NO. 1205. SYNOPSIS OF THE NAIADES SIMPSON. 841 



(Group of Parreymn corrugata.} 



Shell having the middle of the basal region swollen, beak sculpture 

 strong, the central ridges generally united at their lower points to form 

 chevron-shaped markings. 



tPARREYSIA CORRUGATA Muller. 



* Mya corrugata MULLER,' Verm. Terr, et Fluv., 1774, Pt. 2, p. 214; * Bescli. Ges. 



Nat. Ber.,IV, 1779, p. 56, pi. in/;, figs. 7, 8. *GMELIN,- Sys. Nat., 13th ed., 

 1788, p. 3221.* SCHROTEK, Fluss, Conch., 1779, p. 181, pi. ix, fig. 3.^ WOOD, 

 Gen.Conch., 1, 1815, p. 108, pi. xxiv, figs. 1-3.* DiLLWYX,Cat., 1, 1817, p. 52. 

 MAWE, Linn. Conch., 1823, pi. iv, fig. 3.* WOOD, Ind. Test., 1825, p. 12, pi. n, 

 fig. 31 a; 1856, rev. ed., p. 16, pi. n, fig. 31. 



* Unto corrugaia LAMARCK, 3 An. sans Yert., VI, 1819, p. 78. * DESHAYES, Enc. 



Meth., II, 1827, p. 584, pi. CCXLVIII, fig. 8. 



*Unio (Polamida) corrugata SWAINSON, Tr. on Mai., 1840, p. 268, fig. 51; p. 281, 

 fig. 57. 



* Unio corrugata RETZIUS, Diss. Hist. Nat., 1778, p. 18. * SPENGLER, Skriv. Selsk. 



Nat., Ill, 1793, p. 68. *HANLEY, Test. Moll.. 1842, p. 197; *Biv. Shells, 1843,p. 

 197. * CATLOW and RKEVE, Conch. Nora., 1845, p. 57. * H. and A. ADAMS, 

 Gen. Rec. Moll., II, 1857, pp. 493, 497. * KUSTER, Conch. Cab. Unio, 1862, 

 p. 289, pi. xcvn, figs. 3, 4.* BLANFORD, Jl. As. Soc. Beng., XXXV, 1867, 

 p. 136. * SOWERBY, Conch. Icon., XVI, 1868, pi. LXXI, fig. 360. * HANLEY 

 and THEOBALD. Conch. Ind., 1876, p. 21, pi. XLV, figs. 2-5. *P.ETEL, Conch. 

 Sam., Ill, 1890, p. 149. 



* Margarita ( Unio) corrugatus LEA, Syn., 1836, p. 29; 1838, p. 21. 

 * Margaron ( Unio) corrugatus LEA, Syn., 1852, p. 20; 1870, p. 30. 



* Mya apuria GMELIX, Syst. Nat., 13th ed., 1788, p. 3222; *WooD, Gen. Conch., I, 



1815, p. 110. "LAMARCK, An. sans Vert., VI, 1819, p. 80. 

 Mya gaditana SCHREIBERS, Versuch., 1793, p. 



* Unio multidentatus PHILIPPIC Conch., Ill, 1847, p. 46, pi. in, fig. 4. * KUSTER, 



Conch. Cab. Uuio., 1856, p. 136, pi. xxxvi, fig. 5. *P.ETEL, Conch. Sam., Ill, 

 1890, p. 160. 



* Margaron ( Unio) multidcntatus LEA, Syn., 1870, p. 50. 



* Unio fulmineus PHILIPPIC Conch., Ill, 1847, p. 46, pi. in, figs. 5, 6. * KUSTER, 



Conch. Cab. Unio., 1862, p. 286, pi. xcvi, figs. 2, 3.* P.ETEL, Conch. Sam., Ill, 

 1890, p. 153. 



* Unio lutens LEA, S Pr. Ac. Nat. Sci. Phila., VIII, 1856, p. 93. 



* Unio luteus LEA, Jl. Ac.N. Sci. Phila., Ill, 1857, p. 291., pi. xxiv, fig. 4; *Obs., 



VI, 1857, p. 11, pi. xxiv, fig. 4. 



'Miiller's description of Mya corrugata is inadequate, but in the Beschaftigungen 

 it is further discussed and characteristic figures are given of the species we know 

 as Unio corrugatus of India. 



2 Refers to Conch. Cab. VI, pi. in, fig. 22, which is probably Miiller's shell. 

 Chemnitz refers to it as Mya corrugata teste oraH, etc. The shell referred to by him 

 in Conch. Cab., X, p. 346, as Mya corrugata magna, etc., is a very different thing. 



:i Lamarck refers to Enc. Meth. Pt. 19, 1797, pi. CCXLVIII, figs. 6, 8 a, 1). I am not 

 at all sure that fig. 6 is the corrugatus of Muller. 



""Credited by Philippi to Parreyss. I think there can be no doubt that this is the 

 Mya corrugata of Miiller, as the figure and description entirely agree with the species 

 as we know it. 



5 Parreyss is the author, according to Philippi. This and multidentatus are credited 

 by Philippi to Australia. No shells like these have ever been found there. 



6 Lutens in text, by error 110 doubt. 



