99 



The disposition of the columellar plications and the strongly 

 costate whorls are highly characteristic. 

 Type. — Valuta nucleus^ Lamarck. 



Lyria harpularia, Tate. 



1888. Lynn, harpularia, Tate, Trans. Roy. Soc. South Aust. vol. x. p. 176, 



pi. xii. fig. 12. 



1889. Lyria harpularia, Tate, id. vol. xi. p. 118. 



The protoconch of this species (Plate IV. Tigs. %a-V) is 

 practically identical with that of Lyria harpula, Lamarck, of the 

 Eocene of Europe. The shell as a whole, however, is larger, 

 more volutiform, and the transverse costse are more numerous. 

 The latter terminate posteriorly in obtuse points leading to a 

 flattening in the vicinity of the suture ; spiral lines prominent 

 on the body-whorl anteriorly. The outer margin of the aperture 

 is not very thick ; whilst the columellar border is furnished 

 towards the anterior canal with two plications more prominent 

 than the remainder, which become very minute as they gradually 

 disappear within the aperture posteriorly. 



Bimemions. — Length 42 mm.; breadth 19 mm.; length of 

 aperture 22-5 mm. 



Form, and Loc. — Eocene : Victoria. 



70426. An example of the adult ; from Meribee Plains. 

 6. 4174. A series illustrating stages of growth ; from ^uddy 

 Creek. Presented hy John Bmnant, Esq. 



G. 9359. A similar series ; from Muddy Creek. Purchased. 



Genus VOLUTA, Linnaeus {em. Lamarck). 



[Linn. Syst. ^'at. ed. 10, 1758, p. 729; ed. 12, 1767, p. 1186; Lamarck, 

 Mem. Soc. Hist. Nat. Paris, 1799, p. 70.] 



Shell solid, broad, longitudinally plicate, the plications being 

 elevated into obtuse tubercles on the periphery of the whorls ; 

 spire short ; protoconch elevated, turbinate, smooth ; aperture 

 narrow, canaliculate behind and broad in front ; inner mar"uu 

 often covered by thin callus ; columella carrying many plaits, 

 four or five being prominent, the remainder much smaller. 



Type. — Voluta musica, Linnteus. 



