PALZOZOIC. (G8 IPE AIR OOO IDA. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
Z Als Sl eSeleSiieler 
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5 op MISSI S(Sisisisiela 
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SPECIES. slelels! ISiclalslaalsialelalele REFERENCES. 
De isla] ws SiAys |s|8)s)a|elalisls 
8 Cid). Sls laio 5l+ 
| 2 | | 2 Alals|_lelel/selelglalaie2 
SOE SI 21S/s/SfalOlP) 2] S| a) als | 3 
TIBI ISI AIO APP IF FS | Al<4 ib Ja |e 
Lituites (continued). 
— planorbiformis Conrad ......... Bon eh leoolioad base Socilalllood [oe ses[ecs[eeefeee[erefeee[ee-]---| Drocholites, Jour. Acad. Nat. Sci. Philad. vol. viii, p. 274, 
t.17, f.1; ib. Hall, Pal. New York, vol. i, p. 310, t. 84, 
f, 3. Lituites, Salt. App. Brit. Pal. Foss. Nautilus 
primevus, Salt. Q.J.Geol. Soc. vol. i, p. 20. 'Trocholites, 
M‘Coy, Brit. Pal. Foss. p. 324.  Lituites, Salt. Mem. 
Geol. Surv. vol. ili, p. 358, t. 25, f. 5. 
— tortuosus......... OWS vrsecteccs oe Boo bent eaal nod [eas orll aaa Saf Se sesfees] ak [eee[eee[eceeee[ee-] Sil, Syst, p.622, 705, t.11, £,3; ib. Siluria, 4ed. t. 33, f. 4. 
— undosus ......... WOW) Sesvs waters. eo lbaol lapel need [aed sesfece| oe Peve[eee[eee|eue[erefers[eee[eee]e-| Waudtilus, Sil. Syst. p.642, 705, t.22,f.17. ituites, Siluria, 
4ed. t.11, f. 3. 
Nautilus .occccveoves Breynius, 1732. 
Primevus ...... IS GICET escnes caer’ 584 lace |a09) cel Joos podlI29| ood boon seslece[ece[eee{eeefeee[oae[o..| Vede Lituites planorbiformis. 2 
Oncoceras.........05: Hall, 1846...... edollesel oe aod [aoe een eeelloce| |son reellecc|lee]-+-|e-=]->>||-e0[ee-| Ved@e Phragmoceras, 
Ormoceras ......... TATE SREY (oar foe loool ace ood jasc lace eal load [ooo Vide Actinoceras. 
ORTHOCERATID®. 
Orthoceras ......... Breynius, 1732 
Cyeloceras ...... M ‘Coy, 1844... 
Gonioceras ...... Hall, 1847...... 
Actinoceras ... Bronn, 1835 ... RENEE NOE 
Koleoceras ...... Portlock (part) 
— angulatum ...... WON ne cvesssenss oct losnl label kas [ese seal ae feePox [eee] ae ok [oe] ok ]ee-]e--]---] Upsal. 8, p. 90; ib. His. Anteck. vol.v, t. 4, £.8; ib. Leth. 
Suec. p. 28, t. 10, f. 1. O. virgatum, Sow. Sil. Syst. 
p. 622, t.9, £..4; ib. Hall, Pal. New York, vol.ii, p. 291, 
t. 63, f. 2,3. Orthoceras angulatum, Siluria, 4 ed. t. 28, 
f. 4. 
— annulatum ...... BOs ates caesesss Sea lieas| tise ea | es seef oe | & Pe [eee] o& [eee] & ]---[eee]---]---| Mim. Conch. 2, p. 77, t- 1333 ib. Sil. Syst. p. 632, t.9, f. 5. 
O. undulatus, His. Anteck. vol. v, t. 4, f. 6; ib. Leth. 
Suec. p. 28, t. 10, f. 2; P var. O. fimbriatum, Sow. 
p. 620, 706, t.13, f. 20; ib. Siluria, 4 ed. t. 26, f.1, 2. 
— approximatum Sow. ............ S01 onal laeia| load eae ssh |les=|lese[ [ok |e] ees|2e|seels7=|Uen|eocl eee] OL. SYSt. Pr\O42, 700, b. 21, £, 22. 
— arcuoliratum ... Hall ............ ers esi gel ee ees |e [eoe[ eee seolece|ecs|eae|eee[eee]eee(pes| Pal. New York, vol.i, p.198, t. 42, £.7. ? Cameroceras 
trentonensis, Conrad, Emmons, Geol. Rept. p. 397, f. 4. 
Cycloceras, M‘Coy, Brit. Pal. Foss. p. 319. 
— articulatum ... Sow. ...........- 6c) Gal |cod| fear) joe Feo) doe! food foo vee[eesfeee] Pleo] & |--[---| Sil, Syst. p. 613, 705, t. 5, £. 31. ? Lituites. 
Sil. Syst. p. 632, 706, t.13, f. 25; ib. Siluria, t. 26, f. 1,2. 
Mem. Geol. Surv. vol. iii, p. 357, t. 24, f. 7. 
? wss[eae]ee-[es{eee]eeo]--[--»| Siluria, 2 ed. p. 50, Foss. 8, f. 4; 4 ed. Foss.9, £.4: ib. 
Mem. Geol. Surv. vol.iii, p. 356, t.11 B, f.18: ib, Baily, 
Char. Foss. t. 8, £. 16. 
— baculiforme .., Salt. ............ hott oa esd lee) laos dealleas |sea Ros senfecafece]eoe[eee] ok [eee|ee-] App. A, M‘Coy, Brit. Pal. Foss. p. vi, and p. 313, t.1 L, £.27. 
? O. linearis, Miinst. Beitr. heft 3, t.19, f.1? 
— Barrandii ...... Salinger oeeasce Boo nal oo [sae ieee bod fasollsoc| (5 la8a load eed leo eel local oad lose | Oca lbststerch aval Gap im Op, Tey Yosh 
— bilineatum ...... ‘Hall, Src Gal EBS| teal ad bese seal EMI BE [ beilie<+|/cee| (ese eacleee|enu|eealeen| bal. New, Mork svoleasmpaloOsmiardgemtay and pass. ba075 
f.4; ib. Siluria, 4 ed. p. 200, Foss. 42, f.2. O. sub- 
annulare, Miinst. Beitr, 3, p. 99, t. 19, f.3. O.calamiteum, 
id. ib. vol.i, p. 36, f.17, f. 5. O. tubicinella, Sow. Geol. 
Trans. vol. v, p. 703, t.57; var. Portl. Geol. Rept. p. 367, 
t. 25, f. 3, 4. O.calamiteum, O. sub-annulare, Portl. 
Geol. Rept. p. 365, t. 25, f.1, p. 367. 
Vide Tretoceras. 
Geol. Rept. p. 373, t. 28, f. 8. 
— bisiphonatum ... 
— breviconicum .., 
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