HYDROZOA. CAMBRIAN AND SILURIAN. 
PALEOZOIC, 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
=| | & SlSiSle sl ele lalSlz 
Sy siolA ia sl\Alidgl= 
i Ala lBisl lol/sl/Els/el@/F/B/_)3 |e 
SPECIES. 3/2 ]e/3] |e = 8/Si4l4\A Fla Bailes REFERENCES. 
SQ elsls[felsl CRS sis lslsisiel= 
HIS(SISIS|SIEIEIC/SISI/S/EI8/ 2/312 | 
SSIS] S| a] of &).o ad RO So eel = 
HIS ISISI4(AISISIb IF IFIED Ie | 
DICRANOGRAPTID&X. 
Dicellograptus... Hopkinson, 1870 
— caduceus ......... Dapw.  v.rcevees tesfecsleeelecsPone res] ok [eoafees sesfere[essfeeefeee{eee|eee}eee| Cat. West. Scott. Foss. p.5, t. 4, £.&3; ib. Grapto. Co. Down, 
Belfast Nat. Hist. Field Club, p. 141, t. 7, f. 3, 1876. 
— complanatus .,, Lapw. ......... 8001 601 [600 [ooo and see] ak feosfees serfece[ece{eee{ece{eeefeee]...] Ann. Mag. Nat. Hist. 5 ser. vol. v, p. 160, t. 5, f£. 17. 
— divaricatus ...... SGIL Stanessacess 560 lao8] 50) ood [2 | 125: heed loscl Bes ses[ers[ase|eee]oee[eeefers[eee| Grapto. Quebee Group, p. 13; ib. Lapw. Belfast Nat. Field 
Club, 1876, p. 141, t. 7, f. Io. 
— furcatus .....,... Hall .......00. seallesellncc| es s[ eas a eed ee eo vec[eeeliee|eee{oc[eeefeel...| P Dieranograptus, Graptolithus, Geol. Surv. Canada, Grapto. 
Quebec Group, p. 15, 40, 41, 46, 57. 
S InbOrbUS veecccces LAPW. vaeseeeee|en-| oo [ore] ooafece [ok fof Ann. Mag. Nat. Hist. 5 ser. vol. v, p. 161, t. 5, f. 19. 
— patulosus al | ewe eel| se Ann. Mag. Nat. Hist. 5 ser. vol. v, p. 162, t. 5, f. 18. 
— pumilus ,.,...... JEGFIRESeeeconeca $55) |a05| (soul ood ban FoS| 2 |loool oa Be | ee | ete etl eset esse | ete Vide Q. J. Geol. Soc. vol. xxxiv, p. 331. 
— sextans............ WAU nae ceoncncee Br en feces cel (See # | ok [ooefoee neal eee Pal. New York, vol. i, p. 273, t. 74. 
DICRANOGRAPTIDE (Lapworth), 
Dicranograptus ,.. Hall, 1865 
— Moffatensis.,.... Lapw. vieccccre|eeelece|ece|ecefoor]oes [eve oeefeee 6 lod} locd) [00 food loan Vide Dicellograptus. j 
— spinifer ......... 2h) saneccocea| laa bed] feed lade jaoet aS fod Neen) koe 6cH| 009) dod! lanot ood Host tosol her Doubtful. 
== TER TU ETS) eoaneBecossasoocadechosd| | Bel reel boat eed) bye | 1 Iles [an allgoat isbel lanol col fone Pa asst eee Vide Q. J. Geol. Soc. vol. xxxviii, p. 568, 586, 591. 
— ZACZAC v.eeeseeeee . eal sleos| eect osk mae| Pell eed acs Bord (eect nee feel ince sefaee]...| Cat. West. Scott. Foss. t. 3, f..77; ib. Grapto. Co. Down, | 
Belfast Nat. Field Club, p. 141, t. 6, f. 42%. | 
Dictyonema ...... Hail, 1852 | 
Dictyograptus Hopk..iseseces 
— corrugatellum... Lapw. ....sccsefeeefeee|] ee feeeQoee coalloea| liso] {<3 | ooo! aul kaso! fone aol loot sos Q. J. Geol. Soc. vol. xxxvii, p. 172, t. 7, f. 3. 
