132 
THE FRESHWATER MOLLUSCA OF VICTORIA 
T. Worcester, and Nat. Mus., Melb.) ; Gippsland Lakes (Dr. 
J. C. Cox) ; Wallagaraugh River, East Gippsland. 
Yernacular Name . — The Nepean River Corrugated Mussel. 
Observations . — Compared with specimens from the Nepean 
River, New South Wales. The species is readily identified 
hy the coarse wrinkles upon the umbones and its compara- 
tively square or truncated anterior end. Iredale regards 
P. narracanensis C. and G., as the juvenile form, an opinion 
not accepted by Cotton and Gabriel (see remarks under 
P. narracanensis). This species is the genotype of Prope- 
hyridella. 
Propehyridella cultelliformis (Conrad). 
(PI. IV, Fig. 41.) 
1819 Unio depressus Lamarck, An. S. Vert., vii, p. 79 (nom. preocc. 
Donovan, 1801). 
1841 Id. Delessert, Rec. Coq. Lam., pi. 12, fig. 5. 
1850 Unio cultelliformis Conrad, Pr. Ac. Nat. Sci. Phil., v, p. 10. 
1850 U. profugus Gould, Pr. Boston Soc. Nat. Hist., p. 295. 
1854 U. depressus Lam. Lea, Jour. Ac. Nat. Sci. Phil., p. 295, pi. 26, fig. 2. 
1859 U. mutabilis Lea, Pr. Ac. Nat. Sci. Phil., iii, p. 152. 
1860 Id. Journ. Ac. Nat. Sci. Phil., iv, p. 248, pi. 28, fig. 127. 
1862 U. paramattensis Lea, op. cit., iv, p. 176. 
1862 U. (Niaa) depressus Lam. Chenu, Man. de Conch., ii, p. 140, fig. 
679. 
1866 U. paramattensis Lea, Jour. Ac. Nat. Sci. Phil., ser. 2, vi, p. 60, 
pi. 20, fig. 59. 
1882 U. depressus Lam. Smith, Jour. Linn. Soc. Lond., Zool., xvi, p. 308. 
1887 Id. Tate, Tr. Roy. Soc. S. Aust., xi, p. 101. 
1900 Diplodon (Hyridella) mutabilis (Lea). Simpson, Pr. U.S. Nat. 
Mus., xxii, p. 308. 
1900 Diplodon (Hyridella) profugus Gould. Simpson, op. cit., p. 891. 
1914 Diplodon cultelliformis (Conrad). Simpson, Cat. Naiades, iii, p. 
1300. ■ 
1914 D. mutabilis (Lea). Simpson, op. cit., p. 1308. 
1932 Propehyridella cultelliformis (Conrad). Cotton and Gabriel, Pr. 
Roy. Soc. Viet., xliv (n.s.), p. 159, pi. 16, fig. 6. 
1934 Hyridunio renutus Iredale, Aust. Zool., viii, Pt. 1, p. 69, pi. 5, fig. 3 ; 
pi. 6, fig. 4. 
1934 Rugoshyria depressa (Lam.). Iredale, op. cit., p. 71. 
1934 R. depressa vicinalis Iredale, op. cit., p. 72. 
1934 R. cultelliformis (Conrad). Iredale, op. cit., p. 73. 
Size. — Length, 41 mm. ; breadth, 84 mm. 
Localities . — Bunyip (Nat. Mus., Melb.) ; Glengarry River; 
Mitchell River, at Bairnsdale; River Yarra at Wooriyallock; 
R. Erskine at Lome; R. Wallagaraugh, East Gippsland; 
Tarra Creek; Heidelberg; Lilydaie, Mt. Evelyn (M. E. Gat- 
liff) ; Mallacoota (C. L, Barrett). 
