PALAOZOIC. HYDROZOA. CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN, 
es) a Sl/SISI/S iS) 2le/sle/s 
SPECIES. slelalel iflclalslars slaleiaiale REFERENCES. 
Bele s/s Sie lslslslgisisl= 
AB ee Bee sicGaGGEEEkk 
3) 9)/.8)2 | a I 
HISISISIS(A/SS FIFE IIB |e 
Dicellograptus (continued). 
— Morrisii ,........ Hophisccivessses 6: o6|}oc3) [ace leer] foe ll eee | lea | owes sesfecc[eaefecsleee|eoe{eeeleee] Geol. Mag. vol. viii, p.24, t.1, f.2. Didym. flaccidus, Nich. 
Geol. Mag. vol. iv, p. 110, t. 8, f.1-3. Didymo. elegans, 
DICHOGRAPTIDE. Carr. (part.), Geol. Mag. vol. v, p. 129, t-5, £.8. Dicellog. 
cho srapt use Salter, 1862 ... Hopk. C5 Ep vol. Vili, p. 24, t.1, £. 2. 
— annulatus 4} Nee lloocl fae] kaos see[een[ess[oee[eee|-eolese|-o-| Ann. Mag, Nat. Hist. 4 ser. vol. iv, p. 233, t.11, f. 4, 5. 
— fragilis 4 (ES) |oeelleecl lace! ace see[eseless[eee|oe-]eee/eee]-.-] Ann. Mag. Nat. Hist. 4 ser. vol. iv, p. 232, t.11, f. 1-3. 
— Logani ,........ iL efal{o04) [ood lap [aon Soa \tanel [adel |ase seslerelecsfers[oeefeetlee[eee] Vede Loganograptus. 
— multiplex Al | {E80 |o0e| food eco vselecs[eseleet|eceeeefeceleee| Qs J. Geol. Soc. vol. xxiv, p.129, t. 6, £. 1-3. 
— octobrachiatus.. Hall ............ eel cee eal eee] (Rel lana ae loc veeleeelaeefeee|ocsfees{eee|ee| @uaptolithus, Geol. Surv. Canada, Grap. Quebec Group, p. 96, 
t. 7, 8; ib. Nichol. Q. J. Geol. Soc. vol. xxiv, p. 129, t. 5, 
f.1, 2. D. Sedgwickii, Salt. ib. vol. xix, p.138. D. ara- 
nea, Salt. ib. p.137, f. 9. 
— reticulatus ....,. EN DCU eer aeriennase 6001|S04 aaa] [Ano | fee! ocd jase) face Feclecslooe|erelseele«sloneloae] Qs J. Geol. Soc: vol. xxiv, p.143, t. 5, £. 3,5. 
— Sedgwickii...... INIGIES. senancoeodneo feel [Aba lao8) loge! fe lacelfooel led cla ves[ecefaasoee|eee[eee[eee{ee] Meade D. octobrachiatus. 
— Sp. (small branches) Salt. , 6] au Ie] oon) coe) (eee wen|cee|sealeoe|san| eens) sae] stile Geol. SOC. VO. XIX, PrLZS, Pp. 1375 f. 02s 
DICRANOGRAPTID®. 
Dicranograptus.,. Hall, 1865...... 
= Clingani ......... COP ee decnecaes sealhaeleca|ean| esa elilscel ae bos seefece|eee[ece[eee[eee]oeo].-] Geol. Mag. vol. v, p. 132, t.5, £.6; ib. Hopk. vol. vii, p. 358, 
Ga1165)8.) 42 
— formosus......... HOD Kcwescsqascess 0 Hoel dea leer] foo | laoa ood os w= | 0. |so-/eee[eee/ees{ere|eoo] Geol. Mag. vol. vii, p. 356, t.16, £. 2. 
