PAL.BOZOIC, aL NID) AR OYA OWNG CAMBRIAN AND. SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
= = 
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] 
SPECIES. REFERENCES. 
Low. Llandovery. 
Woolhope List. 
Wenlock Shale. 
| Wenlock Lmst. 
Aymestry Lmst. 
| Upper Ludlow. 
Arenig. 
| Llandeilo. 
| Caradoe or Bala. 
| Tilest. & Passage. | / 
| Up. Llandovery. 
| Pass up. 
| Har. St. David’s, | 
| Lower Ludlow. 
| Menevian. 
| Lingula Flags. 
| Tremadoc. 
Didymograptus (continued). 
—atinis ee, RRO CE pSccpneeacee 3601 [053] 005) ood [41 Beolkssal load] (apo seslase[eeefere|eee[eeefeee]eee]| Didymo. sp. Salt. Q. J. Geol. Soc. vol. xix, p. 137; fats) ds 
D. affinis, Nich. Ann. Mag. Nat. Hist. 4 ser. vol iv, p. 240, 
t.11, f. 20; ib. Hopk. and Lapw. Grapto. of Arenig and 
Lland. Group, Q. J. Geol. Soe. vol. xxxi, p. 645, t. 33, f. 6. 
Vide Dicellograptus. 
Didymo. Hopk. and Lapw. Grapto. Arenig and Llandeilo, St. 
Dayid’s, Q. J. Geol. Soc. vol. xxxi, p. 646, t. 33, f. 8. 
Graptolithus, Grapto. Quebec Group, p. 73, t.1, f.16-18; 
t. 3, f. 9-10. Nich. Q. J. Geol. Soe. vol. xxiv, p- 136; 
Ann. Mag. Nat. Hist. 4 ser. vol. v, p. 346, f. 7. 
Vide Tetragraptus bryonoides. 
Vide Tetragraptus quadri-brachiatus, 
divaricatus ...... LLG see deere ec aca ees) Godlee} oe Boal leag|loed| bios secfoce|eee{ees|oeeleeefeee]i..| Vide Dicellograptus Moffatensis. 
Vide Dicellograptus Morrisii or D. flaccidus, Hall. 
Hopk. and Lapw. Grapto. Arenig and Llandeilo Rocks, St. 
David’s, Q. J. Geol. Soc. vol. xxxi, p. 645, t. 35, f.1. 
Graptolithus, Report of Geol. Surv. of Canada, 1857, p.131; 
id. Hall, Grapto. Quebec Group, p. 80, t. 2, f. 11-16, 1865. 
Didymograptus, Nich. Ann. Mag. Nat. Hist. 4 ser. vol. v, 
p- 341, t. 7, f. 2; id. Hopk. and Lapw. Grapto. of Arenig 
and Llandeilo Group, Q. J. Geol. Soc. vol. xxxi, p. 642, 
e335 phere 
Graptolithus, Grapto. Quebec Group, Supp. p. 143, t. 2 
f.17-19. Didy. Nich. Geol. Mag. vol. iv, p.11o, t. 7, f. 
I-3; ib. Ann. Mag, Nat. Hist. 4 ser. vol. v, p. 353, t. 7, f. 6. 
Leptograp. Lapw. Geol. Mag. vol. x, p. 556. (Nemagraptus.) 
Ann. Mag. Nat. Hist. 4 ser. vol. iv, p. 241, t.11, f£. 21, 22. 
Grapto. of Arenig and Llandeilo Rocks, St. David’s, Q. J. 
Geol Soc. vol. xxxi, p. 649, t- 35, f.3. Grapto. geminus, 
Scharenberg (non His.), Ueber Graptolithen, t.1, f.1, 3, 4. 
Leth. Suec. t. 38, f. 3; ib. Salt. Mem. Geol. Surv. vol. iii, 
p- 331, t-11 B, f.8; ib. Q. J. Geol. Soc. vol. xix, p. 138, 
woodcut p.137, f.13 a. 
Ann. Mag. Nat. Hist. 4 ser. vol. xvi, p. 271, t. 7, £. 3. 
Vide Cyrtograptus. 
Pa eo) sel ee) (ee sealecelesceee]ecs{eoe{eee]ees] Q-J- Geol. Soo. vol. xix, p.137, f.13 £; ib. Salt. Mem. Geol. 
Surv. vol. iii, p. 331, t-11 B, f.6-8. D. constrictus, Hall, 
Grapto. Quebec Group, p. 76. D. Geminus, His. Siluria, 
4 ed. Foss. 9, f. 8, p. 48. ? D. patulus, Hall. 
=| | rl fee llaaaltbadl Rad cislecelescfecc{ece{cacleae]e..| Graptolithus, Grapto. Quebec Group, p. 74, t. 1, f. 20. 
Didymo. indentus, Hopk. and Lapw. Grapto. Arenig and 
Llandeilo Rocks, Q. J. Geol. Soc. vol. xxi, p. 647, ‘te Bae 
f. 7a,c. Var. D. nanus, Lapw. id. t. 33, f.7d, and t. 35, 
f.4. Didymo. geminus, Nich. (non His.), Q. J. Geol. Soc. 
vol. xxiv, p.124, t. 5, f. 8,9; ib. Ann. Mag. Nat. Hist. 
4 ser. vol. v, p. 346, f. 6. 
Poe | ok JaePl. od]... siclece|ccefeee|ece[eee]oee|-..] G@raptolithus, Brit. Pal. Foss. p. 4, t.1 B, f. 7 ; ib. Geinitz, 
Verst. Grauw. die Grapto. p. 39, t. 2, f. 37, 38. 
Vide Dicellograptus. 
Sil. Syst. p. 694-711, t. 26, f. 4. Prionotus geminus, His. 
Leth. Suec. Supp. 2, p.5, t. 38, f. 3. Cladograp. Geinitz, 
Die Grapto. 1852, p. 30, t. 2, f.40. Didymo. Baily, Q. J. 
Roy. Geol. Soc. Dublin, 1861, t. 4, f.1; ib. Salt. Siluria, 
4ed. p. 51, Foss. 11, f.13; Foss. 12, p- 61, LQ sivas ke ss 
ib. Hopk. Jour. Queckett Micro. Club, vol.i, t. 8, £. 65 Th. 
Nichol. Ann. Mag. Nat. His. 4 ser. vol. Vv; p. 349, t. 7, f. 
7a,b; ib. Hopk. and Lapw. Q. J. Geol. Soe. vol. xxxi, 
p- 648, t. 35, f. 2 a-f. 
— elegans ......... OT IRE race eACLOe seslieellece|Sedfoee a0] Boel eae) ane BoG|focG| seal eae! aoa Ieod) focal inae 
— euodus..., 
— extensus ......... WELL ae sce setts: sence eael|lora 
— flaccidus ......... Ja areposenonn aaa Fallon dee! bes Plea eral (ea Dee resis 
— fasciculatus...... ING CMS sesaee canvas Bsa loae] Sed) seu 
| — furcillatus ...... TA reser ececone Sop [acu|[604| [aac fobs Pl Bealload |ase oAllae4| anal doa ee 
— geminus ......... gg here Papers sez vea|inea| une 
| 
| 
| — gibberulus ...... NGC areneere eee B8a| sel eal lone 
— hamatus ......... BONG satcssesces Fi coa| =a) see [ se soc enaliedd bes 365305] 64] {0e4] cna) |o5a| [coal ons 
— hirundo ......... SOW seocct ences. elas lsc eee 
| — Moffatensis 
— Maurchisoni 
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