— delicatulum...,.. LOpw:is Worvaces Bagl lane laa) ieeel (one con looalleoo (ellasall 2 Q. J. Geol. Soc. vol. xxxvii, p. 172, t. 7, f. 2. 
— Moffatensis ...,.. Lapw. ......... vaaless [oat] cee ses oa focal s Cat. West. Scott. Foss. p. 7, t. 4, f. 97; ib. Belfast Nat. 
Field Club, 1876-7, p. 143, t. 7, £. 17. 
— sociale............ ISN becenncdcood| [soo [oot *|* al opal loc (Addenda.) ? Dictyonema flabelliformis, Kichw. Leth. 
Rossica, vol. i, p. 369; ib. F. Romer, Die Foss. Fauna der 
Silurieschen Diluvia Geschube Sadenitz bie Oels in Nieder- | 
r schlesiln, 4to. p. 32. 
— venustum ...... TOU. Veusccsees sod| oad loon! Inoe| lobo 84 |b60l face) 1€°%4 Jbe6)|8é6| ooo! coal land) {005 lo5al xy -| Q. J. Geol. Soc. vol. xxxvii, p. 171, t. 7, f. 1. 
DICHOGRAPTID. | 
Didymograptus... M‘Coy, 1851... 
— constrictus ...... TELA i epee St lndl dob) 0d (| jad5] focal pal Heel lone! aeel jose! loool Ise lend! aoc Bad Graptolithus, Quebec Group, Geol. Surv. Canada, t. 1, | 
f. 23-27, p. 70. 
— similis............ 13 CU eepscerore SEllees| reales: ...| Grapto. Quebec Group, Geol. Surv. Canada, p. 78, t. 2, f. 1-5. 
— superstes ......... Lapw.  srccsevee ar eee eel ced) (Gee |S och [cpl ooo lace a4 land [epot coal loa wa.| Cat. West. Scott. Foss. p.6, t. 3, f. 74. ? Grapto. sagittarius, 
Hall, Pal. New York, vol. i, t. 74. D. superstes, Grapto. | 
Co. Down, Belfast Nat. Field Club, p. 142, t. 7, f. 15%. 
DIPLOGRAPTIDE. 
Dimorphograptus Lapworth, 1876 | 
— acuminatus...... Nich. ...... mallee ieee lies «| aa os Beal en| ee oes | evalese eel esel eee ...| Vide Diplograptus. 
— elongatus......... Dapro. «2.000. a eed os rl ate sacl eee le3) basi ase loeel local ene lee ...{ Diplograptus, Geol. Mag. Dec. II, vol. iii, p. 574, t. 20, f. 12, | 
1876; ib. Belf. Nat. Field Club (Co. Down), p. 132, t. 6, f. 6. 
— Swanstoni ...... JECTS peropece er err | se | Sea lee ees pel Pee | ec lPseallbeet| aecll ve couse les Diplograptus, Geol. Mag. Dec. II, vol. iii, t. 20, f. 13; ib. | 
Belfast Nat. Field Club (Co. Down), p. 131, t. 6, f. 5. 
DIPLOGRAPTIDE. ‘ 
Diplograptus ...... M‘Coy, 1850... 
— aculeatus ...... IEEFKB  seeecouns acl as) odd bee ce ar lose Alice late eee lee eee lee noel Foal hee Vide \diograptus. 
— bimucronatus ... Nich. ............ Ber eee esol roc) Aad *|¥]---[-.. Gf! eal loa) acd soa) leod! lad ac Ann. Mag. Nat. Hist. 4 ser vol. iv, p. 236, t. 11, f. 12. 
(Lasiograptus.) 
393 
