REPORT OF THE DIRECTOR I916 III 



Some remarkable ranges are cited among the Bryozoa, namely: 



Ordovician — Devonian Corynotrypa, Ceramopora, Discotrypa, Erido- 



trypa, Hallopora, Monotrypa, Monotrypella, 

 Pseudohornera, Petalotrypa 



Ordovician — Carboniferous ..Lioclema, Rhopalonaria, Vinella, Heteronema 



Ordovician — Permian. ....... .Rhombopora 



Ordovician — Recent! Berenicea (culminates Jur.-Cret.) 



Stomatopora, Proboscina 



Silurian — Carboniferous .... AUonema, Ascodictyon, Chilotrypa, Eridopora, 



Hemitrypa, Meekopora, Acanthoclema 



Silurian — Permian Fisitulipora, Polypora, Thamniscus, Batosto- 



mella, Cystodictya, Dichotrypa, Coscinium, 

 y Fenestella, Pinnatopora, Phyllopora 



Triassic — .Recent '. . . . Ceriopora 



Jurassic — Tertiary Diastopora, Fasciculipora, Theonoa 



Jurassic — Recent ... Entalophora, Heteropora, Idmonea, Licheno- 



pora, Spiropora, Crisina, Membranipora, 

 Onychocella 



Cretaceous — Recent Crisia, Filisparsa, Phalangella, Actinopora, 



Eucratea, Cyrtopora, Reticulipora, Dis- 

 cocavea, Hornera, Cribrilina, Lepralia, 

 Lunulites, Floridina, Smittipora, Micropora, 

 Membraniporella, Porina, Selenaria, Schizo- 

 ; i porella, Smittina, Mucronella, Porella 



Among the Brachiopoda we find : 



Ordovician — Devonian Dalmanella, Glassia, Scenidium, Atrypa, Atry- 



pina, Schizocrania 

 Ordovician — Carboniferous ..Leptaena, Pholidops, Rhipidomella 



Ordovician — ■ Permian Chonetes 



Ordovician — Cretaceous .... Orbiculoidea 



Ordovician — Recent Crania, Lingula (two maxima of Crania, one 



in Ordovician, another in Cretaceous) 

 Silurian — Carboniferous .... Schizophoria, Schuchertella, Camarotoechia, 



Wilsonia, Cyrtina, Nucleospira, Spirifer 



Devonian — Permian Dielasma, Strophalosia, Seminnla 



Carboniferous — Jurassic . . . . Spiriferina 



Triassic — Cretaceous Aulacothyris 



Jurassic — Recent Acanthothyris. Lacazella. Magellania, Mega- 



thyris, Muehlfeldtia, Terebratella, Terebra- 



tulina 

 Cretaceous — Recent Agulhasia Argyrotheca 



The persistent types among the Pelecypoda are : 



Ordovician — Devonian Cleidophorus 



Ordovician — Carboniferous . . Pterinea 



Silurian — Carboniferous Aviculopecten, Cardiomorpha 



Silurian — • Jurassic Posidonomya 



Silurian — Recent ! Lcda, Nitcida (over 200 fossil and as many 



recent species) 



