NO. 1205. SYNOPSIS OF THE NAIADES SIMPSON. 535 



tLAMPSILIS LUTEOLUS var. ROSACEUS De Kay. 



* Unio roa'ticeus DE KAY, Zool. of New York, V, 1843. p. 19:.'. pi. xxxix, tigs. 355, 356; 



pi. XL, iig. 357.' CONRAD, Pr. Ac. Nat. Sci. Phila., VI, 1853, p. 257. B. H. 

 WRIGHT, Check List, 1888. 



' Entire Mississippi drainage, southwest to the Brazos River, Texas; 

 St. Lawrence drainage; entire Dominion of Canada east of the Rocky 

 Mountains; the variety romceus in the St. Lawrence area. 



t LAMPSILIS SUPERIORENSIS Marsh. 2 



* Unio superiorensis MARSH, Naut., X, 1897, p. 103, pi. i, figs. 1, 2, 5. 

 Upper Great Lakes region. 



t LAMPSILIS BOREALIS A. F. Gray."- 



* Unio boreali* A. I". CRAY, Tr. Ottawa Field Nat. Club, 1882, p. 53, pi., 3 



figures. * B. H. WRIGHT, Check List, 1888. 



Lower St. Lawrence drainage, to Lake Michigan; Lake of the 

 Woods. 



tLAMPSILIS RADIATUS Gmelin. 



" Mya radiata GMELIN, Syst. Nat., 13th ed., 1792, p. 3220." Wooi>, Gen. Couch., I, 

 1815, p. 109.* DILLWYN, Cat. I, 1817, p. 51.* WOOD, Index Test. 2d ed., 

 1825, p. 12, pi. n, fig. 2.* EATON, Zool. Text-Book, 1826, p. 220. * HANLEY, 

 Index Test., 3d ed., 1856, p. 16, pi. n, fig. 32. 



* Unio radiata LAMARCK, An. sans. Vert., VI, 1819, p. 73. *DESHAYES, Hist. Nat. 



desVers., II, 1830, p. 581; *An. sans. Vert., 2d ed., VI, 1835, p. 535; 3d ed., 

 1839, p. 668. < HANLEY, Test. Moll., 1842, p. 212. 

 l.ampsilis radiata STIMPSON, N. Eng. Shells, 1851, p. 13. 



* Unio radiatus SPEXGLER, Skriv. Nat. Selsk.,V, 1792, p. 3; III, 1793, p. 62.* CON- 



RAD, New F. W. Shells, 1834, p. 71.* FERUSSAC, Guer. Mag., 1835, p. 27. 

 * CONRAD, Monog., II, 1836, p. 24, pi. x, fig. 2. * SOWERBY, Rich. Faun. Bore- 

 ali Am., Ill, 1836, p. 316. * GOULD, Inv. of Mass., 1841, p. 110, fig. 73.; 

 1870, p. 170, fig. 474.* HANLEY, Test. Moll., 1842, p. 193; * Biv. Shells, 1843, 

 p. 193. *CATLOW and REEVE, Conch. Norn., 1845, p. 63. * CONRAD, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 256.* KUSTER, Conch. Cab. Unio., 1852, p. 29, pi. 

 v, fig. 1. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 494. * REEVE, 

 Conch. Icon., XVI, 1865, p. 27, pi. xxvn, fig. 139. *HARTMAX and MICHE- 

 NER, Couch. Cest., 1874, p. 87, fig. 182.* LATCHFORD, Tr. Ottawa F. Nat. 

 Club, 1882, p. 50. *B. H. WRIGHT, Check List, 1888. *H. CARPENTER, 

 Naut,, IV, 1890, p. 22.* P.ETEL, Conch. Sara., Ill, 1890, p. 165. 



* Margarita ( Unio) radiatus LEA, Syn., 1836, p. 25; 1838, p. 19. 

 Marrjaroii ( Unio) radiatus LEA, Syn., 1852, p. 29; 1870, p. 44. 



1 f'nio pictorum tennis India-, etc. CHEMNITZ, Conch. Cab., 1788, p. 23, pi. II, 

 fig. 7. 



1 The type of De Kay's variety is a delicate shell with peculiarly pallid brown 

 epidermis, slightly rayed, and having a rose-colored nacre. This form is often desti- 

 tute of the fine tinting of the nacre, and sometimes becomes quite dark, even bronzy 

 or- brownish black. It is common in the lakes of the St. Lawrence drainage. 



-This and L. borealis A. F. Gray are doubtful species which seem to stand between 

 L. luteolus and radiatus. This form is nearer Juteolun, while Gray's species approaches 

 more nearly to radiatus. 



'> In Latchford's Notes on Ottawa 1'nionidui. 



