l86 THE NAIADES OE MISSOURI 



Rivers was pronounced by Mr. Frierson as rosacea DeKay but not 

 exactly the author's shell from the St. Lawrence. Mr. Walker 

 comments: — "I do not remember of ever having seen a red-nacred 

 hiteola from the southwest. The Great Lakes form, rosacea DeKay, 

 is typically red or rather pink." 



Lampsilis reeviana (Lea). 



("Reeve's Shell.") 

 No/ figured nor described. 



1852 — Unio reevianiis Lea, Tr. Am. Phil. Soc, X, p. 272, pi. XX, fig. 28. 



This species is catalogued through a report of it for Clinton, 

 Missouri. The writer has not found it; hence no figure nor descrip- 

 tion appears here. Simpson reports this throughout the South- 

 west and hence the locality of this State, from which Mr. Walker 

 reports as having received his reeviana shell, is within the range. 



Lampsilis ventricosa (Barnes).' 



("Pocket Book.") 

 PI. XXVIII, Figs. 106 A—-D. 



1823 — Unio ventricosus Barnes, Am. Jl. Sci., VI, p. 267, pi, XIII, 



fig. 14. (in outline). 

 1900b — Lampsilis ventricosus Simpson, Pr. U. S. Nat. Mus., XXII, p. 



351- 



ANIMAL CHARACTERS. 



Nutritive Structures: — Branchial and anal opening papil- 

 lose; supra-anal large, closely connected to anal; inner laminae 

 of inner gills connected to visceral mass; palpi connected about 

 two-thirds of their length antero-dorsad, color of soft parts whitish 

 except foot which is pinkish and gills of male and sterile female 

 which are light brown, gravid marsupium darker brown, edged 

 in blue and black. 



Reproductive Structures: — Marsupium kidney-shaped con- 

 ' According to Vanatta, 1. c, (fgis, p. 551), Lampsilis ventricosus 

 Bar. (1823) of Simpson's Synopsis, p. 526, should read Lampsilis cardium 

 Raf. since this Species is unquestionably the Lampsilis cardium ( Unio 

 cardium) of Rafinesque's Monograph (1820), p. 298, No. 14, PI. 80, Figs. 

 16, 17, 18 and 19, as now identified from Types in the A. N. S. P. Coll., 

 No. 20, 210. 



