313 



Limea transenna, Tate. 



1886. Limca transenna, Tate, Traus. Eoy. Soc. South Aust. vol. viii. p. 119, 

 pi. is. tigs. Qa-b. 



Shell small, oblique, broad, ventricose ; radiating costtB minute, 

 numerous, the interstitial spaces with a median line, rendered 

 granose by the passage of the frequent, regular, elevated growth- 

 lines ; auricles small ; hinge-line narrow, frequently overhanging 

 and flanked on either side by four or five long ridges, which 

 occupy the position of lateral teeth. 



Dimensions. — Height 10 mm.; length 7 mm. 



Furm. and Loc. — Eocene : Victoria. 



L. 346. Right valve, larger than that indicated by the author 

 of the species, and slightly more tumid — a local variation ; from 

 Bairnsdale. Presented by W. H. Grigson, JEsq. 



L. 9839. Several examples of the adult ; from Muddy Creek. 



JPurchased. 



Family PECTINID^. 



Genus PECTEN, Miiller. 



[Zool. Dan. Prodr. 1776, pp. xsxi.-248.] 



Chlamys, auct. (See below.) 



Shell suborbicular, auriculate, ornamented by radiating costae ; 

 right valve typically convex, inflated and produced in the umbonal 

 region, which curves inwards ; left valve typically flat and smaller 

 than the other, but in certain sections of the genus it is subequal 

 and convex ; cardinal liue straight ; ligamental pit commonly 

 triangular, internal. 



This genus has been divided into a number of sections, the 

 largest of which, Chlaixys, included by authors as a separate genus, 

 certainly possesses some title to distinction, though the difi'erences 

 consist, principally, in its having the wing-like expansions of 

 unequal size, and especially in that both the valves are convex. 

 But the name is inadmissible: it was first proposed by Polten 

 in his Catalogue of the " Museum BoUenianum," 1798, which work 

 is not accepted by British malacologists, following the accepted 

 rules of nomenclature. Before Bolten's name was adopted the term 



