PALAOZOIC. IPUM TH ROE OND, CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
= = 
elle 4\Flelglslelsld] el & 
=| |2 S/E/S/8la/Z/Si ales 
El IE|.| | ISB 
SPECIES. Agel] (S/S Seles Blas REFERENCES. 
H/lEls|Sl lS Sialslsts!s|xlelals|s 
RIS Ebel solsol IAlals Vi2liale 
HISISISI4IAS/AS FIFE IAlaipia ia 
HYALEID®. 
Pterotheca......... Salter, 1852 ... 
leodord.......++ Pér.et Les. 18 
Cleodora, ér.et Les, 1810 TEC GoMnate 
Cleoderma ...... Hal T8OL. cre 
— wriostris......... Salta ne eacatess sc6llooe|[asellnot| loot serfecs| eos ck fooe|ees|se]eee| aoe) ee] eee] e«] Doubtful species, 
— corrugata ...... Salts. es nssoces: pecllbact|conllace| (sso saa se |Ilooed ser verfrrefersfeelece[oeefeslee-| Brit. Assoc. Rept. 1852 (sect.), p. 61; ib. Mem. Geol. Surv. 
vol. iii, p. 353, woodcut 18. 
— transversa ...... JH Rb seamncgencac S58| ae leon|faca| loo onl E24 [sno foo ses[eve[eae[eos[eos[eee|see[eee] Siluria, 4 ed. p.199, Foss. 41, f. 4. 
— undulata ......... ISCHIA. sotmconnbeet 66¢||S0d| 6001 [ead foo pot et God [a0 sea[evelevelooslecelooe]eee{--e| Mem. Geol. Surv. vol. iii, Geol. N. Wales, p. 274. 
Salterella ......... Billings; T86E a\\.e.| .-|s0-| vec oo wine [lesrallaere | tee sseleas[ecelessfove|oee{eee[ee-] ede Annelida, p. 36. 
HYALEID®. 
Stenotheca......... Salter, 1866 ... THECOSOMATA. 
Cyrtotheca ...... Saléer...........- 
— cornucopia ...... ISHTA, “reneboocica Sellers lea llcad bee valle sera ne sea[eoe|eeeleoe|ees[eerflene[oee| Hicks, Q. J. Geol. Soc. vol. xxviii, p. 180, t. 7, £12, 13. 
HYALEID&. 
ABET gocoopgsdeadocd Sowerby, 1844 . 
Hyolites? ...... Bichwald, 1840 THECOSOMATA. 
Pugiunculus ... Barrande, 1847 
—valata csiceseceee eerl|litel| want ena loae fecal or Centrotheca, Mem, Geol. Surv. vol. iii, p. 253, t.10, f. 25. 
— aANCepS..........05 4) (05d jade BCCI EH foe (ae ver] ak |eenfeee{eae|ooe)ees]ss.| Mem, Geol. Surv. vol. ii. pt.1, p. 355, t.14, £.1. 
— antiqua ......... FP ondl Iebol lode! locel noel opel Ice) loon Q. J. Geol. Soc. vol. xxvii, p. 400, t. 16, f. 13. 
——"BTAGA ...cecesaree 54 [3] l6dcl| cca oor fosd leas sea[ece[ece]ees[eee|eee{eee)ee-] Mem. Geol. Surv. vol ili, p. 352, t.10, f. 15-21 (P 17,18). 
— bijugosa ......... bal |e (cod aeal [cad fead loon sea[aee[eeelere]eee]ece]eee{aee| Mem. Geol. Surv. vol. iii, p. 351, t.10, f£. 19, 20. 
— Caereesiensis ,.. Hichs............ delice dpaoelieten sealed bes Fal sccthoeleee|se-i|eceleealeac! (Quidls Geol. Soc. vol. xa, (1p. 1895. Ul, te 76 
=> (Lo) 11 ELKO) Qoeinag) 2X00 hanccanadases| [odo (sselieod teott lscelfE%:llo0¢| food| [sad looclfoon Q. J. Royal Geol. Soc. Dublin, 1861, vol. ix, p. 300, 1, t. 4, £.8; 
ib, Expl. sheet, No. 133; Mem. Geol. Surv. Irel. p. 12, f. 4. 
? Gonophores of graptolites. 
— corrugata,.,...... ISGUGS rate eccccties Coe) | hel ibed lose =Ap| fat! ond foos see[eee] cen] see] evs|ess|ses]-«-] Qs J--Geol. Soc. 1864, vol. xx, p. 238, t.13, £10; ib: Brit. 
Assoc. Rept. 1865, p. 285. 
— cuspidata ...... Stele. <Gapeaneagher acollooa| aoc] es] |s08)|ao8| jan0l foe! [oan seslace[ees{eae{ecs]ece]eee]eee| Mem, Geol. Surv. vol. iii, p. 353, t.10, f. 25. (Sub-genus, 
Centrotheca.) 
— Davidii Alec ads (ese [anal ‘aod od soallees|loes|[erllectllses|eoaleeall Geral Geol soc. Vol. xxIx, |p. 50; bard> 4. 255120: 
— Forbesii Alleoe] lead FOo|[oaol fod ase seal Pdliecell| dell lesa | cel eee LQ ead enGreole SOCHaVOl. a1, spe aitasp telson, ale 
— Harknessi at lpeel (enn Pel Rea eee rel (noel eels (eee ealiomal tscl os Q. J. Geol. Soc. vol. xxxi, p. 189, t. 10, f. 11. 
— Menevensis...,., ISTE anbacantiogd 4 Reeel°3 | oor] [aoo| eae onal aod Ione seclece[ecs{ece{ace{erefeee{ee] Cat. Camb. and Sil. Foss. Mus. Pract. Geol. p. 11. 
— obtusa ............ Salts, aessesoscese ddd jaea|| €'|lood Jose sanllonalfoéel {rc ssa[ase[eee]eca]ece]eee{see/..e| Mem. Geol. Surv. vol. iii, p. 352, woodcut 17. 
— operculata ..,... SGIE0 Wencevnedete Ki[ seal iscz|-on|lesa| bes Mem. Geol. Surv. vol. iii, p. 351, t.10, f. 22-24. (Cleido- 
theca.) 
— penultima ...,.. SALG aac severe Pal P eal | s|lone lobe oaalest eae ce sec[ccs[evefecs]ore{ees{asefese| Brit. Assoc. Rept. 1865, p. 285; ib. Hicks, Q. J. Geol. Soc. 
vol. xxviii, p. 180, t. 7, £.15, 16. 
— YeVers® ......04. WGNE vaevecusseee|(tealinwel tect aed [nel ace rel ee Nee leee Siluria, 2 ed. Foss. ro, f. 21; ib. 4 ed. p. 51, Foss. 11, 
f. 21, and p. 199, Foss. 41, f.1. Z. triangularis, Hall, 
Pal. New York, vol. i, p. 313, t.87, f.1. TT. reversa, 
Salt. Mem. Geol. Surv. vol. iii, p. 353, woodcut 14, f. 6, 
Pp. 347. 
118 
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