PALMOZOIC. CONCHIFERA. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
=| le s/elelelelelelal [8] | 
Us to Blz]e Bla al\elel6/2 
2|alE|. Lissa rers|é 
SPECIES. slalals! SIClels| Sle Mm ISlIPlS ial. REFERENCES. 
“/S la |'s| 2018/8 (Als |= 8|58 ne BiB Ey 
e |S Sele ISleletetelelelglslele 
S/O) ERS IS S| SPAS ISLS 1S |e) ala | a 
TEI IA SSIS iE IE IE RIS 1B | 
Orthonota (continued). 
— nasuta............ Conrad ......4.. Bre! foo0| [50] lonc| loo ge | Ila face ses[eocfecefece[eeeleesfeee|ee| Cypricardites, fide Hall, = Modiolopsis, id. Pal. New York, 
t.18, f. 2, Orthonota, M‘Coy, Brit. Pal. Foss. p. 275; ib. 
Salt. Siluria, 4 ed. p. 59, Foss, 13, f£.12. 
— obovata ......... Miinst. ves .usss ro (Berd ecm oct (ce peel lal aia eae Pl .Jiefeefieleeefee|e..| Sanguinolaria, Beitr. heft 3, t.12, f.29. Sanguinolites, 
M‘Coy, Synop. Sil. Foss. Irel. p.17. 
— PFOTA ....eceveees SGlitey Recssceepses 660! sei [coal eed (oer $60) (soc|{55c oor ves[eee[esefeee]ooo] a |---[---] Siluria, 2 ed. Foss. 60, f. 4; id. ib. Foss. 61, f.4. ? Mod. 
semisulcata, Sow. Sil. Syst. t. 8, £.6. Ortho. M‘Coy, Brit. 
Pal. Foss. p. 275, t.1 K, f. 25. 
TS POTUSE ver eveserses BOW, serscrecrenslecs[ecelece|erefers|ece]ere]ecePece| eee Tide O. amygdalina. 
ci fetal enncanserigucril S| OC 55m taagecorodeca tenn ical col esl (sen aes * a * Psammobia, Sil. Syst. t. 8, f. 3. Orthonota, Siluria, 4 ed. 
hy OBE abe beh 
— rotundata ...... ISLOTIE eebeepaeaced [eco jae lesa aad lose P| x Mya, Sil. Syst. p. 613, t. 6, f.1. Orthonota, Siluria, 4 ed. 
ti Ae. is Ge 
— semisulcata,,..... WOW Faccvessees coo|1o55) labo lead) foes veel oe Jeced x Peles Modiola, Sil. Syst. p. 617, t. 8, f. 6. Orthonota, M‘Coy, 
Brit. Pal. Foss. p. 275, t.1 K, f. 25. 
— simplex ......... Portliccescccosces scallaaalberlloeadioes pool esl aac lod ses[ase{ecsfece|easfeee{oes{ee.| Cypricardia, Geol. Rept. p. 426. ? C. impressa, Sow. Sil. 
Syst. p. 609. 
— solenoides ...... OW! s tec toae en] ean tle aga eealirsal lise Allg llae Cypricardia, Sil. Syst. t. 8, f. 2. Modiolopsis, M‘Coy, Brit. 
Pal. Foss. p. 269. Orthonota, Siluria, 4 ed. t. 23, f. 9. 
— sulcata......,..... 17 OB enema 0do05 Fp ao0) (ae (aed) (Ger Sad] oH lobe aoe seclecefeesfoes[eee{ece]oee[eee| 2 DWecewla, Leth. Suec. Supp. vol. ii, p. 3, t. 40, f.2. Cfeno- 
donta, Siluria, 4 ed. p. 530. 
— triangulata ... Salt. ...sccccee G05 load Ibex] level [a0 Sel lace eel (ace seslacc[esefece|eee{ecs[aee[...| 7éde Grammysia triangulata, 
SLOT aasponcden MOG? Godoadneel bac ecsl osallssel Iseol|saallooalfane| Issn all lle Leptodomus, Brit. Pal. Foss. t.1 K, f. 21, 24. 
