PALZXOZOIC, CONCH LEER A. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
S a/Elolélslel:lél./& 
rg : ra ee 2iele| 2 
elle) | FEREERREL 
SPECIES. SSE ls] SS ele Ss SIS Eisele REFERENCES. 
MIlEISIS 9/o/S15/5/13/Slx}e -|5 
2/2] Sere /e le lelalslelslelalalela 
6] o].4 SENS ° 2) al 
BISISIGISIRIS SIP IEEE IS I< ip 1a a 
Modiolopsis (continued). 
— Homfrayi ...... WEA CKES wtwanvee sees AeA ero 6a) hee) (aac faec| acl badd ed su|leae| sce] eea)-c-]ens|aeeleee| @Q» Js Geol. Soc, vol. xxix, (p. 49, t..5, £. 10,07. 
== Siri Oe ES COU Mranenerens pee reel lone lees esa hel Penal leet 'sn0 vea|\aas| coal (eee) ces |ecel (eau| san aacib. all Ross: -p02003) tiaelu, ete tOs 
— levis wa forre fae Ecallosel lect tao Bat (esol oo secon ge [ee[e.| Pudlastra, Sil. Syst. t.3, £.1. Modiolop, Siluria, 4 ed. 
Us BV G BS Vs 
S—SIITAGUB) ce cescceres SG ieee ealleveliecal ec | ees 59 st nod Heo Beal Bellen ses[eesfeesfece|eee{ Q. J. Geol. Soc. vol. xx, p. 297, t.16, f. 4. (Budleigh peb- 
bles.) 
— modiolaris ...,.. Conrad ....e.0.: SBol Gee isc) doe! eee deal galt tering secfece[eccecs{eae[eee|ees|-ee| Hall, Pal. New York, vol. i, p. 298, t.82; ib. Pterinea and 
Cypricardites modiolaris, C. angustifrons, C. ovatus, 
Conrad, Ann. Geol. Rept. New York, 1838, 1841. M. 
modiol. M‘Coy, Brit. Pal. Foss. p. 267, t.1 I, f.17, 18. 
— NETE]L ...sicseeees MGMSE. ucceves Boal sal fooel es kerio ana el banel (aba serfeceleccfece{erelecclecefeee] Beitr. t.11, £.14, 1840. Modiola, Geol. Rept. t. 33, £. 10, 
p- 424. 
— Nilssoni ......... TPS. Mepeosonee COO eal lic ates felts [lea Bod boul Gel Kes ses} e fees] ok [eee] ae [eeefee-| MWodiola, Leth. Suec. t.18, £.13. ? Mod. antiqua, Sow. Sil. 
Syst. t.13, f.1. ? Myt. gradatus, Salt. Mem. Geol. Sury. 
vol. ii, pt.1, p. 363, t. 20, f. 4. Modiolop. M‘Coy, Brit. 
Pal. Foss. p. 267, t.1 I, f. 21; ib. Siluria, 4 ed. p. 229, 
Foss. 61, f. 8. 
— obliqua ......... SOW: Feansenvecece cata Salat es tec dees feeleweliaeal nee nigel lose Its ate fected eanel arate toate feta Avicula, Sil. Syst. t. 20, f. 4. Modiolop, Siluria, 4 ed. t. 7, 
feat 
— obliquus ......... ISGIEN eceessese st sealleed|evellwee see coo|| billed arc sesfeccleccfece[ece{eee]ees}ee.] Q. J. Geol. Soc. vol. xx, p. 298, t.16, £.5. (Budleigh peb- 
bles.) 
— orbicularis ...... SB cages acne Bad eal lone ose (ead woalxellece dead jee[ese[ess[ece|oas[ece]eee].-| Avsewla, Sil, Syst. t. 20, f. 2,3. Modiolop. Siluria, 4 ed. 
Lb Wy Bg Yo 
— platypbyllus ... Salt. ........, Seal lcacal Mteellis taf seal eee |iees| sere ee sesfecefece{ece]ooe] a | ]o.| Mytilus, Mem. Geol. Surv. vol. ii, pt. 1, p. 364, t. 20, f. 13, 
14. Modiolop. Siluria, 4 ed. p. 229, Foss. 61, f. 7. 
— postlineatus ... M‘Coy ......... Peal eel ne dias lee Bac es hese ao seslessfessfoce{sas|eeslece{ees| Orthonota, Brit. Pal. Foss. p. 268, t.1 I, £.22.; ib. Siluria, 
4ed. p.196, Foss. 39, f. 1. 
