A CIRCUM-INSULAR PALAZjOZOIC FAUNA. 909 
Island.— \n the following table all the genera occurring in the 
Chouteau group are tabulated with their geologic range’ and 
geographic distribution, and from this table the generic evidence 
of the origin of the fauna may be seen. 
b Gs} fe 
ey ae ae Ei s 
2 | FS ihe | 2 | 2 
Oo Ed = la) wn a 
S 26 nos 5 5 
a} o> 9350 & 5 
3) es] Saa| < cs] 
BRACHIOPODA. 
PAL PIU ey sierarocacors eer BHO ORO CERCA eM xx x x x x 
OLIGO NOTE OD Stn DC yo Oe TIO x x 
(SORTASE ADE AO OD POCO TCI CEO x x x x x 
(WHUTIE sec oun ooe Sveatsiarete i euatelspueieh cuaneinvans x x x x x 
ESIC AGA AR ROR x x x x x 
DEVIL A acai, ees gre iacaiens eieqeros arevela of sree re eceits x x K x x 
OLTLOTILCLES owe ayer saciaic et clene tare Wht ORO ts x x x xx x 
TE ROTI AAU: BSG, OO RIO A OOO OO EO OORT 5K x x 
Productus ..... Avan apkeyeeueh ower eens seen eieareren nacelle xX 
JERI OS HILO LBA 0 ir OOO CHENG 6 RE eee x x 
LORI IOI Ge PEPSICO ENO OR SOHO NERC x 5G x x x 
WEES IDI Aenea avon <r aerereratis A winca cia a eRe ee x x 
RY TEOCHOTLOUIAS Wa weasels encve tase lees ask oso bes ee eer Xe x xX x x 
SSCHLZSOPILON ERR. anen ein cee rte ee ere ae erie Xe 5 Xs XG ? 
[SDLP 1 CMBR ANG BO SSR PSTA TAA OS GUS OIE x x x x x 
LAMELLIBRANCHIATA. 
VA UCUTOPCCLEIEN erecta Wich Peaeterite Coker eres XG x 
COL ALOPS USI ee ate RS ee Oa Pee cen ees ea x x 
Edmondia....... Devisvevee ties aisha aa reTeN ena oas Ks x 
IBGHODMO, 65060006 60 oe x 
GLAU SIG en SIR x x x xX 
CUNO DCCLEVE: HRA Eon he COR eee x 
LEUIORRIS Gis GRAS BB oe OCOD ST Oe x 
JUST OGLE AAS hs BOS AE SAO AEN Lele LaseHaah arses x x x 
ISP ILEIOLUL Set Sem bWiclge ecg eters ieox fuses id, see eT x x 
GASTEROPODA. 
TQWTRY NOB 66000000006 Sisto shiekcoreila's ihalotgerets x x x xe x 
SICRMECDTRHUGHOS. 650000600000000000000000 XK XK x x x 
Euomphalus.........- Si eMtorohatans tatereouaneints Ny. x OK x x xe 
SEDERDNAUUE HE BS OO REO AEA DDT OD x x X xe x 
ENOL COU ASTHMA AES PNP OC eae erent x x x x x 
J OCA TS eh EERE OCR IBLE apenas x Ks x x 
SMILE ROUSE OD US A OCD Oe DO OOe x x 
CEPHALOPODA. 
GONTAL MCS i are TN ee oO x x 
IMEC AS Ac Pts BREESE CO Eee Oe EIETE x x x mK xe 
(WIRES SOPH COIS ROD GOO ORC OCR COAO x x x x x 
* The range of the genera above the Chouteau group is not tabulated. Ina future 
paper, now in preparation, the history of the faunas of the overlying Osage group 
will be considered. 
