PLATYCHILINA Kummerow 1933,pe45 [Primitia distans Krause 
figured as a Platychilina, p.44, but not desig- 
nated ] e 
PLATYCHILINA [Primitia elongata Krause 1891,p.494,p1.30, 
fe4a,b] Kummerow 1939,pe19 [Primitiidae-Eury- 
chilininae by Kummerow; Not Platychilina Koken 1892, 
by Agnew 1944,p.219]) Ordovician to Permian by 
Kummerowe 
PLATYCHILUS [P. ovoides] Cooper 1941,p.38 [Cytherellidae by 
Cooper; not Platychilus Jakolev 1874 = Platychilejla 
Cooper 1942,p.777] Mississippian of Illinois. 
PLATYCOPA Sars 1866,p.124 for the family Cytherellidae and 
genus Cytherella. Triebel 1950b,p.117, adds the 
Healdiidae to the Platycopa. 
PLATYCYTHEREIS [Cythereis excavata Chapman and Sherborn 1893, 
pe 348,pl.14,f.8] Triebel 1940,p.214 [Cytheridae-- 
Cytherinae by Triebel] Cretaceous, England. 
PLEOSCHISMA [P. robusta, P. moroides, P. reticulata] Brady 
1890,p.513 [Cypridinidae by Brady; = Philomedes by 
Ge We Miiller 1912,p.25; certainly valid genus: 
Cypridinidae-Philomedinae by Skogsberg 1920, 
pe348) Recent, South Pacific. 
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