i6o 



INDEX 



Ktaoua Formation, Morocco 14 

 Kullervo 115 



panderi 116 



sp. 10, 20, 115-6 ; pi. 19, figs. 14-5 

 Kullervoidae 115-6 



lahars 21 

 Lenorthis 18, 52 



parvicrassicostatus 53 



proava 12, 53-4 



cf. proava 10-1, 17, 52-3, 55-7 ; pi. 8, 

 figs. 2-9 

 Leptaena 23, 148 



kjerulfi 149 



sericea 134 



cf. ventricosa 10, 14, 22-3, 148-9 ; pi. 27, 

 figs. 5, 8-9 

 Leptaenidae 148-50 

 Leptestiidae 126-7 

 Leptestiinae 126-7 

 Letna Formation, Bohemia 15-6, 88 

 Liben Formation, Bohemia 15 

 Lingula 19 



attenuata 31-2 



plumbea 38 

 Lingulacea 25-42 

 Lingulella 12, 18, 28, 31 



decorticata 31 



displosa 10, 19-20, 28-9 ; pi. 2, figs. 2-8 

 petila 10, 18, 29-31 ; pi. 2, figs. 9-11 ; 

 pl- 3- fig- 1 



lingulaeformis 31 



rideanensis 31 

 Lingulellinae 28-35 

 Lingulida 25-42 

 Linoporellidae 114-5 

 Llandeilo 12-3, 15*, 16 



Flags 13 

 Llandovery 16 

 Llanvirn 11 -2, 15*, 19 

 Longvillian 14 



Macrocoelia llandeiloensis 13 

 Mcewanella 78-81 



berwynensis 79 



sp. 10, 23, 78-9 ; pl. 13, figs. 3, 5 

 Meadowtown Beds 9-11, 12*, 13-4, 15*, 



19, 20, 21 

 Medesia 68-9 

 Monobolina 18-9, 38 



plumbea 10, 12, 17, 38-40 ; pl. 5, figs. 

 2-10 ; pl. 6, fig. 1 

 Morocco 8, 11, 13-4 



Murinella 141 



partita 141 



sp. 10, 20, 141 ; pl. 25, figs. 2-3 

 Mytton Flags 9- 11, 12*, 15*, 16, 17, 18 



Nant Hir Mudstones 14 

 Nicolella 14, 22, 57 



cf. actoniae 10, 14, 22-3, 57-60 ; pl. 9, 

 figs. 1-6 



actoniae obesa 58-9 

 Nocturniella 88 



nocturna 89 



sp. 10-1, 17, 88-9 ; pl. 14, figs. 17, 20 



Obolidae 11, 25-38 

 Obolinae 25-8 

 Obolus 18, 25 



? biconvex a 26 



? nitens 26 



subditivus 10, 18, 25-6 ; pl. 1, figs. 1-8 



sp. 10, 17, 26 ; pl. 1, figs. 9-10 

 Onniella 15, 21-2, 98 



ostentata 98-9 



lepida 10, 14, 22-3, 98-102; pl. 16, 

 figs. 9-14 



soudleyensis 99 



sp. 10, 21, 99 ; pl. 16, figs. 15, 18 

 Onychoplecia 126 

 Orbiculoidea 47-8 



sp. 10, 47 ; pl. 7, fig. 1 

 Orbiculoideinae 47-8 

 Ordovician 1-158 

 Orthacea, orthaceans 7, 49-86 

 Orthambonites 22, 24*, 53 



bellus 54 



calligramma 53, 55 



exopunctata 10, 23, 53-7 ; pl. 8, figs. 

 10-7 



friendsvillensis 54 



orbicularis 53 



playfairi 54 



cf. rotundiformis 55 



sp. 10, 22 

 Orthida 49-126 

 Orthidae 50-63, 68 

 Orthidina 49-115 

 Orthinae 50-7 

 Orthis 18, 50 



actoniae 57 



cf. callactis 10-1, 17, 50-1 ; pl. 7, figs. 

 10-1, 13-6 



calligramma 53 

 proava 52 



