BEECHERELLIDAE Ulrich 1894,p.632; Ulrich & Bassler 1923, 
pe318. Ulrich included genera Beecherella and 
Krausella. 
BELLORNATIA [B. tricollis] Kay 1934,p.342 [Beyrichiidae by 
Kay 1934; Tetradellidae by Swartz 1936,p.551; 
Beyrichiidae-Piritellinae by Kay 1940a,p.265; 
Drepanellidae-Bassleratiinae by Schmidt 1941,p.50; 
Tetradellidae-Bassleratiinae by Henningsmoen 1953, 
pe219,267.] Ordovician, Iowa. 
BERNIX [Beyrichia tatei Jones 1864,p.87-89,fig.3] Jones 
1885a,pe319. [Kloedenellidae by Bassler & Kellett 
1934,p.-30; family uncertain by Henningsmoen 1953, 
pe273-] Carboniferous, England. 
BEROUNELLA [B. rostrata] Boucek 1936,p.65 [Beyrichiidae by 
Boucek; ?Beecherellidae by Agnew 19h2,p.757; 
Alanellidae by Henningsmoen 1953,pe273]. Silurian, 
Bohemiae 
BERTILLONELLA [B. subcircularis] Stewart and Henrix 1945b, 
pel0O [Leperditellidae by S&H] Devonian, Ohio. 
BEYRICHIA [B. kloedeni] M'Coy 1846,p.57 [Leperditiidae-Bey- 
richiinae by Jones 1901,pe147; Beyrichiidae-Bey- 
richiinae by Henningsmoen 1953,p.236,238,269. ] 
Silurian, Ireland. 
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