808 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



tNODULARIA DOUGLASIi^ Gray.' 



* Unto douglasue Gray, Griff. An. King., XII, 1833, (p. 601 index, 1834), pi. xxi, fig. 



2.—* P^TEL, Couch. Sam., Ill, 1890, p. 151 . 



* t Unto murchisoniamis Lea, Tr. Am. Phil. Soc, V, 1834, p. 33, pi. iii, fig. 6; *Obs., I, 



1834,p. 145, pi. Ill, fig. 6.—* Hanley, Test. Moll., 1842, p. 177; * Biv. Shell8,1843, 

 p. 177, pi. XXI, fig. 53.— *CatiJow and Reeve, Conch. Nom., 1845, p. 61. — 



* KusTER, Conch. Cab. Unio, 1856, p. 166, pi. xlviii, figs. 3, 4.— ^'H. and A. 

 Adams, Gen. Rec. Moll., II, 1857, p. 497.— *Chenu, Man., 1859, II, p. 142, fig. 

 701.— *SowERBY, Conch. Icon., XVI, 1866, pi. xxxviii, fig. 207.— "^P^tel, 

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

 1893, p. 159. 



" Margariia ( Unto) murchisonianits Lea, Syn., 1836, p. 14 ; 1838, p. 14. 



* Margaron ( Unio) murchisonianus Lea, Syu., 1852, p. 21 ; 1870, p. 32. 



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



Ill, fig. 1.— "H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 497.— *Kustkr, 

 Conch. Cab. Unio, 1861, p. 236, pi. lxxix, fig. 3. — *Sowerby, Conch. Icon,, 

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

 ^ Mar gar on ( Unio) oshecki Lea, Syn , 1852, p. 21 ; 1870, p. 32. 



* t Unio mix-persxcus Dunker, Zeits. fiir Mai., 1848, p. 83.- — * Musgrave, Phot. 



Conch., 1863, pl.i, fig. 10.— "Sowerby, Conch. Icon., XVI, 1868, pi. lxxiii, 

 fig. 373; ' PyETEL, Conch, Sam., Ill, 1890, p. 161. 

 * Margaron (Unio) nux-persicus Lea, Syn., 1870, p. 32. 



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



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

 ^ Margaron {Unio) wrightii Lea, Syn., 1870, p. 32. 

 " Unio SGulptus Deshayes, Bull. Nouv. Arch. Mus., IX, 1873, p. 9, pi. i, figs. 3, 3a. — 



* Heude, Couch. F. Xank., Ill, 1877, pi. xxiv, fig. 51.—* P.etsl, Conch. Sam., 

 Ill, 1890, p. 167. 



* Unio dactylinus Heude, Conch. F. Nank., 1885, pi. lxv.-' 



■^"lUnio 2>ictorum var. longirostris Westerlund, Kong so. vet. Ak. Hand, XIV, No. 



12, p. 74.^ 

 Unio schrencki Westerlund. Where described? 

 Zhvio ahhreviatus Westerlund. Where described f* 



tNODULARIA DOUGLASIi^E var. SHANGHAIENSIS Lea. 



. . " t Unio shanghaiensis Lea, Pr. Ac. N. Sci. Phila., Ill, 1859, p. 153;'' * 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'vsx. amurensis Mou.ssON, Jl.de Conch., XXXV, 1887, p. 26, pi. i, fig. 8. 



'The plate in Griffith's Cuvier ou 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 murchisonianits was 

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

 greatly in form and degree of sculpture. 



-An author's shell in the Lea collection is certainly a j'oung U. douglasiw. 



^This and U.Jirmus and chloreiis with others are given as varietal names and lettered. 



■•Credited by Westerlund to Amurlaud. Unio pictorum, 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. 



^A smooth form of douglasiw, possibly worthy of a varietal name. 



