PALAOZOIC. GASTEROPODA. ‘ CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
z| |S BSS |e lee |S i882 
2] 12]. BlSIS io lala id | 
Alalm|s 6|/S]/alz]2 Blips lA 
SPECIES. elSlalS] .-le)2lla| SiS iS \AlslAlgia REFERENCES. 
nl) elle SIS IAS lS(S1Slxale@lealis]s 
(8G alelelelelclslereleislsklele 
BIS |e(212 (S18 /S Alc ie esl alais (2 
SIS(SIGISIAISISIP IE IE IE Slaps ja 
Murchisonia (continued). 
— torquata .. a LEO, sanersenioce seo [ece[ece[eeePerelece| eee eeefers ses[eee[enefooeleee] & | ]e-] Brit. Pal. Foss. p. 294, t.1 L, £. 19. 
= {RIND soanoconnod SB Ont tecenede cores EZo|{ee5| [obo] |ood g50 pod Vf [aod fanc sis[eee]oee{eee]eee|ees]eee|ee-| Plewrotomaria, Geol. Rept. p. 412, t. 30, f. 7; ib. M‘Coy, 
Brit. Pal. Foss. p. 291. 
NAtIcIpm. 
UNiatiCas .f...+cc.socee Adanson, 1757. 
‘ a HOLOSTOMATA,. 
Naticopsis ...... M‘Coy, 1855... 
parva cosivacsvoue So eee call edieelealiee ccd fecal ate vesfeeeferelerefecs| ye feee{eee| Sil. Syst. p. 612, 706, t.5, f. 24. Nat. glaucinoides, Sow. 
ib. t. 3, f.14. Naticopsis, M‘Coy, Brit. Pal. Foss. p. 302 
t.1 K, £. 35. WV. parva, Siluria, 4 ed. t. 25, f.1. ; 
— glaucinoides .., SOW. ..iccevevee 504 lsoo|[o00])504 ea 04]oo [nel [aon sislece[eeeface|eee[eer[ece|-ee] ede N. parva. : 
Naticopsis .....0.+ M Coy, 1855... 
Platyostoma Klein,1753(Conrad) 
— CORCINNA .....4... UCC) osponane Fb {ose||on0| foe fase ierllecaliere| cere weelecelese[ece|ece|eee|eee] soo] 2d Holopea. 
— glaucinoides ... M‘Coy ......... 66 ||s60| (boo! bod eos SEE \SScllope Face seslsce[ece[acelees[ece[ece{e--] ede Natica parva. : 
INETILG, es vecsinneiiees Linn, 1758...... wedlHea|leeallnet |eoe aocllece lear one Asal Cee laeta| feel lene See lee eee Acroculia. 
TURBINIDR. 
Ophileta c.p.cecce Vanuxem, 1842 
Helicotoma...... Salter, 1856 ... Sa ROTTIN. 
Straparollus?.. Montfort ...... 
— compacta......... ISQUE wencatoccee ecalleee|| 500! oe [ban Pal noallocr laced ssclous[oes{sen[eceleeefee{ooe| Geol, Surv. Canada, Dec. I, p.16, t. 3; ib: Siluria, 4 ed. 
p.165, Foss. 27, f. 4; ib. Salt. Q. J. Geol. Soe. vol. xv, 
p. 378, t.13, f. 125; ib. Baily, Char. Foss. t. 8, f. 115; ib. 
Billings, Geol. Canada, p. 115, f. 23 a, b, 1863. 
— Macromphala.., WZ‘Coy ......... seni |an4] load fan4| {Ga Boo) [Sed lane seal ces|eee|eoa|ess|eeo|ees|-2.| Dlaelurea, Brit. Pal. Foss. p. 300, t.1 i, £. 12. 
== “Sp. ss aa stats Go0 adlleed acc Secllcce|ees|soslleve||aeclee||--«| Mem. Geol. Surv. vol. 11, p. 348, t.1D.B, £ ar. 
nS) eerenreaeeens Hicks oleae tans Tealvcnlann seul eee levaleorlees|QudMGeol. SOc) VOl.xxxi ep, TOG. isin tas: 
PATELLID®. 
HOLOSTOMATA. 
Patella? .......0000s Linné, 1758 
— Saturnii ......... Goldpfv cco: Slieclechee tes: pee Headed Vee veleccfoefecfee{esfeeefee.| Pet. Germ. t.167, £.25; ib. Portl. Geol. Rept. p. 416; ib. 
Siluria, 4 ed. p.197, Foss. 40, f.9. ? Discina. 
TURBINID®. 
Platyschisma...... M ‘Coy, 1844... 
TrOChiUs .....010. (part) Auct. ,.. ce nen 
STOMATA. 
Turbo .... .«» (part) Auct. ... 
— helicites ......... SOW Seccsscasass Goal lace [eee esd loon see] ae [eve x Jece[erece|ees|eee] ae la] x | Zrockus, Sil. Syst. p. 603, 706, t.3, f.1e,5. |Platyschisma, 
Siluria, 4 ed. p. 162, Foss. 26, f.9; t. 34, f.12. 
— simulans ,,.,..... SQLS \ausececsnes nae] eal ood teed (oe alae tes sc{eeelecelees]eee] ge [eae{eee] Mem. Geol. Surv. Expl. sheet 32, Geol. Edinb. p.142, t. 2, 
f. 19. 
— Williamsii ...... SOW. cusaveseenes 2c||boa| [aca foad [ood sesfene| ge Jece|oee[eee[ece{eceloee] xe [eee|eee] Zenda, Sil. Syst. p. 603, 706, t. 3, £.6.  Platyschisma, 
Siluria, 4 ed. t. 34, f.14. 
HAiorip®. 
Pleurotomaria ,.. Defrance, 1825 
Ptycomphalus... Agassiz ... HOLOSTOMATA. 
— angulata......... ISU. eeacconenee PA fan) eee (aed) [eee] oe! Ipeal Ged) (aol loge lead) [eos ag 
— balteata ......... Phill. \ Vide Murchisonia. 
— crenulata,........ ISOOU) Caserccas se alleecllless| les as pal el (sod (see fae |leail se Seal |eee ee age ees mBrit. (eale Ross. p20 mb mmerd ls 5 
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