I 
reguläres 
557 
Gnatho stomata 
Atelostomata 
Echino- 
conidae 
und 
Cono- 
clypeidae 
Pygaster 
Clypeastridae 
Cassidulidae 
Holasieridae 
Spatangidae 
Euclypeas- Scntellinae Ecliinoneinae EcMno- 
trinae lampinae 
Anancliytiiiae Palaeostominae Spatanginae 
Oonocly- 
peidae 
Oviclypeus 
Conoclypus 
Clypeaster 
Laganum 
Rumpliia 
Fibularia 
Echinodiscus 
Encope 
Mellita 
(Lobophora 
Echinoneus Neolampas 
Echinolampas 
(Nucleolites 
I Echinaracli- 
| nius 
| Amphiope 
[Arachnoides 
Runa 
Scutella 
Cystechinus 
Palaeopneustes 
Cionobrissus 
Aerope 
Aceste 
Homolampas 
Pourtalesia etc. Palaeostoma 
{ Catopygus 
(Rhyncliopygus 
Echinoneus 
Clypeaster 
Laganum 
Lenita 
Scutellina 
rSismondia 
Mortonia 
Pyrina 
( Ecliinolampas 
{ Echinanthus 
(Nucleolites 
Pygorhynchus 
Amblypygus 
Asterostoma 
Ananchytes 
Holaster 
Palaeopneustes 
Spatangus 
Lo venia 
Maretia 
Hemipatagus 
Breynia 
Echinooardium 
Brissopatagus 
Agassizia 
Hl egalaster 
Eupatagus 
Conoclypus 
Echino- 
conidae 
Ecliinoconus 
Echinocyamus 
Fibularia 
Pyrina 
Heterolanxpas 
Nucleolites 
Faujasia 
( Caratomus 
) Cassidulus 
Hemipneustes 
A ,. . Stenonia 
Infulaster 
Cardiaster 
Holaster 
Discoidea 
Holectypus 
Pygaster 
f Pyrina 
IPachyclypus 
Infraclypeus 
Galeropygus 
1 Phyllobrissus 
Clypeopygus COl M iliae 
Bothriopygus 
Echinobrissus Holaster 
Pygurus 
fMe taporhinu s 
S Dysaster 
(.Collyrites 
Linthia 
Brissopsis 
Brissus 
Schizaster 
Pericosinus 
Peripneustes 
Cyclaster 
Macropneustes 
Prenaster 
Micraster 
Epiaster 
Jsaster 
Hemiaster 
Enallaster 
Toxaster 
Hoteraster 
Pileu 
'Hole( 
s 
;typus 
Grasi 
pseudodesorella 
(Pygurus 
a 
iPygaf 
ster Galeroclypeus\ Echinobrissus 
Galeropygus 
Ilyboclypus 
Collyrites 
Clypeus 
Pygaster 
Galeropygus 
