Occasional Papers of the Museum of Zoology 61 



"As stated above, the method of 'correcting'' an author's 

 measurements to force them to agree with what species we 

 will is essentially unscientific. It savors of mediaeval theolog- 

 ical procedure. If great dependence is placed upon these pro- 

 portions in some cases, why throw them away when they do 

 not suit our convenience ? In the case of Unio teres, its adop- 

 tion would mean the rejection of certainties for a name resting 

 on a description requiring arbitrary alteration, and after that, 

 practically arbitrary selection between two closely related 

 forms. U. teres should be discarded as not identifiable." (H.. 

 A. P.) 



Lampsius siuquoidea (Barnes), 1823 

 Type locality: Wisconsin River. 



Unio lutcola Lamarck, '19, p. 79. 



Unio fasciata Rafinesque, '20, p. 294. 



Lampsilis fasciola Rafinesque, '20, p. 299. 



Unio inflatus Barnes, '23, p. 266. 



Unio siliquoideus Barnes, '23, p. 269, pi. 13, f. 15. 



U. cariosus Say, '17= U. luteola Lam., Lea, '29. p. 417-425; Conrad^ 

 '34, p. 68; Ferussac, '35, p. 26. 



U. siliquoideus Bar. = U. inflatus Bar., Lea, '29, p. 419; Conrad, '36^ 

 pp. 23-40. 



U. inflatus Bar. = U. siliquoideus Bar., Conrad, '34, p. 69. 



U. lutcola Lam. = L^ siliquoideus Bar., Lea, '34, p. 91 (type exam- 

 ined). 



U. fasciata Raf. = f '. carinatus Bar., '23, Conrad, '34, p. 69; '35, p. 



3, Pl- I- 



U. fasciolus Raf. = U. multiradiatus Lea, '29, Conrad, '36, p. 26, 

 pl. II, f. 2.(Poulson's specimen examined). 



U. siliquoideus Bar. = U. inflatus Bar., Conrad, '36, p. 22, pl. 9, f. i. 



Lampsilis luteola (Lam.), Simpson, '14, p. 60. 



Lamp. lutcola (Lam.) = Z,. fasciata Raf., Vanatta, '15, p. 551 ("type" 

 examined). 



U. fasciata Raf. = U. siliquoideus Bar. = U. luteolus Lam. (of 

 authors), Frierson, '19, p. 139. 



Of the names applied to this form, the oldest is luteola Lam. 

 According to description and locality this has been referred to 



