GASTEROPODA. 
CAMBRIAN AND SILURIAN, 
116 
PALZOZOIC. 
CAMBRIAN. LOWER SIL. _ UPPER SILURIAN. 
Ape SSE BES Sie 2 
SPECIES. ee lele| Sls Slee eile REFERENCES. 
eae shee ale eels 
HSS 4S SS EEE RSP IEE 
Trochonema (continued). 
— triporeata ...... MESOYI sesanerea| acc) acallees| tec fecal ese al earl a Euomphalus, Brit. Pal. Foss. p. 299, t.1 K, f. 37, 38. 
— trochleata ...... UG OL Ae eetonaacel leh tocol fac] lose lapel (oe x | «dx Turbo, Synop. Sil. Foss. Irel, t.1, f..9, p. 12. 
TURBINIDE. 
HOLOSTOMATA. 
FEYOCHUS: .<;--0 0-45 Linn. 175 8...... 
— celatulus ...... DUB Cf esececep| tos] 56) nok (64) (asl eeo| aol Ieee (eo x |. Brit. Pal. Foss. p. 296, t.1 K, f. 40. 
— constrictus ...... EI GOF ce8oc60c5}) 00 fas5|[s001|G04) 86]|c0o| foe] [see [bce] foot foo Vide Holopea striatella. 
— helicites ......... ISDS cpatanccneon| local fee 365) [ood foot! loca! Iss faod lca) [ocd jean| focal a0 Vide Platyschisma, 
— lenticularis ES{OU-B) s popeab 0500 lene apa Inca fae) [Sc5| ieoo| [aed ae (cr Vide Raphistoma. 
mast (ees lh) alls Brit. Pal. Foss. p. 297, t.1 L, £.18. 
acd bec me lheales Synop. Sil. Foss. Irel. p. 15, t.1, f. 14. 
TURBINIDE. 
NEUE DOsarsessesee sets Linn. 1758...... HOLOSTOMATA, 
— carinatus ...... ISTE na5neaqdocod) ped lesa] [onal load eal |eoel| onl zed lo0q] [2501 [sell soel}o00| hae! faoo! [cel la Vide Euomphalus. 
— corallit ......... {S(O eee enencese (eee lloc| aap kaoe| (eect [ood] aso] IGec] (aocl Iasa| fines! loan| eset ase| seal acl |g Vide Cyclonema. 
— cirrhosus......,.. IS(029), “6ca§56006006) [onal |6ocl/aed lane] loool lane} (ode [ce4 aas| local a46)foon! |oanl lace 668) loool fo Vide Eunema, 
— erebricosta ...... MSC OY rece nessiiers| teal ee sea eel peal| ees eae pel cal lsee Vide Cyclonema. 
= CUOMPRBIOULES ™ Fortes cnceeenacaetei ea, sAleeal eed coed sales Nee sHeaeecloce lees [eee ese eae ieee lees lie .|" Doubtful species. 
— PryO@ cc vcccrss- S185 3009002000) |acellbsalloo-llce| loaal eellocel [ser kano} 600! |aAlao6l lose Vide Murchisonia. 
— rupestris......... TEA CHAD SM veaveciace|(seallinee loa lieee Weal ee eile Geol. Surv. Irel. Expl. sheet 35, t. 10, f. 5. 
— tritorquatus ... M‘Coy .........|...J...[.00fecefees % ilk «| * Synop. Sil. Foss. Irel. p.12, t.1. f.8. 
— trochleatus ...... MES OY co ceces Noee|leea| tes ef ase ael Seeloae lec loee eae Vide Trochonema. 
— Williamsii...... ISLS stnconacorAl | sen lope| food od (25H [Sbe| [aa |54 feed lene fecel oa| oer Vide Platyschisma. 
