PAERETSIA. 



155 



Unio cornu/ata, Lamarck, Au. sans "N'ert. vi, 1819, p. 78 ; Deshayes, 

 Enc. Mt^th. ii, 1827, p. oS4, pi. 248, fig. 8. 



Vnio i Potamid(t) cornH/ata, tSwaiuson, Tr. on Mai. 1840, p. 268, 

 fig. 51; p. 281, fig. o?'. 



Ujiio corrufjata, Retzius, Diss. Hist. Nat. 1778, p. 18; Spengler, 

 Skriv. Selslv. Nat. iii, 1793, p. 68 ; llanley, Test. Moll. 1842, 

 p. 197; Biv. Shells, 1843, p. 197; Catlow & Reeve, Conch. 

 Norn. 184-'), p. 57 ; 11. .t A. Adams, Gen. Rec. Moll, ii, 1857, 

 pp. 493, 497 ; Kiister, Conch. Cab., Unio, 1802, p. 289, pi. 97, 

 figs. 3,4: Blanford, J. A. S. B. xxxv, 18G7, p. 13G; Sowerby, 

 Conch. Icon, xvi, 1868, pi. 71, fig. 360; II. & T., C. I. 1876, 

 p. 21. pi. 45, figs. 2-5 ; Pictel, Couch. Sam. iii, 1890, p. 149.^ 



JMargarita [Unio) cornif/atiis, Loa, Syu. 1836, p. 29; 1838, p. 21. 



Mar'ijarun ( Uuio) cornii/atns, Lea, Syn. 1852, p. 20 ; 1870, p. 30. 



Mya sjmria, Gmelin, Syst. Nat. 13th ed. 1788, p. 3222 ; Wood, 

 Gen. Conch, i, 1815, p. 110; Lamarck, An. sans Vert, vi, 1819, 

 p. 80. 



Ml/a gadifana, Schreiber's Yersuch. 1793. 



Unio multidentatus, Philippi, Conch, iii, 1847, p. 46, pi. 3, fig. 4 ; 

 KUster, Conch. Cab., Unio, 1856, p. 136, pi. 36, fig. 5 ; PcX'tel, 

 Conch. Sam. iii, 1890, p. 160. 



Conch. Sam. iii, 1890, p. 153 

 Unio lutens, Lea, Proc. Acad. Nat. Sci. Philadelphia, viii, 1850, 

 p. 93; .louru. Acad. Nat. Sci. Philadelphia, iii, 1857, p. 291, 

 pi. 24, fig. 4 : Obs. Genus Unio, vi, J857, p. 11, pi. 24, fig. 4. 

 Marf/aron ( Unio) lutens, Lea, Syu. 1870, p. 46. 

 ? Uiiio seminif/atits, Chenu, Couch, iii, 1858, pi. 12^, figs. 2, 2 a. 

 Unio merodahensis, Kiister, Conch.-Cab., Unio. 1861, p. 233, pi. 78, 

 fig. 4 ; Blanford, J. A. S. B. xxxv, 1866, p. 142 ; Paetel, Couch. 

 Sam. iii, 1890, p. 159. 

 Unio wijne(jun(iaensi><, II. & T., C. I. 1876. p. 21, pi. 45, fig.6. 

 Unio tennenti',n. & T., C. I. 1876, p. 22, pi. 45, figs. 7 & 9; Psetel, 

 ■ Conch. Sam. iii, 1890, p. 169. 

 Unio pJiayresi, Theobald MSS. 

 Original description. — Testa viridescens, tenera, pellucida, ab 

 utraque cardiiiis parte et in iiatibus striis elevaiis rugosis, figuraqiie 

 a pra>cedente distincta. Yalvulse intus striis radiautibus, sub- 

 tilissimus notantur. Cetera uti in pr^cedente. Epidermide 

 I'emota margaritacea evadit. 

 Hah. Elvers of Coromandel. 



The species has a wide range and is represented in the Indian 

 Museum Collection by a long series of specimens, definite localities 

 for which are as follows :—Garcliiroti Tahsil : Kiver Dukkaree 

 near Umballa ; Ceylon; Sewau, close to the Indus; Gudur, 

 Madras Presidency'; Manbhoom ; Patua ; Berliampore ; Murshi- 

 dabad District: Brahmapuri Tahsil; Bangalore; Plienchooganj, 

 Sylhet ; Singpal Garki, iSepal ; Arrah, Assam. 



As the original description is short ai\d somewhat inadequate, 

 the following" taken from the ' Coucliologia Iconica ' may be of 

 interest : — Testa parva, viridi, subventricosa, magis minusye ovah, 

 vix ina^quilaterali, Irevigata, paucis autem linearibus obliquis nates 



