354 



Trigonia tubulifera, Tate. 



1885. Trigonia tubulifera, Tate, Southern Science Record, January, p. 3. 



1886. Trigonia tubulifera, Tate, Trans. Roy. Soc. South Aust. vol. viii. 



p. 145, pi. xi. figs. 13rt-J. 

 1893. Trigonia tubulifera, Tate and Dennant, id. vol. xvii. pt. 1, p. 224. 

 1895. Trigonia tubulifera, Tate and Dennant, id. vol xix. pt. 1, p. 113. 



Shell veiy small ; flat posterior area having sixteen radial 

 costsB, remainder of surface with about twenty concentric ridges, 

 the whole of the costse and ridges carrying numerous, equidistant, 

 short tubular projections. 



Dimensions. — Height 6 mm. ; length 6 mm. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



L. 9848. Examples of both valves. Purchased. 



Trigonia how^itti, M'Coy. 



1876. Trigonia hoivitti, M'Coy, Prod. Pal. Vict. dec. iii. p. 31, pi. xxvii., 



figs. 1-2;;. 

 1878. Trigonia hoivitti, R. Etheridge, jun.. Cat. Aust. Foss. p. 158. 

 1886. Trigonia hoivitti, Tate, Trans. Roy. Soc. South Aust. vol. viii. p. 146.! 



Shell solid, transverse, posterior margin sloping ; ornamented 

 by about twenty granulated radial ribs, the largest being in the 

 middle, the others decreasing in size as the posterior and anterior 

 margins are approached, the granulations are largest on the 

 anterior costse ; ventral margin undulating, broadly crenulated in 

 the interior. It will be noticed that transverse ribs or ridges are 

 absent in this species, the costse all being radial. 



Dimensions. — Height 44 mm. ; length 50 mm. 



Form, and Loc. — Miocene : Victoria. 



L. 4839. Examples of both valves ; from Muddy Creek. 



Presented hy John Dennant, Esq. 



L. 5648. Fragment of right valve ; from Jemmy's Point, Lake 

 Tyers, Gippsland. Presented hy the Rev. J. S. H. Royce. 



L. 6600. Both valves of the adult ; from Muddy Creek. 



Purchased. 



L. 9849. Two specimens; from Muddy Creek. Purchased. 



