BRITISH ASTEROIDEA AND OPHIUROIDEA. 



197 



Horizons of Jurassic species of Ophiuroidea ; 



Horizons of Palseozoic Asteroidea : 



from Middle Lias 

 Lower Lias 



Carboniferous 



Devonian 



Silurian 



Range of British fossil Echinoidea, Asteroidea, and Opliuiroidea, 

 Purbeck beds 



C Archaster 

 Arthraster 

 Asterias 

 Astrogonium 

 Astropecten 

 Clenodiscus 

 Echinaster 

 Echinus 

 Structure of ( Luidia 



Ophidiaster 

 Ophiolepis 

 Oreaster 

 Pteraster 

 Scylaster 

 Stellaster 

 Solaster 

 ^ Uraster 



from the 



PAGE 



140, 143, 146, 147, 148, 151, 153 



. 150 



23, 26 

 . 36 

 23— 3C, 169 



Upper Trias to the 



. 189 



18 

 9 



10—12 

 7, 8, 13, 18 

 4, 13, 17, 18, 22 

 . 18 

 11, 13, 17, 18 

 18, 19 

 6, 17, 18 

 8, 13, 17, 18 

 . 11 

 9, 18, 22 

 5, 17 

 13, 18 



5, 17, 18 

 4, 11, 17, 18, 22 



Summary and analysis of the British Jurassic Echinoidea, Asteroidea, and Ophiuroidea 



described in Vols. I and II of the 'Oolitic Echinodermata ' . . . 171 — 187 



Terminology of the Asteroidea : 



Ambulacral and interambulacral plates ..... 13 — 16 



Arms 

 Body 

 Dermis . 

 Eyes 



Granules . 

 Madreporiform body 

 Oral opening 

 Osseous system 

 Ovaries 

 PaxillsR . 

 Pedicellarise 

 Skeleton . 

 Spines 

 Tegumentary appendages 

 Test 

 Vent 



1—10, 12, 131, 134, 135, 137 

 1, 3—22, 131, 134, 135 

 1—11 

 7, 16 

 18 



5, 16, 17, 22, 32 

 . 132 

 10—16 

 , 131 

 4,6,11,18 

 4, 5, 9, 11, 18—21 

 1,2,3,10 

 17, 18, 20 

 17—21 

 3 



4, 5, 9, 13, 16, 17, 21, 22 



