PALZOZOIC. GRU TIVACG HAS CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
: eal frst le Pe | 5 my 
P| wo] .] .] w/e 
=| |. a/S(E/ElSie/elalele 
5 op AISISIS(Slslelsiels 
Blelelel |.lst8iseergige 
SPECIES. sldlals|SlolleleeleiiGlalals REFERENCES. 
ira OA a dalled (EOS a eda Pa 
HIS|21515/8|£/2/.18|5|5/2/8) s/213 
RIA\RS|ZR SIRE EER <a oe ie 
Tlenus (continued). 
== ND: Geo Socccceees ING Lday cas cioenaae nae S54 [444 [Sad fred [os ed Jal eed [one ws-[eeeleeefeeefeee].ee]ees|-.-] Mono. Brit. Sil. Trilob. Pal. Soc. p. 215, £. 57. 
ASAPHIDE. 
Isotelus ............ De Kay, 1824... 
— arcuatus ........- Ort netsy.cesses Bed bea! eal sael Hoo sot feoallodd bad seslecs{ece{ersore|oes[eee}eeel Wide Asaphus rectifrons. 
— intermedius ... Portl............. nee lecsilieve| ees ees Se lens bod bee sss[ee[eeefere[eee]eee]eoe[--+] Wade Asaphus gigas. 
— leviceps 4 , ol lscq loon Beal ersiall siais Biaisye Secfereiincc|seefeesifiare|ineeliens| J 200 Asaphus scutalis. 
i, is foal eral cos lead lesa nad toca lao foo Reifel ses |esc'|lorielicn lies =| 'noo| lade. Asaphus gigas. 
— planus Sawataccaaels '. S84 6s0) host lead fond Sa lsecsy dad load Baal load |bec! Soe, fod Madi Ioaallncalh Tey ea Asaphus gigas. 
| — Powisii ......... Murch. ..0csc.00 259) Weoe! (eo fee] [Aco Bed feed ie feos secface[ece[eee[ersleee]...fee+] Wade Asaphus Powisii. 
— rectifrons ...... Port ls rsevencesk metilicasll sactece lice ped feo) lagel fons sea[eee[ee[eee[eeeleee]...[eee| Wade Asaphus rectifrons. 
— sclerops Seal [58 Bed dea aaa eae 5898 (S34 [odo loch fon sad aed iach ze7e Asaphus gigas. 
CALYMENID®. 
Kenigia ............ Salter, 1865 ...|...|...|..-|...J-+- See loliced bode saslee[evc]ocefecs|seelecefees| 22d@e Homalonotus. 
LEPERDITIADE. 
ee roore Jones, 1859...... 
peel ONES Gs ELOUW oaa| -<cleae|/-20|aaelaos bedi lee seal lose wae[eecfeee[eee]eeel x [.[eee| Ann, Mag. Nat. Hist. 4 ser. vol. iii, 1869, p. 224, t.15, f. 9. 
LEPERDITIAD®. 
Leperditia 
tl MU PPOSUESe ane nc EULs Neswarasteses| ve) cael <|eee] cas see fese| saul ore oae|eedl cesleee Vide Primitia. 
— Cambrensis...... TERE epecnocenacs Pal eed lose lode ta Sonllssollrad boos Pealeeclleca|aeu|sssleselensleecl Qu dal Geolessoc: wolexcxvils pa4Ol tals 5) .ul5 U7. 
— Hicksii ......... SORESY vieecnietess al LES | eee (Be ain Sse nea {ano Beale leoeleeel eral eee lace [aaa teu Geols Soc: -vOlocxvaily plas ntalss 00. 
— marginata ...... RiCy 8 .voraie sees 4 foc) noe! fact [sas ses[ecelaeefon |...|cesjeee|eee|ee-/ee-] % |e] Cypridina, Wissen Beobach Petschoraland, 1846, p. 288, 
| t. 11, f.16. Leperditia, Jones, Ann. Mag. Nat. Hist. 2 ser. 
vol. xviii, p. g1, t. 7, f. 11-15. Cypridina Balthica, 
° Eichw. Bullet. Imp. Soc. Moscow, 1854, No.1, p. 99, t- 2, 
f. 6 
BA eet Iota leecd Aaa foal [see Vide Primitia. 
Fal loos ieee] Boel ee foe ose fae Q J. Geol. Soc. vol. xxvii, p. 396. Larval trilobite ? Jones, 
Q. J. Geol. Soc. vol. xxviii, p. 184, t. 5, f. 17-18. ? Primitia. 
NEBALIADE. 
Leptocheles ...... M‘Coy, 1849 ... 
— leptodactylus ... M*Coy ......... BER) ee ers cel i ae ese eed (seed ce eel (etet |G octal iat (eet oar 
zi , ce ef | \ride Ceratiocaris. 
— Murchisonit ... Ag. ..........000. G06 ao] fool bad |ace ed Sec bbod| lane lade Heel focal lace) loan] [dod| 16) fade 
LicHADID2. 
MA CRAS iw sac2ecerese- Dalmann, 1826. 
Acanthopyge ... Hawle & Corda, 
LOAT tesserae 
Corydocephalus Hawle & Corda, 
1847 ee 
Dicranogmus ... Corda, 1847 ... 
Dicranopeltis,.. Corda, 1847 ... 
Nuttainia ,.. Eaton & Emmerich, 
TSA 5 sccevesseone 
