﻿;l6o I.AMI'SIIJS 



lATiiif>silis piiulus Si.Mi'SON, Syii., 1900, p. 566. 



Eurynia (Carunculina) paula Ortmann, Ann. Car. IVIus., 



VI II, 19 1 2, p. 339. 

 Unio corvinns Ij:a, Pr. Ac. N. Sci. IMiila., Xll, 1808, p. 144; 



Jl. Ac. N. Sci. IMiila., VI, 1869, P- 3'o> p'- xi:.viii, fig-. 123: 



Obs., XII, 1809, p. 70, pi. xr.viii, fig. 123. 

 Margaron (Unio) coninus Lka, Syn., 1870, p. 49. 



The type of Lea's patilus is a male shell and that of his 

 corT/inus is a female of the same species. The post-basal swell- 

 ing of the female scarcely projects below the base line of the 

 shell, but it is angular and this with the peculiar radial ridge 

 leading- over it as well as the sudden thickening of the front 

 part of the shell are good distinguishing characters. The male 

 shell is much like that of L. germana, but is solider, more in- 

 flated and darker. 



Lampsii.is pulla (Conrad). 



Shell long elliptical or subrhoniboidal, subinflated, especially 

 at the center, rather solid ; dorsal and ventral lines almost par- 

 allel ; beaks moderately full, but not high, eroded in the speci- 

 men figured ; epidermis dark olivaceous ; left valve with two 

 pseudocardinals and two laterals ; right valve with one pseudo- 

 cardinal and one lateral ; nacre chocolate-purple, iridescent be- 

 liind ; beak cavities capacious. 



Length 2>^, height 17, diani. 12 mm. 



Type locality, Wateree River, South Carolina. Also, Warm 

 Springs, North Carolina. 

 Unio pullus Conrad, Monog-., XI, 1838, p. 100, pi. liv, fig. 2. — 



Ku.sTER, Conch. Cab. Unio, 1862, p. 270, pi. xci, fig. 2. 

 Margaron (Unio) pullus Lea, Syn., 1852, p. 31 ; 1870, p. 49. 

 Lampsiiis pullus Simpson, Syn.. i()oo, p. 566. 



In form this is a good deal like L. nia^sta, being obliquely 

 truncated on the posterior slope and rounded at the posterior 

 basal-point. It is a smaller species, and. according to Conrad, 

 it must have a much darker nacre, which is iridescent behind, 

 while that of mcvsta does not seem to be. It differs froiu cyl- 

 indrella in being much darker, and in having uniformly purple 



