PAL®OZOIC. HYDRO ZOA: CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
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SPECIES. slslels| iSlolelslasisialeialgl- REFERENCES. 
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Pleurograptus (continued). 
— vagans............ NAC Secs ccuvsiees £4 [ood] [oe food | 3 [Be sal [Sod [ane secface[oeslece]ave[ecsleoeteee] Q. J. Geol. Soc. vol. xxiv, p.144, t. 6, f. 4, 5. 
PHYLLOGRAPTIDE. 
Phyllograptus ... Hall, 1865...... 
Thamnograptus ? Hall .......... 
— angustifolius ... Hall ............ Soc acolo, ad (¢7H) aes] oad) [sed fee seefec|ee}erlenteeteelee| Grapto. Quebec Group, p.125, t.16, f.17-21; ib. Salt. Q. J. 
Geol. Soc. vol. xix, p.135, woodcut, p.137, f.7.a,b; ib. 
Nich. Q. J. Geol. Soc. vol. xxiv, p.132; Siluria, 4 ed. 
p- 541, Foss. go, f. 7. 
— stella... SEL OD Iosanenecencess we see eal are | cet | cal ealiosel nee sus]ees|ene|ese[ers[eee/eoel eee] QQ. J. Geol. Soc. vol. xxxi, p. 658, t. 34, f. 6. 
Gy US ic. nwares ces GU oo iivsseace Sroliess| oes esl tea |ecaliseal eri ae: seelecsleee{ees[ees|ere]eeeleee! Grapto. Quebec Group, p.119, t.15, f.1-12; ib. Nich.Q. J. 
Geol. Soe. vol. xxiv, p.133, t. 5, £.16. 
? GORGONIDE. 
Protovirgularia... 1/‘Coy, 1850... 
— dichotoma ...... ME COY aicevases pealiseelawelcceices Spilise, [eal eos soevalscaleee|ese|scelees|.--] tlt. ral. Hoss. p. 10; t.% B; £175 %2.3, HarkQ J. Geol, 
Soc. vol. xi, p. 475; ib. Baily, Char, Foss. p, 6, f. 4. 
— Harknessi ...... LGD Wasn.ccncnoes 569 |a0n| anc koe] faa me lecelens diene serleselece[oeefeeeleeeleee]ee-| Geol. Mag. vol. vii, p. 279, 281, 
PTILOGRAPTID#. 
Ptilograptus ...... Hall, 1865...... 
— acutus ............ tH Op iereewece rs 566) [e6e|fesel lane [55 sellleeslieeed eee serlecs[ece{seefeeefece]eee{e.-| Hopk. and Lapw. Arenig Rocks, St, David’s, Q. J. Geol. Soc. 
vol. xxxi, p. 662, t. 37, f.1. 
— anglicus ......... VAI erases Sou csee S60) [a8 1669) ood fac 505) one) oo Ihae see] [ose] x feee]oee{eee]...] Ann. Mag. Nat. Hist. 4 ser. vol. i, p. 238, woodcut, p. 240, 
f.1-5. 
— cristula ......... TOPIC s cc cessesevs 64 [eee [seal ead 13! IS fadal lod lane sesfecsfecs|seeleee{eee{eee]eee| Hopk. and Lapw. Grapto. Arenig and Lland, Rocks, St. 
David’s, Q. J. Geol. Soc. vol. xxxi, p, 661, t. 36, f. 2. 
soled load 660) bd) and loco sealevsleee| a [ooe|eee[eee|oe-] Geol. Mag. 1873, vol. x, p. 520. 
4 | ll God! ood) lone fics seslese[eoe{eeslese[eee{oee[.e-| Hopk. and Lapw. Grapto. Arenig and Lland. Rocks, St. 
David’s, Q. J. Geol. Soc, vol. xxxi, p. 661, t. 36, f. 1. 
sei[saq |ooo Hl lSeelladd 1a ses[easlece[ece[aeefece|eee]eee] Q. J. Geol. Soc. vol. xi, p. 475. ? Cladograp. gracilis, Carr. 
Bee eee x Bed (ace Geol. Mag. vol. v, p.126, t. 5, f.16. R. gemmatus, Barr. 
Richter Zeitschr. Deutsch. Geol. Gesellesch, 1853, t, 12, 
f. 349. 
— Linnai ......... BOTs rvlaasenees 66¢| loool aad |ned |oo0 x | & [eeefoee ses|seefece{ece[evefece|-ee]ee.] Grapto. de Bohéme, p. 65, t. 4, £. 2-4; ib. Carr. Geol. Mag. 
vol. v, p.126, t.5, f£.15; ib. Nich. Q. J. Geol. Soc, vol. 
XXIV, Pp. 531, t.19, f. 25, 26. 
— maximus......... CORP Eee ace hin Beal eed nee iced eee nea load (ook ses[evs[ece{ece]eee[eee|eesfeee] Geol. Mag. vol.v, p.126, t. 5, £,14; ib. Siluria, 4 ed. p. 541, 
Foss. go, f. 6. ; 
— peregrinus ...... BOPP ean carccese se \oael nec} |ood (600 Sealiskl eae | aes sss[ece|ees[eee]eesfeeefeeefeee] Grapto. de Bohéme, p. 67, t. 3, f. 10-13; t. 4, f.553 ib. 
Hark, Q. J. Geol. Soc. vol. vii, p. 59, t.1, f.1; ib. Nich. 
vol, xxiv, t.19, f. 23,24; ib. Siluria, 4ed. p. 61, Foss. 12, 
f.1; ib. Baily, Char. Brit. Foss. vol. i, p. 26, t. 9, f. 7. 
— triangulatus ... Hark............. Pealless| eae] cet) ace Bod one ed FES ses[ece|see[eceless[eee{-ee[ee| Vade Graptolithus Sedgwickii. 
GRAPTOLITID®. 
Retiolites ......... Barrande, 1850 
Gladiolites ...... Barr. 1850 
? Retiograptus. Hall ............ 
