HYDROZOA. 
CAMBRIAN AND SILURIAN, 
PALZOZOIC. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
———e - a. =) 
el. SlBleldlslelel4].|& 
| |6 SSS AIS IEIS eles 
Sf) ja]. JHISIS/CIZIAISITIsl&é 
SPECIES. Alls] (s/c lslel Shalala al REFERENCES. 
Hes |SlMiS SASS lSlalglslel= 
DISISISI4 ASAI IF IE IE alae |e |e . 
Retiolites (continued). 
— Geinitzianus ... Barr. ........6... ope] 6a8) eed load feel geo * x x Gladiolites, Grapto. de Bohéme, p. 69, t. 4, f.16, 33. ? R. 
foliaceus, Geinitz, Verst. t.10, f.12a; R. Geinitzianus, 
Nich. Q. J. Geol. Soc. vol. xxiv, p. 530, t.19, f.19, 20; 
? ib. Hall, Pal. New York, vol. iii, p. 518; ib. Siluria, 4 ed. 
p- 540, Foss. go, f. 2; Nich. Mono. Brit. Grap. pt. 1, p.121. 
— perlatus ......... ViCIs tediceseesccul eon| sal sealissspessllene Bs eel eee ee Q. J. Geol. Soc. vol. xxiv, p. 530, t.19, f. 21, 22. 
= VOHOSUS weseseceee 1 FR TES eres epeocoo| tod] eee fear food (oad Faillped local ee Pal. New York, vol. ii, p. 40, t.17 A, f. 2. 
DICHOGRAPTIDR. 
Tetragraptus...... Salter, 1862 ... 
— bryonoides ...... GU Dre sracee Fe (eel isola oe eos oA Graptolithus, Grapto. Quebee Group, p. 84, t. 4, f.1-11; 
ib. Salt. Q. J. Geol. Soe. vol. xix, p.138, woodeut, p. 137, 
f.8a. Didymograptus caduceus, Salt. ib. p. 137, woodcut, 
f.13a,b. Grapto. latus, M‘Coy (part.), Q. J. Geol. Soe. 
vol. iv, p. 223. T. bryonoides, Nich. Q. J. Geol. Soc. vol. 
XXxiv, p.13I. 
— crucialis ......4.. PSQUEE Ractadateanen|| (coal seal nealees| coal iesel ee lleeel nee|lee|leas|iests|eg.|'ces|lnes| [eas [eas Vide T. quadri-brachiatus. 
— crucifer ......... Jad ete necdbrrcaa| ad tank sed (co yee oelleeel foo Graptolithus, Grapto. Quebec Group, p. 92, t.5, f.10; ib. 
Nich, Q. J. Geol. Soc. vol. xxiv, p.144. 
PomstT stl ieee Wonks <.soateenkes al oeleee loos ee Hopk. and Lapw. Arenig and Lland. Rocks, St. David’s, Q. J. 
Geol. Soc. vol. xxxi, p. 651, t. 33, f. 11. 
r= 1 30-70 Mi anoooneeoon ae estonorade sell aeiclssal owed eeeliesslies Graptolithus, Grapto. Quebec Group, p. 94, t. 6, £.8; t. 5, 
f.11,12; ib. Nich. Q. J. Geol. Soc. vol. xxiv, p. 131. 
== Hicks .eccce ST Op Teseesesvectaes aeilonaloce|seefoealisss Hopk. and Lapw. Arenig and Lland. Rocks, St. David’s, Q. J. 
Geol. Soc. vol. xxxi, p. 651, t. 33, f.12. 
— quadri-brachiatus,..Hall ......00.)...]...Jeee[ees kell gel oer lace (602 loan] [sod [oae|Kaee| [See) [oa fae Graptolithus, Grapto. Quebec Group, p. 91, t.5, f. 1-5, t. 6, 
f.6, f.5,6. Tetragrap. crucialis, Salt. Q. J. Geol. Soc. 
vol. xix, p.138,, woodeut, p.137, f.8b. Tetra. quadri- 
brachiatus, Ether. Junr. Ann, Mag. Nat. Hist. 4 ser. vol. 
xiv, p. 3, t. 3, f. 5-8; ib. Hopk. and Lapw. Q. J. Geol. 
Soe. vol. xxxi, p. 649, t. 33, f. 9. 
—=ISOITR:) 5s aeeas0eas TEES) cposoeten ood oe local eae ae Atesa| real eee les .| Fucoides, Hist. Végét. Foss. vol. i, p. 71, t. 6, £.7,8. Clado- 
graptus, Geinitz, Die Graptolithen, p. 30, t. 5, f. 32-35. 
Tetragraptus bryonoides, Salt. Q. J. Geol. Soc. vol. xix, 
p-137, f.8; ib. Ether. Junr. Ann. Mag. Nat. Hist. 4 ser. 
vol. xiv, p. 2, t. 3, f.1-4. Tetragraptus serra, Hopk. and 
Lapw. Q. J. Geol. Soc. vol. xxxi, p. 650, t. 33, f. 10. 
THAMNOGRAPTID®. 
Thamnograptus,.. Hall, 1859 
> I sccocnceacee INCH ALES ae ooo Slee aleme eel eae Ann. Mag. Nat. Hist. 4 ser. vol. xvi, p. 271, t. 7, f. 1. 
GLADIOGRAPTIDR. 
Trigonograptus,.. Nicholson, 1869 
— ensiformis ...... D2 (c/a me eal ieee face loce| oe Fol aoe | ccd Joo0) foes fel fee! [aie [ee [Beicl sec! tec Grapto. Rept. Geol. Sury. Canada, 1850, p.133. Retiolites, 
Grapto. Quebee Group, p.114, t.14, f.1-5. Trigono. 
Hopk. and Lapw. Q. J. Geol. Soc. vol. xxxi, p. 659, t. 34, 
fi8s 
— lanceolatus ...... INCH ent ndes cesses |} 13} foal face} }ea4| [259) [coo] aloud) [God label aba) [cel Lacs Ann, Mag. Nat. His. 1869, 4 ser. p. 231, t.11. 
— truncatus atl eee eee aot (cocl aoal anal nes eel laced esa eal ios Q. J. Geol. Soc. vol. xxxi, p. 660, t. 34, f. 9. 
”. Incerrm seEpis. 
Dichotomous Polyzoon,.. Salt. ...|...|...)é..)s0J-- {eee |oer| ouc|jo0-|| nec ancl fend abe jae [ee] [ood Q. J. Geol. Soe. vol. xix, p. 138, woodcut, p. 137, f.14. 
