PALXOZOIC. CONCHIFERA. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
S| |é Ae Beene 
ES alle Jefe icing igis 
SPECIES. Tlelels| (Slclslgleisisialeialal REFERENCES. 
HVS lalSlw Si SiajssiS/Slslelalsl = 
FREE BEE eSeeEEEEE 
a|o|.2| 2 S18/S anc | lot | es 
BISISIS[4ialS IPF EE lee 
Leptodomus (continued). 
— amygdalinus ... Sow. .........45- a) eee! eco! feel (eee) ace) ieee fee) fe 7 
— globulosus ...... MS Coy nsec cteve ho|/955 one [eo (See 54 (beal cel Bee 579) el fae) 09) lade [Sd hse foo 
— impressus ...... BYES jeconeneetcs £594 669) feo) jecd| loss Sol 96) foe Wipsdal Orthonotass 
— truncatus ...... UE COU) nena eo Are keel Bea lace aoe el eele olen Rd (oa) eel acl eect eel [easel aoa | 
— undatus ......... WOON ence aces aed es) esl aes lose see[eee[oe-Pooe[oes|aeelare[ers[ore|erelene|oee| | 
CARDIADE. 
Lunulacardium,.. Miinster, 1840.. 
Coaccar die BaOum, 583502 SIPHONIDA (INTEGROPALLIALIA). 
Pleurorhynchus Phillips, 1836.. 
— aliforme? ...... SOW: ieeceescess ots few | (eles mallee [ss selec] Pl x [eecfeeleetee| Cardiwm, Min. Con. t. 552, f.2. Plewrorhynchus, Phill. 
Pal. Foss. Dev. and Cornw. p. 34, t.17, £. 51. Cardiwn, 
Sow. Geol. Trans. 2 ser. vol. v, t. 56, f. 2; ib. Goldf. var.a, 
t.142, f.1. ? Devonian. 
— elegans ......... GER casepartneen Ped [eed] seed Isat (ase Saul aealtced EE vc[aseeceeeefeee] x [-o-[---| Mem. Geol. Surv. Expl. sheet 32, Geol. Edinb. p. 139, t. 2, 
f, Io. 
TRIGONIADA. 
Lyrodesma......... Conrad, 1841... 
Actinodonta ... Phillips, 1848.. ANSTUEHLORIUD YA 
— celata............ SLE eeeccriensss 555 [o05) coal teed lace nol | Pi lead [ese verfeee|essfere]eee{eee[ees[ee-! Q. J. Geol. Soe. vol. xx, p. 300, t.16, f. 7. (Budleigh peb- 
bles.) 
— cuneata ......... JES copecpiceo0ee) [aca hoa od face] loos * Actinodonta, Mem. Geol. Surv. vol. ii, pt.1, p. 366, t. 21, 
f. 1-4. 
— plana? ......... Conrady cenccess||a.| eee] eet ese eee Pleo bee Ann. Geol. Rept. and Pal. New York, t.82, f.11; ib. M‘Coy, 
Brit. Pal. Foss. p. 272, t.1 K, f.17. Lyrodesma, Siluria, 
4ed, p,196, Foss, 39, f. 5. 
CYPRINIDE. 
Megalomus......... Hall, 1852...... SIPHONIDA (INTEGROPALLIALIA). 
SSDS ascnsonpoacaced INI pacepnoond 5e¢}[o0n|lo04 (Boel babi vee[ oe [Pee feoleee[eeeleee}eesfeeefee-]-o] Siluria, 4 ed. p. 196. 
Modiola ............ Lam, 1801 ...,.. Pee Pee label (ated Fate Beal aap Wee Hee vie[ess{es[eoe[ee[ee]oe[ee] Wide Modiolopsis, 
MytiLipm. 
Modiolopsis ...... Hall, 1847...... 
Pullastra ...... Sow. 1827 ...... 
Modiola......... Lam. § Authors 
Mytilus ......... Authors ......... 
Cypricardites... Conrad, 1841... ESTE LOL REDE 
— antiqua ......... SOW caseriswsess necllssaices|loncl ss wee] x [eee xe |eeel oe |e feee]eoe[-2e]...[...] DZodiola, Sil. Syst. t.13, £.1. Modiolopsis, Siluria, 4 ed. 
t. 23, f.14. ? Modiola vetusta, Miinst. Beitr. 3, p. 56, 
Gada ste s 
BAT IMOTICH cece esr ND lLe, sees acters seal eee ace |eeal eee hewe| ese EF load Wed loeg| lene (eee wlileee[..{..-| Q. J. Geol. Soe. vol.xx, p.297, t. 16, f.1. (Budleigh pebbles.) 
== ASC repedpenee core SULA 4 Brscpoebcooges| hoa sec] asa lace ack | (eer lan Modiola, Geol. Rept. p. 425, t. 33, f. 7. 
— Cambrensis 34 loee [coal eee koe] Heel loge! lone [aoe Q. J. Geol. Soc. vol. xxix, p. 50, t. 5, f. 20. 
——BCOMPIANAGH 10556 SOW. evecssiasses|(eal see anal |sae] ao) sce liceal een > oe i Pall, Pullastra, Sil. Syst. t. 5, £..7. Modiolop. Siluria, 4 ed. t. 23, 
f.1; ib. M‘Coy, Brit. Pal. Foss. p. 266. 
= EX PANGS -osseea- LOPE a sesenceeanaleoaiten| ces ece psc # lle [oor ee Modiola, Geol. Rept. p. 425, t. 33, £.6. Pullastra speciosa, 
M‘Coy, Synop. Sil. Foss. t. 2, f. 2. Modiolopsis, Siluria, 
4ed, p. 196, Foss. 39, f. 2. 
— gradata ......... SOlbiy sivcscostans|sonttee ese ese does Ps bea ee el laellise * Mytilus, Mem. Geol. Sury. vol. ii, pt.1, p. 363, t. 20, f.3-5. 
Mytilus, M‘Coy, Brit. Pal. Foss. p. 267 (under M. Nilssoni). 
Mod. His. Leth. Suec. t.18, f.13. Modilop. Siluria, 4 ed. 
p. 229, Foss. 61, f. 8=M. Nilssoni, His. 
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