THE FRESHWATER MOLLUSCA OF VICTORIA 
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1868 U. angasi Sowerby. Reeve, Conch. Icon., p. 55, fig. 282. 
1882 U. angasi Reeve. Tate, Tr. Roy. Soc. S. Aust., v, p. 56. 
1882 U. Angasi Lea. Smith, Jour. Linn. Soc. Lond., Zool., xvi, p. 307 . 
1888 U. angasi Shy. Tate, Tr. Roy. Soc. S. Aust., xi, p. 69. 
1900 Diplodon (Hyridella) shuttleworthi (Lea). Simpson, Pr. U.S. 
Nat. Mus., xxii, p. 893. 
1917 Diplodon shuttleworthi (Lea). Odhner, K. Sv. Vet. Ak. Handl., lii, 
(16), p. 74. 
1932 Hyridella angasi (Reeve). Cotton and Gabriel, Pr. Roy. Soc. Vict., 
xliv, (n.s.), Pt. 2, p. 157, pi. 16, fig. 3. 
1934 Centralhyria angasi (Reeve). Iredale, Aust. Zool., viii, Pt. 1, p. 
66, pi. 5, fig. 4; pi. 6, fig. 1. 
Size of Average Specimen. — Length, 58 mm.; breadth, 
100 mm. 
Locality . — Cramenton; K. Murray (Nat. Mus., Melb.). 
Vernacular Name. — Angas’s Freshwater Mussel. 
Odservations. — This elongated form is easily recognized; 
it is the largest Victorian freshwater Mussel. The nacre, as 
Smith notes, is sometimes entirely white, bluish, or purplish ; 
but the upper and posterior parts are nearly always more or 
less stained with livid purple, or olive, or a combination of 
these colours which is difficult to define. 
Genus PROPEHYRIDELLA Cotton and Gabriel, 1932. 
PropeJiyridella yiepeaneyisis (Conrad). 
(PI. IV, Fig. 40.) 
1830 Unio depressus Lesson, Voy. Coquille, ii, p. 427, pi. 15, fig. 5 (nom. 
preocc. ) . 
1850 U. nepeanensis Conrad, Pr. Ac. Nat. Sci. Phil., v, p. 10. 
1852 Id. Conrad, Jour. Ac. Nat. Sci. Phil., ser. 2, p. 297, pi. 26, fig. 4. 
1865 Unio lessoni Kuster, Conch. Cab., pi. 36, fig. 4. 
1865 U. nepeanensis Conrad. Reeve, Conch. Icon., xvi, pi. 23, fig. 10. 
1882 Id. Smith, Journ. Linn. Soc. Lond., Zool., xvi, p. 312. 
1900 Diplodon (Hyridella) dorsuosus Gould. Simpson, Pr. U.S. Nat. 
Mus., xxii, p. 889. 
1900 Diplodon (Hyridella) lessoni (Kuster). Simpson, ibid., p. 890. 
1932 Propehyridella nepeanensis (Conrad). Cotton and Gabriel, Pr. Roy. 
Soc. Vict., xliv, (n.s.), Pt. 2, p. 158, pi. 16, fig. 5. 
1934 Id. Iredale, Aust. Zool., viii, Pt. 1, p. 73 (in part), pi. 5, figs. 11, 
12 (not 13); pi. 6, figs. 11, 12 (not 13). 
1934 Hyridella (Propehyridella) nepeanensis (Conrad). Thiele, Hdbch. 
Syst. Weichtierkunde, p. 838. 
Size of Average Specimen. — Length, 38 mm.; breadth, 
62 mm. 
Ijocalities. — Mitchell River at Bairnsdale (J. A. Kershaw, 
