REPORT OF THE DIRECTOR I 9 I 6 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 .... Allonema, Ascodictyon, Chilotrypa, Eridopora, 



Hemitrypa, Meekopora, Acanthoclema 



Silurian — Permian Fistulipora, Polypora, Thamniscus, Batosto- 



mella, Cystodictya, Dichotrypa, Coseinium, 

 v Fenestella, Pinnatopora, Phyllopora 



Triassic — Recent Ceriopora 



Jurassic — Tertiary Diastopora, Fasciculipora, Theonoa 



Jurassic — Recent Entalophora, Heteropora, Idmonea, Licheno- 



pora, Spiropora, Crisina, Membranipora, 

 j ! ; ( ; Onychocella 



Cretaceous — Recent Crisia, Filisparsa, Phalangella, Actinopora, 



Eucratea, Cyrtopora, Reticulipora, Dis- 

 cocavea, Hornera, Cribrilina, Lepralia, 

 Lunulites, Floridina, Smittipora, Micropora, 

 Membraniporella, Porina, Selenaria, Schizo- 

 ••' i 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, Seminula 



Carboniferous — Jurassic .... Spiriferina 



Triassic — Cretaceous Aulacothyris 



Jurassic — Recent Acanthothyris, Lacazella, Magellania, Mega- 



thyris, Muehlfeldtia, Terebratella, Terebra- 

 ' P~1 tulina 

 Cretaceous — Recent Agnlhasia Argyrotheca 



The persistent types among the Pelecypoda are: 



Ordovician — Devonian Cleidophorus 



Ordovician — Carboniferous . . Pterinea 



Silurian — Carboniferous Aviculopecten, Cardiomorpha 



Silurian — ■ Jurassic Posidonomya 



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



recent species) 



