Mus.) 



16. ^Mactra eximia, Deshayes. B.M. 



Mactra eximia, Deshayes, Proc. Zool. Soc, 1853, p. 16; Beeve, 

 pi. viii, fig. 31 ; Weinkauff, p. 99, pi. xxxiii, fig. 6 (copied 

 from lleeve). 



Hah. — Moreton Bay (Deshayes), Port Curtis, Port Denison, and 

 north-east coast of Australia (Brit. Mus.), Queensland (Hedley). 



This may be the shell quoted by Menke (Moll. Novae Hollandiae, 

 p. 45) as M. hekacea, Chemnitz, a European species. 



17. Mactra (Mactrinula) explanata, Deshayes. B.M. 



Mactra explanata, Deshayes, Proc. Zool. Soc, 1854, p. 66; Reeve, 

 pi. xiv, fig. 70 ; Weinkauff, p. 90, pi. xxxi, fig. 1 (copied from 

 Reeve). 



Hab. — Swan River (Deshayes and Reeve). 



