

PLATE IX 



LOWER PALAEOZOIC FOSSILS 



FIG. i. Didymograptus murchisoni. Llandeilo, Abereiddy. 

 FIG. 2. Monograptus sedgwicki. Llandovery, near Girvan. 

 FIG. 3. Strombodes typus. Wenlock Limestone, Much Wenlock. 

 FIG. 4. Favosites gothlandica (longitudinal . section). Wenlock Lime- 

 stone, Presthope, Salop. 



. 

 FlG. 5. Halysites catenularia. Wenlock Limestone, Much Wenlock. 



FIG. 6. Dendrocystis scoiica (after Bather). Caradocian, 



FIG. 7. Cyathocrinus sp. Wenlock Limestone, Much Wenlock. 



FlG. 8. l.ingulella davisi. Cambrian, Tremadoc. (Partly based on 

 Davidson's figure. ) 



FlG. 9. Orbiculoidea rugata. Upper Ludlow, Onibury, Salop. 



FIG. 10. " Orthis" (? Dalmanella) testudinaria. Caradocian, Marsh- 

 brook, Salop. Restored from casts and moulds (see PI. vi. 

 Fig. 2). 



FIG. II. Strophomena expansa. Caradocian, Soudley, Salop. Restored 

 from mould of ventral valve (partly based on Davidson's 

 figure). 



FIG. 12. Chonetes striatella. Upper Ludlow, Onibury, Salop. 



