NO 1205. SYNOPSIS OF THE XAIADES-SrMrSOK 893 



* Margaron ( Unio) evansi Lea, Syn., 1870, p. 56. 



* Margaritana evansi P.etkl, Conoh. 8am., Ill, 1890, p. 173. 



Murray River, Australia 



Section CTJCTJMERIA Conrad, 1853. 

 (Type, Unio novw-hollandia; Gray.) 



Shell elongated, trapezoidal, widest behind; pseudocardinals irregu- 

 lar, small, not well developed, showing a tendency to break into denti- 

 cles; laterals feeble; pallialline strongly pitted; nacre much thicker in 

 front. 



(Group of Diplodon novce-hollandice,) 



Shell having the i)osterior two-thirds covered with irregular nodnles, 

 which radiate somewhat from the posterior ridge. 



fDIPLODON NOViE-HOLLANDI.(E Gray. 



*Unio novce-hollandia; GJiAY, Pr. Zool. Soc. Lonrl., 1834, p. 57. — *Moli,er, Syn. 



Nov. Gen., 1836, p. 197.—* Hanley, Test. Moll., 1842, p. 182 ; * Biv. Shells, 1843, 



p. 182. — *Catlow and Reeve, Conch. Nom., 1845, p. 61. — "H. and A. 



AdaiMS, Gen. Eec. Moll., II, 1857, p. 496.— ^Pjetel, Conch. Sam., Ill, 1890, 



p. 161. 

 "" Margarita ( Unio) nora-lioUandiw Lea, Syn., 1836, p. 17; 1838, p. 16. 



* Margaron (Unio) novcB-hoUandia' Ij-ea, Syn., 1852, p. 23; 1870, p. 35. 



*\Unio cticumoides Lea, Proc. Am. Phil. Soc, 1840, p. 285; "Tr. Am. Phil. Soc, 

 VIII, 1842, p. 192, pi. VII, fig. 2; *Obs., Ill, 1842 p. 30, pi. vii, fig. 2.—* Han- 

 lev, Biv. Shells, Sup., 1856, p. 382, pi. xxiv, fig. 4.—* H. and A. Adams, Gen. 

 Rec.MolL, II, 1857, p. 497.— *Chenu, 111. Conch., 1858, pi. xxvii, figs. 3, 3a, 

 3&.— *KuSTER, Conch. Cab. Unio, 1861, p. 219, pi. lxxiv, fig. 1.—* Reeve, 

 Conch. Icon., XVI, 1865, pi. xix, fig. 89.— *P.etel, Conch. Sam., Ill, 1890, 

 p. 140. 



* Mar gar on {Unio) cuciimoides Lea, Syn., 1852, p. 21; 1870, p. 31. 



* ? Unio cinningianiis DUNKER, Zeits. fiir Mai., 1853, p. 53. 



Australia. 



(Group of Diplodon shuttleivortMi.) 



Beak sculpture consisting of strong, irregularly radiate, curved, 

 nodulous bars; surface of shell somewhat sulcate, but not nodulous. 



t DIPLODON SHUTTLEWORTHII Lea. 



* Unio slnittletcorthii Lea, Pr. Ac. N. Sci. Phila., VIII, 1856, p. 94; * Jl. Ac. N. Sci. 



Phila., Ill, 1857, p. 304, pi. xxviii, fig. 19; VI, 1857, p. 24, pi. xxvm, fig. 19.— 

 " SowERBY, Conch. Icon., XVI, 1866, pi. xxxii, fig. 167. 



*Margaroj\ ( Unio) shuttleivurthii Lea, Syn., 1870, p. 36. 



""fUnio mutaUUs Reeve, Conch. Icon., XVI, 1865, pi. xxiv, fig. 112. 



*Unio arigasi Sowerby, Conch. Icon., XVI, 1867, pi. i.v, fig. 282. 



* Margaritana angasi P^tel, Conch. Sam., Ill, 1890, p. 172. 

 "Avodonta angasi P^etel, Conch. Sam., Ill, 1890, p. 176. 



Australia. 



