PALHOZOIC, CONCHIFERA. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
| : | Eee ; 
] a S| Pallas] e |e! ius! 12 
=! |g alelelsisielelelel? 
| el |e Ale |2 5S 218 |5|s |e 
Ald Lal pes s|&/e = RD = 
SPECIES. alelals] (Siclale sess lalelstsl. REFERENCES. 
a) elsle els Sits |s)81 8) s18) els] 5 
(S/S STEER lef iSlelelPl el Sela 
e/a S = : Ele) alo] ¢ 
S/S) 2/27 E IS] 8) opens if )2)e) el ais] 3 
MIB IRSISIAISIAID IE IF IE IA laisia la 
LAMELLIBRANCHIATA. 
Order, Isedrolotila M*Coy. 
Pelecypoda,., Goldfuss. 
Group, Dimyariu. 
ASIPHONIDA, 
Actinodonta,........ Phillips, 1848..),..|...|..<{...[--- Sc [Bod aod [456 see[ees|ees[oae]see[eee]ee-[...| Vtde Lyrodesma. 
MYTILID®. 
Anodontopsis ... M‘Coy, 1852... 
— angustifrons ... M‘Coy ......... Baa eel rod ipa eae Pe eee ae CB tel ecolisee|ace|ees| (eee ees] Jorib. Pall (Hoss, p 270, t,x Ki fir, 15)-ciby Anne Map. Nats 
Hist. vol. vii, p. 54. 
DUN A bivcceeacese WOO erence Sec kane ee [Bart ice vee[aceece[ ak [eee] eoe[ece[eselee-] | |---| Brit. Pal. Foss. p. 271, t.1 K, f. 11-13. © Zweina, Synop. | 
Sil. Foss. Irel. p.17, t. 2, £1. Anodontopsis, Siluria, 
4 ed. p. 229, Foss. 61, f. 5. 
— levis ........600 ISLETS Gaancdecoaod [sed laced load aod losel [al eee [oe eee «| ?|...| Pullastra, Sil. Syst. t. 3, f.1 a. Anodontopsis, M‘Coy, Brit. 
Pal. Foss. p. 271. 
a CTE PR parece -2 aA Snes an eOReiH (ral tort nel eet Weal seal (eal cet [eee * Mem. Geol. Sury. Geol. Edinb. sheet 32, p. 140, t. 2, f. £4. 
= BDOLOVALS a aeone re OGUGei tyrasencssonaliecs| sea] ts |lece | eel sericea fas pail eed Mytilus, Mem. Geol. Surv. vol. ii, pt.1, p. 363, t. 20, f. 2. 
——EQuAadratOs: 5.751 OOY) ceecdsevelnea|ce [level eec[ eee x | x Brit. Pal. Foss. p. 272, t.1 K, f.10. Mytilus, Salt. Mem. 
Geol. Surv. vol. ii, pt.1, p. 368, t. 20, f. 1. 
— securiformis ... W‘Coy ......... ded) fond! noo sat jon sealleaal lesa] oe sesloes[oee] ge [eee] a [eee{es-| Brit. Pal. Foss. p. 272, t.1 L, £. 9; ib. Ann. Mag. Nat. Hist. 
| vol. vii, p. 55. Modiola, Port. Rept. p. 425, t. 33, f. 8. 
(Pseudaxinus.) 
ARCAD®. ean 
PATO ace isaa ses ae Trimm, 1758.....: 
Ctenodonta (part)... Salter,1851 
Pectunculus ,,, Authors ......... 
Ss NIDA. 
Nucula (part).. Authors v.00... eH ONT DS 
— Apjohnni ...... BEIT eeenregee cond teed lone sae (eed (see | God loos seclesclevslece[ecc|eee{eee{ee.| Dectunculus, Geol. Rept. p. 429, t. 34, £.8. P. ambiguus, 
| ib. p. 430, t. 34, f. 11. 
— ambiguus ...... Portlaeevesress Beal Sealiece eal ee Bee [mera tees bee es | ee | ee eel ee | ee lee eel e@erAceA py ohnnis 
— eylindracea .., Portl......0...... wct| eal Bes eae [eae weal alla a ual leeeleaa|ac|leeslfece es Vide Ctenodonta obliqua. 
— dissimilis ...... ERO ppapesnod fe ool SEPA AAa Pe bal elles Vide Ctenodonta dissimilis. 
— Eastnovri......... AED cetesponca eel ae ele ne De Le Vide Ctenodonta Eastnori. 
— Edmondiiformis M‘Coy .........|...|...).0.|e0f.. eee [Bs A * Brit. Pal. Foss. p. 283, t.1 K, f. 2, 3; ib. Ann. Mag. Nat. 
Hist. 2 ser. vol. vii, p. 52. 
— ? Naranjoana... De Vern. ...... ped leed laa lear (Bee sod lee (see vecleccleccleee|eee{ecc]eee]e..| Bull. Soc. Géol. France, 2 ser. vol. xii, t. 26, £.12; , ib. Salt. 
Q. J. Geol. Soe. vol. xx, p. 300, t.16, f. 8. (Budleigh 
pebbles.) 
— obliqua ......6 POrtlicn nesteais: eel ere| ce) hes ose Rea lece lees lene secfess[ace[ece{eee{eeefeee]...| ede Ctenodonta, 
— primitiva ...... TAT Ssseooncuce ea Pen bee eee er veclece{ees] B[eeelece]ecefecefecefeeefee-[...] Mem. Geol. Surv. vol. ii, pt.1, t. 21, f. 5. 
— quadrata ...... WOOT “ceppecno ae joel loool food land acl facet aed oe me llowelleas [eels | Peel ees| eee'li] 
ED regulars areal 
regularis al one foe 200 |éael ae lope asa ee less | ees | Fede Clonodonta: 
— semitrUncda .....cceecccserscceerers evelecelesc|iastl eee Secliess less [ess rac | ee : | ES 
— scituld..........6 DM Copies ster Ad |Gec| long) [ened [ens Soc eel lead Hee Ang Bed) ocd (opel seed [ded loos fac) 
— subzqualis ...... MC Ot mate noel sed eee eal Lae secfecelecel og [eee] ae [eneleeeleee] x [---[-..| (Byssoarca), Brit, Pal. Foss. p. 283, t.1 K, f.1. ? Arca 
Z Eastnori, Sil. Syst. t. 20, f.1, 2b. Ctenodonta sub- 
wqualis, Siluria, 4 ed. t.10, f. 7, 8. 
— subacuta......... DECOY) sseteoacs| o50\'-n teal toe cet ? Nucula, Synop. Sil. Foss. Ivel. p.19, t. 2, f. 3. 
