PRESHWATEU SHELLS OF ATJSTEALIA. 305 



Greuus Sphjertum. 



131. Sph^rium egregium, Gould. 



Cyclas egregia, Gould, Proc. Bost. Soc. Nat. Hist. 1850, vol. iii. p. 292; 

 id. Otia Conch, p. 86; Wilkes, Explor. Exped. p. 245, Atlas, figs. 526- 

 526 6; Prime, Append., Am. J. Conch, v. p. 153; Tenison-Woods, 

 Proc. Linn. Soc. N. S. iVales, 18/8, vol. ii. p. 255. 



ITab. Nev\- South Wales ? (Gould, 'Otia '). 



This is a very large species, being seveu eighths of au inch in 

 length ; and it is doubtfully Australian. 



132. Sphj^rium translucidum, Sowerhy. (Plate YII. fig. 32.) 

 Sphaerium translucidum, Sowerhy, Conch. Icon. fig. A6. 



Spliaerium novjE-zelandiae, part., Deshayes, Proc. Zool. Soc. 1854 ; id. 

 Cat. Corbiculidce Brit. Mus. p. 273. 



Ifab. Palm-tree Creek, Australia. 



The specimens which received the name translucidum were con- 

 sidered by Deshayes to belong to his S. novcB-zelandice \ and 

 hence it is that the locality New Holland is given in his ' Mono- 

 graph of Corbiculidse in the British Museum.' 



I must here state that the figure in Mr. Sowerby's mono- 

 graph is not only utterly useless, but altogether misleading. His 

 description of the form, with the exception of the dorsal margin, 

 which slopes on each side of the umbones, is fairly correct ; but 

 where is the acuminated anterior end in the figure ? The colour 

 is hyaline white, and the mixture of red and yellow observable in 

 the illustration has no existence in reality. 



133. Sph^rium QUEEisSLANDicuM, n. sp. (Plate VII. fig. 33.) 

 Shell hyaline white, rather inequilateral, somewhat inflated, 



obliquely subcircular, only a little wider than long; anterior end 

 longer, slightly acuminated ; posterior shorter, broader, obtusely 

 curved. Ventral margin much curved. Concentric striae very 

 minute. 



Length 3^ millim., width 4. 



Hal. Limestone Creek, Burdekin Eiver, Queensland {Brazier). 



More inequilateral than S. translucidum, longer, with more 

 prominent umbones, more circular, with the anterior end less 

 acuminate, and the posterior not so decidedly truncated. 



134. SpHiERiuM Macgillivrati, n. sp. (Plate VII. fig. 34.) 

 Shell nearly equilateral, not much inflated, transversely ovate, 



transparent wliite ; anteriorly a little narrower and more acumi- 



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