— Nicholsoni ...... THOpee we easeeseee 56 (Had See beto| one eilecel see sere sea[eoe [see] son|eoe|ees|ere[eee| Geol. Mag. vol. vil, p. 357, t.16, £. 3. 
— ramosus ......... TUE epee ee scien Af (lf eret | leo faa seafecfecsfees{ecsleee{ess[ee.| Diplograp. Grap. Quebec Group, p.157. Grapto. Pal. New 
York, vol. i, p. 260, t. 73, f. 3. Salter, Q. J. Geol. Soc. 
vol. v, p.16, t.1, f. 7. D. ramosus, Mem. Geol. Sury. vol. 
iii, p. 330, t.11 A, f.1. Cladog. Geinitz. Dicranograp. 
Hall; Hopk. Geol. Mag. vol. vii, t.16, f. 4. 
RP CCLUS iy traaiiaeteels TOD Meee eaes Soa ise eatel eran Fl laeol [adel (oe vealliicel| sell elseif staf loll site| «rel AGrEOL. Maovole 1x, spa5OS,) tall25: tO. 
— SCELEANS vo csesese SGU, sen ceescsess 60) [654 |on0 Inad| |ben is6|[ene|lonel nas sesfeceleesfecsfees[ees[eee|ee.| Vide Didymograptus. 
CALLOGRAPTIDE. 
Dictyograptus...Hall (Hopk.1875)|...|...|...|...J.-- Baal ees ea (oe seefeceece[eeelses[eesleee/...] fide Hopkinson and Lapw. 1875. 
Dictyonema ... Hall, 1852...... 
— cancellatus ...... HOD rec de scene 355| ono [oe 35 (£3 |[ano|looel fon) face secfecs[ecsfece[ecefere[eee[ees| Hopk. and Lapw. Q. J. Geol. Soc. vol. xxxi, p. 668, t. 36, 
fe wine 
— Homfrayi ...... HOD Neues casess Bon) [6551 |e Ibod! HSS fae) [ae] [ano sesfec[ees[eee[ese{--]--]-..| Hopk. and Lapw. Q. J. Geol. Soc. vol. xxxi, p. 668, t. 36, 
fez 
— irregularis ...... QU ent tec aes: Serd| (ete eee era aed ateet aro | lel ere sec[ecs[ecslecs[ecs[ees[eee|eee| Dictyonema, Grapto. Quebec Group, p. 136, t. 20, f. 1, 2; 
] ib. Hopk. and Lapw. Q. J. Geol. Soe. vol. xxxi, p. 668, 
t. 36, £.12. 
——W MOD) a ceedoccteee Hop.and Lapw.|...|...]...|...] & |..-|---|-.-fe- ser) enn|sor|aes]ea0|eeeles0|<-] Qi J. Geol. Soc: vol. xxxi, p. 669, t. 37, £. 4. 
Dictyonema ...... Hail, 1852...... 
Graptopora .,, Hall, 1852...... 
— PAMicaMs ......4.. IETS) Pecorcp peste: sia | ae ete | ee [ete Bact leaelisc oe serfase[ecsfece[eee[eeefeee[eee| Vide Callograptus. 
— sociale ,.,......... GLb) erat ostic: Pry se eal eel ef SSelhceed te 38 sesfors[oesfees[eee[eesfaee]--] Siluria, 4 ed. p. 46, Foss. 8, f. 3, Gzaptopora, Hall, Pal. 
New York, vol. ii, p.174; Salter, Mem. Geol. Surv. vol. iii, 
p. 331, t. 4, f.1 a-c; Baily, Char. Foss. t. 3, f. 2 a-d; 
DICHOGRAPTID®. ib. Expl. sheets 167, &e. Geol. Surv. Irel. p. 28. (? Dictyo- 
Didymograptus... ‘Coy, 1851 ... eraptns:) 
Dichranograptus Hall, 1865 ... 
Cladograptus ... Geinitz, 1842... 
Tetragraptus ... Salter, ( part.) . 
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