856 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XXH. 



tLAMELLIDENS PULCHER Tapperone-Canefri. 

 1'nio piilclicr TAPPEROXE-CAXEKISI, Ann. Mns. Civ., VII, 1889, p. 350.' 

 Houngdaran, Burma. 



LAMELLIDENS EXANTHEMATICUS Kuster. 



* Unio exanthematicus KUSTER, Conch. Cab. Unio, 1861, p. 243, pi. LXXXI, fig. 2. 



* P^ETEL, Conch. Sam., Ill, 1890, p. 152. 



East Indies. 



tLAMELLIDENS THWAITESII Lea. 



rio Ihwaitcsii LEA, Pr. Ac. N. Sci. Phila., Ill, 1859, p. 152; * Jl. Ac. N. Sci. Phila.., 

 IV, 1860, p. 246, pi. xxxvn, fig. 125; *Obs., VII, 1860, p. 64, pi. xxxvn, tig. 

 125. * REEVE, Conch. Icon., XVI, 1865, pi. xxm, fig. 105. * HANLEY and 

 THEOBALD, Conch. Ind., 1876, p. 20, pi. XLIII, fig. 1. * P.ETEL, Couch. Sam., 

 Ill, 1890, p. 169. 



* Margaron ( Unto) thwaitesii LEA, Syn., 1870, p. 41. 



* Unio consobrinus HAXLEY and THEOBALD, Conch. Ind., 1876, p. 19, pi. XLI, fig. 7. 



Ceylon. 



tLAMELLIDENS CONSOBRINUS Lea. 



* t'Hio consobrinus LEA, Z Pr. Ac. N. Sci. Phila., Ill, 1859, p. 331; *J1. Ac. N. Sci. 



Phila,, 1860, p. 272, pi. XLV, fig. 152 ; * Obs., VII, 1860, p. 90, pi. XLV, fig. 152. 



* PJETEL, Couch. Sam., Ill, 1890, p. 148. 



* Margaron ( Unio) consobrinns LEA, Syn., 1870, p. 46. 



* Unio corbeti DESCHAMI-S, Hull. Soc. Zool. Fr., XVII, 1892, p. 68, fig. 3 



China; India; Ceylon. 



t LAMELLIDENS LAMELLATUS Lea. 



* Unio lameUatus LEA, Tr. Am. Phil. Soc., VI, 1838, p. 19, pi. vi, fig. 16; * Obs., II, 



1838, p. 19, pi. vi, fig. 16. "TROSCHEL, Arch. fiir. Nat., V, 1839, Pt. 2, p. 234. 



* HANLEY, Test. Moll., 1842, p. 194; Biv. Shells, 1843, p. 194, pi. xxi, fig. 49. 

 "CATLOwaud REEVE, Conch. Norn., 1845, p. 60. *H. and A. ADAMS, Gen. 

 Rec. Moll., II, 1857, p. 494. * CHEXU, 111. Conch., 1858, pi. xxn, figs. 3, 3a, 

 3fc. *SOWERBY, Conch. Icon., XVI, 1866, pi. LII, fig. 272. * HANLEY and 

 THEOBALD, Conch. Incl., 1876, p. 21, pi. XLIV, fig. 7. ^P.ETEL, Conch. Sam., 



III, 1890, p. 126. 



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



* Margaron (Unio) lameUatus LEA, Syn., 1852, p. 29; 1870, p. 46. 



* t Unio layardii LEA, Pr. Ac. N. Sci. Phila., Ill, 1859, p. 153; * Jl. Ac. N. Sci. Phila., 



IV, 1860, p. 243, pi. xxxvi, fig. 122; * Obs., VII, 1860, p. 61, pi. xxxvi, fig. 122. 



* REEVE, Conch. Icon., XVI, 1865, pi. xxm, fig. 111. * HANLEY and THEO- 

 BALD, Conch. Ind., 1876, p. 19, pi. XLI, fig. 1. * P.ETEL, Couch. Sam., Ill, 

 1890, p. 157. 



* Margaron ( Unio) layardii LEA, Syn., 1870, p. 46. 



India; Ceylon. 



1 Only a Latin description is given. We have two shells iu the U. S. National 

 Museum from the type lot, and it is, perhaps, a valid species, close to man/inalis. 



2 Possibly only a variety of thwaitesii. 



*Unio mainwaringi Nevill. Shells have been several times received bearing this 

 name, which seem to me to be only consobrinus. I cau not find that Nevill ever 

 described the species. 



