•6o University of Michigan 



description of the color of the epidermis: blackish-brown. 

 The Ohio form is pure black or greenish-black. 



Rafinesque's latissima is well described, the elongated shape, 

 black epidermis, and large size being mentioned, and undoubt- 

 edly refers to the Ohio form. U . sageri thus becomes a syno- 

 nym of recta, which is the main species, and latissima is the 

 variety. 



Lampsius anodontoides (Lea), 1831 



Type locality: teres, Wabash River; anodontoides, Missis- 

 sippi, Alabama, and Ohio rivers. 



Unio teres Rafinesque, '20, p. 321. 



Unio anodontoides Lea, '31 (not '34, as Simpson gives), p. 81, pi. 8, 

 f. II. 



Unio teres B^^i.^^ anodontoides Lea, Conrad, '34, p. 72; Ferussac, 

 '35, P- 27; Conrad, '2^, P- 52, pL 28 (Poulson's "type" examined and 

 figured). 



U. teres Raf., Call. '00, p. 452. 



I^mpsilis anodontoides (Lea), Simpson, '14, p. 90, and L. fallaciosa 

 (Smith) ('99) Simpson, '14, p. 92. 



Lampsilis anodontoides (Lea) = U. teres Raf., Utterback, '16. p. 

 179, foot-note. 



"Whether the Unio teres Raf. was based upon specimens of 

 U. anodontoides Lea or Lamp, fallaciosa Smith is a question 

 upon which authorities of equally good judgment have held 

 opposing views and where certainty does not seem attainable. 

 Conrad's figure, said to be from a specimen labelled by Rafin- 

 esque, is anodontoides; but it is larger than Rafinesque's meas- 

 urements, therefore not the original type. It has been lost. 



"Rafinesque's type measured 'enznron' L. 75, H. 30, D. 50 

 mm. The nearest specimen now measured is, L. 78, H. 33, 

 D. 24 mm. In the most obese examples of either species the 

 height still surpasses the diameter, which in Rafinesque's shell 

 was said to be far greater than in any specimen of either spe- 

 cies mentioned. 



