INDEX. 



327 



Diercwograptiis, 48 

 Didymograptus, 47 

 Diplograptus, 47, 50 

 Dissolution of spicules, II 

 Ditrttpa, 173 



Dudley limestone corals, 73 

 Dumfriesshire, graptolites of, 49 



E 



Earliest trilobites eyeless, 184 

 Echinodermata, inter-relations of 



different forms, 107 ; their young 



condition, 1 10 ; structure of, 144, 



146 ; of fossil, 147, 149 

 Echinozoa, 105 

 Echinus, 109 

 Eglwyseg corals, 87 

 Eifel Mountains, crinoids in, 126 

 " Encrinital limestone," 118 



marble, 120 



Encrinite, description of an, 112 

 Encrinites, 98 ; zoological position 



of, 99 ; living, 107 ; abundant, 



115, Il8, 120, 121, 122, 124, 

 127, 128 



effects of muddy water on, 1 1 5 



Primary, 115 



Secondary, 128 



Encrinus moniliformis, 128 

 Eozoon Canadense, 28 

 Estheria> 202 



Etheridge, Mr., on sponges, 19 ; on 

 Productus, 233 ; 



3*7 



E^^plectella aspergilhim, 1 1 

 Eurypterida, 201 



Fasciailaria aurantiutn, 221 

 Favosites, 79, 82, 84 

 Eeather-star, 107 

 Felixstowe, fossil lobsters at, 207 ; 



fossil shells at, 278 

 " Fire-stone," 25 

 " Five-fingers " star-fish, 132 

 " Flint-meal," 20, 23 



Flint nodules, formation of, 34 



Flints, sponges in, 20, 23 ; encri- 

 nites on, 123 



Fossil cephalopods, 296 ; folk-lore 

 of, 296 



worms, 158 



Fossils, abundance of, 3 ; doubtful 

 classification, 14 ; popular names, 

 26 



Foraminifera, 28, 29 ; in carboni- 

 ferous limestone, 30 ; in white 

 chalk, 30 ; to prepare, 50 



Fusulina limestone, 29 



Fusus contrarius, 289 



Gault echinoderms, 153 



fossils of, 263 



Gasteropoda, differentiation of, 242 



Girvan, corals at, 82 



" Glass-rope" sponge, 18 



Glyptocrinus, 124 



Goniaster, 132 



Goniatitts, in Yoredale shales, 1 1 6, 



Gonotheca, 41, 42, 44 



Graptolites, 38 ; zoological position 

 of, 40 ; structure of, 42 ; abun- 

 dant at, 50, 51, 52, 53 ; in shales, 



54 



Graptolithus, 47 



Gravel flints, sponges in, 27 



Greensand echini, 153 



fossil mollusca of, 263 ; lo- 

 calities for, 264, 265 



sponges in, 19, 25, 26 



H 



Hafod, corals at, 88, 89 

 Halysites, 78, 79, 84 

 Hampstead beds, fossils of, 276 

 Heliolites, 62, 78, 81, 82, 83 

 Hexactinellida, n, 12, 23, 24, 25 

 Hinde on sponge spicules, 19 

 Hopkinson on graptolites, 40, 41, 



46 

 Hunstanton, corals at, 94 



