Swartz 1936,p.555; Primitiidae-Primitiopsinae by 
Hessland 1949,p.239; Eurychilinidae-Primitiopsiinae 
by Henningsmoen 1953,p.268] Silurian, Gotland. 
PRIONOCYPRIS [Candona serrata Norman 1862a,p.46,pl.2,f.1-6; 
1862b,p.146,pl1.3,f-l-6 = Cypris zenkeri Chyzer 
and Toth, in Chyzer, 1858,p.514, by Lowndes 1931, 
p.-93-97, who redefines genotype] Brady and Norman 
1896 ,p.72k. 
PRIONOCYTHERETTA [P. prima] Méhes 1941,p.60 [= Cytheretta by 
Triebel 1952, p16] Oligocene, Hungary. 
PROCYTHERIDEA [{P. exempla] Peterson 1954,p.171, Cytheridae, 
near Haplocytheridea, and Protocythere by Peterson). 
Jurassic, Wyoming. 
PROCYTHEREIS [Cythereis (Procythereis) torquata] Skogsberg 
1928,p.e17 [a subgenus of Cythereis by Skogsberg] 
Recent, Tierra del Guego. 
PROGONOCYTHERE [(P. stilla] Sylvester-Bradley 1948b,p.189 
[ Cytheridae-Progonocytherinae by S-B] Jurassic, 
England. 
PROGONOCYTHERINAE Sylvester-Bradley 1948b,p.189, a subfamily 
of Cytheridae to include Progonocythere and Lopho- 
cythere. 
155 
