iV 
TABLE OF CONTENTS. 
of a Graptolite in the Potsdam sandstone. The graptolitic beds of Canada, 52 
Graptolites of the Utica slate and the Hudson-River formation, 53—54.—Table 
showing the vertical distribution of the genera of the family of Graptolitide, 55.— 
Table showing the geological distribution of the species of Graptolitide in Canada 
and the United States, 56-58. 
§ VIII. Historical notice of the genus Graptolithus, 59 - 64. 
CHAPTER II. 
§ I. Synopsis of the species of Graptolitide from the Quebec group, described in this 
Memoir, 65 - 68. 
§ Il. Descriptions of the species of Graptolitide illustrated in this Memoir, under the 
following genera: 
GRAPTOLMEHUS .«e\e!ajs\k.c/s cles sis/aie sieve ue here mis Geka aust toveiterenrie ale tevelsy«' ais (leis(e(e[staie aes 
TET OGRA DUS tors jciscoxey els 010) cjereiercle clove a ayeeroRete RAG Hes. Anwae sae » o.eieieere tee 
CLIMACOGRAPTUS ....... ehicreleteierodete ae Apusiere ale deeystee © aie ete aie Se Lit 
IEA NO TAT rn) as, 0) 016) o's, nile, s\e}/oia' ei eedetors Bisteteravarslekere ais 4 c aa acie sie 's omni ltcs 
EURO EURIAIP TTS cle fo\fello] oat ctellsiia ays) ets wb ohayayeter onsleneteltors Salad aes ei sitoyseatnnes Soke Srarerctage 115 
PAVTHOGRAPTUS) «\0jcis «ie /s\e\e/s) « aVn vais ralohotainiolalelcfeieiavcisieiavets, cetstelone MeeesHaoas Ll 
DENDR.O GRABINUA ttc mysimicraieielerclesielcrielele Arete lens ole leneta aie tiaras catatralstorens SionekS - 126 
CATTOGRAP TUS). cic.0 sciceicie ste wets e ateastehacels ois tofe siete tele vciavers ots SU Sisieiewiate eels 
DT OMMONE MWA <psie!s:c10oredeteseiei ina stess.sieie sieeve : my lisriva:tureteretarete e eieiate ec efalarotammlents 
DIG OGRAP TUBS. ie citisleeisafoieiere = o's sveresejasvaustos SAR Ashen stearelbusls ae cee St 
KIMPAMNOGRIAE TUSiertater-.clevele ere es ule teretarevetnie etarclalate ciate: ateraycharcvaloh otevereneroraiteitelaletenmel 0 
SUPPLEMENT. 
Descriptions of Graptolites from the Utica slate, introduced for comparison and illus- 
tration, 143-147. 
RINTDTI Ne tisic is Osrows love iaceteiniovel ofatevaleleve/ave laleneliaga tenes rates ateletempetereieiuietale ala\tesajetufarmials (ere etalereteterets 
149 
APPIMAVINEISS “(ola cs a's roreieh casera vejulotalaye tare fevereltiloleveleilein iaieha‘oteve feratavelaie,slavarereieicis cteiterelere reve sranaratn ts tate mL Ene 
ERRATA. 
Page 146, 6th line from bottom, and page 147, 4th line from bottom, for Rurxo- 
GRAPTUS read RETIOGRAPTUS. 
Page 147, second line from bottom, read “ The frond four times enlarged.” 
