NO. 1205. SYNOPSIS OF THE NAIADES SIMPSON. 817 



tNODULARIA OLIVARIA Lea. 



* Unio olivarius LEA, Tr. Am. Phil. Soc., IV, 1831, p. 108, pi. xvi, fig. 38; *Obs., 



I, 1834, p. 118, pi. xvi, fig. 38. * HANLEY, Test. Moll., 1842, p. 195; *Biv. 

 Shells, 1843, p. 195, pi. xxn, fig. 32.* H. and A. ADAMS, Gen. Eec. Moll., II, 

 1857, p. 494. *CHENU, 111. Conch., 1858, pi. vm, figs. 11, lla, 11&. *KUSTER, 

 Conch. Cab. Unio, 1861, p. 244, pi. LXXXII, fig. 2. *SOWERBY, Conch. Icon., 

 XVI, 1866, pi. xxxvi, fig. 195.* HANLEY and THEOBALD, Conch. Ind., 1876, 

 p. 5, pi. x, fig. 1. P^TEL, Couch. Sam., Ill, 1890, p. 161. 



* Margarita ( Unio) olivarius LEA, S.vn., 1836, p. 26 ; 1838, p. 20 ; 1852, p. 30 ; 1870, p. 47. 



* Uniopumilio KUSTEK. Conch. Cab. Unio, 1862, p. 268, pi. xc, fig. 7. 



India. 



tNODULARIA NUTTALLIANA Lea. 



* Unio nuttaUianus LKA.J Pr. Ac. N. Sci. Phila., VIII, 1856, p.103; *Obs.,VI, 1857 



p. 30, pi. xxx, fig. 25; Jl. Ac. N. Sci. Phila., Ill, 1858, p. 310, pi. xxx, fig. 

 25. *HANLEY and THEOBALD, Conch. Ind., 1876, p. 19, pi. XLI, figs. 5, 6. 

 *P.ETEL, Conch. Sam., Ill, 1890, p, 161. 



* Margaron ( Unio) nitttallianns LEA, Syn., 1870, p. 74. 



India. 



NODULARIA INVOLUTA Benson. 



* Unio involutus BENSON, Hanley Biv. Shells, 1856, p. 385, pi. xxm, fig. 19. 



* HANLEY and THEOBALD, Conch. Ind., 1876, p. 19, pi. XLI, fig. 2. * P^ETEL, 

 Conch. Sam., Ill, 1890, p. 156. 



* Margaron ( Unio) inrolutus LEA, Syn., 1870, p. 37. 



*Unio involuta SOWERBY, Conch. Icon., XVI, 1866, pi. xxxiv, fig. 177. 



Assam. 



Group of Nodularia contradens.) 



Shell inflated, obovate, rhomboid, with a slight swelling at the post 

 base, and a well developed posterior ridge; beaks full and high, the 

 sculpture consisting of wavy, zigzag ridges which often extend over 

 the shell as somewhat nodulous corrugations ; pseudocardinals obliquely 

 or vertically striate ; laterals curved, cavity of the beaks rather shallow. 



tNODULARIA CONTRADENS Lea. 



* Unio contradens LEA, Tr. Am. Phil. Soc., VI, 1838, p. 75, pi. xvm, fig. 58; * Obs., II, 



1838, p. 75, pi. xvm, fig. 58.* TROSCHEL, Arch, fur Nat., V, 1839, Pt. 2, p. 237. 



* HANLEY, Test. Moll. ,1842, p. 209; Biv. Shells, 1843, p. 209, pi. xxn, fig. 8. 



* CATLOW and REEVE, Conch. Nom., 1845, p. 57. * H. and A. ADAMS, Gen. Rec. 

 Moll., II, 1857, p. 492. *CHENU, 111. Conch., 1858, pi. xxix, figs. 4, 4a,45. 



* REEVE, Conch. Icon., XVI, 1865, pi. xxix, fig. 149. * P.ETEL, Conch. Sam., 

 Ill, 1890, p. 148. 



* Margarita ( Unio) coniradens LEA, Syn., 1838, p. 25. 



* Margaron ( Unio) contradens LEA, Syn., 1852, p. 39; 1870, p. 46. 



* t Uniojavanus LEA, Pr. Am. Phil. Soc., I, 1840, p. 285 ; * Tr. A.m. Phil. Soc., VIII, 



1842, p. 220, pi. xvm, fig. 37; *0bs., Ill, 1842, p. 58, pi. xvm, tig. 36. *H. and 

 A. ADAMS, Gen. Rec. Moll., II, 1857, p. 494. *CHENU, 111. Conch., 1858, pi. 

 xxvm, figs. 4, 4a, 4fc. * KUSTEK, Conch. Cab. Unio, 1856, p. 138, pi. XLI, fig. 3 ; 

 1861, p. 236, pi. LXXIX, figs. 4, 6.* SOWERBY, Couch. Icon., XVI, 1868, pi. xc, 

 fig. 489.* P.ETEL, Conch. Sam., Ill, 1890, p. 155. 



Proc. N. M. vol. xxii 52 



