﻿I,AMPSIIJS o , 



ing: in a slight sinus ; growth lines fine and rather even • surface 

 dull to shining; pale greenish-yellow with much broken rays 

 forming a concentric row of square spots around the upper 

 part of each season's growth; lunule small, narrow; let valve 

 with two small, nearly equal, erect pseudocardinals and two 

 delicate, straight laterals; right valve with one pseudocardinal 

 and a minute tooth in front of and another behind it with a 

 single lamellar lateral; beak cavities quite shallow, with a row 

 of small dorsal scars; muscle scars well impressed; nacre 

 sdvery or lurid. The female shell seems to differ but little 

 from that of the male ; it has a wide, slight marsupial swelHng- 

 both are rounded oi- feebly biangulate posteriorly. 

 Length 60, height s^, diam. 15 mm. 

 Type locality. Harpeth River, Tennessee. 

 Unio pictus Lea. Tr. Am. Phil. Soc, V, 1834, p. y^, p]. xi fig 

 7,2 ■ Obs., I, 1834, p. 185, pi. XI. fig. 32.— Ha'nlby, Biv." 

 Shells, 1843. P- 191, Pl. XXIII, fig. 35._K,,s<rER. Conch. Cab. 

 Umo, 1861, p. 249, pl. Lxxxiii, fig. 5. 

 Margarita (Unio) pictus Lka, Syn., 1836, p. 24; 1838, p. 19. 

 Margaron (Unio) pictus Lea, Syn.. 1852. p. 27: 1870! p. 43. 

 Lampsilis pictiM Simpson, Syn., 1900, p. 542. 

 Eurynia (Micrornya) picta Ortmann, Ann. Car. Mus., VIH, 

 1912, p. 342. 



Unio lindsleyi Lea. Pr. Ac. N. Sci. Phila., R\ i860, p. 306 ; Jl. 

 Ac. N. Sci. Phila., i860, p. 351, pl. i,viii, fig. 176; Obs., VIIL 

 i860, p. 2,Z, pl. LViii, fig. 176.— SowERBY, Conch. Icon., XVI,' 



1866, pl. XLII, fig. 233/7. 



Margaron (Unio) lindsleyi Lua. Syn.. 1870. p. 43. 

 Unio camelopardalis Sowerby, Conch. Icon., XVI, 1866, pl. 

 xui, fig. 2330. 



Very close to t<rniata, and it may be only a variety of that, 

 but it is more compressed, more evenly rounded posteriorly^ 

 and the color pattern is quite dififerent, consisting of square 

 blotches— broken rays—arranged in concentric rows at the be- 

 ginning of each year's growth. The type, a larger shell than 

 Lea's largest specimen, is probably in the Troost collection. 



