THLIPSURIDAE of Ulrich and Bassler 1923,p.316, is placed in 
the Cypridacea with the following genera: 
Thlipsura, Octonaria, Phreatura, Craterellina. 
THLIPSURIDAE of Henningsmoen 1953,p.260,261, which he 
considers related to the Quasillitidae, Healdiidae, 
and possibly the Bairdiidae, with the genera 
Bucraterellina, Eustephanella, ?Favullela, 
Hyphasmaphora, Octonaria, Octonariella, ?Ranapeltis, 
Rothella, ?Stibus, Strepulites, Thlipsura, Thlip- 
surella, Thlipsurina, Thlipsuroides. 
THLIPSURINA [T. elongata] Bassler 1941,p.26 [Thlipsuridae by 
Bassler; Kloedenellidae by Swain 1953,p.276] 
Devonian, Tennesseee 
THLIPSURINA [Thlipsura tetragona Krause 1891,p.508,pl.32, 
f.15] Kummerow 1953,p-49 [Thlipsuridae by Kummerow; 
not Thlipsurina Bassler 1941] Silurian drift, 
Germanye 
THLIPSUROIDES [T. thlipsuroides] Morris and Hill 1952,p.10 
[Thlipsuridae by M&H] Silurian, Tennessee. 
THOMASATIA [T. falcicosta] Kay 1934,p.337 [Zygobolbidae by 
Kay; Tetradellidae by Swartz 1936,p.55l; Bey- 
richiidae-Piretellinae by Kay 1940a,p.266; 
Drepanellidae-Bassleratiinae by Schmidt 1941l,p. 
50; Tetradellidae by Agnew 1942,p.760; Tetradellidae-- 
Bassleratiinae by Henningsmoen 1953,p.267] Ordovician, 
Ontario.e 
185 
