EXPLANATION OF PLATE h D. 



LOWER PALAEOZOIC ECHINODERMATA AND ANNUL AT A. 



1 TAXOCRINUS ORBIGNII (M-'Coy). From High Thorns, Underbarrow, natural size. 



2 EUCALYPTOCRINUS POLYDACTYLUS (M<=Coy). Natural size, from Dudley. 



3 ACTINOCRINUS PULCHER (Salt). Part of large slab, from Nanfc-gwehwyd Uchaf, S. of LlangoUen ; 



natui-al size, shewing three perfect cups with their rays, attached to then- columns, and some portion 

 of the older columns. 



4 GLYPTOCRINUS BASALIS (M<^Coy). Natural size, from the schists of Alt y Anker. 



5 CARYOCYSTITES DAVISI (M-^Coy). Side view of specimen, natural size, from Coniston. 



5 a Front view of ditto. 



6 Undetermined Cystidean, natural size, from Coniston. 



7 TETRAGONIS DANBYI (Salt sp.). From the Upper Ludlow Rock of Brigsteer, natural size. 



7 a Portion of ditto, magnified four diameters. 



8 Larger specimen, natural size. 



9 Undetermined fossil, common in the Upper Ludlow rock of Kendal, shewing the hemispherical upper 



surface, and flattened base, with what seems a pedicle of attachment. 

 9 a Portion of surface magnified. 



10 TRACHYDERMA? L^VIS (M>=Coy). From the fine Caradoc Sandstone of Acton Scot, natural 



size, and section. 



11 SERPULITES DISPAR (Salt). Natural size from N. end of Benson Knot. 



12 Ditto. 



13 MYRIANITES TENUIS (M-^Coy). From the slate of Greiston, on Tweed, natural size. 



14 CROSSOPODIA LATA (M^Coy). Fragment, natural size, from the Tilestone of Storm HiU, Llandeilo. 



15 CROSSOPODIA SCOTICA (M-'Coy). From the slates of Thorny Lee, on the Tweed, natural size ; 



the narrow markings being the trails left by the worms, the broader portions containing the body 

 and fringe -like cirri, perfect. 