——) PYTUS! <.fcosesdons SGU. enessecoae Seefleesllemaloctedisas Bed ea eed fase see[oee[ess[eee|eee{eee[eee|...| Mem, Geol. Surv. vol. iii, p. 346, woodcut 12, p. 342, No.1. 
— Ramseyensis ... Hicks............ Boel scdlocl tea] ioneliens) ea ee) tare taleae|cadliedlccelece| en. 24]! (Qed Geole Soc vols xxix, 9p: 405, bass taba. 
— quadratus ...... ISGLGa leateeiccvene Fealiaea|socl seed sealenelicetl tcc leee ses[eccfece[eeelecs[eee[eee]ee.] M2@e Anodontopsis. 
— securiformis ... Portl.... Boo} 66 Ieeo! [eed ies fond Fel fleite|leeal eas secfece[ecefeee]esefeeelees|-..| 2@e Anodontopsis. 
— semisulcata,..... Sow. pee A Saltese se S| 60! eel [el feed eel (col laeel eee ...| Modiola, Sil. Syst. t. 8, £. 6. 
— Solvensis......... j Bar| eed) (one ie laael hol asctionel bce sacl lecs'llectileecllacrlleas|iseellecel Que Gel. SOC. VOl xxix. D505 U-hs) tn RO, COs 
— speciosa ......... van|lcmalltee fae paae cedlecleed oe lecelees|ectleseleciecrlhenles| Ludlasta, Synop. oil. Hoss. Eels pily,atera,, tera 
SL COTE teanebe Ln. BeBe speReetn hee] ech aeo| Bee! eel fore! seal Se! aes seal eel lec! loon bee Vide Orthonota. 
= DEL wetecemenenoees Real Ieool el Real (anal eal (teal feral Geel (ee Q. J. Geol. Soc. vol. xx, p. 298, t.16, f. 2 (allied to Mod. 
armoricii : Budleigh pebbles). 
— trapeziformis... Salt. ............ cal call aval coef Be |e |esaltona ee Yea|eoe|aeel(ece|'s-|se¢|\see|eee|) Woubbeuluspecies. 
LY G:s soe osssscaccaene Linn, 1747.00... 
— rotundata ..:... OWS Saaswecesay all eae fvatalleot laced sealed le alleaad wet Vide Grammysia. 
Mytriipm. 
Mytilus ............ Linn. 1758.1... AUSIUPLEHOISIODY 
— chemungensis... Conrad ......... Ree ee ee tee! sete sevlieallnedle sc ves| x fecefece|ece]eee{eee|ee.] Zeoceramus, Jour. Acad. Nat. Sci. Philad. vol. viii, pt. 1, 
t.13, f.9. Mytilus, Salt, Mem. Geol. Sury. vol. ii, pt. 1, 
p. 365, t. 20, f.10, IT. 
— cinctus ......... PUB coppeniniece Bg (eel oer (eee coe me [eo eee ocd vallecelaaaleeclesnleeelesnlnee|m@ceOle Rept. 1.25 A> 2. 5:16; p.ra2or 
— exasperatus...... Phill. ... Pe Beal oslo ea (Soe wat lecelhon|oae reli, x Mem. Geol. Surv. vol. ii, pt.1, p. 364, t. 20, f.12. 
— gradatus......... SGU Neccwesouse vee[saa|leoa[ecclees saleslvea fess ses[ecs[esa|ese{ece]ese]eee| =| 20@e Modiolopsis. 
— wmytilimeris...... Conrad ......... Gel 60d) [eed [cod eed jooe Pale ral ea ie * Inoceramus, Jour, Acad. Nat. Sci. Philad. vol. viii, pt. 1, 
t. 13, f. 10. Mytilus, Mem. Geol. Surv. vol. ii, pt. 1, 
p. 3604, t. 20, f. 7-9; ib. Siluria, p. 229, Foss. 6r, f. 6. 
106 
