546 PBOCEEDINGS OF THE NATIONAL MUSEUM. 



liart.' — "Gould, Inv. of Mass.; 1841, p. 109, fig. 71. — " Binney, Gould's Inv., 

 1870, p. 169, fig:.473.--*HANLEY,Te8t. Moll., 1842, p. 206.— *De Kay, Zool. of 

 N. Y,, Pt. 5, 1843, p. 191, pi. xx, fig. 239.— -^ Hanley, Biv. Shells, 1843, p. 206.— 

 Catlow and Eeeve, Concli. Norn., 1845. p. 61. — * Conkad, Pr. Ac. N. Sci. 

 Phila.,VI, 1853, p. 252.— "H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 491.— 

 *KusTER, Conch. Cab. Unio, 1861, p. 223, pi. j-xxv, fig. 4.— -•■Eeeve, Conch. 

 Icon.. XVI, 1865, pi. XXI, fig. 94.— * Hartman and Michener, Conch. Cest., 

 1874, p. 70, fig. 186.— -B. H. Wright, Check List, 1888.— *H. Carpenter, 

 Naut., Ill, 1889, p. 94.— *P.5STEL, Conch. Sam., Ill, 1890, p. 160. 



''Margarita ( Unio) nasutus Lea, Syn., 1836, p. 37; 1838, p. 24. 



"Margaron ( Unio) nasutns Lea, Syn., 1852, p. 37; 1870, p. 60. 



''Unio nasnta Lamarck, An. sans Vert., VI, 1819, p. 75. — * Desha yes, An. sans 

 Vert., 2d ed., VI, 1835, p. 538; 3d ed., II, 1839, p. 669.— * Hanley, Test. Moll., 

 1842, p. 208 ; * Bi v. Shells, 1843, p. 208. 



* My a nas Ida Eato-^, Zool. Text-Book, 1826, p. 218.— * Wood, Index Test.(Hanley), 



1856, p. 199, pi. I, Supp., fig. 4. 

 *Eurynea nasuia Agassiz, Shells of New Eug., 1851, p. 13; Arch, fiir Naturg., I, 



1852, p. 45. 

 '*Unio rostrata Valenciennes, Eec. Obs. Zool., II, 1833, p. 233, pi. Liii, tig. 3. 

 *Z7mio vaughanianus Sowerby, Conch. Icon., XVI, 1868, pi. lxi, fig. 308. 



St. Lawrence drainage; streams flowing into the Atlantic south to 

 North Carolina. 



(Group of LampsiUs suhrostratiis.) 



Shell elliptical to elongate, distinctly pointed behind, the point well 

 above the middle of the height, that of the female conspicuously 

 swollen at the posterior base and obliquely truncated behind; epider- 

 mis varying from olive to brown, generally more or less rayed and 

 slightly roughened; beaks not prominent, sculptured with fine, deli- 

 cate, parallel bars, which are somewhat looped in front and generally 

 descend obliquely behind; pseudocardinals usually compressed; nacre 

 bluish to purple. Animal with inner gills often more or less free from the 

 abdominal sac ; posterior base of mantle of female generally toothed. 



tLAMPSILIS SUBROSTRATUS Say. 



Unio stibrostratus Say, N. Harmony Diss., .Tan. 15, 1831; *Am. Conch., VI, 1834. — 



* Conrad, New F. W. Shells, 1834, p. 72.— *Ferussac, Guer. Mag., 1835, p. 

 26.— *L. W. Say, Terr, and Fluv, Shells, 1840, p. 7.—* Conrad, Pr. Ac. N. 

 Sci.Phila., VI, 1853, p. 258.— Kuster, Conch. Cab., 1861, p. 203, pi. Lxvm.— 



* Lewis, Pr. Ac. N. Sci. Phila., VIII, 1878, p. 273.— ^ Call, Am. Nat., XIIL p. 

 392.— *B. H. Wright, Check List, 1888.— *P.etel, Conch., Sam., Ill, 1890, 

 p. 168. 



* Unio nashrilUanus Lea, Tr. Am. Phil. Soc, V, 1834, p. 100, pi. xiv, fig. 43; 



"Obs., I, 1834, p. 212, pi. xiv, fig. 43.— *Ferussac, Guer. Mag., 1835, p. 29.— 

 *Hanley, Test. Moll., 1842, p. 193 ; Biv. Shells, 1843, p. 193, pi. xxiii, fig. 31.— 



* Catlow and Reeve, Concb. Nom., 1845, p. 61.-* Conrad, Pr. Ac. N. Sci. 

 Phila., VI, 1853, p. 252.— "Kuster, Conch. Cab. Unio, 1861, p. 224, pi. lxxvi, 

 figs. 1, 2.— Sowerby, Conch. Icon., XVI, 1866, pi. xxx, fig. 158.—* H. and A. 

 Adams, Gen. Rec. Moll.. II, 1857, p. 494.— *B. H. Wright, Check List, 

 1888.— * PiETEL, Conch. Sam., Ill, 1890. p. 160. 



' Conrad gives three figures under fig. 1. The first and second are U. fifth erianns; the 

 third is a female nasutus. 



