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32 48 Products. 
33 75 Xiphosura. 
33 8 1 Antbrapaleemon, Crangopsis, Pygocephalus. 
33 83 Orodus, Cochiolodus, 
33 85 Psammodus, Petalodus. 
35 138 ?#" vetusta, Pupa vermilionensis, Zonites priscus. 
35 142 Pal&odictyoptera (precursors of modern beetles). Scorpions 
( Eoscorpius carborwrius, Cyclophthalmus senior). 
35 143 Protolycosa anthracopUla, Phalaranea borassifolia. 
35 144 Titanophasma) Protophasma. 
35 ^45 Archimylacris. 
37 Ipl Keraterpeton, K. crassum, Baphetes planiceps, Loxomma, 
Archegosaurus . 
37 194 Hylonomus. 
37 r 95 Dolichosoma iongissimum. 
PERMIAN PERIOD 
39 19 WalcUa, Ullmania, Poltzia, Ginkophyllum. 
40 22 Pterophyllum Psygophyllum. 
40 39 Euechinoids. 
40 43 Amblypterus, Platysomus, Rhabdolepis, Palteoniscus macropomus, 
Acanthodes. 
41 48 The technical names for the primitive are diphycercal (where 
the backbone runs straight down a tapering tail), and 
heterocercal (where the tail consists of two lobes and 
the backbone bends slightly up to take the line of the 
upper lobe). 
41 53 Archegosaurus, Actinodon, Protriton, Melanerpeton. 
41 56 Proreptilia (Eryops, Cricotus). 
41 59 Paleeohatteria longicaudata, Proterosaurus , 
41 67 Naoiaurus clainger. 
227 