= sundatareeteee 7 Peel eee [kel [a i (elite | ses[ecsfeeefeee|eee] ae [eee|-.-| Cypricardia, Sil. Syst. t. 5, £.4. Leptodomus, M‘Coy, Brit. 
Pal. Foss. p. 279. Orthonota, Siluria, 4 ed. t. 23, f. 4. 
— versimilis ...... SQUES Aeesscecccse locale eaadee. Alles baer Geol. N. Wales, vol. iii, p. 271, MS. 
ARCID®. 
Palwarca............ Hall, 1857...... 
eleeree. Gastar ASIPHONIDA. 
Cyrtodonta...... Billings, 1848.. 
— amygdalus ...... Salt. # [esses aacflsas Mem. Geol. Surv. vol. iii, p. 344, t.11 B, f.17. 
— anglicd vi... ISAES “Gorrpoqaoqco|fese| |cos| os [ooe| land [Boel seul eee eel ed [eee ce Vide Redonia. 
— Billingsiana .., Salt. Sid eed eos Seal nes s20\ |e |ldod ee vis[acsfece[ece{eoefoee|eee]---| Mem. Geol. Surv. vol. iii, p. 342, woodeut 12, f. 4. 
==" pula messes Salts) ecevecctes ae|| se eee eet Seal leed kee verfese[ece{eee{eae]eee{eee]ee.] Mem. Geol. Surv. vol. iii, p. 344, woodent 13, f. 3, p. 343- 
— Hopkinsoni...... SHACKS seuecensies 66 selec loaal eee! [acl cel (oty [eel fone lace Q. J. Geol. Soc, vol. xxix, p. 48, t. 5, f. 11. 
= MOGIOIANIS: wines OGlbe secsoreansecllerclieedtocaleedih.s Allegel| eal rae Mem. Geol. Surv. vol. iii, p. 343, woodeut 12, f. 2, p. 342. 
— obloidea ......... Re Hse kstael eee | ees eed | eed ine eel Q. J. Geol. Soc. vol. xxix, p. 48, t. 5, f. 10. 
—— | ODSCULAMacseesrenOGULeN lencececsiecn|/arclisenl en leeaton: et (aed Mem. Geol. Surv. vol. iii, p. 342, woodcut, p. 343, t.13, f. 2. 
— quadrata......... SALE receccteneed eral tall tecltee hea Fy ered eee P. (Matheria), Mem. Geol. Sury. vol. iii, p. 343, woodcut, 
1b SVS pda Bi 
— secunda ......... SOLES oratcea te ce ral eealccal onal cede lined (ead Q. J. Geol Soc. vol. xx, p. 300, t.16, f.9. (Budleigh peb- 
bles, derived.) 
— socialis ......... Ble enstoreeses oe lel [eel loa see oe Mem. Geol. Surv. vol. iii, p. 344, t.11 A, f.13; ib. Baily, 
Char. Foss. t. 8, f. 7. 
PUllastre ..0..000060 Sowerby, 1827 .|...]...|...].0-4.-. Sl Feel cec{cefeee{ece|eeefoce[eee{ee.] 27@@e Modiolopsis and Orthonota for species. 
ARCID®. 
Pectunculus 
= PRT goepscn CAGHT Ber A ROOSOD| OBA] (Po) eba| cod (sacl Weel hod wel Looe lane Vide Avca Apjobhnni. 
— Apjohnni ...... PW crccencnceee eellses||(ome Ser | load eelloce aclecel acelfoccllost lise] Mell owslloocl| eaeadeen: Apjohnni. 
— semitruncatus,.. Portl.........644. vatllevaleen BCH] (a0) [soe baal joed (esd fae leeel eae leno lade! onl fsal)as1 Vide Ctenodonta. 
a (ee (On ee P| || 2 | he 
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