NO. 12(15. SYNOPSIS OF Till: .V.I /.I />/>' SIMPSON. 697 



p. 195; Biv. Shells, 1843, p. 195. * Snim./. Schleis. L. and W. Moll., 

 184:;, p. 133. " BROWN, 111. Keceiit Conch., 1844, p. 82, pi. . \x.\i, tigs. 3, 3a, 

 4-6. *Dui>UY, Hist. Moll. Fr., 1852, p. 638, pi. xxv. ligs. 11, 15. *KUSTER, 

 Conch. Cab. Unio, 1854, p. 121, pi. xxxm, figs. 4-7; xxxiv, tigs. 1,2. 

 vu\ WAHL, Suss. Biv. Liv., 1855, p. 96. *MOQUIN-TANDON, Moll. Ten-, et 

 Fluv. Fr., II, 1855, p. 571, pi. XLIX, figs. 7, 8. *DKOUET, Nay. Fr., II, 1857, 

 p. 79, pi. vi, fig. 1. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p.493. 

 *BIELZ, Faun. Siebon, 1863, p. 193. *BOURGUIGNAT, Mai. Alg., 1864, p. 286, 

 id. xix, fig. "9; xx, figs. 1-4. * SOWEKBY, Conch. Icon., XVI, 1866, pi. xui, 

 fig. 234." BKOT, Coq. Fain. Nay. Leman, 1867, p. 49, pi. ix, figs. 1-5.* Ko- 

 BELT, Fuun. Nass. Moll., 1871, p. 242. * LEHMAN, Die Sehnecken, 1873, p. 

 295. *CLESSIN, Deutsche Ex. Moll., 1876, p. 463, fig. 302. * DROUET, .M. in. 

 Acad. Dijon, VII, 1882, p. 18 (reprint). * CLKSSIN, Moll. Oest., 1887, p. 

 741.* WESTERLUND, Faun. Pal., II, Pt. 7, 1890, p. 74.* P.KTEL, Couch. 

 Sam., Ill, 1890, p. 145.* LOCARD, Coq. de Fr., 1893, p. 167.* WESTERLUND, 

 . Act. Soc. F. and F. F., XIII, No. 7, 1897, p. 162. 



* Margarita ( Unio) batavus LEA, Syn., 1836, p. 26; 1838, p. 20. 

 *Maryaron (Unio) batavus LEA, Syu., 1852, p. 30; 1870, p. 47. 



*Unio batavl var. ? ROSSMASSLER, Icon., V and VI, 1837, p. 55, pi. xxix, fig. 410. 



*Unio nanus DUPUY, Hist. Moll. Fr., 1852, p. 640, pi. xxv, fig. 16. * KOHELT, 

 Icon., VI, 1879, p. 42, pi. CLXII, figs. 1642, 1643.* LOCARD, Coq. de Fr.,1893, 

 p. 154, fig. 168. 



/ tiio riparia C. PKEIKFER, Nat. L. and S. Moll., 1821, Pt. 1. p. 118, pi. v, fig. 

 13. *KLEEBERG, Moll. Bor., 1828, p. 39. 



*Unio riparius SCIIOLX, Schleis L. and W. Moll., 1843, p. 129. * WESTERLUND, 

 Faun. Pal., II, Pt. 7, 1890, p. 90. * LOCARD, Coq. de Fr., 1893, p. 164. 



*? Unio crassus NILSSON/ Hist. Moll. Svec., 1822, p. 108. *ROSSMASSLER, Icon., II, 

 1835, p. 19, pi. vin, figs. 126, 127- ; V and VI, 1837, p. 55, pi. xxxix,fig. 111. 

 MOQUIN-TANDON, Moll. Terr, and Fluv. Fr., II, 1855, p. 570; III, pi. XLIX, 

 figs. 3, 4. *NORDENSKIOLD and NYLANDER, Fin. Moll., 1856, p. 84, pi. vi, 

 fig. 72. * DROUET, Nay. Fr., II, 1857, p. 76, pi. iv, fig. 2. * WESTERLUND, 

 Faun. Sw., N. and Den., 1873, p. 569. 3 * LOCARD, Coq. de Fr., 1893, p. 162, 

 fig. 176. * WESTERLUND, ActaSoc. F. and F. F.. XIII, No. 7, 1897, p. 159. 



* Unio crassus variety batants JORDAN, .Jahrb. Deuts. Mai. Ges., VI, 1879, p. 307. 

 *Unio ater NILSSON. Hist. Moll. Svec., 1822, p. 107. * ROSSMASSLER, Icon., II, 



1835, p. 23, pi. ix, fig. 133; VII and VIII, 1838, p. 41, XL, fig. 543. *SCHOLZ, 

 Schleis. L. and F. W. Moll., 1843, p. 131.* KUSTER, Conch. Cab. Unio, 1854, 

 p. 114, pi. xxi, figs.l, 2, 6; xxxn, figs. 1-4. * MOQUIN-TANDON, Moll. 

 Terr, et Fluv. Fr., II, 1855, p. 570, pi. XLIX, figs. 5, 6. *DROUET, Nay. Fr., 

 II, 1857, p. 72, pi. iv, fig. 1 ; Meui. Acad. Dijon, VII, 1882, p. 14 (reprint). 

 * WESTERLUND, Faun. Pal., II, Pt. 7, 1890, p. 65. *P.*:TEL, Couch. Sam., Ill, 

 1890, p. 145. *LOCARD, Coq. de Fr., 1893, p. 176. *WESTERLUND, Act. Soc. 

 F. and F. F., XIII, No. 7, 1897, p. 160. 

 *Unio atra DESHAYES, Encyc. Meth., II, 1830, p. 582. 



Unio ruyatus MENKK, Syu. Moll., 1828, p. 90. *ROSSMASSLER, Icon., V and VI, 

 1837, p. 65, pi. xxix, fig. 415. 



I'n'w elongata MICHAUD, Comp. Hist. Moll. Fr., 1831, p. 113, pi. xvi, fig. 29. 



I'nio labacenris ROSSMASSLER, Icon., II, 1835, p. 21. 



'>>'ilsson claims that this is Retzius' species, and that it is found in the rivers of 

 Sweden. His Latin description is so brief that nothing can be made out of it. I 

 have no doubt that he had Unio batarus before him when he wrote it. 



3 1 believe that this in a rather large batavus and the figures are almost exactly like 

 those he gives of that species. 



"Claimed to be crassus of Retzius, but he gives U. ater of Nilssou as one variety 

 and batarus Lamarck as another. 



