48 University of Michigan 
Unio fasciata Rafinesque, ’20, p. 204. 
Unio ellipticus Barnes, ’23, p. 259, pl. 13, f. 19 (not U. elliptica 
Rat. |°20): 
Unio carinatus Barnes, ’23, p. 259, pl. 11, f. Io. 
U. ligamentina Lam. = U. crassus Say, Lea, ’34, p. 88 (type exam- 
ined). 
U. fasciatus Raf.=U. carinatus Barn., Conrad, 734, p. 69; 735, p. 
Sy lk, at 
U. crassus Say = U. carinatus Barn., Ferussac, ’35, p. 27, 33. 
Lampsilis ligamentina (Lam.), Simpson, ’14, p. 79. 
U. crassa (Say), .Raf.=U. fasciata Raf.=—U. pallens Raf., ’°31= 
Lamp. ligamentina (Lam.), Vanatta, *15, p. 551 (“types” examined). 
U. fasciata Raf. = U. siliquoidea Bar., ’23 = U. luteolus auct., Frier- 
Son; “10; (1p. 130: 
Actinonaias ligamentina (Lam.), Ortmann, ’19, p. 232. 
U. crassus and U. ellipticus are nomina preoccupata. U. 
ligamentina is absolutely unrecognizable (the description could 
not possibly be poorer), and so is U. fasciata, which might be 
this or fasciolaris Raf. and even U. siliquoidea Barn., accord- 
ing to Frierson (see under L. siliquoidea), ‘The description 
applies to both and the so-called Rafinesque-Poulson “type”’ 1s 
the so-called ligamentina. It might also be any other species 
with elliptical outlines and with rays (iris group). 
The first valid name (recognizable and not preoccupied) 
under which the present species was published is carinatus 
Bar., and a good figure of this has also been given. The deter- 
mination of the type of U. ligamentina Lam. by Lea was sub- 
sequent to this, and thus has no effect. 
ACTINONAIAS PECTOROSA (Conrad), 1834 
Type locality: Elk River, near its junction with Tennessee,. 
Northern Alabama. 
Unio vittatis Rafinesque, *31, p. 2. 
Unio pectorosus Conrad, ’34 (May), p. 37, pl. 6, f. 1. 
Unio perdix Lea, ’34 (August or September) (not ’27 as given by 
Simpson), -—p./ 72, “pl. 11, Hi. 31: 
U. pectorosus Con., ’34 (May),=U. perdix Lea, ’34 (September),. 
Conrad 30; pes) ple ll, tet 
