No.1205. svxnrsis or THE \.u.tiu-:ssiMi'*ox. 569 



KRBY, Conch. Icon., XVI, 1866, pi. XLI, fig. 228.* B. H. WRIGHT, Check 

 List, 1888. *P.KTKL, Conch. Sam., Ill, 1890, p. 151. 

 Margaron ( I'nio) dolnan* LEA, Syn., 1870, p. 61. 



Eastern Texas, north to Kansas, through southern Missouri, western 

 Tennessee, to the Alabama liiver drainage. . 



tLAMPSILIS PERMISCENS Lea. 1 



* 77nto permiscens LEA, Pr. Ac; N. Sci. Phila.. Ill, 1859, p. 112; Ml. Ac. N. Sci. 



Phila., V, 1862, p. 102, pi. xvn, fig. 251; * Obs., VIII, 1862, p. 106, pi. xvn, fig. 

 251 * B. H. WRIGHT, Check List, 1888. 

 " Marganm ( Unio) permiscens LEA, Syn., 1870, p. 61. 



Tombigbee River, Columbus, Mississippi. 



tLAMPSILIS GOULDII Lea. 2 



* Unio gouldii LEA, Pr. Am. Phil. Soc., IV, 1845, p. 165; * Tr. Am. Phil. Soc., X, 1848, 



p. 76, pi. vi, fig. 16; * Obs., IV, 1848, p. 50, pi. vi, fig. 16." CONRAD, Pr. Ac. N. 

 Sci. Phila., VI, 1853, p. 250. * H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 

 494. *B. H.WRIGHT, Check List, 1888. *P .KTEL, Conch. Sam., Ill, 1890, 

 p. 153. 



* Margaron ( Unio) gouldii LEA, Syn., 1852, p. 29; 1870, p. 46. 



Tuscaloosa, Alabama. 



(Group of Lampsilis saladoensis.). 



Shell smooth, obovate, inflated, inequilateral, rounded behind, thin, 

 slightly thicker in front; beaks somewhat prominent, nearly smooth; 

 epidermis yellowish olive, shining, rayed; there is a slight cariua high 

 up on the posterior slope; pseudocardinals small, lamellar, and oblique; 

 laterals lamellar and curved; anterior cicatrices distinct and well 

 impressed; posterior cicatrices confluent; dorsal cicatrices under the 

 plate, between the pseudocardinals and laterals; nacre bluish white 

 and iridescent. 1 ' Animal unknown. 



LAMPSILIS SALADOENSIS Lea. 



* Unio saladoensis LEA, Pr. Ac. N. Sci. Phila., IV, 1860, p. 305; Ml. Ac. N. Sci. 



Phila., IV, 1860, p. 370, pi. LXV, fig. 195; * Obs., VIII, 1860, p. 52, pi. LXV, 

 tig. 195. B. H.WRIGHT, Check List, 1888. * FISCHER and CROSSE, Miss. Sci., 

 Pt. 7, II, 1894, p. 586. 



* Margaron ( Unio) saladoennis LEA, Syn., 1870, p. 62. 



Kio Salado, New Leon, Mexico. 



1 There is only a single, young, poor specimen in the Lea collection, which may he 

 a valid species, but is quite likely a L. purpnratus. 



2 Only a single, dead, badly worn shell is in Lea's collection. It is something like 

 a young umbrosus, but if it really came from Tuscaloosa, Alabama, it probably belongs 

 to the Alatus group. I can not decide certainly as to its affinities. 



3 Mr. Lea states that a single specimen of U. saladoensis was collected by Dr. Ber- 

 landier and presented to the Smithsonian Institution by Lieutenant Couch (Obs. 

 VIII, p. 53). I have never found this shell, and have not seen the species, and am 

 somewhat at a loss as to where to place it, but the figure and description would 

 indicate that it is a young shell of a form related to purpuratus; its rays, which 

 Dr. Lea says are nearest to U. amygdalum, being different from those of any related 

 forms. 



