808 PROCEEDINGS OF THE NATIONAL MUSEUM. 



tNODULARIA DOUGLASI/E Gray.' 



* I'nio (loiiglasiw GRAY, Griff. An. King., XII, 1833, (p. 601 index, 1834), pi. xxi, lig. 



2. *PJETEL, Conch. Sam., Ill, 1890, p. 151. 



* t Unio murcliisonianus LEA, Tr. Ani.Phil. Soc., V, 1834, p. 33, pi. in, fig. 6; * Obs., I, 



1834,p. 145, pi. in, fig. 6.* HANLEY, Test. Moll.,1842,p. 177; * Biv. Shells,1843, 

 p. 177, pi. xxi, fig. 53. * CATI.OW and REEVE, Conch. Norn., 1845, p. 61. 

 *KCSTKR, Conch. Cab. Unio, 1856, p. 166, pi. XLVIII, figs. 3, 4. *H. and A. 

 ADAMS, Gen. Rec. Moll., II, 1857, p. 497. *CHEXU, Man., 1859,11, p. 142, fig. 

 701. *SOWERBY, Conch. Icon., XVI, 1866, pi. xxxvm, fig. 207. *P,KTEL, 

 Conch. Sam., Ill, 1890, p. 160. "vox IHERIXO, Abh. Senck. Nat. Ges., XVIII, 

 1893, p. 159. 



* Margarita ( Unio) murchisonianus LEA, Syn., 1836, p. 14 ; 1838, p. 14. 



* Margaron ( Unio) mnrchisonianus LEA, Syn., 1852, p. 21 ; 1870, p. 32. 



* Unio osbecki PHILIPPI, Zeits. fiir Mai., 1845, p. 164; * Conch., Ill, 1847, p. 45, pi. 



in, fig. 1. "H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 497. "Kl'STER, 

 Conch. Cab. Unio, 1861, p. 236, pi. LXXIX, fig. 3. * SOWERBY, Conch. Icon., 

 XVI, 1868, pi. i.xix, fig. 353. * P.ETEL, Conch. Sam., Ill, 1890, p. 162. 

 "Margaron ( Unio) osbecki LEA, Syn , 1852, p. 21 ; 1870, p. 32. 



* t Unio nujr-persicHS DUXKER, Zeits. fiir Mai., 1848, p. 83.- * MUSGRAVE, Phot. 



Conch., 1863, pi. i, fig. 10. * SOWERBY, Conch. loon., XVI, 1868, pi. LXXIII, 

 fig. 373; * P^CTEL, Couch, Sam., Ill, 1890, p. 161. 



* Margaron (I'nio) nux-persicus LEA, Syu., 1870, p. 32. 



* t Unio wrightil LEA, Pr. Ac. N. Sci., Phila., IX, 1865, p. 75 ; * Jl. Ac. N. Sci. Phila., 



VI, 1868, p. 283, pi. xxxix, fig. 97 ; * Obs., XII, 1869, p. 43, pi. xxxix. fig. 97. 



* Margaron ( Unio) wrightii LEA, Syn., 1870, p. 32. 



* Unio sculptus DESHAYES, Bull. Nouv. Arch. Mus., IX, 1873, p. 9, pi. i, figs. 3, 3a. 



* HEUDE, Conch. F. Nank., Ill, 1877, pi. xxiv, fig. 51.* P.ETSL, Conch. Sam., 

 Ill, 1890, p. 167. 



* Unio dactyliniis HEUDE, Conch. F. Nank., 1885, pi. Lxv. 3 



*tUnio plctorum var. longirostris WESTERLUXD, Kong so. vet. Ak. Hand, XIV, No. 



12, p. 74. 4 



Unio schrencki WESTERLUXD. Where described? 

 Unio abbrcriatus WESTERLUND. Where described?" 1 



tNODULARIA DOUGLASI^ var. SHANGHAIENSIS Lea. 



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



Phila., IV, 1860, p. 242, pi. xxxvi, fig. 121; * Obs., VII, 1860, p. 60, pi. xxxvi, 

 fig. 121. * REEVE, Conch. Icon., XVI, 1865, pi. xxi, fig. 96. "P/ETEL, Conch. 

 Sam., Ill, 1890, p. 167. 



* Uniopictorum var. amurensis Morssox, Jl. de Conch., XXXV, 1887, p. 26, pi. I, fig. 8. 



'The plate in Griffith's Cuvier on which this species is figured bears date of 1833, 

 and the names of the species are designated on it. The brief description (in the 

 index) was published in 1834, the date of the work. Lea's Unio murchisonianus was 

 not published until 1834. This species has an immense distribution and varies 

 greatly in form and degree of sculpture. 



' 2 An author's shell in the Lea collection is certainly a young U. douglasia-. 



3 This and U.firmus and chloreus with others are given as varietal names and lettered. 



Credited by Westerluud to Amurland. I'nio picto rum, or varieties of it, have 

 several times been credited to this region, but no doubt erroneously. This species 

 is always darker when adult than the well-known European species, and has totally 

 different beak sculpture. The two shells often resemble each other closely in form. 



6 Specimens of shells bearing the above names, labeled by Westerlund, are in the 

 U. S. National Museum. 



6 A smooth form of douglasice, possibly worthy of a varietal name. 



