TRITOGONIA TUBERCULATA MUDDLE 189 
The names hitherto applied are: 
(1) Umio tuberculatus Barnes, 1823. 
(2) Tritogonia tuberculata (Barnes) Simpson, 1900. 
(3) Quadrula tuberculata (Barnes) Ortmann, 1911. 
(4) Umi verrucosus Say, 1834. 
(5) Tritogonia verrucosa (Rafinesque) Agassiz, 1852. 
(6) Tritogonia verrucosa (———\) H.M. Smith: 1899. 
(6) Quadrula verrucosa (Say) Geiser, 1911 (Combinatio hypo- 
thetica). 
(7) Unio pustulata Swainson, 1840. 
non Unio pustulatus Lea, 1834. 
(8) Umno gigas Sowerby, 1867. 
(9) Quadrula obesa (Simpson) Vanatta, 1910. 
(10) Quadrula Parkeri Geiser, 1911. 
1. UNIO TUBERCULATUS Barnes, 1823, Am. Journal Sci., 
Wise 125) pl NI, igs“ Sar 8b, 
Agassiz,’ 1852, transferred the species to the genus Tritogonia 
of Agassiz as Tritogonia verrucosa (Raf.) Agassiz. Simpson’ trans- 
ferred the species also to the genus Tvitogonia, employing, however, 
the specific name ¢wberculata for reasons that will be shown under 
romen 4. 
2. ‘TRITOGONIA TUBERCULATA (Barnes) Simpson, 1900, Proc. 
Gs 'S.-Nat! Mus. X Xih- 608: 
Researches since carried on independently by Sterki® and 
Ortmann* show that Tritogonia has no standing as a genus, but 
groups rather with Quadrula apiculata, as shown by Pilsbry’ 
and confirmed by von Ihering’ and Ortmann.’ These facts have 
compelled Ortmann® to transfer the species to that genus. 
3. QUADRULA TUBERCULATA (Barnes) Ortmann, 1911, Mem. 
Carnegie Mus. IV.: 340. 
Simpson in his synopsis" transferred the species described 
Archiv fur Naturgeschichte, Jahrg., Bd. I.: 48. [1852.] 
Proc: U.S. Nat. Mus, X2c1l: 608.5 [1900.] 
Nautilus XXI.: 48. [1907]. 
Mem. Carn. Mus. IV.: 329. [1911.] 
Nautilus V.: 76. [1891]. bids 24V.- > 36. [room| 
An, Carn. Mus. V.: 193. [1909]. 
Mem. Carn. Mus. IV.: 340. [rorr]. 
Proc. U. S. Nat. Mus. XXII.: 795. [1900]. 
oon oo FP OO DD 
