UST OF ILLUSTRATIONS. XI 



PAGB 

 ■Griffithides glohiceps, Portl. ; Carboniferous Limestone, Ireland 77 

 -Phillipsia Eichwaldi var. mucronata, M'Coy ; Carboniferous 

 Limestone Shale, Muirkirk ... ... ... ... ... 77 



-Phillipsia Derbiensis, Martin ; Carboniferous Limestone, Derby- 

 shire ... ... ... ... ... ... ... ••• 77 



-Fterygotus anfflicus, Ag. (under-side) ; Old Red Sandstone, 



Forfarshire 77 



-Limulus poli/phemus, La,tT. ; Eecent, North America 78 



-Falcega Carteri, H. "Woodw. ; Grey Chalk, Dover 80 



-^ga monophthaltna, Johnston (living) ; Moray Firth 80 



-1, Dromiliies, London Clay ; 2, Pal(eocorystes, Gault ; 3, Eryon, 

 Jurassic ; 4, Mecocheirus, Jurassic ; 5, Cypridea, Wealden ; 

 6, Loricula, Chalk ... ... ... ... ... ... 81 



-CaZ?ia««5«a sMi<er?-«n(?a, Leach (living species) ... ... ... 82 



-Carapace of an Anthrapalcemon ; Coal-measures, Staffordshire ... 82 



 Falceinachtis longipes, H. "Woodw. ; Forest Marble, Great 

 OoHte, WUts 83 



-Rhaehiosoma bispinosa, H. Woodw. ; L. Eocene, Portsmouth ... 84 



-Tubes of Ortonia conica, Nich.^ growing upon the valve of 

 Rafinesquina alternata ; Ordovician ... ... ... ... 86 



-Or^o»i« iw^^-m^c?ia, Nich. ;, Devonian, Canada ... 86 



-a, Spirorbis omphalodes, Goldf. ; b and c-, Spirorbis Arkonensia, 

 Nich. Devonian: Arkona, Canada 87 



-Falaechinus ellipticus, M'Coy ; Carboniferous limestone, 

 Ireland 92 



-JSemicidaris intermedia, Lamk., sp. ; Corallian Oolite, Calne, 

 Wilts (nat. size) 93 



-Upper surface of Micraster cor-anguinum, Leske ; U. Chalk, 

 Bromley, Kent 94 



-Section of a ray of a starfish, Asterias [Vraster) rubens, Linn., sp., 

 showing the arrangement of the calcareous ossicula ... ... 95 



-a, Palceasterina stellata, Billings (under surface) ; b, Palteasterina 

 jpriwicvo, Forbes (upper surface) ... ... ... ... 96 



-Lapworthura Miltoni, Salter, sp. ; L. Ludlow rock, Leintwardine, 

 Shropshire 97 



-Restored figure of Botryocrinus decadactylus,, Bather, from the 

 Wenlock Limestone 99 



-Restored figure of Lepadocrinus quadrifasciatus, Pearce, sp., 

 from the Wenlock Limestone 101 



-Restored figure of Orophoerinus fusiformis, Wachs. and Spring., 

 from the Carboniferous (Kinderhook) of Iowa, U.S.A. ... 101 



-Placocystis Forbesianus, De Kon. ; Wenlock Limestone, Dudley 102 



-Syringolites Huranensis^ Hinde ; Niagara Limestone (Silurian), 

 Manitoulin Island, Ontario, N. America 105 



-The "chain-coral," Halysites catenularia, Linn.; Wenlock 

 Limestone, Silurian, Dudley 106 



-Omphyma subturbinafa, D'Orb. ; Wenlock Limestone, Dudley 

 (Prestwich's Geology) 106 



