NO. 1205. SYXOPSIS OF THE NAIADES— SIMFSOX. 557 



tLAMPSILIS KIRKLANDIANUS S. H. Wright.' 



* Unio IcirUandianus S. H. Wright, Nautilus, X, 1897, p. 136. 



" Lampsilis kirklandianus Simpson, Pr. Ac. N. Sci. Phila., 1900, p. 76, pi. i, iij;-. 7. 



Ocklockiiee river, Leou County, Florida. 



(Group of Lampsilis ellipsiformis.) 



Shell elliptical, subiuflated, pointed behind, that of the female but 

 slightly swollen at the post base; behind this inflation there is a slight 

 sinus; beak sculpture doubly looped, the hinder loop sometimes open 

 behind; epidermis dull, rayed with wavy lines, generally arranged in 

 bands; nacre white. 



Animal with the marsupium colored below; gills large, inner wholly 

 united to or only free irom the abdominal sack a short distance. 



tLAMPSILIS ELLIPSIFORMIS Conrad. 



* Unio ellipsiformis Conrad, Monog., YIII, 1836, p. 60, pi. xxxiv, fig. 1. — *B. H. 



Wright, Check List, 1888. 



* Unio spatuJatns Lea, Pr. Am. Phil. Soc, lY, 1845, p. 164; *Tr. Am. Phil. Soc, 



X, 1848, p. 80, pi. VIII, fig. 22; * Obs., IV, 1848, p. 54, pi. viii, fig. 22; Pr. Ac. 

 X. Sci. Phila., VI, 1853, p. 257.— *H. and A. Adams, Gen. Rec. Moll., II, 1857, 

 p. 495. — * KusTER, Conch. Cab. Unio, 1861, p. 261, pi. Lxxxvii, fig. 7. — 

 *" Calkins, Pr. Ottawa, Ac. Sci., 1874, p. 45.—" B. H. Wright, Check List, 

 1888.— * P^ETEL Conch. Sam., Ill, 1890, p. 168. 



* Margaron ( Unio) spatulaius Lea. 



* Lampsilis spatulatus Baker, Moll. Chicago, Pt. 1, 1898, p. 106, pi. x, fig. 5; xiii, 



fig. 2. 



Upper Mississippi Valley generally; south to about latitude 38°; 

 western IsTew York ; southern Michigan; southern Canada; Eed Eiver 

 of the North. 



tLAMPSILIS PLEASII Marsh. 



* Unio pleasii Marsh, the Observer (a newspaper), II, May, 1891; Nautilus, V, 



1891, p. 2. 



Little Red Eiver, Arkansas; Morrisville, Polk County, Missouri. 



tLAMPSILIS ARKANSASENSIS Lea. 



*Unio arkansasensis Lea, Pr. Ac. N. Sci. Phila., VI, 1862, p. 169; *J1. Ac. N. Sci. 

 Phila.,V, 1862, p. 206, pi. xxx, fig. 275; ^"Obs., IX. 1863, p. 28, pi. xxx, fig. 275.— 

 *B. H. Wright, Check List, 1888. 



Hot Springs, Arkansas; Saline Eiver near Benton, Arkansas. (Call.) 



tLAMPSILIS OZARKENSIS Call. 



""Unio ozarkensis Call, Pr. U. S. Nat. Mus., X, 1887, p. 498, pi. xxvii, — "B. H. 

 Wright, Check List, 1888.— -^Call, Tr. Ac. Sci., St. Louis, VII, 1895, p. 33, pi. 



XVIII. 



Jack's Ford of Current Eiver, Missouri; White Eiver, Arkansas. 



' A lovely, brilliant little species, nearly allied to suhangulatus, but probably 

 distinct. 



