BURSULLELA [B. triangularis] Jones 1887,p.7; 1888a,p.409, 
pl.22,f.5,6. (Primitiidae by Bassler & Kellett 
1934,p.223; Leperditellidae by Swartz 1936,p.550; 
?Aparchitidae by Schmidt 1941,p.18.] Silurian, 
Island of Gotland. 
BYTHOCERATINA [B. mestayerae] Hornibrook 1952,p.62 
[Cytheridae-Bythocytherinae by Hornibrook] Recent, 
New Zealand. 
BYTHOCYPRIS [Bairdia bosquetiana Brady 1866,p.364,pl.57 = 
the young of Bythocypris reniformis Brady 1880, 
pe46,pl1.5,f.la-1] Brady 1880,p.45 [Cypridae by 
Brady; Nesideidae by Muller 1912,p.249; Bairdiinae 
by Sars 1923,p.63; Bairdiidae by most subsequent 
authors] Recent, Atlantic Ocean. 
BYTHOCYPROIDEA [B. sandyskyensis] Stewart and Hendrix 1945a, 
pe9l {Bairdiidae by S&H.] Devonian, Ohio. 
BYTHOCYTHERE [B. turgida Sais 1866, designated by Brady and 
Norman 18689,p.220] Sars 1866,p.82 [Cytheridae-- 
Bythocytherinae by Sars 1926,p.232-233] Recent, 
North Atlantic. For shell structure see Sylvester-- 
Bradley 1948c. 
BYTHOCYTHERINAE Sars 1926,p.232-233, subfamily of Cytheridae, 
for genera Bythocythere, Pseudocythere, Macrocythere. 
25 
