PALZOZOIC. Bay AT CE OREOMD PAC CAMBRIAN AND SILURIAN. 
| CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
a 2s eS al elPal SIGH 
=| lel | | (elEVEIElSlSEELE|2 
A\cle|.| |.(esiseemielcsle 
SPECIES. sllale| Sl claleleeialealsl a, REFERENCES. 
Ae lel sl Sis lS RIAs iSleislsiale|e 
B/ElPBPEEIS/ElaiS(S/SIEIBIEIE (2 
TISISISIS IRIS IBID IE IE IE IA ID 16 |e 
SEROMUOLOM Mc aatecslesveccseoeancsase seeks 
— depress ,........ IADR cagncteceo5: Ban} load} [or=} trae [aod fae] |ne6! Faocl [ee seq [bee |o50) [26d laps] [oco) aoa 0 Vide Strophomena rhomboidalis. 
Pseudocrania..,.... M<Coy, 1849... 
Crania v. Retzius, L781... 
Orbicula,..... ... D’ Orbigny,t789 
EPG BOCHONIG, vavudavenosees ganas 
—OLVANICALG wedeeaedtwaseataaseedneqess pee bea ocel ieodl Koa mel onal sod EES sec[eas[ees[ees[eceleee]ee-[-e] Ve@e Crania divaricata, 
SPIRIFERID®. 
ROGAIA conv eecceocves King, 1849...... 
Spirigera ...... D? Orbigny,1847 
Rhynchonella (pars)... Auct. ... 
— Barrandii ...... IDOE seonoriopoane 04||en8) {calle oor 800)|enn\loo4) oe x |x| x leee[eleec[eeelee] Derebratula, Bull. Soc. Géol. France, vol. v, 2 ser. p. 332, 
t. 3, £.32.  Rhynchonella, Salt. Siluria, 2 ed. p. 250, 
Foss. 57, £.6. Retzia, Day. Mono, Brit. Sil. Brach, p. 128, 
t. 13, £. 10-13. 
— Bailie I BCEE, “aagnobocobos nor|tonolload| land) [aes Sc4l|poolfonct [cod asi| esl sees | eot|| eee eealese|| Mann Obeky.saltert, 
— Bouchardit ... DO. wiscciee odicl|nealfoad| fase [oor fad aoa lock] ob stin| 66] fen4| aoe lobo sen[lees|ees| Var. OF R, Salteri. 
— Salteri............ DW wivsecseaess Bealtasal aoa led eos 505 (bos eel (ace poalleeel esl S04\ loa ...|...|.-| ZDerebratula, Bull. Soc. Géol. France, 2 ser. vol. v, p. 331, 
t. 3, f£. 31.  Retzia, Schmidt, Sil. Form. Ehstland, &e. 
p. 212. R. Salteri, Siluria, 4 ed. p. 226, Foss. 58, f. 7-8. 
Var. R. Bailyi, Dav. Zereb. Bull. Soc. Géol. France, vol. v, 
2 ser. p. 330, t. 3, f. 29; ib. Mono. Brit. Sil. Brach. Pal. 
Soc. p. 127, t.12, f. 23-25, 27. Var. R. Bouchardii, Dav. 
ib. p. 332, t. 3, £. 38; ib. Pal. Soc. t.12, f£. 26-30. R. 
Salteri, Day. Pal. Soc. p.125, t.12, f£. 21,22; Siluria, 
4ed, p. 226, Foss. 58, f. 7, 8. 
= PE Sen enonotigsonnesebonosncucned Sue (sce laeallene fleets bce ancltnod) joes sesfecefecc[ace[eoelecs[eeefeee] ede Rhynchonella. 
RAYNCHONELLIDE. 
Rhyncehonella .., Fischer, 1809... 
Trigonella ...... Scher! sectecoss 
Terebratulites.. Schloth, 1820,.. 
Cyclothyris ,., M‘Coy, 1844... 
Hypothyris...... Phill. 1841 
Hemithyris... (part) D’ Orbigny 
M<Coy ... 
— mmula..,..ccrcoee SE Se sonoopgaco ar ee ipl ee) ae neal: land (boo sac[oesfece|eeelece[ece{oeefeee] Cat, Ross. Mus. Pract. Geol. p. 7, 1865; ib. Dav. Mono. Brit. 
Sil. Brach. Pal. Soc. p. 188, t. 24, f. 21. 
4 GN GUSTR MONS Mi antessteey vascenecaeeal see |oeel cea ena orl el iseallleae [owl sna ease wee[eee[eee]eee[-es| Vade Meristella. 
— apiculata Ba ee eco sS¢|\30c) (aod) Joon 560 pcelfopal Sool analloocllonat|soc|) Leta Nina n et 
— Barrandii ed |aao| (ena oor Hen Sadtecollobd [obo sualless|lece|see| soa] aeefae|ees|| e@e IRebzia. 
— Beltiana ......... TREE scpceberonen Be eee! eee eer ed seslecefeeel ok [--[eee] ae [-ee[-ee[eee[eee]---] Mono. Brit. Sil. Brach. Pal. Soc. p.189, t. 24, £. 22: 
ppnoO S205 gonesnocticc| pot lasél oeel|nod [seollasellooaltoad [ooo Vide R. borealis. 
sosnlccesteleasalncalne| teat otas Pala he Terebratula, Dalm. Schloth, Systematisches der Pet. Samm- 
lung, p. 68, No. 88; ib. Von Buch, Mem. Soe. Géol. de 
France, vol. iii, p.171, t.16, f.15. er. plicatella, His. 
Leth. Suec. p. 80, t. 23, £. 4. Tereb. lacunosa, Sow. Sil. 
Syst. t.12, f. 10. 1. bidentata, Sow. ib. t.12, £.13 a, 
Hypothyris borealis, Phill, and Salt. Mem. Geol. Surv. 
vol. ii, pt.1, p. 383, t. 28, f.9-14. Tereb. plicatella 
et diodonta, Dalm. Vet. Akad. Handl. p.140, t. 6, f. 2, 
4. R. borealis, var. diodonta, Salt. Siluria, 2 ed. t. 22, 
f.5. R. borealis, Dav. Mono. Brit. Sil. Brach. Pal. Soc. 
p-174, t. 21, £. 14-27. 
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