PALAOZOIC. HYDROZOA. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
A AS ele ; a 
n 4 a} 8 ise . s|\: ss . | 
B| | fe Sle(S|elslzlS a5 |2 
a| |S SlSiAlelFigiaisis 
AlgliBls Sl SSIS oIZIRIE IIS |S 
SPECIES. \2lealS]lslol=|8| Ss l4iAlBlals| REFERENCES, 
Ne \slea 2) SFIS |S/8/Sle)e s|o 
.| 8) Sols Slo) Als iS \S/s ei sie 
Hla] a| 3 AISlE/s/SISIS/E/ 8] a1 3/2 
ol RS a Sa] o]& © | Bs] alc | 
MSI SI RIS AIP IE IE EIA ipa |e 
Diplograptus (continued). 
— euglyphus ...... DOw. siccccee Ae foe a0) feel aon 4 Diplog. dentatus, Brong. Lapw. Belfast Nat. Field Club, 
1876-7, t.6, f.13. Diplog. (Glyptograptus) euglyphus, 
Lapw. Ann. Mag. Nat. Hist. 5 ser. vol. v, p. 166, t. 4, 
f. 14. 
—— Hudsonicus...........sscsceseee reece 46¢ [Soe lode! fosel (col fea) ail Snel el Fac sealed lineal col eon eee ...| Doubtful. 
— modestus......... LAP. sev .e won| eee|-eo[aee|aoefer pealeealfaaliead| see seclece[see[ee[ece]ese]ee| Cat. West. Scott. Foss. p. 6, t. 2, £. 33; ib. Belfast Nat. 
Field Club, 1876-7, p. 132, t. 6, f. 8. 
— perexcavatus ... Lapw. ......... 365||¢00]lacal lye Ibo =a ese] (000 fee aoc eee and Isao Iaeo) ooo fo Vide Climacograptus. 
| — physophora ...... ENA CHterercane dace G6) [254] |r |oo0) Jace 666 joco|)=%9) (aor seo 805||5o¢] fon5) aos anal |S! [oars Ann. Mag. Nat. Hist. 4 ser. vol. i, t. 3, f. 7; ib. Lapw. 
5 ser.. vol. v, p. 165, t. 5, £. 26. 
| — rugosus ......... BIMIM,....csseeees bo|/socl onal leeel Jeee Neate [eee (ODe| [eee seslucsfeee|ecefees[eee[ees| 7éde Lapw. Amn. Mag. Nat. Hist. 5 ser. vol. v, p. 168. 
| — SEPIA vreeesrereee BrOng: ....0se-|*++| >| 00s | (Boel Iksel loopl bac Pealleee leas acelleealeeele=s| | Doubbeal, 
— socialis..........+ Bapw. s.cosens- ctl ac) |to8) [ead sad! aaa fe"'| Hes (S08) oon lacol eel face vea[ecefeee]eee] Ann. Mag. Nat. Hist. 5 ser. vol. v, p. 166, t. 4, £. 13. 
th truncatus......... Tips ae avdsees ealeteell eat cea ess veel x | ae [ece[ece]eoe[ecs]eee{se-]oee{oeefeee) Belfast Nat. Field Club (Grapto. Co. Down), p. 133, t. 6, 
} 1 UY 
LASIOGRAPTIDE. Q 
(GLossoGRAPTIDH, Lapw.) 
| Glossograptus ... Emmons, 1855 
== fynbriatus: ccc ODS vececoceallewal coallewal occllexe ES Pol Risa Pe 7 en am ? Diplograptus, Geol. Mag. vol. ix, p. 506, t. 12, f. 8. 
PN CKG12 ese sees es coal eealllevaecahie x | oe | ac feee|ece|eecfece]ee[oes[eee]eee]-.| Diplograptus, Geol. Mag. vol.ix,p. 507, t. 12, f. 9. Glosso- 
graptus, Lapw. Cat. West. Scott. Foss. p. 7, t.2, £. 57; 
ib, Proc. Belfast Nat. Field Club (Sil. Rocks, Co. Down), 
p- 134, t. 6, f. 24. 
DICHOGRAPTIDR, ; 
| Goniograptus...... Ms Coy oie Adal eoo| faba fane| lao reclllestelicetdd ass valhonlectllleeelllcctillessileeslleeciiterodrebale Wactewecs Vis 
— Thureani......... WC Sooanance 560|{305)[oo| [noc al lpeellaaa| jade sesfaee[cae[eoe|ecefeve]ece]ee.| 2Ude Lapw. Ann, Mag. Nat. Hist. 5 ser. vol. vi, p.20. Didy- 
mograptus, ib. 4 ser. vol. xviii, p. 126. 
| Graptolithus ...... HGS: LAT. D7 5 L|\a||see|(2=-i| cee oe Boel eee feria ee sec[ece[ace|ere|-ee[ecefeee].--| Pade Monograptus. 
(Note.—This Genus has been reconstructed and rearranged 
since catalogued on pp. 10-13 (loc. cit.). The names Grap- 
tolithus and Graptolites therefore now possess no generic 
value. All those species placed or arranged under the Genus 
Graptolithus on pp. 10, 11, 12, and 13 should be referred 
RETIOLITIDA. to Monograptus. The additional species are now all placed 
| Gymnograptus .......-..-.0ssessersess under this latter name.) 
— Linnarssoni...... ST ULLO Se ceacenisnens 54 |bacl|Beel leee| 50 Fl bso) [opel lone secfeesleee[eeslescface{eoe].-| 2vd@e Lapw. Ann. Mag. Nat. Hist. 5 ser. vol. vi, p. 22. 
LASIOGRAPTID&. 
| Hallograptus ...... Carruthers 
— bimucronatus ... Wich. ....cccc0 | 604 food sao sesfese[eee{eee[reefees|ees|--| Diplograptus or Lasiograptus (vide). 
— mucronatus...... FUG aateansivenass =| |cool IRecl led bas] e°5| Ipocl ed] boc viclses[oeefeeelseeleeseeeleee| Vide Diplograptus, p. 8 & 9, for references. (Lasiograptus.) 
NEMAGRAPTIDE. 
Helicograptus .., Nicholson, 1868 
een) (Bee * cet] eee Cenograptus, Cat. West. Scott. Foss. p. 5, t. 4, f. 68. 
x Cenograptus, Cat. West. Scott. Foss. p. 5, t. 3, £. 67. 
* 20th Rept. Geol. New York, 1870, p. 223, 226. Canograptus, 
Lapw. Cat. West. Scott. Foss. p. 5, t.1, f. 64. 
Idiograptus ...... Lapworth, 1880 
Diplograptus .., M‘Coy, 1850... 
— aculeatus,........ Tole MSeepranoot once BSH (see teet| Heel lec ..| Ann, Mag. Nat. Hist. 5 ser. vol. v, p. 170, t. 6, f. 23 a-f. 
394 
