DISTRIBUTION OF BRITISH ECHINODERMS. 179 



Not known Number 



beyond of Species. 



120 fins. Porania pulvillus, Asterias rubens, Amphiura chiajii, A. 

 JiUformis, A. elegans, Echinus esculcntus, Echinocardium 

 pennatijidum 7 



150 fms. Psoitis phantapus, Ps. fabricii, Hippasterias phrygiana, 

 Solaster endeca, Gorgonoceplialus lincki, Echinocardium 

 Jlavescens 6 



200 fms. Thyone raphanus, Stichaster roseus, Ophiura ajfinis, 



O. robusta, Spatangus raschi 5 



250 fms. Cucumaria frondosa, Ophiura albida, Ophiactis balli, Neo- 



lampas rostellata 4 



500 fms. Cucumaria hyndmani, Astropecten sphenoplax, Bathy- 

 biaster vexillifer, Luidia sarsi, Rheyaster murrayi, 

 Asterias muelleri, Odinia pandina, Ophiura sarsi, Ophio- 

 pholis aculeata, Amphiura borealis, Ophiopus arcticus, 

 Ophiacantha spectabilis, O. abyssicoia, Ophiothrix luet- 

 Jceni, Ophioscolex glacial is, Ophiobyrsa hystricis, Ophio- 

 myxa serpentaria, Astronyx loveni, Gorgonoceplialus 

 encnemis, Echinus microstoma, Echinocyamus pusillus, 

 Schizaster frayilis 22 



750 fms. Cucumaria hispida, Holothuria intestinalis, H. tremula, 

 Stichopus tizardi, Antedon eschrichti, A. phalanyium, 

 A. prolixa, A. tenella, Ctenodiscus crispatus, Lepto- 

 ptychaster arcticus, Lasiastcr villoma, Psilaster andro- 

 meda, Pentayonaster granulans, Mimaster Jizardi, 

 Solaster furcifer, 8. papposus, Corethraster hispidus, 

 Pteraster militaris, P. personatus, Uymcnasteryiyanteus, 

 Ophiura siynata, O. aurantiaca, Amphiura bellis var. 

 tritonis, Cidaris purpurata, C gracilis, Asthenosoma 

 hystrix, Stronyylocentrotus droebachiensis, Spatanyus 

 purpureas 28 



1000 fms. Holothuria aspera, Pontaster tenuispinis, Astropecten 

 irregularis, Petit ay onaster greeni, Neomorphaster 

 eustichus, Ophiactis abyssicoia, Ophiochiton ternispinis, 



Known Ophioscolex purpurea, Cidaris papillata 9 



be yond 



1000 fms. Plutonaster bifrons, P. pareli, Nymphaster subspinosus, 

 Cheilaster jimbriatus, Zoroaster fulyens, Hymenaster 

 piellucidus, Henricia sanguinolenta, Brisinga endeca- 

 cnemos, B. coronata, Ophioctcn sericeum, Ophiomusium 

 lymani, Ophiacantha bidentata, Phormosoma placenta, 

 P. uranus, Echinus acutus, E. norvegicus, E. elegans, 

 Brissopsis lyrifera 18 



Table IY. — List of British Echinoderms, arranged by grades 



of Depth from below upward. 



Not known Number 



above of Species. 



1000 fms. Hoi. aspera, Pentagonaster greeni, Cheilaster Jimbriatus . . 3 



750 fms. Neomorphaster eustichus, Pteraster personatus, Oph iochiton 



ternispinis, Cidaris gracilis, C. purpurata 5 



n2 



