PALMOZOIC. 
CAMBRIAN. LOWER SIL. 
HETEROPODA. 
UPPER SILURIAN 
CAMBRIAN AND SILURIAN. 
a HHS (ESI Ite ; 3 
=| lal | | laletelitelalelelele 
a|l2|.| |. cReERes erie 
SPECIES. lela le| (Si ohele | ers ra lalelalel a REFERENCES. 
RNHlEislalw Si SiRlsis|Slslalelatsls 
o/s) STelelsleltslelelf lal slele 
S1S/E/SISIS/S/ Slate 1el2|/ojalais|a 
HIS IRIEISIRISIAIS IF IE IE IA ipa |e 
Theca (continued). 
— simplex ......... ISIE aaseece soe # |e [eee[eeefeePeeefeee[eee Mem. Geol. Sury. vol. iii, p. 352, t.11 B, f. 22-26; ib. 
Siluria, 4 ed. p. 48, Foss. 9, f. 5. 
= (4°91 apd bed eon] las land 1600) [aoa lose Iaeel fone Hicks, Q. J. Geol. Soe. vol. xxviii, p. 180, t. 6, f.18, 19. 
Tig ES beeps ACF Meso nenee cael EH loool [rod load fess Fs Feel endl apa loc Orthoceras, Geol. Rept. p. 375, t.28 A, f.3. Theca, Siluria, 
4 ed. p.199, Foss. 41, f. 2. 
= 7 [ens| eoal [cad eee Ieee [ec [aol ieee Siluria, 2 ed. p. 53, Foss. 9, f.14; ib. 4 ed. p. 51, Foss. 10, 
f.14; ib. Mem. Geol. Surv. vol. iii, p. 352, t.10, f.14. 
Order, Nucleobranchiata Blum. 
Heteropoda Lamaroux,1812 
ATLANTIDE. 
Bellerophon ...... Montfort, 1808 
Bucania ......... Hall, 1847 ...... BOCES Ea 
Euphemus ...... M ‘Coy, 1844... 
— ACUEUS........0005 I{e25  spooskoadna9) joes] a8) (090) aed Joao ala] Pe] x Sil. Syst. t.19, f.14; ib. Siluria, 4ed. p.199, Foss. 44, £. 7, 
t. 7, f£.8. ? B. carinatus, Sow. 
— alatus ............ JRO FA epee 0008 ace \ead food bec! load S13 bed [pdalloaal eee Geol. Rept. p. 471, t. 33, f. 9. 
— apertus ......... TET als eanescene cos] oso) (ed [eed [ece Ino! ope] [ee oso! [oad [ooo Ieaal jsac Vide Bel. Wenlockensis. 
— arfonensis ...... ISLIAS a Seen DE EG £31 |e Ibo {504 8a oda) [anol Ione Mem. Geol. Surv. vol. iii, p. 349, t. 10, f. 6-8. 
— Aymestriensis Sow. .......scce.[ee|oee|oee|enePeee|eee[eee|enePoos|eee[ers Vide B, dilatatus. 
— bilobatus......... IS{O20S.pececbe-p006) 604] [005] joe] aad soc xl | Pe | xe Sil. Syst. p. 643, t.19, £.13; ib. Hall, Pal. New York, 
vol. i, p. 184, t. 40, f. 3. Var. compressus, Geol. Rept. 
p. 397, t. 29, f.2. B. bilobatus, Bill. Geol. Canada, p.182, 
f.18t. B.elongatus, B. gibbus, Portl. Geol. Rept. t. 29, 
f. 3,4,5, p- 397- B. bilobatus, Siluria, 4 ed. p. 68, 
Foss. 13, f..10;) 6.7, £..9. 
— Cambrensis...... UBL Ee rans ceec cane lors ail et ltee. Peas | wes |ieee| eal ees Geol. Mag. vol. v, p. 11, t. 2, f.19, 20. 
— carinatus......... KEES spqsoneso0ns||250 [ood |sa5l aad long x | *)x * Sil. Syst. p. 604-705, t. 3, f. 4 and1d. B. acutus, Salt. 
Q. J. Geol. Soc. vol. vii, t. 9, f.18. B.carinatus, Siluria, 
4ed. t. 34, f. 8. 
— dilatatus......... ISEE.ES se aeeeesden9| 104] obo jeool aod Kao P3Nlood ta00 x x Sil. Syst. p. 627-705, t.12, f. 23, 24; ib. var. Portl. Geol. 
Rept. p. 398, t. 29, f.1; ib. Siluria, 4 ed. p. 199, Foss. 41, 
f. 8, t. 25, f. 5, 6. B. Aymestriensis, Sow. Sil. Syst. 
p. 616-705, t. 6, f. 12. 
— elongatus......... deta reek eebesnacs| (eco 00g] Ed] Mek] Beal neo (sed) [aed (abel ea Ieee Vide Bel. bilobatus. 
> CUE a apeocoS.5, ‘cagenosseces| [spel oan! lado lage! toe | Pax x x Sil. Syst. p. 613-705, t.3, f. 32: ib. Siluria, 4 ed. t. 25, 
’ f. 8; t. 34, f. 20; t. 35, £. 28. Bel. globatus, Sow. Sil. 
Syst. t. 3, f£.15. 
— Gibbus oo. cece 22 Fd ee oecocnocea a (bod |-25| loec fa00| {coal [acel lao [baal ooo Vide Bel. bilobatus. 
— globatus ......... Sie Be ee eeottoced Seal sed ec Ped Beal cael eee ee (eee Vide Bel. expansus. 
— hippopus......... QUE ecseesecceos)| eee] tenes (All col tser| joc fetal ood [abet (eae Mem. Geol. Surv. vol. iii, p. 350, t.11 B, f. 2. 
— Lianvirnensis ... Hicks ............|...|...|.- 4 Lea eee oa peel (aoe Q. J. Geol. Soc. vol. xxxi, p.188, t.11, f. 2. 
— multistriatus ... Salé. ..........00|.02|-00| 0 52 [alla aed [sed Ieee) Geol lope Kis Mem. Geol. Surv. vol. iii, p. 350, t. 10, f. 9, Io. 
——eMurchisoni.....6 LOrb. t..0s0s.0\ucs|-o0|2+>| =22]s<|>0- * Mono, t.7, f.1-3. Bel. striatus, Sow. Sil. Syst. t.3, f.12e. - 
B. Murchisoni, Siluria, 4 ed. t. 34, f. 19. 
— nodosus ......... Baltes ccc cscsecces| see) eue|herleos| our 3} feed lesa seal lee Q. J. Geot. Soc. vol. x, p. 73; ib. Siluria, 4 ed. p. 68, 
Foss. 13, f. 11; ib Mem. Geol. Surv. vol. iii, p. 349, 
woodeut 15.  Cyrtolites ornata, Conrad, Geol. Rept. ; 
Hall, Pal. New York, vol. i, t. 84, f.1; ib. M‘Coy, Brit. 
Pal. Foss. p. 310. 
119 
