PALZOZOIC. BRACHIOPODA. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
FF — 
=| | Slee lala siSl ele lg 
2\_l2|.| | Re RER Ee 
SPECIES. slalals|(slslalg lees eiaisaiel. REFERENCES. 
DE ls ls e|SiAisls/S/Slelelelsl|s 
S/S EPEISTS lel lSlele|e|s/2)3\ 2 
alS/el2le\s/5/Slabele,2/6 |e) B81 3 
HISISISISAISHPERFIEIISib ale 
Orthis (continued). 
— sub-levis ...... DS COY ersseveeforefersfeesferfers 20) [09] fee} boo seslecefecs|eee]erfoeelere[.ee! Vide Strophomena deltoidea, 
— testudinaria .., Dalim... fe eo no) fer) food Kf | Pk fe feeefeee[oleee|auleee|eeal Wet, Akad. Handl. Stockholm, 1827, p.115, t. 2, f..4; ib. 
His. Pet. Suecica, p. 71, t. 20, f.11; ib. Sow. Sil. Syst. 
t. 20, f.9,10; ib. Hall, Pal. New York, vol.i, p.117, t. 32, 
f.1, and p. 288, t.79, f.4. O. striatula, Salt. Q. J. Geol. 
Soc. vol. xv, p. 380, t. 13, f. 14-16; ib. Mem. Geol. Surv. 
vol. iii, p. 340, t.13, f. 10-14; ib. Siluria, 2 ed. p. 74, 
Moss. 12,°£.16,t. 5, 4.25 1b. 4.ed. p: 68, Hoss. 1350-6216, 
t. 5, £.1, 2: Dav. Mono. Brit. Sil. Brach. Pal. Soc. p. 226, 
t. 28, f.13-24. O. test. Billings, Geol. Canada, p. 165, 
f. 144; ib. Nich. Pal. Ontario, 1874, p. 16. 
— triangularis ... Sow. ..........6 aod eal |a54) lobe |a06 Fs Ipod lene Ibo ves[ecrfeeel ses [een|eoe[ere|ooo] SUL. Syst. t. 20, £.17; Salt. Siluria, 4 ed. t. 5, £.13; Day. 
Mono. Brit. Sil. Brach. Pal. Soc. p. 277, t. 38, £. 27. 
— tricenaria ...... Conrad ,........ sat||sa2|{o0clfood loc ves[oe | xe Peee]eeefece[eee]oce]eeel.ee[eee[oee] Proceed. Acad. Nat. Sci. vol. i, p. 333; ib. Hall, Pal. New 
York, vol. i, p.121; ib. Billings, Geol. Canada, p. 167, 
f.151; ib. Dav. Mono. Brit. Sil. Brach. Pal. Soc. p. 276, 
Ve t. 38, £. 28. 
— turgida ......... IWISCOE orpasosne o3| (Gael cealfoud lane | | ok feee[eee{eee[ece]ecs[eee{eee[eoefeee] Brit. Pal. Foss. t.1 H, £. 20-24, p. 229; ib. Dav. Mono. Brit. 
Sil. Brach. Pal. Soc. p. 258, t. 22, £. 12-20. 
— UNBUIS........064 S175 Mencionomnace pot| aed) |a80) fase bob S69| £3! ase ond ser[eceloee|eve[eerleos]oee]...| Lerebratula, Sil. Syst. p. 640, t.21, f.13; Siluria, 4 ed. 
t. 5, £. 3,4; ib. Dav. Mono. Brit. Sil. Brach. Pal. Soe. 
p- 257, t. 37, £.16-22. 
— undata Bee ets npellaocthood [acs sea[ece[eae|oee[eee[ece[eee|ee-| 72d@e Strophomena deltoidea. 
— undulata Bleed [aso on||a00| lobe ao see[eeefece|sacfees{eee{eee]ee.| ede Strophomena corrugata. 
— Valpyana ales sae PI) P| PL. ...[eee].efeeefece]eee|ee.| Mono. Brit. Sil. Brach. Pal. Soc. p. 235, t. 32, £. 29-333; ib. 
~ Q.J. Geol. Soc. vol. xxvi, p. 83, t. 5, f. 23-25 (derived). 
— vaticena selena lose bec eal asa lan veo[see[evelece|eon|ese[eee]eee| ede O, lenticularis. 
— vespertilio Palen ies HK || fecelenefece{eoe|eee]ee|eecleve|eee] SLL Syst. t. 20, f.11. O.bilobata, id.ib. t.19, £.7; Siluria, 
4 ed. p. 69, Foss.13, f. 7, t.6, f.1-3. O. vespertilio, 
M‘Coy, Brit. Pal. Foss. p. 230; ib. Dav. Mono. Brit. Sil. 
Brach. Pal. Soc. p. 236, t. 30, f. 11-21. 
— virgata vii. SOW stahsceacrit Fool sl fase lege [acta Fealewallece leet ves[stefeee[ecsfere{eeefeee[ee| ade O. calligramma, var. virgata, Sow. 
a Witerineh Boacronss DGS hcmekanared Weal eaters how PIP PY... ce].efeee{eesfeee{eoe]eee| QJ. Geol. Soc. vol. xxvi, p. 84, t. 5, f. 20-22 (derived). 
=. is Giteatoronsc SATE seen Pe eal tac Fae (Pal tec [boa fod (ce PF Pal eee ve Ul Peal eg Mo Geol. Surv. vol. iii (Geol. N. Wales), p. 338, t.11 B, 
14. 
ORTHIDE. 
Orthisina ......... D Orbigny,1849 
Promtes .....0... Pander, 1830... 
— adscendens ...... PaNdePr coccccres ned con|eadleaddees sel] P].|.../...[.ee]eeefeesees[oee|es.| Patondtes adscendens, P. plana, P. rotunda, P. convexa, P. 
: praceps, P. tetragona, P. lata, P. excelsa, Beitr. zur 
Geol. des Russ. Riches, t.17, f. 2-6; t.18, f.1-5. Orthisina, 
M‘Coy, Brit. Pal. Foss. p. 231. Orthis adscendens, V. Buch, 
Mém. Soe. Géol. France, vol. iv, p.211, t.2, f.10. Onrthis 
adscendens, D’Eichw. Urwelt Russl. heift. 1, p. 15. O. 
pronites, heift. 2, p.145, t.4, f.1, 1842; ib. De Vern.and 
De Key. Geol. Russ. vol. ii, p. 203, t.12, f. 3. Orthisina, 
Day. Mono, Brit. Sil. Brach, Pal, Soe. p. 278, t. 49, f. 27-29. 
MS COLLC LM ceeeraatoniene: seusevectt ese Petal eel areal lf sa6]|s0¢}foee [ao sisfese[eeefece[ere[eeefeee| ee] ede Orthis calligramma. 
RHYNCHONELLIDE. 
Pentamerus ...... Sowerby, 1813.. 
Gypidia ...... Dalmann ...... 
— Aylesfordiit ... SOW. ...ccc.s000 gers eal (exter [tae oe) [detec fare sasfecs|oee|ece|ere|sve[ees[ee.| Pade P. Knightii. 
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