PALOZOIC. TBITRY HA ONSET 0) 12 OID AN. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
sie : a SISlEISHlelglele 
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SPECIES. SSE ls] lS| Sle S24 (SIEISIS] « REFERENCES. 
HESS] ole] slolsisl8]Slelelal.|s 
“| 8] SPSlElSle lls lelelelalgizle 
ais /s(22 Sls |Shaic (212/68 Sl aS |S 
MISIAISISIRIS SID FIFE IEIA|<a]5 16 |e 
Rhynchonella (continued). 
= OPEV OSENES si cccavsoiverdousnereaes use| od) foo Iban) [Joc pol jee] |e dal [oom tAeoa|scr|are|svsler|ees|oee] ede i idehexa. 
— compressa ,..... SGlEs0 .cccensennes Hcl Soallaea pad [eos noel feed heel [ood ens |2e2|lse-|a|(ns|lonel sec|[e0-| Pee AtLymiss 
— crebricosta...... OWevexettvertens| er nesses (eee owe Boe eee deed los Boel bee eee|loae|eatellaee|iee| (us|) ee@emnven WaISOnIs 
— cuneata ......... I DAL eececespntce (00 p66 {ee fo ooo sales Pee a ee (ee ee (ee Terebratula, K. Vet. Akad. Handl. p.141, t.6, f.3; ib. His. 
Bidrag. till Sveriges Geognosi, pt. 4, p. 239, t.6, f. 3; 
ib. Leth. Suec. p. 81, t. 23, f. 5; ib. Sow. Sil. Syst. 
p- 625, t.12, f.13; ib. Barr. Sil. Brach. aus Bohmen 
Natur. Abhandl. vol. i, p. 80, t.17, f£.11. Hypothyris, 
Phill. and Salt. Mem. Geol. Surv. vol. ii, pt.1, p. 280. 
Atrypa, Hall, Pal. New York, vol. ii, p. 276, t. 57, f. 4a-r. 
Retzia, Salt. Siluria, 2 ed. and 4 ed. t. 22, f. 8; ib. 
Dav. Mono. Brit. Sil. Brach. Pal. Soc. p. 164, t. 21, 
f. 7-11. 
— crispata ......6. FREE EY Gachancgosee oon |Sed hae lead) (Ge) [sed kcal food) loacl a5| [ese aod leer Ina Vide R. Stricklandi. 
— Davidsoni ...... ME COP reves cca |isoel ies) {ne see) sta | ee sesfees[ese|oos[ocefene|eeelese[eoe[ee-| Var. Of R. Wilsoni (ezde). 
— decemplicata ... Sow. v..cccseeeee axle feee] P]o.|..].fee]..| Derebratula, Sil. Syst. t. 21, f£.17. Hypothyris, Phill. and 
Salt. Mem. Geol. Surv. vol. ii, pt. 1, p. 280. Rhynchonella, 
Siluria, 4 ed. t.9, f.15; ib. Mem. Geol. Surv. vol. iii, 
p. 287; ib. Day. Mono, Brit. Sil. Brach, Pal. Soc. p.177, 
t. 23, £. 20-24. 
— Gils ee 1S {6 FieEAerOTeaRod| Gon (acd (ded eed [osc |ccel epel ae Ince ale] x Terebratula, Sil. Syst. t. 22, f.14. TZ. brevirostris, id. ib. 
t.13, £.15. Z. spherica, id. ib. t.13, £.17. . inter- 
plicata, id. ib. t.13, f. 23. Atrypa interplicata, Hall, 
Pal. New York, vol. ii, p. 275, t.57, f.2a-g. TT. deflexa, 
Barr. Brach. Bohm. Naturwissens Abhandl. t. 20, f. 15. 
Hypothyris deflexa et brevirostris, Phill. and Salt. Mem. 
Geol. Surv. vol. ii, pt. 1, p. 280. Rhynchonella, Salt. 
Siluria, 4 ed. t. 22, f.10; ib. Dav, Mono. Brit. Sil. Brach. 
Pal. Soc. p. 178, t. 22, f. 24-27. 
= —UGDTESSE ei veesnte LESCOY, canessese s24| cee |lses| oc P eee |hes|=sa]essfeonleos| aon Vide Triplesia Maccoyana. 
—— OLA ING ceconee GUM sinevel se steas||t 2c (asel sere =frea| eee ache [pce Vide Meristella. 
— diodonta elfen loeel aa | Nas ecationsl tes|ees sJecfesefeee[oc[eeefeee] oe] ede R. borealis. 
— ? Edgelliana ... Dav. ............ Beal koe Neal eel ied Pel lle lane secleos[eee|ec]sce]eecfeee]ee.| Mono. Brit. Sil. Brach. Pal. Soc. p. 190, t. 24, f. 27, 
28. 
— Etheridgii ...... Dav. MS. ...... eA lace (eee Ieee lac eileen hee [ee vecleca[ooefece[.ce[eee[eeefe.| ade Atrypa apiculata. 
— furcata ......... ING Geoncaeouns er [Beal eee Ieee oan Sc: |tecalllsaed ees goq| (oad) |ood joc Vide Meristella furcata. 
— Grayti veces Das. cts aca eel eee eee ee Sood eel 3 : Vide Atrypa Grayii. 
— hemispherica,., SOW. v..ccccceees Bed [aaa (sca feel Fae aaelhac| lene! (aco Sapte Vide Atrypa hemispheerica. 
— interplicata ... Sow. .....cscees fee BectlScel eee loge bad see laBal (coe Weal cuelesclessleelicacleecthee| ede ke. deflexa, 
— lacunosa......... NOW” cee sesensncaltse- pa ere (eet (Bel lee ee legs baeke safecs|soe[eoe|eee[oo.[ 22] -..| 72@e R. borealis, 
— Lewisii sh daddcocer est as Pell cical eae anes lineal east ae a x }...[...Jc..[e{--.| Lerebratula, Bull. Soc. Géol. France, 2 ser. vol. v, p. 330, 
t. 3, £. 30. Hemithyris, M‘Coy, Brit. Pal. Foss. p. 203. 
Rhynchonella, Salt. Siluria, 4 ed. p. 226, Foss. 58, f. 2; 
ib. Lindstrém Gotlands, Brach. p. 366; ib. Dav. Mono. 
Brit. Sil. Brach. Pal. Soc. p. 180, t. 23, f. 25-28. 
Peseoooocees| ee fane| (eee ined ee foc Siluria, 3 ed. p. 527; ib. 4ed. p. 210, Foss. 49, f.1. <Atrypa 
serrata, M‘Coy, Synop. Sil. Foss. Irel. p. 41, t. 3, f. 29. 
Rhyncho. Morris, Cat. Brit. Foss. p.147. R. Llandoveriana, 
Day. Mono. Brit. Sil. Brach, Pal. Soc. p, 184, t. 24, 
f. 8-13. 
Pia saiecseas SGU. a.aase toutes [ace] neal css| so<[/scallses Day. Mono. Brit. Sil. Brach. Pal. Soc. p. 192, t. 24, f. 26. 
(Salter, MS.) 
accenconncds 22 AA EL eace cons) pact |occ| lace [aed lace] ooo) 3 | Le} (aac! [aa fpge face aod jeu) Fea fon Hemithyris, Ann. Mag. Nat. Hist. vol. viii, 2 ser. p. 3933 
Brit. Pal. Foss. p. 206, t.1 L, £..4; ib. Dav. Mono. Brit. 
Sil. Brach. Pal. Soc. p.173, t. 23, f.19. 
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