PALZOZOIC. CONDI RIEL IN IT OE ODN CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
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SPECIES. sldlelel (elses lee Rieialsla REFERENCES. 
m/elsla] wes iA lslsisis(Slels| 2 
S/H Sfalelsleftlslelalglslslele 
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HISISIBISIAISISIDIFIEIE IR 4b 1a Ia 
Sub-Kingdom, MOLLUSCA. 
Prov. ODONTOPHORA. 
Class, CEPHALOPODA. 
Dibranchiata. 
Ones) . 
Tetrabranchiata. 
ORTHOCERATIDE. 
Actinoceras ...... Bronn, 1835 ... TETRABRANCHIATA,. 
Ormoceras ...... Stokes, 1840 ... 
— baccatum......... TERT RODE ced bed ben eecl bod hoe ae eed bee Ge Flea ea lesa teal ecalee| eee | Geolee Mar ivolesvenps1395nu- os 
— Brightii ......... ISTEDE ceaqacostber ee |iers | ee] werd ess ese eel sel cas secfeee| oe Joee|-ee[-ee]...{---| Ortho. Sil. Syst. p. 626, 706, t.12, £. 21. 
— Brongniarti ... Troost ......... ate eal anol eee] 6c P| Boel 34 face seclecsfere[eee[ees]eee]ee.[<..] 720 Orthoceras. 
—nummularium Sow. ...........:}... A ea bed eee vesfece[eee xe feee[ees] ae feee[eee[ee-].e.[-..| Orthoceras, Sil. Syst. p. 632, t.13, f. 24; ib. Siluria, 4 ed. 
t. 26, £. 5. 
NAvTILID®. 
Ascoceras ......... Barrande, 1847 
TETRABRANCHIATA. 
Cryptoceras ... Barrande, 1846 
— Barrandii ...... ISGLE.. cot omnes wiel cool sseleasflsss see|ese}scchess vee[eeefeee] Poe] ].--]..-1 Q. J. Geol. Soc. vol. xii, p. 381; ib. vol. xiv, p. 180, t.12, 
f. 7; ib. Siluria, 4 ed. p. 233, Foss. 63. 
Cycloceras ......... M ‘Coy, 1844... 
— annulatum ...... ISTE — secoeacoscos Ae eo [cal ood (ed Ral ree od Ge Bed endl Baal Bap 
—— DEL, soesascsseeee SOWNe cs cvesssses| vos love) e2~ te | -cafeaa| ove) eee) ses 
— sub-annulatum Miinst. ......... Per eal hoa rat (Gee BAA Bod ert es wes[oes[ece]eee|eoe|eee]eee|---| p Made Orthoceras. 
— tracheale......... sth Ree pee opera God ad Bod oad fosc| oe) sceillood Kee 
— tenui-annulatum MCoy .........)...)s0-|ee-|erfooe|eoefene|eee[es 
ORTHOCERATIDE. 
Cyrtoceras ......... Goldf. 1832 ... 
Campulites ...... Deshayes, 1832 
Cyrtoceratites... D’ Archiac,1842 
Trigonoceras ... M‘Coy, 1844... 
Oncoceras ...... J. Hall, 1847... 
TETRABRANCHIATA. 
Aploceras ...... D? Orbigny,1850 
Piloceras (part) Salter, 1858 ... 
— approximatum Sow. ............ sealosstews|cae[ ses sesece[eee] ge [ecefece|eeefeee[eas]ece[eae|---| Oxthoceras, Sil. Syst. p. 642,706, t. 21, f. 22. Cyrto. 
Siluria, 4 ed. t.11, f. 4. 
— atramentarium Saif. ............ eed baal aa) ea bios Sah) || Baal boo seslecc]ece|oee[eoe|eee]ese|se.] Mem. Geol. Surv. vol. iii, p. 358, t. 25, f. 2-4. 
— inequiseptum... Portl............. “Aatlecn| Ineo fac sce Peril aed taco wialecefece{eee{ece|eee{ee-{...] PAvagmoceras, Geol. Rept. p. 382, t.28A,f.4. P. Brateri, 
Miinst. Beitr. 3, p.105, t.1, f.10; ib. Portl. Geol. Rept. 
p. 283, t. 28 B, f. 3, 4; ib. Geinitz, Verst. Grauw. p. 33, 
t. 5, f. 2, t. 6, f. 5. C. inequiseptum, Siluria, 4 ed. 
p. 200, Foss. 43, f. 1. 
Se MLPDE'. . s ccscedeneess BOWE “aevccses des sliocs breed hod hee Bon leo teed (a sec[ee-[ece[ees|eee[eee|ee-|...] V2de Ecculiomphalus, 
— multicameratum Hall ............)..- el Peele ee Pla eee seslece|ooe{eee[eee]oee{ee-[...| Pal. New York, vol. i, p.195, t. 42, £.4; ib. M‘Coy, Brit. 
Pal. Foss. p. 312. 
a PTOCOK 0s ssc005sv Salt. se.ciseseees|s-- bad heel [eS] lod) ree lose! aod eae Aleeleee[eee[eee]eeeeee{...| Mem. Geol. Surv. vol. iii, p. 358, t. 10, f. 3. 
= ES oeceeeceero OGLE. escacses ess| ase sell ecei| series = eal et [ewe feos sss[eee[eee[eee]eee]eee]eee[ee-| Mem. Geol. Surv. vol. iii, p. 357, t. 25, f. 1. 
— sub-arcuatum ... Portl.............|... er cal aed bos ard eee eo Nee PP A Viel bi Loa Vetd lensed lr Vide Orthoceras. 
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